Rename "modules" to "plugins", and fix up makefile variables etc

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@17565 dc483132-0cff-0310-8789-dd5450dbe970

130 files changed, 54693 insertions, 0 deletions

diff --git a/src/plugins/kdb/db2/ChangeLog b/src/plugins/kdb/db2/ChangeLog
new file mode 100644
index 0000000000..e88e25d732
--- /dev/null
+++ b/src/plugins/kdb/db2/ChangeLog
@@ -0,0 +1,142 @@
+2005-12-16  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (myfulldir, RELDIR): Updated for directory rename.
+
+2005-11-29  Ken Raeburn  <raeburn@mit.edu>
+
+	* policy_db.h: Include db.h after gssrpc/types.h, to fix
+	compilation on Tru64.
+
+2005-11-17  Ken Raeburn  <raeburn@mit.edu>
+
+	* policy_db.h: Include errno.h and krb5.h instead of k5-int.h.
+
+2005-10-27  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Set build_dynobj=yes.
+
+	* Makefile.in (DYNOBJ_LOADER_PROG, DYNOBJ_EXPLIBS_WITH_LOADER,
+	DYNOBJ_EXPDEPS_WITH_LOADER): New variables.
+
+2005-10-13  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (SHLIB_EXPLIBS): Revert 10-04 change; add support
+	library.
+
+2005-10-06  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (DBSHOBJLISTS): New variable.
+	($(DBOBJLISTS-k5), $(DBSHOBJLISTS)): Depend on recursion step.
+
+2005-10-04  Ken Raeburn  <raeburn@mit.edu>
+
+	* libdb2: Directory moved from util/db2.
+	* configure.in: Configure it, unless a system version is to be
+	used.
+	* Makefile.in (DBDIR): Updated.
+	($(DB_DEPS)): Depend on all-recurse.
+	(DB_VERSION, DB_DEPS, DB_DEPS-sys, DB_DEPS-k5, DB_DEPS-redirect,
+	DB_LIB, KDB5_DB_LIB, DB_DEPLIB, DB_DEPLIB-k5, DB_DEPLIB-sys):
+	Variable definitions moved here from config/pre.in.
+	(.depend-verify-db, depend-verify-db-k5, depend-verify-db-sys):
+	New targets, moved from config/post.in.
+	(.d): Depend on .depend-verify-db.
+
+	* Makefile.in (SHLIB_EXPLIBS): Only use gssrpc and KDB5_DB_LIB.
+	* configure.in: Set enable_shared=yes.
+
+	* kdb_xdr.c (krb5_dbe_create_key_data, krb5_dbe_update_tl_data,
+	krb5_dbe_lookup_tl_data, krb5_dbe_update_last_pwd_change,
+	krb5_dbe_lookup_last_pwd_change, krb5_dbe_update_mod_princ_data,
+	krb5_dbe_lookup_mod_princ_data, krb5_dbe_search_enctype,
+	krb5_dbe_find_enctype): Unused functions deleted.
+	(safe_realloc): Unused macro deleted.
+
+2005-09-22  Ken Raeburn  <raeburn@mit.edu>
+
+	* Directory moved from lib/kdb/kdb_db2 to modules/kdb/db2.
+	* Makefile.in (myfulldir, LOCALINCLUDES, RELDIR): Updated.
+	* db2_exp.c, kdb_db2.c: Include kdb5.h instead of ../kdb5.h.
+
+2005-08-20  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Use K5_AC_INIT instead of AC_INIT.
+
+2005-08-19  Ken Raeburn  <raeburn@mit.edu>
+
+	* kdb_db2.c (MAX_LOCK_TRIES): New macro.
+	(krb5_db2_db_lock): Always make non-blocking attempts to acquire
+	the lock.  Retry up to MAX_LOCK_TRIES times on failure.
+
+2005-07-06  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (LIBBASE): Change to db2.
+	(LIBMAJOR): Change to 0.
+	(all): Deleted explicit dependency.
+	(all-unix): Added here, without "lib" prefix.
+	(clean-unix): Drop clean-liblinks.
+	* db2_exp.c: (krb5_db_vftabl_db2): Renamed from ..._kdb_db2.
+	* db2.exports: Rename from libkdb_db2.exports, update for symbol
+	name change.
+
+2005-07-01  Ken Raeburn  <raeburn@mit.edu>
+
+	* kdb_db2.c: Reindent.  Use ISO C function decl style.  Delete
+	functions inside "#if 0".
+
+2005-06-29  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in: Use libnover_frag.
+	(LIB): Variable deleted, uses replaced with LIBBASE.
+	(SHLIB_EXPDEPS, SHLIB_EXPLIBS): Add gssrpc library and
+	depedencies.
+	(all-unix): Don't depend on all-liblinks.
+	(lib$(LIBBASE)$(SO_EXT)): Rule deleted.
+	(t_kdb, check, clean): Delete t_kdb references.
+
+2005-06-27  Ken Raeburn  <raeburn@mit.edu>
+
+	* kdb_db2.c: Don't use C++-style comments.
+	(krb5_db2_db_get_principal): Don't use variables named "try".
+
+2005-06-20  Ken Raeburn  <raeburn@mit.edu>
+
+	Novell merge.
+	* Makefile.in:
+	* adb_openclose.c: Moved from lib/kadm5/srv.  Include k5-int.h,
+	policy_db.h, db.h; don't include adb.h.
+	(osa_adb_create_db, osa_adb_destroy_db, osa_adb_rename_db,
+	osa_adb_init_db, osa_adb_fini_db, osa_adb_get_lock,
+	osa_adb_release_lock, osa_adb_open_and_lock,
+	osa_adb_close_and_unlock): Return krb5_error_code instead of
+	osa_adb_ret_t.
+	(osa_adb_rename_db, osa_adb_fini_db, osa_adb_get_lock,
+	osa_adb_release_lock): Change OSA_ADB_* lock flags to
+	KRB5_DB_LOCKMODE_* flags.
+	(osa_adb_get_lock): Initialize return variable.
+	* adb_policy.c: Moved from lib/kadm5/srv.  Include policy_db.h;
+	don't include adb.h.
+	(osa_adb_create_policy_db, osa_adb_rename_policy_db,
+	osa_adb_destroy_policy_db, osa_adb_open_policy,
+	osa_adb_close_policy): Functions deleted.
+	(osa_adb_create_policy, osa_adb_destroy_policy,
+	osa_adb_get_policy, osa_adb_put_policy, osa_adb_iter_policy):
+	Return krb5_error_code instead of osa_adb_ret_t.  Change OSA_ADB_*
+	lock flags to KRB5_DB_LOCKMODE_* flags.
+	(osa_adb_get_policy): Change policy name argument from
+	kadm5_policy_t to char*.  Add int* argument for returning count of
+	entries.  If no entries found, return success and zero count.
+	(osa_free_policy_ent): Moved here from old
+	lib/kadm5/srv/adb_free.c.
+	* configure.in:
+	* db2_exp.c:
+	* kdb_compat.h:
+	* kdb_db2.c:
+	* kdb_db2.h:
+	* kdb_xdr.c:
+	* kdb_xdr.h:
+	* libkdb_db2.exports: New file.  Export only the virtual function
+	table.
+	* pol_xdr.c:
+	* policy_db.h:
+
diff --git a/src/plugins/kdb/db2/Makefile.in b/src/plugins/kdb/db2/Makefile.in
new file mode 100644
index 0000000000..5dd15be3e4
--- /dev/null
+++ b/src/plugins/kdb/db2/Makefile.in
@@ -0,0 +1,148 @@
+thisconfigdir=.
+myfulldir=plugins/kdb/db2
+mydir=.
+BUILDTOP=$(REL)..$(S)..$(S)..
+KRB5_RUN_ENV = @KRB5_RUN_ENV@
+KRB5_CONFIG_SETUP = KRB5_CONFIG=$(SRCTOP)/config-files/krb5.conf ; export KRB5_CONFIG ;
+PROG_LIBPATH=-L$(TOPLIBD)
+PROG_RPATH=$(KRB5_LIBDIR)
+
+LOCALINCLUDES = -I../../../lib/kdb -I$(srcdir)/../../../lib/kdb
+
+DB_VERSION	= @DB_VERSION@
+DB_DEPS		= $(DB_DEPS-@DB_HEADER_VERSION@)
+DB_DEPS-sys	=
+DB_DEPS-k5	= $(BUILDTOP)/include/db.h $(BUILDTOP)/include/db-config.h
+DB_DEPS-redirect = $(BUILDTOP)/include/db.h
+DB_LIB		= @DB_LIB@
+KDB5_DB_LIB	= @KDB5_DB_LIB@
+DB_DEPLIB	= $(DB_DEPLIB-@DB_VERSION@)
+DB_DEPLIB-k5	= $(TOPLIBD)/libdb$(DEPLIBEXT)
+DB_DEPLIB-sys	=
+
+LIBBASE=db2
+LIBMAJOR=0
+LIBMINOR=0
+SO_EXT=.so
+RELDIR=../plugins/kdb/db2
+# Depends on libk5crypto and libkrb5
+# Also on gssrpc, for xdr stuff.
+SHLIB_EXPDEPS = \
+	$(GSSRPC_DEPLIBS) \
+	$(TOPLIBD)/libk5crypto$(SHLIBEXT) \
+	$(TOPLIBD)/libkrb5$(SHLIBEXT)
+SHLIB_EXPLIBS= $(GSSRPC_LIBS) -lkrb5 -lcom_err -lk5crypto $(KDB5_DB_LIB) $(SUPPORT_LIB) $(LIBS)
+# -lgssrpc $(KDB5_DB_LIB)
+
+SHLIB_DIRS=-L$(TOPLIBD)
+SHLIB_RDIRS=$(KRB5_LIBDIR)
+
+DBDIR = libdb2
+DBOBJLISTS = $(DBOBJLISTS-@DB_VERSION@)
+DBOBJLISTS-sys =
+DBOBJLISTS-k5 = $(DBDIR)/hash/OBJS.ST $(DBDIR)/btree/OBJS.ST \
+	$(DBDIR)/db/OBJS.ST $(DBDIR)/mpool/OBJS.ST $(DBDIR)/recno/OBJS.ST \
+	$(DBDIR)/clib/OBJS.ST
+DBSHOBJLISTS = $(DBOBJLISTS:.ST=.SH)
+
+SRCS= \
+	$(srcdir)/kdb_xdr.c \
+	$(srcdir)/adb_openclose.c \
+	$(srcdir)/adb_policy.c \
+	$(srcdir)/kdb_db2.c \
+	$(srcdir)/pol_xdr.c \
+	$(srcdir)/db2_exp.c
+
+STOBJLISTS=OBJS.ST $(DBOBJLISTS)
+STLIBOBJS= \
+	kdb_xdr.o \
+	adb_openclose.o \
+	adb_policy.o \
+	kdb_db2.o \
+	pol_xdr.o \
+	db2_exp.o
+
+DYNOBJ_LOADER_PROG = $(BUILDTOP)/kdc/krb5kdc
+DYNOBJ_EXPLIBS_WITH_LOADER = -lgssrpc $(KDB5_DB_LIB)
+DYNOBJ_EXPDEPS_WITH_LOADER = $(GSSRPC_DEPLIBS)
+
+all-unix:: $(LIBBASE)$(SO_EXT)
+install-unix:: install-libs
+clean-unix:: clean-libs clean-libobjs
+
+$(DB_DEPS) $(DBOBJLISTS-k5) $(DBSHOBJLISTS): all-recurse
+
+#lib$(LIBBASE)$(SO_EXT): db2_exp.o
+#	$(CC) -shared -o $@ -L$(TOPLIBD) $^ -ldb $(SHLIB_EXPLIBS)
+
+clean::
+	$(RM) lib$(LIBBASE)$(SO_EXT) db2_exp.o
+
+# @libnover_frag@
+# @libobj_frag@
+
+.depend-verify-db: depend-verify-db-$(DB_VERSION)
+depend-verify-db-k5:
+	@if test -r .depend-verify-db; then :; \
+		else (set -x; touch .depend-verify-db); fi
+depend-verify-db-sys:
+	@echo 1>&2 error: cannot build dependencies using system db package
+	@exit 1
+
+.d: .depend-verify-db
+
+# +++ Dependency line eater +++
+# 
+# Makefile dependencies follow.  This must be the last section in
+# the Makefile.in file
+#
+kdb_xdr.so kdb_xdr.po $(OUTPRE)kdb_xdr.$(OBJEXT): kdb_xdr.c \
+  $(SRCTOP)/include/k5-int.h $(BUILDTOP)/include/krb5/osconf.h \
+  $(BUILDTOP)/include/krb5/autoconf.h $(SRCTOP)/include/k5-platform.h \
+  $(SRCTOP)/include/k5-thread.h $(BUILDTOP)/include/krb5.h \
+  $(COM_ERR_DEPS) $(BUILDTOP)/include/profile.h $(SRCTOP)/include/port-sockets.h \
+  $(SRCTOP)/include/socket-utils.h $(SRCTOP)/include/krb5/kdb.h \
+  kdb_xdr.h
+adb_openclose.so adb_openclose.po $(OUTPRE)adb_openclose.$(OBJEXT): \
+  adb_openclose.c $(SRCTOP)/include/k5-int.h $(BUILDTOP)/include/krb5/osconf.h \
+  $(BUILDTOP)/include/krb5/autoconf.h $(SRCTOP)/include/k5-platform.h \
+  $(SRCTOP)/include/k5-thread.h $(BUILDTOP)/include/krb5.h \
+  $(COM_ERR_DEPS) $(BUILDTOP)/include/profile.h $(SRCTOP)/include/port-sockets.h \
+  $(SRCTOP)/include/socket-utils.h $(SRCTOP)/include/krb5/kdb.h \
+  policy_db.h $(DB_DEPS) $(BUILDTOP)/include/gssrpc/types.h \
+  $(BUILDTOP)/include/gssrpc/rename.h $(BUILDTOP)/include/gssrpc/xdr.h \
+  $(BUILDTOP)/lib/kdb/adb_err.h
+adb_policy.so adb_policy.po $(OUTPRE)adb_policy.$(OBJEXT): \
+  adb_policy.c policy_db.h $(BUILDTOP)/include/krb5.h \
+  $(COM_ERR_DEPS) $(SRCTOP)/include/krb5/kdb.h $(DB_DEPS) \
+  $(BUILDTOP)/include/gssrpc/types.h $(BUILDTOP)/include/gssrpc/rename.h \
+  $(BUILDTOP)/include/gssrpc/xdr.h $(BUILDTOP)/lib/kdb/adb_err.h
+kdb_db2.so kdb_db2.po $(OUTPRE)kdb_db2.$(OBJEXT): kdb_db2.c \
+  $(SRCTOP)/include/k5-int.h $(BUILDTOP)/include/krb5/osconf.h \
+  $(BUILDTOP)/include/krb5/autoconf.h $(SRCTOP)/include/k5-platform.h \
+  $(SRCTOP)/include/k5-thread.h $(BUILDTOP)/include/krb5.h \
+  $(COM_ERR_DEPS) $(BUILDTOP)/include/profile.h $(SRCTOP)/include/port-sockets.h \
+  $(SRCTOP)/include/socket-utils.h $(SRCTOP)/include/krb5/kdb.h \
+  $(DB_DEPS) $(SRCTOP)/lib/kdb/kdb5.h $(SRCTOP)/lib/kdb/err_handle.h \
+  kdb_db2.h policy_db.h $(BUILDTOP)/include/gssrpc/types.h \
+  $(BUILDTOP)/include/gssrpc/rename.h $(BUILDTOP)/include/gssrpc/xdr.h \
+  $(BUILDTOP)/lib/kdb/adb_err.h kdb_xdr.h kdb_compat.h
+pol_xdr.so pol_xdr.po $(OUTPRE)pol_xdr.$(OBJEXT): pol_xdr.c \
+  $(BUILDTOP)/include/krb5.h $(COM_ERR_DEPS) $(BUILDTOP)/include/gssrpc/rpc.h \
+  $(BUILDTOP)/include/gssrpc/types.h $(BUILDTOP)/include/gssrpc/rename.h \
+  $(BUILDTOP)/include/gssrpc/xdr.h $(BUILDTOP)/include/gssrpc/auth.h \
+  $(BUILDTOP)/include/gssrpc/clnt.h $(BUILDTOP)/include/gssrpc/rpc_msg.h \
+  $(BUILDTOP)/include/gssrpc/auth_unix.h $(BUILDTOP)/include/gssrpc/auth_gss.h \
+  $(BUILDTOP)/include/gssapi/gssapi.h $(BUILDTOP)/include/gssrpc/svc_auth.h \
+  $(BUILDTOP)/include/gssrpc/svc.h $(SRCTOP)/include/krb5/kdb.h \
+  policy_db.h $(DB_DEPS) $(BUILDTOP)/lib/kdb/adb_err.h
+db2_exp.so db2_exp.po $(OUTPRE)db2_exp.$(OBJEXT): db2_exp.c \
+  $(SRCTOP)/include/k5-int.h $(BUILDTOP)/include/krb5/osconf.h \
+  $(BUILDTOP)/include/krb5/autoconf.h $(SRCTOP)/include/k5-platform.h \
+  $(SRCTOP)/include/k5-thread.h $(BUILDTOP)/include/krb5.h \
+  $(COM_ERR_DEPS) $(BUILDTOP)/include/profile.h $(SRCTOP)/include/port-sockets.h \
+  $(SRCTOP)/include/socket-utils.h $(SRCTOP)/include/krb5/kdb.h \
+  $(DB_DEPS) $(SRCTOP)/lib/kdb/kdb5.h $(SRCTOP)/lib/kdb/err_handle.h \
+  kdb_db2.h policy_db.h $(BUILDTOP)/include/gssrpc/types.h \
+  $(BUILDTOP)/include/gssrpc/rename.h $(BUILDTOP)/include/gssrpc/xdr.h \
+  $(BUILDTOP)/lib/kdb/adb_err.h kdb_xdr.h
diff --git a/src/plugins/kdb/db2/adb_openclose.c b/src/plugins/kdb/db2/adb_openclose.c
new file mode 100644
index 0000000000..97ce1123b2
--- /dev/null
+++ b/src/plugins/kdb/db2/adb_openclose.c
@@ -0,0 +1,412 @@
+/*
+ * Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
+ *
+ * $Header$ 
+ */
+
+#if !defined(lint) && !defined(__CODECENTER__)
+static char *rcsid = "$Header$";
+#endif
+
+#include	<sys/file.h>
+#include	<fcntl.h>
+#include	<unistd.h>
+#include        <k5-int.h>
+#include	"policy_db.h"
+#include	<stdlib.h>
+#include        <db.h>
+
+#define MAX_LOCK_TRIES 5
+
+struct _locklist {
+     osa_adb_lock_ent lockinfo;
+     struct _locklist *next;
+};
+
+krb5_error_code osa_adb_create_db(char *filename, char *lockfilename,
+				  int magic)
+{
+     int lf;
+     DB *db;
+     BTREEINFO btinfo;
+     
+     memset(&btinfo, 0, sizeof(btinfo));
+     btinfo.flags = 0;
+     btinfo.cachesize = 0;
+     btinfo.psize = 4096;
+     btinfo.lorder = 0;
+     btinfo.minkeypage = 0;
+     btinfo.compare = NULL;
+     btinfo.prefix = NULL;
+     db = dbopen(filename, O_RDWR | O_CREAT | O_EXCL, 0600, DB_BTREE, &btinfo);
+     if (db == NULL)
+	  return errno;
+     if (db->close(db) < 0)
+	  return errno;
+
+     /* only create the lock file if we successfully created the db */
+     lf = THREEPARAMOPEN(lockfilename, O_RDWR | O_CREAT | O_EXCL, 0600);
+     if (lf == -1)
+	  return errno;
+     (void) close(lf);
+     
+     return OSA_ADB_OK;
+}
+
+krb5_error_code osa_adb_destroy_db(char *filename, char *lockfilename,
+				 int magic)
+{
+     /* the admin databases do not contain security-critical data */
+     if (unlink(filename) < 0 ||
+	 unlink(lockfilename) < 0)
+	  return errno;
+     return OSA_ADB_OK;
+}
+
+krb5_error_code osa_adb_rename_db(char *filefrom, char *lockfrom,
+				char *fileto, char *lockto, int magic)
+{
+     osa_adb_db_t fromdb, todb;
+     krb5_error_code ret;
+
+     /* make sure todb exists */
+     if ((ret = osa_adb_create_db(fileto, lockto, magic)) &&
+	 ret != EEXIST)
+	  return ret;
+
+     if ((ret = osa_adb_init_db(&fromdb, filefrom, lockfrom, magic)))
+	  return ret;
+     if ((ret = osa_adb_init_db(&todb, fileto, lockto, magic))) {
+	  (void) osa_adb_fini_db(fromdb, magic);
+	  return ret;
+     }
+     if ((ret = osa_adb_get_lock(fromdb, KRB5_DB_LOCKMODE_PERMANENT))) {
+	  (void) osa_adb_fini_db(fromdb, magic);
+	  (void) osa_adb_fini_db(todb, magic);
+	  return ret;
+     }
+     if ((ret = osa_adb_get_lock(todb, KRB5_DB_LOCKMODE_PERMANENT))) {
+	  (void) osa_adb_fini_db(fromdb, magic);
+	  (void) osa_adb_fini_db(todb, magic);
+	  return ret;
+     }
+     if ((rename(filefrom, fileto) < 0)) {
+	  (void) osa_adb_fini_db(fromdb, magic);
+	  (void) osa_adb_fini_db(todb, magic);
+	  return errno;
+     }
+     /*
+      * Do not release the lock on fromdb because it is being renamed
+      * out of existence; no one can ever use it again.
+      */
+     if ((ret = osa_adb_release_lock(todb))) {
+	  (void) osa_adb_fini_db(fromdb, magic);
+	  (void) osa_adb_fini_db(todb, magic);
+	  return ret;
+     }
+	  
+     (void) osa_adb_fini_db(fromdb, magic);
+     (void) osa_adb_fini_db(todb, magic);
+     return 0;
+}
+
+krb5_error_code osa_adb_init_db(osa_adb_db_t *dbp, char *filename,
+			      char *lockfilename, int magic)
+{
+     osa_adb_db_t db;
+     static struct _locklist *locklist = NULL;
+     struct _locklist *lockp;
+     krb5_error_code code;
+     
+     if (dbp == NULL || filename == NULL)
+	  return EINVAL;
+
+     db = (osa_adb_princ_t) malloc(sizeof(osa_adb_db_ent));
+     if (db == NULL)
+	  return ENOMEM;
+
+     memset(db, 0, sizeof(*db));
+     db->info.hash = NULL;
+     db->info.bsize = 256;
+     db->info.ffactor = 8;
+     db->info.nelem = 25000;
+     db->info.lorder = 0;
+
+     db->btinfo.flags = 0;
+     db->btinfo.cachesize = 0;
+     db->btinfo.psize = 4096;
+     db->btinfo.lorder = 0;
+     db->btinfo.minkeypage = 0;
+     db->btinfo.compare = NULL;
+     db->btinfo.prefix = NULL;
+     /*
+      * A process is allowed to open the same database multiple times
+      * and access it via different handles.  If the handles use
+      * distinct lockinfo structures, things get confused: lock(A),
+      * lock(B), release(B) will result in the kernel unlocking the
+      * lock file but handle A will still think the file is locked.
+      * Therefore, all handles using the same lock file must share a
+      * single lockinfo structure.
+      *
+      * It is not sufficient to have a single lockinfo structure,
+      * however, because a single process may also wish to open
+      * multiple different databases simultaneously, with different
+      * lock files.  This code used to use a single static lockinfo
+      * structure, which means that the second database opened used
+      * the first database's lock file.  This was Bad.
+      *
+      * We now maintain a linked list of lockinfo structures, keyed by
+      * lockfilename.  An entry is added when this function is called
+      * with a new lockfilename, and all subsequent calls with that
+      * lockfilename use the existing entry, updating the refcnt.
+      * When the database is closed with fini_db(), the refcnt is
+      * decremented, and when it is zero the lockinfo structure is
+      * freed and reset.  The entry in the linked list, however, is
+      * never removed; it will just be reinitialized the next time
+      * init_db is called with the right lockfilename.
+      */
+
+     /* find or create the lockinfo structure for lockfilename */
+     lockp = locklist;
+     while (lockp) {
+	  if (strcmp(lockp->lockinfo.filename, lockfilename) == 0)
+	       break;
+	  else
+	       lockp = lockp->next;
+     }
+     if (lockp == NULL) {
+	  /* doesn't exist, create it, add to list */
+	  lockp = (struct _locklist *) malloc(sizeof(*lockp));
+	  if (lockp == NULL) {
+	       free(db);
+	       return ENOMEM;
+	  }
+	  memset(lockp, 0, sizeof(*lockp));
+	  lockp->next = locklist;
+	  locklist = lockp;
+     }
+
+     /* now initialize lockp->lockinfo if necessary */
+     if (lockp->lockinfo.lockfile == NULL) {
+	  if ((code = krb5_init_context(&lockp->lockinfo.context))) {
+	       free(db);
+	       return((krb5_error_code) code);
+	  }
+
+	  /*
+	   * needs be open read/write so that write locking can work with
+	   * POSIX systems
+	   */
+	  lockp->lockinfo.filename = strdup(lockfilename);
+	  if ((lockp->lockinfo.lockfile = fopen(lockfilename, "r+")) == NULL) {
+	       /*
+		* maybe someone took away write permission so we could only
+		* get shared locks?
+		*/
+	       if ((lockp->lockinfo.lockfile = fopen(lockfilename, "r"))
+		   == NULL) {
+		    free(db);
+		    return OSA_ADB_NOLOCKFILE;
+	       }
+	  }
+	  lockp->lockinfo.lockmode = lockp->lockinfo.lockcnt = 0;
+     }
+
+     /* lockp is set, lockinfo is initialized, update the reference count */
+     db->lock = &lockp->lockinfo;
+     db->lock->refcnt++;
+
+     db->opencnt = 0;
+     db->filename = strdup(filename);
+     db->magic = magic;
+
+     *dbp = db;
+     
+     return OSA_ADB_OK;
+}
+
+krb5_error_code osa_adb_fini_db(osa_adb_db_t db, int magic)
+{
+     if (db->magic != magic)
+	  return EINVAL;
+     if (db->lock->refcnt == 0) {
+	  /* barry says this can't happen */
+	  return OSA_ADB_FAILURE;
+     } else {
+	  db->lock->refcnt--;
+     }
+
+     if (db->lock->refcnt == 0) {
+	  /*
+	   * Don't free db->lock->filename, it is used as a key to
+	   * find the lockinfo entry in the linked list.  If the
+	   * lockfile doesn't exist, we must be closing the database
+	   * after trashing it.  This has to be allowed, so don't
+	   * generate an error.
+	   */
+	  if (db->lock->lockmode != KRB5_DB_LOCKMODE_PERMANENT)
+	       (void) fclose(db->lock->lockfile);
+	  db->lock->lockfile = NULL;
+	  krb5_free_context(db->lock->context);
+     }
+
+     db->magic = 0;
+     free(db->filename);
+     free(db);
+     return OSA_ADB_OK;
+}     
+     
+krb5_error_code osa_adb_get_lock(osa_adb_db_t db, int mode)
+{
+     int tries, gotlock, perm, krb5_mode, ret = 0;
+
+     if (db->lock->lockmode >= mode) {
+	  /* No need to upgrade lock, just incr refcnt and return */
+	  db->lock->lockcnt++;
+	  return(OSA_ADB_OK);
+     }
+
+     perm = 0;
+     switch (mode) {
+	case KRB5_DB_LOCKMODE_PERMANENT:
+	  perm = 1;
+	case KRB5_DB_LOCKMODE_EXCLUSIVE:
+	  krb5_mode = KRB5_LOCKMODE_EXCLUSIVE;
+	  break;
+	case KRB5_DB_LOCKMODE_SHARED:
+	  krb5_mode = KRB5_LOCKMODE_SHARED;
+	  break;
+	default:
+	  return(EINVAL);
+     }
+
+     for (gotlock = tries = 0; tries < MAX_LOCK_TRIES; tries++) {
+	  if ((ret = krb5_lock_file(db->lock->context,
+				    fileno(db->lock->lockfile),
+				    krb5_mode|KRB5_LOCKMODE_DONTBLOCK)) == 0) {
+	       gotlock++;
+	       break;
+	  } else if (ret == EBADF && mode == KRB5_DB_LOCKMODE_EXCLUSIVE)
+	       /* tried to exclusive-lock something we don't have */
+	       /* write access to */
+	       return OSA_ADB_NOEXCL_PERM;
+
+	  sleep(1);
+     }
+
+     /* test for all the likely "can't get lock" error codes */
+     if (ret == EACCES || ret == EAGAIN || ret == EWOULDBLOCK)
+	  return OSA_ADB_CANTLOCK_DB;
+     else if (ret != 0)
+	  return ret;
+
+     /*
+      * If the file no longer exists, someone acquired a permanent
+      * lock.  If that process terminates its exclusive lock is lost,
+      * but if we already had the file open we can (probably) lock it
+      * even though it has been unlinked.  So we need to insist that
+      * it exist.
+      */
+     if (access(db->lock->filename, F_OK) < 0) {
+	  (void) krb5_lock_file(db->lock->context,
+				fileno(db->lock->lockfile),
+				KRB5_LOCKMODE_UNLOCK);
+	  return OSA_ADB_NOLOCKFILE;
+     }
+     
+     /* we have the shared/exclusive lock */
+     
+     if (perm) {
+	  if (unlink(db->lock->filename) < 0) {
+	       /* somehow we can't delete the file, but we already */
+	       /* have the lock, so release it and return */
+
+	       ret = errno;
+	       (void) krb5_lock_file(db->lock->context,
+				     fileno(db->lock->lockfile),
+				     KRB5_LOCKMODE_UNLOCK);
+	       
+	       /* maybe we should return CANTLOCK_DB.. but that would */
+	       /* look just like the db was already locked */
+	       return ret;
+	  }
+
+	  /* this releases our exclusive lock.. which is okay because */
+	  /* now no one else can get one either */
+	  (void) fclose(db->lock->lockfile);
+     }
+     
+     db->lock->lockmode = mode;
+     db->lock->lockcnt++;
+     return OSA_ADB_OK;
+}
+
+krb5_error_code osa_adb_release_lock(osa_adb_db_t db)
+{
+     int ret, fd;
+     
+     if (!db->lock->lockcnt)		/* lock already unlocked */
+	  return OSA_ADB_NOTLOCKED;
+
+     if (--db->lock->lockcnt == 0) {
+	  if (db->lock->lockmode == KRB5_DB_LOCKMODE_PERMANENT) {
+	       /* now we need to create the file since it does not exist */
+               fd = THREEPARAMOPEN(db->lock->filename,O_RDWR | O_CREAT | O_EXCL,
+                                   0600);
+	       if ((db->lock->lockfile = fdopen(fd, "w+")) == NULL)
+		    return OSA_ADB_NOLOCKFILE;
+	  } else if ((ret = krb5_lock_file(db->lock->context,
+					  fileno(db->lock->lockfile),
+					  KRB5_LOCKMODE_UNLOCK)))
+	       return ret;
+	  
+	  db->lock->lockmode = 0;
+     }
+     return OSA_ADB_OK;
+}
+
+krb5_error_code osa_adb_open_and_lock(osa_adb_princ_t db, int locktype)
+{
+     int ret;
+
+     ret = osa_adb_get_lock(db, locktype);
+     if (ret != OSA_ADB_OK)
+	  return ret;
+     if (db->opencnt)
+	  goto open_ok;
+
+     db->db = dbopen(db->filename, O_RDWR, 0600, DB_BTREE, &db->btinfo);
+     if (db->db != NULL)
+	 goto open_ok;
+     switch (errno) {
+#ifdef EFTYPE
+     case EFTYPE:
+#endif
+     case EINVAL:
+	  db->db = dbopen(db->filename, O_RDWR, 0600, DB_HASH, &db->info);
+	  if (db->db != NULL)
+	       goto open_ok;
+     default:
+	  (void) osa_adb_release_lock(db);
+	  if (errno == EINVAL)
+	       return OSA_ADB_BAD_DB;
+	  return errno;
+     }
+open_ok:
+     db->opencnt++;
+     return OSA_ADB_OK;
+}
+
+krb5_error_code osa_adb_close_and_unlock(osa_adb_princ_t db)
+{
+     if (--db->opencnt)
+	  return osa_adb_release_lock(db);
+     if(db->db != NULL && db->db->close(db->db) == -1) {
+	  (void) osa_adb_release_lock(db);
+	  return OSA_ADB_FAILURE;
+     }
+
+     db->db = NULL;
+
+     return(osa_adb_release_lock(db));
+}
diff --git a/src/plugins/kdb/db2/adb_policy.c b/src/plugins/kdb/db2/adb_policy.c
new file mode 100644
index 0000000000..e338cbbd02
--- /dev/null
+++ b/src/plugins/kdb/db2/adb_policy.c
@@ -0,0 +1,389 @@
+/*
+ * Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
+ *
+ * $Header$
+ */
+
+#if !defined(lint) && !defined(__CODECENTER__)
+static char *rcsid = "$Header$";
+#endif
+
+#include	<sys/file.h>
+#include	<fcntl.h>
+#include	"policy_db.h"
+#include	<stdlib.h>
+#include	<string.h>
+#include <errno.h>
+
+#define OPENLOCK(db, mode) \
+{ \
+       int olret; \
+	    if (db == NULL) \
+		 return EINVAL; \
+	    else if (db->magic != OSA_ADB_POLICY_DB_MAGIC) \
+		 return OSA_ADB_DBINIT; \
+	    else if ((olret = osa_adb_open_and_lock(db, mode)) != OSA_ADB_OK) \
+		 return olret; \
+	    }
+
+#define CLOSELOCK(db) \
+{ \
+     int cl_ret; \
+     if ((cl_ret = osa_adb_close_and_unlock(db)) != OSA_ADB_OK) \
+	  return cl_ret; \
+}
+
+
+/*
+ * Function: osa_adb_create_policy
+ * 
+ * Purpose: create a policy entry in the policy db.
+ *
+ * Arguments:
+ *	entry		(input) pointer to the entry to be added
+ * 	<return value>	OSA_ADB_OK on success, else error code.
+ *
+ * Requires:
+ *	entry have a valid name.
+ * 
+ * Effects:
+ *	creates the entry in the db
+ *
+ * Modifies:
+ *	the policy db.
+ * 
+ */
+krb5_error_code
+osa_adb_create_policy(osa_adb_policy_t db, osa_policy_ent_t entry)
+{
+    DBT			dbkey;
+    DBT			dbdata;
+    XDR			xdrs;
+    int			ret;
+
+    OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE);
+
+    if(entry->name == NULL) {
+	 ret = EINVAL;
+	 goto error;
+    }
+    dbkey.data = entry->name;
+    dbkey.size = (strlen(entry->name) + 1);
+		
+    switch(db->db->get(db->db, &dbkey, &dbdata, 0)) {
+    case 0:
+	 ret = OSA_ADB_DUP;
+	 goto error;
+    case 1:
+	break;
+    default:
+	 ret = errno;
+	 goto error;
+    }
+    xdralloc_create(&xdrs, XDR_ENCODE);
+    if(!xdr_osa_policy_ent_rec(&xdrs, entry)) {
+	xdr_destroy(&xdrs);
+	ret = OSA_ADB_XDR_FAILURE;
+	goto error;
+    }
+    dbdata.data = xdralloc_getdata(&xdrs);
+    dbdata.size = xdr_getpos(&xdrs);
+    switch(db->db->put(db->db, &dbkey, &dbdata, R_NOOVERWRITE)) {
+    case 0:
+	if((db->db->sync(db->db, 0)) == -1)
+	    ret = OSA_ADB_FAILURE;
+	ret = OSA_ADB_OK;
+	break;
+    case 1:
+	ret = OSA_ADB_DUP;
+	break;
+    default:
+	ret = OSA_ADB_FAILURE;
+	break;
+    }
+    xdr_destroy(&xdrs);
+
+error:
+    CLOSELOCK(db);
+    return ret;
+}
+
+/*
+ * Function: osa_adb_destroy_policy
+ * 
+ * Purpose: destroy a policy entry
+ *
+ * Arguments:
+ *	db		(input) database handle
+ *	name		(input) name of policy
+ * 	<return value>	OSA_ADB_OK on success, or error code.
+ *
+ * Requires:
+ *	db being valid.
+ *	name being non-null.
+ * Effects:
+ *	deletes policy from db.
+ *
+ * Modifies:
+ *	policy db.
+ * 
+ */
+krb5_error_code
+osa_adb_destroy_policy(osa_adb_policy_t db, char *name)
+{
+    DBT	    dbkey;
+    int	    status, ret;
+
+    OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE);
+    
+    if(name == NULL) {
+	 ret = EINVAL;
+	 goto error;
+    }
+    dbkey.data = name;
+    dbkey.size = (strlen(name) + 1);
+
+    status = db->db->del(db->db, &dbkey, 0);
+    switch(status) {
+    case 1:
+	 ret = OSA_ADB_NOENT;
+	 goto error;
+    case 0:
+	 if ((db->db->sync(db->db, 0)) == -1) {
+	      ret = OSA_ADB_FAILURE;
+	      goto error;
+	 }
+	 ret = OSA_ADB_OK;
+	 break;
+    default:
+	 ret = OSA_ADB_FAILURE;
+	 goto error;
+    }
+
+error:
+    CLOSELOCK(db);
+    return ret;
+}
+
+/*
+ * Function: osa_adb_get_policy
+ * 
+ * Purpose: retrieve policy
+ *
+ * Arguments:
+ *	db		(input) db handle
+ *	name		(input) name of policy
+ *	entry		(output) policy entry
+ *      cnt             (inout) Number of entries
+ * 	<return value>	0 on success, error code on failure.
+ *
+ * Requires:
+ * Effects:
+ * Modifies:
+ */
+krb5_error_code
+osa_adb_get_policy(osa_adb_policy_t db, char *name,
+		   osa_policy_ent_t *entry, int *cnt)
+{
+    DBT			dbkey;
+    DBT			dbdata;
+    XDR			xdrs;
+    int			ret;
+    char		*aligned_data;
+
+    OPENLOCK(db, KRB5_DB_LOCKMODE_SHARED);
+
+    *cnt = 1;
+
+    if(name == NULL) {
+	 ret = EINVAL;
+	 goto error;
+    }
+    dbkey.data = name;
+    dbkey.size = (strlen(dbkey.data) + 1);
+    dbdata.data = NULL;
+    dbdata.size = 0;
+    switch((db->db->get(db->db, &dbkey, &dbdata, 0))) {
+    case 1:
+	 ret = 0;
+	 *cnt = 0;
+	 goto error;
+    case 0:
+	break;
+    default:
+	 ret = OSA_ADB_FAILURE;
+	 goto error;
+    }
+    if (!(*(entry) = (osa_policy_ent_t)malloc(sizeof(osa_policy_ent_rec)))) {
+	 ret = ENOMEM;
+	 goto error;
+    }
+    if (!(aligned_data = (char *) malloc(dbdata.size))) {
+	 ret = ENOMEM;
+	 goto error;
+    }
+    memcpy(aligned_data, dbdata.data, dbdata.size);	
+    memset(*entry, 0, sizeof(osa_policy_ent_rec));
+    xdrmem_create(&xdrs, aligned_data, dbdata.size, XDR_DECODE);
+    if (!xdr_osa_policy_ent_rec(&xdrs, *entry)) 
+	ret =  OSA_ADB_FAILURE;
+    else ret = OSA_ADB_OK;
+    xdr_destroy(&xdrs);
+    free(aligned_data);
+
+error:
+    CLOSELOCK(db);
+    return ret;
+}
+
+/*
+ * Function: osa_adb_put_policy
+ * 
+ * Purpose: update a policy in the dababase
+ *
+ * Arguments:
+ *	db		(input) db handle
+ *	entry		(input) policy entry
+ * 	<return value>	0 on success error code on failure.
+ *
+ * Requires:
+ *	[requires]
+ * 
+ * Effects:
+ *	[effects]
+ *
+ * Modifies:
+ *	[modifies]
+ * 
+ */
+krb5_error_code
+osa_adb_put_policy(osa_adb_policy_t db, osa_policy_ent_t entry)
+{
+    DBT			dbkey;
+    DBT			dbdata;
+    DBT			tmpdb;
+    XDR			xdrs;
+    int			ret;
+
+    OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE);
+    
+    if(entry->name == NULL) {
+	 ret = EINVAL;
+	 goto error;
+    }
+    dbkey.data = entry->name;
+    dbkey.size = (strlen(entry->name) + 1);
+    switch(db->db->get(db->db, &dbkey, &tmpdb, 0)) {
+    case 0:
+	break;
+    case 1:
+	ret = OSA_ADB_NOENT;
+	goto error;
+    default:
+	ret = OSA_ADB_FAILURE;
+	goto error;
+    }
+    xdralloc_create(&xdrs, XDR_ENCODE);
+    if(!xdr_osa_policy_ent_rec(&xdrs, entry)) {
+	xdr_destroy(&xdrs);
+	ret = OSA_ADB_XDR_FAILURE;
+	goto error;
+    }
+    dbdata.data = xdralloc_getdata(&xdrs);
+    dbdata.size = xdr_getpos(&xdrs);
+    switch(db->db->put(db->db, &dbkey, &dbdata, 0)) {
+    case 0:
+	if((db->db->sync(db->db, 0)) == -1)
+	    ret = OSA_ADB_FAILURE;
+	ret = OSA_ADB_OK;
+	break;
+    default:
+	ret = OSA_ADB_FAILURE;
+	break;
+    }
+    xdr_destroy(&xdrs);
+
+error:
+    CLOSELOCK(db);
+    return ret;
+}
+
+/*
+ * Function: osa_adb_iter_policy
+ * 
+ * Purpose: iterate over the policy database.
+ *
+ * Arguments:
+ *	db		(input) db handle
+ *	func		(input) fucntion pointer to call
+ *	data		opaque data type
+ * 	<return value>	0 on success error code on failure
+ *
+ * Requires:
+ * Effects:
+ * Modifies:
+ */
+krb5_error_code
+osa_adb_iter_policy(osa_adb_policy_t db, osa_adb_iter_policy_func func,
+		    void *data)
+{
+    DBT			    dbkey,
+			    dbdata;
+    XDR			    xdrs;
+    int			    ret;
+    osa_policy_ent_t	    entry;
+    char		    *aligned_data;
+
+    OPENLOCK(db, KRB5_DB_LOCKMODE_EXCLUSIVE); /* hmmm */
+
+    if((ret = db->db->seq(db->db, &dbkey, &dbdata, R_FIRST)) == -1) {
+	 ret = errno;
+	 goto error;
+    }
+
+    while (ret == 0) {
+	if (!(entry = (osa_policy_ent_t) malloc(sizeof(osa_policy_ent_rec)))) {
+	     ret = ENOMEM;
+	     goto error;
+	}
+
+	if(!(aligned_data = (char *) malloc(dbdata.size))) {
+	     ret = ENOMEM;
+	     goto error;
+	}
+	memcpy(aligned_data, dbdata.data, dbdata.size);
+	
+	memset(entry, 0, sizeof(osa_policy_ent_rec));
+	xdrmem_create(&xdrs, aligned_data, dbdata.size, XDR_DECODE);
+	if(!xdr_osa_policy_ent_rec(&xdrs, entry)) {
+	    xdr_destroy(&xdrs);
+	    free(aligned_data);
+	    ret = OSA_ADB_FAILURE;
+	    goto error;
+	}
+	(*func)(data, entry);
+	xdr_destroy(&xdrs);
+	free(aligned_data);	
+	osa_free_policy_ent(entry);
+	ret = db->db->seq(db->db, &dbkey, &dbdata, R_NEXT);
+    }
+    if(ret == -1)
+	 ret = errno;
+    else ret = OSA_ADB_OK;
+
+error:
+    CLOSELOCK(db);
+    return ret;
+}
+
+void
+osa_free_policy_ent(osa_policy_ent_t val)
+{
+  XDR xdrs;
+
+  xdrmem_create(&xdrs, NULL, 0, XDR_FREE);
+
+  xdr_osa_policy_ent_rec(&xdrs, val);
+
+  free(val);
+}
diff --git a/src/plugins/kdb/db2/configure.in b/src/plugins/kdb/db2/configure.in
new file mode 100644
index 0000000000..9f958db122
--- /dev/null
+++ b/src/plugins/kdb/db2/configure.in
@@ -0,0 +1,27 @@
+K5_AC_INIT(configure.in)
+enable_shared=yes
+build_dynobj=yes
+CONFIG_RULES
+AC_CHECK_HEADERS(unistd.h)
+AC_TYPE_MODE_T
+AC_TYPE_OFF_T
+
+AC_CHECK_FUNCS(srand48 srand srandom umask)
+
+dnl AIX is unusual in that it wants all symbols resolved at link time
+dnl  Fortunately, it will allow us to link the kdb library now, even if
+dnl it is linked again later.
+case $krb5_cv_host in
+*-*-aix*)
+	LIBS="$LIBS -ldb"
+	;;
+esac
+KRB5_RUN_FLAGS
+dnl The following is for check...
+KRB5_BUILD_PROGRAM
+KRB5_BUILD_LIBOBJS
+KRB5_BUILD_LIBRARY_WITH_DEPS
+if test "$DB_VERSION" = k5 ; then
+  AC_CONFIG_SUBDIRS(libdb2)
+fi
+V5_AC_OUTPUT_MAKEFILE
diff --git a/src/plugins/kdb/db2/db2.exports b/src/plugins/kdb/db2/db2.exports
new file mode 100644
index 0000000000..25320ff729
--- /dev/null
+++ b/src/plugins/kdb/db2/db2.exports
@@ -0,0 +1 @@
+krb5_db_vftabl_db2
diff --git a/src/plugins/kdb/db2/db2_exp.c b/src/plugins/kdb/db2/db2_exp.c
new file mode 100644
index 0000000000..f119de3de9
--- /dev/null
+++ b/src/plugins/kdb/db2/db2_exp.c
@@ -0,0 +1,64 @@
+/**********************************************************************
+*
+*	C %name:		db2_exp.c %
+*	Instance:		idc_sec_2
+*	Description:	
+*	%created_by:	spradeep %
+*	%date_created:	Tue Apr  5 11:44:00 2005 %
+*
+**********************************************************************/
+#ifndef lint
+static char *_csrc = "@(#) %filespec: db2_exp.c~5 %  (%full_filespec: db2_exp.c~5:csrc:idc_sec#2 %)";
+#endif
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "k5-int.h"
+#include <db.h>
+#include <stdio.h>
+#include <errno.h>
+#include <utime.h>
+#include "kdb5.h"
+#include "kdb_db2.h"
+#include "kdb_xdr.h"
+#include "policy_db.h"
+
+/*
+ *      Exposed API
+ */
+
+kdb_vftabl krb5_db_vftabl_db2 = {
+  1,                                      /* major version number 1 */
+  0,                                      /* minor version number 0 */
+  0,                                      /* TBD. Not sure whether thread safe. For now, its not */
+  /* init_library */			       krb5_db2_lib_init,
+  /* fini_library */			       krb5_db2_lib_cleanup,
+  /* init_module */			       krb5_db2_open,
+  /* fini_module */			       krb5_db2_db_fini,
+  /* db_create */			       krb5_db2_create,
+  /* db_destroy */			       krb5_db2_destroy,
+  /* db_get_age */                             krb5_db2_db_get_age,
+  /* db_set_option */			       krb5_db2_db_set_option,
+  /* db_lock */				       krb5_db2_db_lock,
+  /* db_unlock */			       krb5_db2_db_unlock,
+  /* db_get_principal */		       krb5_db2_db_get_principal,
+  /* db_free_principal */		       krb5_db2_db_free_principal,
+  /* db_put_principal */		       krb5_db2_db_put_principal,
+  /* db_delete_principal */		       krb5_db2_db_delete_principal,
+  /* db_iterate */			       krb5_db2_db_iterate,
+  /* db_create_policy */                       krb5_db2_create_policy,
+  /* db_get_policy */                          krb5_db2_get_policy,
+  /* db_put_policy */                          krb5_db2_put_policy,
+  /* db_iter_policy */                         krb5_db2_iter_policy,
+  /* db_delete_policy */                       krb5_db2_delete_policy,
+  /* db_free_policy */                         krb5_db2_free_policy,
+  /* db_supported_realms */		       NULL,
+  /* db_free_supported_realms */	       NULL,
+  /* errcode_2_string */                       NULL,
+  /* db_alloc */                               krb5_db2_alloc,
+  /* db_free */                                krb5_db2_free,
+  /* set_master_key */			       krb5_db2_set_master_key_ext,
+  /* get_master_key */			       krb5_db2_db_get_mkey
+};
diff --git a/src/plugins/kdb/db2/kdb_compat.h b/src/plugins/kdb/db2/kdb_compat.h
new file mode 100644
index 0000000000..540d4a2499
--- /dev/null
+++ b/src/plugins/kdb/db2/kdb_compat.h
@@ -0,0 +1,81 @@
+/*
+ * lib/kdb/kdb_compat.h
+ *
+ * Copyright 1994 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ *
+ * KDC Database interface definitions.
+ */
+
+
+typedef struct _old_krb5_encrypted_keyblock {
+    krb5_enctype enctype;
+    int length;
+    krb5_octet *contents;
+} old_krb5_encrypted_keyblock;
+
+typedef struct old_krb5_principal_data {
+    krb5_magic magic;
+    krb5_data realm;
+    krb5_data *data;		/* An array of strings */
+    krb5_int32 length;
+    krb5_int32 type;
+} old_krb5_principal_data;
+
+typedef	old_krb5_principal_data *old_krb5_principal;
+
+
+/*
+ * Note --- this structure cannot be modified without changing the
+ * database version number in libkdb.a
+ */
+typedef struct _old_krb5_db_entry {
+    old_krb5_principal principal;
+    old_krb5_encrypted_keyblock key;
+    krb5_kvno kvno;
+    krb5_deltat	max_life;
+    krb5_deltat	max_renewable_life;
+    krb5_kvno mkvno;			/* master encryption key vno */
+    
+    krb5_timestamp expiration;		/* This is when the client expires */
+    krb5_timestamp pw_expiration; 	/* This is when its password does */
+    krb5_timestamp last_pwd_change; 	/* Last time of password change  */
+    krb5_timestamp last_success;	/* Last successful password */
+    
+    krb5_timestamp last_failed;		/* Last failed password attempt */
+    krb5_kvno fail_auth_count; 		/* # of failed password attempts */
+    
+    old_krb5_principal mod_name;
+    krb5_timestamp mod_date;
+    krb5_flags attributes;
+    krb5_int32 salt_type:8,
+ 	       salt_length:24;
+    krb5_octet *salt;
+    old_krb5_encrypted_keyblock alt_key;
+    krb5_int32 alt_salt_type:8,
+ 	       alt_salt_length:24;
+    krb5_octet *alt_salt;
+    
+    krb5_int32 expansion[8];
+} old_krb5_db_entry;
+
diff --git a/src/plugins/kdb/db2/kdb_db2.c b/src/plugins/kdb/db2/kdb_db2.c
new file mode 100644
index 0000000000..f3950eeccd
--- /dev/null
+++ b/src/plugins/kdb/db2/kdb_db2.c
@@ -0,0 +1,1561 @@
+/*
+ * lib/kdb/kdb_db2.c
+ *
+ * Copyright 1997 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ */
+
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ *
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government.  It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  FundsXpress makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "k5-int.h"
+#include <db.h>
+#include <stdio.h>
+#include <errno.h>
+#include <utime.h>
+#include "kdb5.h"
+#include "kdb_db2.h"
+#include "kdb_xdr.h"
+#include "policy_db.h"
+
+#define KDB_DB2_DATABASE_NAME "database_name"
+
+#define OLD_COMPAT_VERSION_1
+
+#ifdef OLD_COMPAT_VERSION_1
+#include "kdb_compat.h"
+#endif
+
+#include "kdb_db2.h"
+
+static char *gen_dbsuffix(char *, char *);
+
+static krb5_error_code krb5_db2_db_start_update(krb5_context);
+static krb5_error_code krb5_db2_db_end_update(krb5_context);
+
+krb5_error_code krb5_db2_db_set_name(krb5_context, char *);
+
+krb5_error_code krb5_db2_db_lock(krb5_context, int);
+
+static krb5_error_code krb5_db2_db_set_hashfirst(krb5_context, int);
+
+static char default_db_name[] = DEFAULT_KDB_FILE;
+krb5_set_err_func_t krb5_db2_dal_err_funcp = NULL;
+
+/*
+ * Locking:
+ *
+ * There are two distinct locking protocols used.  One is designed to
+ * lock against processes (the admin_server, for one) which make
+ * incremental changes to the database; the other is designed to lock
+ * against utilities (kdb5_edit, kpropd, kdb5_convert) which replace the
+ * entire database in one fell swoop.
+ *
+ * The first locking protocol is implemented using flock() in the
+ * krb_dbl_lock() and krb_dbl_unlock routines.
+ *
+ * The second locking protocol is necessary because DBM "files" are
+ * actually implemented as two separate files, and it is impossible to
+ * atomically rename two files simultaneously.  It assumes that the
+ * database is replaced only very infrequently in comparison to the time
+ * needed to do a database read operation.
+ *
+ * A third file is used as a "version" semaphore; the modification
+ * time of this file is the "version number" of the database.
+ * At the start of a read operation, the reader checks the version
+ * number; at the end of the read operation, it checks again.  If the
+ * version number changed, or if the semaphore was nonexistant at
+ * either time, the reader sleeps for a second to let things
+ * stabilize, and then tries again; if it does not succeed after
+ * KRB5_DBM_MAX_RETRY attempts, it gives up.
+ *
+ * On update, the semaphore file is deleted (if it exists) before any
+ * update takes place; at the end of the update, it is replaced, with
+ * a version number strictly greater than the version number which
+ * existed at the start of the update.
+ *
+ * If the system crashes in the middle of an update, the semaphore
+ * file is not automatically created on reboot; this is a feature, not
+ * a bug, since the database may be inconsistant.  Note that the
+ * absence of a semaphore file does not prevent another _update_ from
+ * taking place later.  Database replacements take place automatically
+ * only on slave servers; a crash in the middle of an update will be
+ * fixed by the next slave propagation.  A crash in the middle of an
+ * update on the master would be somewhat more serious, but this would
+ * likely be noticed by an administrator, who could fix the problem and
+ * retry the operation.
+ */
+
+#define free_dbsuffix(name) free(name)
+
+/*
+ * Routines to deal with context.
+ */
+#define	k5db2_inited(c)	(c && c->db_context \
+			 && ((kdb5_dal_handle*)c->db_context)->db_context \
+                         && ((krb5_db2_context *) ((kdb5_dal_handle*)c->db_context)->db_context)->db_inited)
+
+static krb5_error_code
+krb5_db2_get_db_opt(char *input, char **opt, char **val)
+{
+    char   *pos = strchr(input, '=');
+    if (pos == NULL) {
+	*opt = NULL;
+	*val = strdup(input);
+	if (*val == NULL) {
+	    return ENOMEM;
+	}
+    } else {
+	*opt = malloc((pos - input) + 1);
+	*val = strdup(pos + 1);
+	if (!*opt || !*val) {
+	    return ENOMEM;
+	}
+	memcpy(*opt, input, pos - input);
+	(*opt)[pos - input] = '\0';
+    }
+    return (0);
+
+}
+
+/*
+ * Restore the default context.
+ */
+static void
+k5db2_clear_context(krb5_db2_context *dbctx)
+{
+    /*
+     * Free any dynamically allocated memory.  File descriptors and locks
+     * are the caller's problem.
+     */
+    if (dbctx->db_lf_name)
+	free(dbctx->db_lf_name);
+    if (dbctx->db_name && (dbctx->db_name != default_db_name))
+	free(dbctx->db_name);
+    /*
+     * Clear the structure and reset the defaults.
+     */
+    memset((char *) dbctx, 0, sizeof(krb5_db2_context));
+    dbctx->db_name = default_db_name;
+    dbctx->db_nb_locks = FALSE;
+}
+
+static krb5_error_code
+k5db2_init_context(krb5_context context)
+{
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+
+    if (dal_handle->db_context == NULL) {
+	db_ctx = (krb5_db2_context *) malloc(sizeof(krb5_db2_context));
+	if (db_ctx == NULL)
+	    return ENOMEM;
+	else {
+	    memset((char *) db_ctx, 0, sizeof(krb5_db2_context));
+	    k5db2_clear_context((krb5_db2_context *) db_ctx);
+	    dal_handle->db_context = (void *) db_ctx;
+	}
+    }
+    return (0);
+}
+
+/*
+ * Utility routine: generate name of database file.
+ */
+
+static char *
+gen_dbsuffix(char *db_name, char *sfx)
+{
+    char   *dbsuffix;
+
+    if (sfx == NULL)
+	return ((char *) NULL);
+
+    dbsuffix = malloc(strlen(db_name) + strlen(sfx) + 1);
+    if (!dbsuffix)
+	return (0);
+    (void) strcpy(dbsuffix, db_name);
+    (void) strcat(dbsuffix, sfx);
+    return dbsuffix;
+}
+
+static DB *
+k5db2_dbopen(krb5_db2_context *dbc, char *fname, int flags, int mode)
+{
+    DB     *db;
+    BTREEINFO bti;
+    HASHINFO hashi;
+
+    bti.flags = 0;
+    bti.cachesize = 0;
+    bti.psize = 4096;
+    bti.lorder = 0;
+    bti.minkeypage = 0;
+    bti.compare = NULL;
+    bti.prefix = NULL;
+
+    hashi.bsize = 4096;
+    hashi.cachesize = 0;
+    hashi.ffactor = 40;
+    hashi.hash = NULL;
+    hashi.lorder = 0;
+    hashi.nelem = 1;
+
+    db = dbopen(fname, flags, mode,
+		dbc->hashfirst ? DB_HASH : DB_BTREE,
+		dbc->hashfirst ? (void *) &hashi : (void *) &bti);
+    if (db != NULL)
+	return db;
+    switch (errno) {
+#ifdef EFTYPE
+    case EFTYPE:
+#endif
+    case EINVAL:
+	db = dbopen(fname, flags, mode,
+		    dbc->hashfirst ? DB_BTREE : DB_HASH,
+		    dbc->hashfirst ? (void *) &bti : (void *) &hashi);
+	if (db != NULL)
+	    dbc->hashfirst = !dbc->hashfirst;
+    default:
+	return db;
+    }
+}
+
+static krb5_error_code
+krb5_db2_db_set_hashfirst(krb5_context context, int hashfirst)
+{
+    krb5_db2_context *dbc;
+    kdb5_dal_handle *dal_handle;
+
+    if (k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    dbc = (krb5_db2_context *) dal_handle->db_context;
+    dbc->hashfirst = hashfirst;
+    return 0;
+}
+
+/*
+ * initialization for data base routines.
+ */
+
+krb5_error_code
+krb5_db2_db_init(krb5_context context)
+{
+    char   *filename = NULL;
+    krb5_db2_context *db_ctx;
+    krb5_error_code retval;
+    kdb5_dal_handle *dal_handle;
+    char    policy_db_name[1024], policy_lock_name[1024];
+
+    if (k5db2_inited(context))
+	return 0;
+
+    /* Check for presence of our context, if not present, allocate one. */
+    if ((retval = k5db2_init_context(context)))
+	return (retval);
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = dal_handle->db_context;
+    db_ctx->db = NULL;
+
+    if (!(filename = gen_dbsuffix(db_ctx->db_name, KDB2_LOCK_EXT)))
+	return ENOMEM;
+    db_ctx->db_lf_name = filename;	/* so it gets freed by clear_context */
+
+    /*
+     * should be opened read/write so that write locking can work with
+     * POSIX systems
+     */
+    if ((db_ctx->db_lf_file = open(filename, O_RDWR, 0666)) < 0) {
+	if ((db_ctx->db_lf_file = open(filename, O_RDONLY, 0666)) < 0) {
+	    retval = errno;
+	    goto err_out;
+	}
+    }
+    db_ctx->db_inited++;
+
+    if ((retval = krb5_db2_db_get_age(context, NULL, &db_ctx->db_lf_time)))
+	goto err_out;
+
+    sprintf(policy_db_name, "%s.kadm5", db_ctx->db_name);
+    sprintf(policy_lock_name, "%s.lock", policy_db_name);
+
+    if ((retval = osa_adb_init_db(&db_ctx->policy_db, policy_db_name,
+				  policy_lock_name, OSA_ADB_POLICY_DB_MAGIC)))
+    {
+	goto err_out;
+    }
+    return 0;
+
+  err_out:
+    db_ctx->db = NULL;
+    k5db2_clear_context(db_ctx);
+    return (retval);
+}
+
+/*
+ * gracefully shut down database--must be called by ANY program that does
+ * a krb5_db2_db_init
+ */
+krb5_error_code
+krb5_db2_db_fini(krb5_context context)
+{
+    krb5_error_code retval = 0;
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    if (dal_handle == NULL) {
+	return 0;
+    }
+
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+
+    if (k5db2_inited(context)) {
+	if (close(db_ctx->db_lf_file))
+	    retval = errno;
+	else
+	    retval = 0;
+    }
+    if (db_ctx) {
+	if (db_ctx->policy_db) {
+	    retval =
+		osa_adb_fini_db(db_ctx->policy_db, OSA_ADB_POLICY_DB_MAGIC);
+	    if (retval)
+		return retval;
+	}
+
+	k5db2_clear_context(db_ctx);
+	/*      free(dal_handle->db_context); */
+	dal_handle->db_context = NULL;
+    }
+    return retval;
+}
+
+/*
+ * Set/Get the master key associated with the database
+ */
+krb5_error_code
+krb5_db2_db_set_mkey(krb5_context context, krb5_keyblock *key)
+{
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+
+    if (!k5db2_inited(context))
+	return (KRB5_KDB_DBNOTINITED);
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = dal_handle->db_context;
+    db_ctx->db_master_key = key;
+    return 0;
+}
+
+krb5_error_code
+krb5_db2_db_get_mkey(krb5_context context, krb5_keyblock **key)
+{
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+
+    if (!k5db2_inited(context))
+	return (KRB5_KDB_DBNOTINITED);
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = dal_handle->db_context;
+    *key = db_ctx->db_master_key;
+
+    return 0;
+}
+
+/*
+ * Set the "name" of the current database to some alternate value.
+ *
+ * Passing a null pointer as "name" will set back to the default.
+ * If the alternate database doesn't exist, nothing is changed.
+ *
+ * XXX rethink this
+ */
+
+krb5_error_code
+krb5_db2_db_set_name(krb5_context context, char *name)
+{
+    DB     *db;
+    krb5_db2_context *db_ctx;
+    krb5_error_code kret;
+    kdb5_dal_handle *dal_handle;
+
+    if (k5db2_inited(context))
+	return KRB5_KDB_DBINITED;
+
+    /* Check for presence of our context, if not present, allocate one. */
+    if ((kret = k5db2_init_context(context)))
+	return (kret);
+
+    if (name == NULL)
+	name = default_db_name;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = dal_handle->db_context;
+    db = k5db2_dbopen(db_ctx, name, O_RDONLY, 0);
+    if (db == NULL)
+	return errno;
+
+    db_ctx->db_name = strdup(name);
+    (*db->close) (db);
+    return 0;
+}
+
+/*
+ * Return the last modification time of the database.
+ *
+ * Think about using fstat.
+ */
+
+krb5_error_code
+krb5_db2_db_get_age(krb5_context context, char *db_name, time_t *age)
+{
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+    struct stat st;
+
+    if (!k5db2_inited(context))
+	return (KRB5_KDB_DBNOTINITED);
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+
+    if (fstat(db_ctx->db_lf_file, &st) < 0)
+	*age = -1;
+    else
+	*age = st.st_mtime;
+    return 0;
+}
+
+/*
+ * Remove the semaphore file; indicates that database is currently
+ * under renovation.
+ *
+ * This is only for use when moving the database out from underneath
+ * the server (for example, during slave updates).
+ */
+
+static krb5_error_code
+krb5_db2_db_start_update(krb5_context context)
+{
+    return 0;
+}
+
+static krb5_error_code
+krb5_db2_db_end_update(krb5_context context)
+{
+    krb5_error_code retval;
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+    struct stat st;
+    time_t  now;
+    struct utimbuf utbuf;
+
+    if (!k5db2_inited(context))
+	return (KRB5_KDB_DBNOTINITED);
+
+    retval = 0;
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = dal_handle->db_context;
+    now = time((time_t *) NULL);
+    if (fstat(db_ctx->db_lf_file, &st) == 0) {
+	if (st.st_mtime >= now) {
+	    utbuf.actime = st.st_mtime + 1;
+	    utbuf.modtime = st.st_mtime + 1;
+	    if (utime(db_ctx->db_lf_name, &utbuf))
+		retval = errno;
+	} else {
+	    if (utime(db_ctx->db_lf_name, (struct utimbuf *) NULL))
+		retval = errno;
+	}
+    } else
+	retval = errno;
+    if (!retval) {
+	if (fstat(db_ctx->db_lf_file, &st) == 0)
+	    db_ctx->db_lf_time = st.st_mtime;
+	else
+	    retval = errno;
+    }
+    return (retval);
+}
+
+#define MAX_LOCK_TRIES 5
+
+krb5_error_code
+krb5_db2_db_lock(krb5_context context, int in_mode)
+{
+    krb5_db2_context *db_ctx;
+    int     krb5_lock_mode;
+    DB     *db;
+    krb5_error_code retval;
+    time_t  mod_time;
+    kdb5_dal_handle *dal_handle;
+    int     mode, gotlock, tries;
+
+    switch (in_mode) {
+    case KRB5_DB_LOCKMODE_PERMANENT:
+	mode = KRB5_DB_LOCKMODE_EXCLUSIVE;
+	break;
+    case KRB5_DB_LOCKMODE_EXCLUSIVE:
+	mode = KRB5_LOCKMODE_EXCLUSIVE;
+	break;
+
+    case KRB5_DB_LOCKMODE_SHARED:
+	mode = KRB5_LOCKMODE_SHARED;
+	break;
+    default:
+	return EINVAL;
+    }
+
+    if (!k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+    if (db_ctx->db_locks_held && (db_ctx->db_lock_mode >= mode)) {
+	/* No need to upgrade lock, just return */
+	db_ctx->db_locks_held++;
+	goto policy_lock;
+    }
+
+    if ((mode != KRB5_LOCKMODE_SHARED) && (mode != KRB5_LOCKMODE_EXCLUSIVE))
+	return KRB5_KDB_BADLOCKMODE;
+
+    krb5_lock_mode = mode | KRB5_LOCKMODE_DONTBLOCK;
+    for (gotlock = tries = 0; tries < MAX_LOCK_TRIES; tries++) {
+	retval = krb5_lock_file(context, db_ctx->db_lf_file, krb5_lock_mode);
+	if (retval == 0) {
+	    gotlock++;
+	    break;
+	} else if (retval == EBADF && mode == KRB5_DB_LOCKMODE_EXCLUSIVE)
+	    /* tried to exclusive-lock something we don't have */
+	    /* write access to */
+	    return KRB5_KDB_CANTLOCK_DB;
+	sleep(1);
+    }
+    if (retval == EACCES)
+	return KRB5_KDB_CANTLOCK_DB;
+    else if (retval == EAGAIN || retval == EWOULDBLOCK)
+	return OSA_ADB_CANTLOCK_DB;
+    else if (retval != 0)
+	return retval;
+
+    if ((retval = krb5_db2_db_get_age(context, NULL, &mod_time)))
+	goto lock_error;
+
+    db = k5db2_dbopen(db_ctx, db_ctx->db_name,
+		      mode == KRB5_LOCKMODE_SHARED ? O_RDONLY : O_RDWR, 0600);
+    if (db) {
+	db_ctx->db_lf_time = mod_time;
+	db_ctx->db = db;
+    } else {
+	retval = errno;
+	db_ctx->db = NULL;
+	goto lock_error;
+    }
+
+    db_ctx->db_lock_mode = mode;
+    db_ctx->db_locks_held++;
+
+  policy_lock:
+    if ((retval = osa_adb_get_lock(db_ctx->policy_db, in_mode))) {
+	krb5_db2_db_unlock(context);
+    }
+    return retval;
+
+  lock_error:;
+    db_ctx->db_lock_mode = 0;
+    db_ctx->db_locks_held = 0;
+    krb5_db2_db_unlock(context);
+    return retval;
+}
+
+krb5_error_code
+krb5_db2_db_unlock(krb5_context context)
+{
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+    DB     *db;
+    krb5_error_code retval;
+
+    if (!k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+
+    if ((retval = osa_adb_release_lock(db_ctx->policy_db))) {
+	return retval;
+    }
+
+    if (!db_ctx->db_locks_held)	/* lock already unlocked */
+	return KRB5_KDB_NOTLOCKED;
+    db = db_ctx->db;
+    if (--(db_ctx->db_locks_held) == 0) {
+	(*db->close) (db);
+	db_ctx->db = NULL;
+
+	retval = krb5_lock_file(context, db_ctx->db_lf_file,
+				KRB5_LOCKMODE_UNLOCK);
+	db_ctx->db_lock_mode = 0;
+	return (retval);
+    }
+    return 0;
+}
+
+/*
+ * Create the database, assuming it's not there.
+ */
+krb5_error_code
+krb5_db2_db_create(krb5_context context, char *db_name, krb5_int32 flags)
+{
+    register krb5_error_code retval = 0;
+    kdb5_dal_handle *dal_handle;
+    char   *okname;
+    int     fd;
+    krb5_db2_context *db_ctx;
+    DB     *db;
+    char    policy_db_name[1024], policy_lock_name[1024];
+
+    if ((retval = k5db2_init_context(context)))
+	return (retval);
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+    switch (flags) {
+    case KRB5_KDB_CREATE_HASH:
+	if ((retval = krb5_db2_db_set_hashfirst(context, TRUE)))
+	    return retval;
+	break;
+    case KRB5_KDB_CREATE_BTREE:
+    case 0:
+	if ((retval = krb5_db2_db_set_hashfirst(context, FALSE)))
+	    return retval;
+	break;
+    default:
+	return KRB5_KDB_BAD_CREATEFLAGS;
+    }
+    db = k5db2_dbopen(db_ctx, db_name, O_RDWR | O_CREAT | O_EXCL, 0600);
+    if (db == NULL)
+	retval = errno;
+    else
+	(*db->close) (db);
+    if (retval == 0) {
+	okname = gen_dbsuffix(db_name, KDB2_LOCK_EXT);
+	if (!okname)
+	    retval = ENOMEM;
+	else {
+	    fd = open(okname, O_CREAT | O_RDWR | O_TRUNC, 0600);
+	    if (fd < 0)
+		retval = errno;
+	    else
+		close(fd);
+	    free_dbsuffix(okname);
+	}
+    }
+
+    sprintf(policy_db_name, "%s.kadm5", db_name);
+    sprintf(policy_lock_name, "%s.lock", policy_db_name);
+
+    retval = osa_adb_create_db(policy_db_name,
+			       policy_lock_name, OSA_ADB_POLICY_DB_MAGIC);
+
+    return retval;
+}
+
+/*
+ * Destroy the database.  Zero's out all of the files, just to be sure.
+ */
+static krb5_error_code
+destroy_file_suffix(char *dbname, char *suffix)
+{
+    char   *filename;
+    struct stat statb;
+    int     nb, fd;
+    unsigned int j;
+    off_t   pos;
+    char    buf[BUFSIZ];
+    char    zbuf[BUFSIZ];
+    int     dowrite;
+
+    filename = gen_dbsuffix(dbname, suffix);
+    if (filename == 0)
+	return ENOMEM;
+    if ((fd = open(filename, O_RDWR, 0)) < 0) {
+	free(filename);
+	return errno;
+    }
+    /* fstat() will probably not fail unless using a remote filesystem
+     * (which is inappropriate for the kerberos database) so this check
+     * is mostly paranoia.  */
+    if (fstat(fd, &statb) == -1) {
+	int     retval = errno;
+	free(filename);
+	return retval;
+    }
+    /*
+     * Stroll through the file, reading in BUFSIZ chunks.  If everything
+     * is zero, then we're done for that block, otherwise, zero the block.
+     * We would like to just blast through everything, but some DB
+     * implementations make holey files and writing data to the holes
+     * causes actual blocks to be allocated which is no good, since
+     * we're just about to unlink it anyways.
+     */
+    memset(zbuf, 0, BUFSIZ);
+    pos = 0;
+    while (pos < statb.st_size) {
+	dowrite = 0;
+	nb = read(fd, buf, BUFSIZ);
+	if (nb < 0) {
+	    int     retval = errno;
+	    free(filename);
+	    return retval;
+	}
+	for (j = 0; j < nb; j++) {
+	    if (buf[j] != '\0') {
+		dowrite = 1;
+		break;
+	    }
+	}
+	/* For signedness */
+	j = nb;
+	if (dowrite) {
+	    lseek(fd, pos, SEEK_SET);
+	    nb = write(fd, zbuf, j);
+	    if (nb < 0) {
+		int     retval = errno;
+		free(filename);
+		return retval;
+	    }
+	}
+	pos += nb;
+    }
+    /* ??? Is fsync really needed?  I don't know of any non-networked
+     * filesystem which will discard queued writes to disk if a file
+     * is deleted after it is closed.  --jfc */
+#ifndef NOFSYNC
+    fsync(fd);
+#endif
+    close(fd);
+
+    if (unlink(filename)) {
+	free(filename);
+	return (errno);
+    }
+    free(filename);
+    return (0);
+}
+
+/*
+ * Since the destroy operation happens outside the init/fini bracket, we
+ * have some tomfoolery to undergo here.  If we're operating under no
+ * database context, then we initialize with the default.  If the caller
+ * wishes a different context (e.g. different dispatch table), it's their
+ * responsibility to call kdb5_db_set_dbops() before this call.  That will
+ * set up the right dispatch table values (e.g. name extensions).
+ *
+ * Not quite valid due to ripping out of dbops...
+ */
+krb5_error_code
+krb5_db2_db_destroy(krb5_context context, char *dbname)
+{
+    krb5_error_code retval1, retval2;
+    krb5_boolean tmpcontext;
+    char    policy_db_name[1024], policy_lock_name[1024];
+
+    tmpcontext = 0;
+    if (!context->db_context
+	|| !((kdb5_dal_handle *) context->db_context)->db_context) {
+	tmpcontext = 1;
+	if ((retval1 = k5db2_init_context(context)))
+	    return (retval1);
+    }
+
+    retval1 = retval2 = 0;
+    retval1 = destroy_file_suffix(dbname, "");
+    retval2 = destroy_file_suffix(dbname, KDB2_LOCK_EXT);
+
+    if (tmpcontext) {
+	k5db2_clear_context((krb5_db2_context *) ((kdb5_dal_handle *) context->
+						  db_context)->db_context);
+	free(((kdb5_dal_handle *) context->db_context)->db_context);
+	((kdb5_dal_handle *) context->db_context)->db_context = NULL;
+    }
+
+    if (retval1 || retval2)
+	return (retval1 ? retval1 : retval2);
+
+    sprintf(policy_db_name, "%s.kadm5", dbname);
+    sprintf(policy_lock_name, "%s.lock", policy_db_name);
+
+    retval1 = osa_adb_destroy_db(policy_db_name,
+				 policy_lock_name, OSA_ADB_POLICY_DB_MAGIC);
+
+    return retval1;
+}
+
+/*
+ * look up a principal in the data base.
+ * returns number of entries found, and whether there were
+ * more than requested.
+ */
+
+krb5_error_code
+krb5_db2_db_get_principal(krb5_context context,
+			  krb5_const_principal searchfor,
+			  krb5_db_entry *entries, /* filled in */
+			  int *nentries, /* how much room/how many found */
+			  krb5_boolean *more) /* are there more? */
+{
+    krb5_db2_context *db_ctx;
+    krb5_error_code retval;
+    DB     *db;
+    DBT     key, contents;
+    krb5_data keydata, contdata;
+    int     trynum, dbret;
+    kdb5_dal_handle *dal_handle;
+
+    *more = FALSE;
+    *nentries = 0;
+
+    if (!k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+
+    for (trynum = 0; trynum < KRB5_DB2_MAX_RETRY; trynum++) {
+	if ((retval = krb5_db2_db_lock(context, KRB5_LOCKMODE_SHARED))) {
+	    if (db_ctx->db_nb_locks)
+		return (retval);
+	    sleep(1);
+	    continue;
+	}
+	break;
+    }
+    if (trynum == KRB5_DB2_MAX_RETRY)
+	return KRB5_KDB_DB_INUSE;
+
+    /* XXX deal with wildcard lookups */
+    retval = krb5_encode_princ_dbkey(context, &keydata, searchfor);
+    if (retval)
+	goto cleanup;
+    key.data = keydata.data;
+    key.size = keydata.length;
+
+    db = db_ctx->db;
+    dbret = (*db->get) (db, &key, &contents, 0);
+    retval = errno;
+    krb5_free_data_contents(context, &keydata);
+    switch (dbret) {
+    case 1:
+	retval = 0;
+    case -1:
+    default:
+	*nentries = 0;
+	goto cleanup;
+    case 0:
+	contdata.data = contents.data;
+	contdata.length = contents.size;
+	retval = krb5_decode_princ_contents(context, &contdata, entries);
+	if (!retval)
+	    *nentries = 1;
+	break;
+    }
+
+  cleanup:
+    (void) krb5_db2_db_unlock(context);	/* unlock read lock */
+    return retval;
+}
+
+/*
+  Free stuff returned by krb5_db2_db_get_principal.
+ */
+krb5_error_code
+krb5_db2_db_free_principal(krb5_context context, krb5_db_entry *entries,
+			   int nentries)
+{
+    register int i;
+    for (i = 0; i < nentries; i++)
+	krb5_dbe_free_contents(context, &entries[i]);
+    return 0;
+}
+
+/*
+  Stores the *"nentries" entry structures pointed to by "entries" in the
+  database.
+
+  *"nentries" is updated upon return to reflect the number of records
+  acutally stored; the first *"nstored" records will have been stored in the
+  database (even if an error occurs).
+
+ */
+
+krb5_error_code
+krb5_db2_db_put_principal(krb5_context context,
+			  krb5_db_entry *entries,
+			  int *nentries, /* number of entry structs to update */
+			  char **db_args)
+{
+    int     i, n, dbret;
+    DB     *db;
+    DBT     key, contents;
+    krb5_data contdata, keydata;
+    krb5_error_code retval;
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+
+    if (db_args) {
+	/* DB2 does not support db_args DB arguments for principal */
+	char    buf[KRB5_MAX_ERR_STR];
+	sprintf(buf, "Unsupported argument \"%s\" for db2", db_args[0]);
+	krb5_db2_dal_err_funcp(context, krb5_err_have_str, EINVAL, buf);
+	return EINVAL;
+    }
+
+    n = *nentries;
+    *nentries = 0;
+    if (!k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+    if ((retval = krb5_db2_db_lock(context, KRB5_LOCKMODE_EXCLUSIVE)))
+	return retval;
+
+    db = db_ctx->db;
+    if ((retval = krb5_db2_db_start_update(context))) {
+	(void) krb5_db2_db_unlock(context);
+	return retval;
+    }
+
+    /* for each one, stuff temps, and do replace/append */
+    for (i = 0; i < n; i++) {
+	retval = krb5_encode_princ_contents(context, &contdata, entries);
+	if (retval)
+	    break;
+	contents.data = contdata.data;
+	contents.size = contdata.length;
+	retval = krb5_encode_princ_dbkey(context, &keydata, entries->princ);
+	if (retval) {
+	    krb5_free_data_contents(context, &contdata);
+	    break;
+	}
+
+	key.data = keydata.data;
+	key.size = keydata.length;
+	dbret = (*db->put) (db, &key, &contents, 0);
+	retval = dbret ? errno : 0;
+	krb5_free_data_contents(context, &keydata);
+	krb5_free_data_contents(context, &contdata);
+	if (retval)
+	    break;
+	entries++;		/* bump to next struct */
+    }
+
+    (void) krb5_db2_db_end_update(context);
+    (void) krb5_db2_db_unlock(context);	/* unlock database */
+    *nentries = i;
+    return (retval);
+}
+
+/*
+ * delete a principal from the data base.
+ * returns number of entries removed
+ */
+
+krb5_error_code
+krb5_db2_db_delete_principal(krb5_context context,
+			     krb5_const_principal searchfor,
+			     int *nentries) /* how many found & deleted */
+{
+    krb5_error_code retval;
+    krb5_db_entry entry;
+    krb5_db2_context *db_ctx;
+    DB     *db;
+    DBT     key, contents;
+    krb5_data keydata, contdata;
+    int     i, dbret;
+    kdb5_dal_handle *dal_handle;
+
+    if (!k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+    if ((retval = krb5_db2_db_lock(context, KRB5_LOCKMODE_EXCLUSIVE)))
+	return (retval);
+
+    if ((retval = krb5_db2_db_start_update(context))) {
+	(void) krb5_db2_db_unlock(context);	/* unlock write lock */
+	return (retval);
+    }
+
+    if ((retval = krb5_encode_princ_dbkey(context, &keydata, searchfor)))
+	goto cleanup;
+    key.data = keydata.data;
+    key.size = keydata.length;
+
+    db = db_ctx->db;
+    dbret = (*db->get) (db, &key, &contents, 0);
+    retval = errno;
+    switch (dbret) {
+    case 1:
+	retval = KRB5_KDB_NOENTRY;
+    case -1:
+    default:
+	*nentries = 0;
+	goto cleankey;
+    case 0:
+	;
+    }
+    memset((char *) &entry, 0, sizeof(entry));
+    contdata.data = contents.data;
+    contdata.length = contents.size;
+    retval = krb5_decode_princ_contents(context, &contdata, &entry);
+    if (retval)
+	goto cleankey;
+    *nentries = 1;
+
+    /* Clear encrypted key contents */
+    for (i = 0; i < entry.n_key_data; i++) {
+	if (entry.key_data[i].key_data_length[0]) {
+	    memset((char *) entry.key_data[i].key_data_contents[0], 0,
+		   (unsigned) entry.key_data[i].key_data_length[0]);
+	}
+    }
+
+    retval = krb5_encode_princ_contents(context, &contdata, &entry);
+    krb5_dbe_free_contents(context, &entry);
+    if (retval)
+	goto cleankey;
+
+    contents.data = contdata.data;
+    contents.size = contdata.length;
+    dbret = (*db->put) (db, &key, &contents, 0);
+    retval = dbret ? errno : 0;
+    krb5_free_data_contents(context, &contdata);
+    if (retval)
+	goto cleankey;
+    dbret = (*db->del) (db, &key, 0);
+    retval = dbret ? errno : 0;
+  cleankey:
+    krb5_free_data_contents(context, &keydata);
+
+  cleanup:
+    (void) krb5_db2_db_end_update(context);
+    (void) krb5_db2_db_unlock(context);	/* unlock write lock */
+    return retval;
+}
+
+krb5_error_code
+krb5_db2_db_iterate_ext(krb5_context context,
+			krb5_error_code(*func) (krb5_pointer, krb5_db_entry *),
+			krb5_pointer func_arg,
+			int backwards, int recursive)
+{
+    krb5_db2_context *db_ctx;
+    DB     *db;
+    DBT     key, contents;
+    krb5_data contdata;
+    krb5_db_entry entries;
+    krb5_error_code retval;
+    kdb5_dal_handle *dal_handle;
+    int     dbret;
+    void   *cookie;
+
+    cookie = NULL;
+    if (!k5db2_inited(context))
+	return KRB5_KDB_DBNOTINITED;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    db_ctx = (krb5_db2_context *) dal_handle->db_context;
+    retval = krb5_db2_db_lock(context, KRB5_LOCKMODE_SHARED);
+
+    if (retval)
+	return retval;
+
+    db = db_ctx->db;
+    if (recursive && db->type != DB_BTREE) {
+	(void) krb5_db2_db_unlock(context);
+	return KRB5_KDB_UK_RERROR;	/* Not optimal, but close enough. */
+    }
+
+    if (!recursive) {
+	dbret = (*db->seq) (db, &key, &contents, backwards ? R_LAST : R_FIRST);
+    } else {
+#ifdef HAVE_BT_RSEQ
+	dbret = bt_rseq(db, &key, &contents, &cookie,
+			backwards ? R_LAST : R_FIRST);
+#else
+	(void) krb5_db2_db_unlock(context);
+	return KRB5_KDB_UK_RERROR;	/* Not optimal, but close enough. */
+#endif
+    }
+    while (dbret == 0) {
+	contdata.data = contents.data;
+	contdata.length = contents.size;
+	retval = krb5_decode_princ_contents(context, &contdata, &entries);
+	if (retval)
+	    break;
+	retval = (*func) (func_arg, &entries);
+	krb5_dbe_free_contents(context, &entries);
+	if (retval)
+	    break;
+	if (!recursive) {
+	    dbret = (*db->seq) (db, &key, &contents,
+				backwards ? R_PREV : R_NEXT);
+	} else {
+#ifdef HAVE_BT_RSEQ
+	    dbret = bt_rseq(db, &key, &contents, &cookie,
+			    backwards ? R_PREV : R_NEXT);
+#else
+	    (void) krb5_db2_db_unlock(context);
+	    return KRB5_KDB_UK_RERROR;	/* Not optimal, but close enough. */
+#endif
+	}
+    }
+    switch (dbret) {
+    case 1:
+    case 0:
+	break;
+    case -1:
+    default:
+	retval = errno;
+    }
+    (void) krb5_db2_db_unlock(context);
+    return retval;
+}
+
+krb5_error_code
+krb5_db2_db_iterate(krb5_context context,
+		    char *match_expr,
+		    krb5_error_code(*func) (krb5_pointer, krb5_db_entry *),
+		    krb5_pointer func_arg)
+{
+    return krb5_db2_db_iterate_ext(context, func, func_arg, 0, 0);
+}
+
+krb5_boolean
+krb5_db2_db_set_lockmode(krb5_context context, krb5_boolean mode)
+{
+    krb5_boolean old;
+    krb5_db2_context *db_ctx;
+    kdb5_dal_handle *dal_handle;
+
+    dal_handle = (kdb5_dal_handle *) context->db_context;
+    old = mode;
+    if (dal_handle && (db_ctx = (krb5_db2_context *) dal_handle->db_context)) {
+	old = db_ctx->db_nb_locks;
+	db_ctx->db_nb_locks = mode;
+    }
+    return old;
+}
+
+/*
+ *     DAL API functions
+ */
+krb5_error_code
+krb5_db2_lib_init(krb5_set_err_func_t set_err)
+{
+    krb5_db2_dal_err_funcp = set_err;
+    return 0;
+}
+
+krb5_error_code
+krb5_db2_lib_cleanup()
+{
+    /* right now, no cleanup required */
+    return 0;
+}
+
+krb5_error_code
+krb5_db2_open(krb5_context kcontext,
+	      char *conf_section, char **db_args, int mode)
+{
+    krb5_error_code status = 0;
+    char  **t_ptr = db_args;
+    char    db_name_set = 0;
+
+    if (k5db2_inited(kcontext))
+	return 0;
+
+    while (t_ptr && *t_ptr) {
+	char   *opt = NULL, *val = NULL;
+
+	krb5_db2_get_db_opt(*t_ptr, &opt, &val);
+	if (opt && !strcmp(opt, "dbname")) {
+	    status = krb5_db2_db_set_name(kcontext, val);
+	    if (status) {
+		free(opt);
+		free(val);
+		goto clean_n_exit;
+	    }
+	    db_name_set = 1;
+	}
+	/* ignore hash argument. Might have been passed from create */
+	else if (!opt || strcmp(opt, "hash")) {
+	    char    buf[KRB5_MAX_ERR_STR];
+	    sprintf(buf, "Unsupported argument \"%s\" for db2",
+		    opt ? opt : val);
+	    krb5_db2_dal_err_funcp(kcontext, krb5_err_have_str, EINVAL, buf);
+	    free(opt);
+	    free(val);
+	    return EINVAL;
+	}
+
+	free(opt);
+	free(val);
+	t_ptr++;
+    }
+
+    if (!db_name_set) {
+	char   *value = NULL;
+	status = profile_get_string(KRB5_DB_GET_PROFILE(kcontext), KDB_MODULE_SECTION, conf_section, KDB_DB2_DATABASE_NAME,	/* under given conf section */
+				    NULL, &value);
+
+	if (value == NULL) {
+	    /* special case for db2. We might actually be looking at old type config file where database is specified as part of realm */
+	    status = profile_get_string(KRB5_DB_GET_PROFILE(kcontext), KDB_REALM_SECTION, KRB5_DB_GET_REALM(kcontext), KDB_DB2_DATABASE_NAME,	/* under given realm */
+					default_db_name, &value);
+	    if (status) {
+		goto clean_n_exit;
+	    }
+	}
+
+	status = krb5_db2_db_set_name(kcontext, value);
+	profile_release_string(value);
+	if (status) {
+	    goto clean_n_exit;
+	}
+
+    }
+
+    status = krb5_db2_db_init(kcontext);
+
+  clean_n_exit:
+    return status;
+}
+
+krb5_error_code
+krb5_db2_create(krb5_context kcontext, char *conf_section, char **db_args)
+{
+    krb5_error_code status = 0;
+    char  **t_ptr = db_args;
+    char    db_name_set = 0;
+    krb5_int32 flags = KRB5_KDB_CREATE_BTREE;
+    char   *db_name = NULL;
+
+    if (k5db2_inited(kcontext))
+	return 0;
+
+    while (t_ptr && *t_ptr) {
+	char   *opt = NULL, *val = NULL;
+
+	krb5_db2_get_db_opt(*t_ptr, &opt, &val);
+	if (opt && !strcmp(opt, "dbname")) {
+	    db_name = strdup(val);
+	    status = krb5_db2_db_set_name(kcontext, val);
+	    if (!status) {
+		status = EEXIST;
+		free(opt);
+		free(val);
+		goto clean_n_exit;
+	    }
+	    db_name_set = 1;
+	}
+	/* ignore hash argument. Might have been passed from create */
+	else if (opt && !strcmp(opt, "hash")) {
+	    flags = KRB5_KDB_CREATE_HASH;
+	} else {
+	    char    buf[KRB5_MAX_ERR_STR];
+	    sprintf(buf, "Unsupported argument \"%s\" for db2",
+		    opt ? opt : val);
+	    krb5_db2_dal_err_funcp(kcontext, krb5_err_have_str, EINVAL, buf);
+	    free(opt);
+	    free(val);
+	    return EINVAL;
+	}
+
+	free(opt);
+	free(val);
+	t_ptr++;
+    }
+
+    if (!db_name_set) {
+	char   *value = NULL;
+	status = profile_get_string(KRB5_DB_GET_PROFILE(kcontext),
+				    KDB_MODULE_SECTION, conf_section,
+				    /* under given conf section */
+				    KDB_DB2_DATABASE_NAME, NULL, &value);
+
+	if (value == NULL) {
+	    /* Special case for db2.  We might actually be looking at
+	     * old type config file where database is specified as
+	     * part of realm.  */
+	    status = profile_get_string(KRB5_DB_GET_PROFILE(kcontext),
+					KDB_REALM_SECTION,
+					KRB5_DB_GET_REALM(kcontext),
+					/* under given realm */
+					KDB_DB2_DATABASE_NAME,
+					default_db_name, &value);
+	    if (status) {
+		goto clean_n_exit;
+	    }
+	}
+
+	db_name = strdup(value);
+	status = krb5_db2_db_set_name(kcontext, value);
+	profile_release_string(value);
+	if (!status) {
+	    status = EEXIST;
+	    goto clean_n_exit;
+	}
+
+    }
+
+    status = krb5_db2_db_create(kcontext, db_name, flags);
+    if (status)
+	goto clean_n_exit;
+    /* db2 has a problem of needing to close and open the database again. This removes that need */
+    status = krb5_db2_db_fini(kcontext);
+    if (status)
+	goto clean_n_exit;
+
+    status = krb5_db2_open(kcontext, conf_section, db_args, KRB5_KDB_OPEN_RW);
+
+  clean_n_exit:
+    if (db_name)
+	free(db_name);
+    return status;
+}
+
+krb5_error_code
+krb5_db2_destroy(krb5_context kcontext, char *conf_section, char **db_args)
+{
+    krb5_error_code status = 0;
+    char  **t_ptr = db_args;
+    char    db_name_set = 0;
+    char   *db_name = NULL;
+
+    while (t_ptr && *t_ptr) {
+	char   *opt = NULL, *val = NULL;
+
+	krb5_db2_get_db_opt(*t_ptr, &opt, &val);
+	if (opt && !strcmp(opt, "dbname")) {
+	    db_name = strdup(val);
+	    status = krb5_db2_db_set_name(kcontext, val);
+	    if (status) {
+		free(opt);
+		free(val);
+		goto clean_n_exit;
+	    }
+	    db_name_set = 1;
+	}
+	/* ignore hash argument. Might have been passed from create */
+	else if (!opt || strcmp(opt, "hash")) {
+	    free(opt);
+	    free(val);
+	    return EINVAL;
+	}
+
+	free(opt);
+	free(val);
+	t_ptr++;
+    }
+
+    if (!db_name_set) {
+	char   *value = NULL;
+	status = profile_get_string(KRB5_DB_GET_PROFILE(kcontext), KDB_MODULE_SECTION, conf_section, KDB_DB2_DATABASE_NAME,	/* under given conf section */
+				    NULL, &value);
+
+	if (value == NULL) {
+	    /* special case for db2. We might actually be looking at old type config file where database is specified as part of realm */
+	    status = profile_get_string(KRB5_DB_GET_PROFILE(kcontext), KDB_REALM_SECTION, KRB5_DB_GET_REALM(kcontext), KDB_DB2_DATABASE_NAME,	/* under given realm */
+					default_db_name, &value);
+	    if (status) {
+		goto clean_n_exit;
+	    }
+	}
+
+	db_name = strdup(value);
+	status = krb5_db2_db_set_name(kcontext, value);
+	profile_release_string(value);
+	if (status) {
+	    goto clean_n_exit;
+	}
+
+    }
+
+    status = krb5_db2_db_destroy(kcontext, db_name);
+
+  clean_n_exit:
+    if (db_name)
+	free(db_name);
+    return status;
+}
+
+krb5_error_code
+krb5_db2_set_master_key_ext(krb5_context kcontext,
+			    char *pwd, krb5_keyblock * key)
+{
+    return krb5_db2_db_set_mkey(kcontext, key);
+}
+
+krb5_error_code
+krb5_db2_db_set_option(krb5_context kcontext, int option, void *value)
+{
+    krb5_error_code status = 0;
+    krb5_boolean oldval;
+
+    switch (option) {
+    case KRB5_KDB_OPT_SET_DB_NAME:
+	status = krb5_db2_db_set_name(kcontext, (char *) value);
+	break;
+
+    case KRB5_KDB_OPT_SET_LOCK_MODE:
+	oldval = krb5_db2_db_set_lockmode(kcontext, *((krb5_boolean *) value));
+	*((krb5_boolean *) value) = oldval;
+	break;
+
+    default:
+	status = -1;		/* TBD */
+	break;
+    }
+
+    return status;
+}
+
+void   *
+krb5_db2_alloc(krb5_context kcontext, void *ptr, size_t size)
+{
+    return realloc(ptr, size);
+}
+
+void
+krb5_db2_free(krb5_context kcontext, void *ptr)
+{
+    free(ptr);
+}
+
+/* policy functions */
+krb5_error_code
+krb5_db2_create_policy(krb5_context kcontext, osa_policy_ent_t policy)
+{
+    kdb5_dal_handle *dal_handle;
+    krb5_db2_context *dbc;
+
+    dal_handle = (kdb5_dal_handle *) kcontext->db_context;
+    dbc = (krb5_db2_context *) dal_handle->db_context;
+
+    return osa_adb_create_policy(dbc->policy_db, policy);
+}
+
+krb5_error_code
+krb5_db2_get_policy(krb5_context kcontext,
+		    char *name, osa_policy_ent_t * policy, int *cnt)
+{
+    kdb5_dal_handle *dal_handle;
+    krb5_db2_context *dbc;
+
+    dal_handle = (kdb5_dal_handle *) kcontext->db_context;
+    dbc = (krb5_db2_context *) dal_handle->db_context;
+
+    return osa_adb_get_policy(dbc->policy_db, name, policy, cnt);
+}
+
+krb5_error_code
+krb5_db2_put_policy(krb5_context kcontext, osa_policy_ent_t policy)
+{
+    kdb5_dal_handle *dal_handle;
+    krb5_db2_context *dbc;
+
+    dal_handle = (kdb5_dal_handle *) kcontext->db_context;
+    dbc = (krb5_db2_context *) dal_handle->db_context;
+
+    return osa_adb_put_policy(dbc->policy_db, policy);
+}
+
+krb5_error_code
+krb5_db2_iter_policy(krb5_context kcontext,
+		     char *match_entry,
+		     osa_adb_iter_policy_func func, void *data)
+{
+    kdb5_dal_handle *dal_handle;
+    krb5_db2_context *dbc;
+
+    dal_handle = (kdb5_dal_handle *) kcontext->db_context;
+    dbc = (krb5_db2_context *) dal_handle->db_context;
+
+    return osa_adb_iter_policy(dbc->policy_db, func, data);
+}
+
+krb5_error_code
+krb5_db2_delete_policy(krb5_context kcontext, char *policy)
+{
+    kdb5_dal_handle *dal_handle;
+    krb5_db2_context *dbc;
+
+    dal_handle = (kdb5_dal_handle *) kcontext->db_context;
+    dbc = (krb5_db2_context *) dal_handle->db_context;
+
+    return osa_adb_destroy_policy(dbc->policy_db, policy);
+}
+
+void
+krb5_db2_free_policy(krb5_context kcontext, osa_policy_ent_t entry)
+{
+    osa_free_policy_ent(entry);
+}
diff --git a/src/plugins/kdb/db2/kdb_db2.h b/src/plugins/kdb/db2/kdb_db2.h
new file mode 100644
index 0000000000..ba03ea36f3
--- /dev/null
+++ b/src/plugins/kdb/db2/kdb_db2.h
@@ -0,0 +1,216 @@
+/*
+ * lib/kdb/kdb_db2.h
+ *
+ * Copyright 1997 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ *
+ * KDC Database backend definitions for Berkely DB.
+ */
+#ifndef KRB5_KDB_DB2_H
+#define KRB5_KDB_DB2_H
+
+#include "policy_db.h"
+
+typedef struct _krb5_db2_context {
+    krb5_boolean        db_inited;      /* Context initialized          */
+    char *              db_name;        /* Name of database             */
+    DB *		db;		/* DB handle			*/
+    krb5_boolean	hashfirst;	/* Try hash database type first	*/
+    char *              db_lf_name;     /* Name of lock file            */
+    int                 db_lf_file;     /* File descriptor of lock file */
+    time_t              db_lf_time;     /* Time last updated            */
+    int                 db_locks_held;  /* Number of times locked       */
+    int                 db_lock_mode;   /* Last lock mode, e.g. greatest*/
+    krb5_boolean        db_nb_locks;    /* [Non]Blocking lock modes     */
+    krb5_keyblock      *db_master_key;  /* Master key of database       */
+    osa_adb_policy_t    policy_db;
+} krb5_db2_context;
+
+#define KRB5_DB2_MAX_RETRY 5
+
+#define KDB2_LOCK_EXT ".ok"
+
+krb5_error_code krb5_db2_db_set_name 
+	(krb5_context,
+		   char * );
+krb5_error_code krb5_db2_db_init 
+	(krb5_context);
+krb5_error_code krb5_db2_db_fini 
+	(krb5_context);
+krb5_error_code krb5_db2_db_get_age 
+	(krb5_context,
+		   char *,
+		   time_t * );
+krb5_error_code krb5_db2_db_create 
+	(krb5_context,
+		   char *,
+		   krb5_int32);
+krb5_error_code krb5_db2_db_destroy 
+	(krb5_context,
+		   char * );
+krb5_error_code krb5_db2_db_rename 
+	(krb5_context,
+		   char *,
+		   char * );
+krb5_error_code krb5_db2_db_get_principal 
+	(krb5_context,
+		   krb5_const_principal,
+		   krb5_db_entry *,
+		   int *,
+		   krb5_boolean * );
+krb5_error_code krb5_db2_db_free_principal 
+	(krb5_context,
+		   krb5_db_entry *,
+		   int );
+krb5_error_code krb5_db2_db_put_principal 
+	(krb5_context,
+	 krb5_db_entry *,
+	 int *,
+	 char **db_args
+	 );
+krb5_error_code krb5_db2_db_iterate_ext
+    	(krb5_context,
+		   krb5_error_code (*) (krb5_pointer,
+					          krb5_db_entry *),
+	           krb5_pointer, int, int );
+krb5_error_code krb5_db2_db_iterate
+(krb5_context,char *,
+		   krb5_error_code (*) (krb5_pointer,
+					          krb5_db_entry *),
+	           krb5_pointer );
+krb5_error_code krb5_db2_db_set_nonblocking 
+	(krb5_context,
+		   krb5_boolean,
+		   krb5_boolean * );
+krb5_boolean krb5_db2_db_set_lockmode
+	(krb5_context,
+		   krb5_boolean );
+krb5_error_code krb5_db2_db_open_database 
+	(krb5_context);
+krb5_error_code krb5_db2_db_close_database 
+	(krb5_context);
+
+krb5_error_code 
+krb5_db2_set_master_key_ext ( krb5_context kcontext, 
+			      char *pwd, 
+			      krb5_keyblock *key);
+
+krb5_error_code
+krb5_db2_db_set_mkey( krb5_context context,
+		      krb5_keyblock *key);
+
+krb5_error_code
+krb5_db2_db_get_mkey( krb5_context context,
+		      krb5_keyblock **key);
+
+krb5_error_code
+krb5_db2_db_put_principal( krb5_context context,
+			   krb5_db_entry *entries,
+			   register int *nentries,
+			   char **db_args);
+
+krb5_error_code
+krb5_db2_db_delete_principal(krb5_context context,
+			     krb5_const_principal searchfor,
+			     int *nentries);
+
+krb5_error_code krb5_db2_lib_init(krb5_set_err_func_t);
+
+krb5_error_code krb5_db2_lib_cleanup(void);
+
+krb5_error_code 
+krb5_db2_db_unlock(krb5_context);
+
+krb5_error_code 
+krb5_db2_db_set_option ( krb5_context kcontext, 
+			 int option, 
+			 void *value );
+
+krb5_error_code
+krb5_db2_db_lock( krb5_context 	  context,
+		  int 	 	  in_mode);
+
+
+krb5_error_code 
+krb5_db2_open( krb5_context kcontext,
+			       char *conf_section,
+			       char **db_args,
+			       int mode );
+
+krb5_error_code krb5_db2_create( krb5_context kcontext,
+				 char *conf_section,
+				 char **db_args );
+
+krb5_error_code krb5_db2_destroy( krb5_context kcontext,
+				  char *conf_section,
+				  char **db_args );
+
+const char * krb5_db2_err2str( krb5_context kcontext,
+			       long err_code );
+
+void * 
+krb5_db2_alloc( krb5_context kcontext,  
+		void *ptr, 
+		size_t size );
+
+void 
+krb5_db2_free( krb5_context kcontext, 
+		    void *ptr );
+
+
+
+
+
+/* policy management functions */
+krb5_error_code
+krb5_db2_create_policy(krb5_context context, osa_policy_ent_t entry);
+
+krb5_error_code krb5_db2_get_policy ( krb5_context kcontext,
+				      char *name,
+				      osa_policy_ent_t *policy,
+				      int *cnt);
+
+krb5_error_code krb5_db2_get_policy ( krb5_context kcontext,
+				      char *name,
+				      osa_policy_ent_t *policy,
+				      int *cnt);
+
+krb5_error_code krb5_db2_put_policy ( krb5_context kcontext,
+				      osa_policy_ent_t policy );
+
+krb5_error_code krb5_db2_iter_policy ( krb5_context kcontext,
+				       char *match_entry,
+				       osa_adb_iter_policy_func func,
+				       void *data );
+
+krb5_error_code krb5_db2_delete_policy ( krb5_context kcontext,
+					 char *policy );
+
+void krb5_db2_free_policy( krb5_context kcontext,
+			   osa_policy_ent_t entry );
+
+
+
+extern krb5_set_err_func_t krb5_db2_dal_err_funcp;
+
+#endif /* KRB5_KDB_DB2_H */
diff --git a/src/plugins/kdb/db2/kdb_xdr.c b/src/plugins/kdb/db2/kdb_xdr.c
new file mode 100644
index 0000000000..396350d760
--- /dev/null
+++ b/src/plugins/kdb/db2/kdb_xdr.c
@@ -0,0 +1,493 @@
+/*
+ * lib/kdb/kdb_xdr.c
+ *
+ * Copyright 1995 by the Massachusetts Institute of Technology. 
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ */
+
+#include "k5-int.h"
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include "kdb_xdr.h"
+
+krb5_error_code
+krb5_encode_princ_dbkey(context, key, principal)
+    krb5_context context;
+    krb5_data  *key;
+    krb5_const_principal principal;
+{
+    char *princ_name;
+    krb5_error_code retval;
+
+    if (!(retval = krb5_unparse_name(context, principal, &princ_name))) {
+        /* need to store the NULL for decoding */
+        key->length = strlen(princ_name)+1;	
+        key->data = princ_name;
+    }
+    return(retval);
+}
+
+void
+krb5_free_princ_dbkey(context, key)
+    krb5_context context;
+    krb5_data  *key;
+{
+    (void) krb5_free_data_contents(context, key);
+}
+
+krb5_error_code
+krb5_encode_princ_contents(context, content, entry)
+    krb5_context 	  context;
+    krb5_data  		* content;
+    krb5_db_entry 	* entry;
+{
+    int 		  i, j;
+    unsigned int	  unparse_princ_size;
+    char 		* unparse_princ;
+    char		* nextloc;
+    krb5_tl_data	* tl_data;
+    krb5_error_code 	  retval;
+    krb5_int16		  psize16;
+
+    /*
+     * Generate one lump of data from the krb5_db_entry.
+     * This data must be independent of byte order of the machine,
+     * compact and extensible.
+     */
+
+    /* 
+     * First allocate enough space for all the data. 
+     * Need  2 bytes for the length of the base structure
+     * then 36 [ 8 * 4 + 2 * 2] bytes for the base information
+     *         [ attributes, max_life, max_renewable_life, expiration,
+     *	  	 pw_expiration, last_success, last_failed, fail_auth_count ]
+     *         [ n_key_data, n_tl_data ]
+     * then XX bytes [ e_length ] for the extra data [ e_data ]
+     * then XX bytes [ 2 for length + length for string ] for the principal,
+     * then (4 [type + length] + tl_data_length) bytes per tl_data
+     * then (4 + (4 + key_data_length) per key_data_contents) bytes per key_data
+     */
+    content->length = entry->len + entry->e_length;
+
+    if ((retval = krb5_unparse_name(context, entry->princ, &unparse_princ)))
+	return(retval);
+
+    unparse_princ_size = strlen(unparse_princ) + 1;
+    content->length += unparse_princ_size;
+    content->length += 2;		
+
+    i = 0;
+    /* tl_data is a linked list */
+    for (tl_data = entry->tl_data; tl_data; tl_data = tl_data->tl_data_next) {
+	content->length += tl_data->tl_data_length;
+	content->length += 4; /* type, length */
+	i++;
+    }
+
+    if (i != entry->n_tl_data) {
+	retval = KRB5_KDB_TRUNCATED_RECORD;
+	goto epc_error;
+    }
+
+    /* key_data is an array */
+    for (i = 0; i < entry->n_key_data; i++) {
+	content->length += 4; /* Version, KVNO */
+	for (j = 0; j < entry->key_data[i].key_data_ver; j++) {
+	    content->length += entry->key_data[i].key_data_length[j];
+	    content->length += 4; /* type + length */
+	}
+    }
+	
+    if ((content->data = malloc(content->length)) == NULL) {
+	retval = ENOMEM;
+	goto epc_error;
+    }
+
+    /* 
+     * Now we go through entry again, this time copying data 
+     * These first entries are always saved regardless of version
+     */
+    nextloc = content->data;
+
+	/* Base Length */
+    krb5_kdb_encode_int16(entry->len, nextloc);
+    nextloc += 2;
+
+	/* Attributes */
+    krb5_kdb_encode_int32(entry->attributes, nextloc);
+    nextloc += 4;
+  
+	/* Max Life */
+    krb5_kdb_encode_int32(entry->max_life, nextloc);
+    nextloc += 4;
+  
+	/* Max Renewable Life */
+    krb5_kdb_encode_int32(entry->max_renewable_life, nextloc);
+    nextloc += 4;
+  
+	/* When the client expires */
+    krb5_kdb_encode_int32(entry->expiration, nextloc);
+    nextloc += 4;
+  
+	/* When its passwd expires */
+    krb5_kdb_encode_int32(entry->pw_expiration, nextloc);
+    nextloc += 4;
+  
+	/* Last successful passwd */
+    krb5_kdb_encode_int32(entry->last_success, nextloc);
+    nextloc += 4;
+  
+	/* Last failed passwd attempt */
+    krb5_kdb_encode_int32(entry->last_failed, nextloc);
+    nextloc += 4;
+  
+	/* # of failed passwd attempt */
+    krb5_kdb_encode_int32(entry->fail_auth_count, nextloc);
+    nextloc += 4;
+
+	/* # tl_data strutures */
+    krb5_kdb_encode_int16(entry->n_tl_data, nextloc);
+    nextloc += 2;
+  
+	/* # key_data strutures */
+    krb5_kdb_encode_int16(entry->n_key_data, nextloc);
+    nextloc += 2;
+  
+    	/* Put extended fields here */
+    if (entry->len != KRB5_KDB_V1_BASE_LENGTH)
+	abort();
+
+	/* Any extra data that this version doesn't understand. */
+    if (entry->e_length) {
+	memcpy(nextloc, entry->e_data, entry->e_length);
+	nextloc += entry->e_length;
+    }
+  
+	/* 
+	 * Now we get to the principal.
+	 * To squeze a few extra bytes out it is always assumed to come
+	 * after the base type.
+	 */
+    psize16 = (krb5_int16) unparse_princ_size;
+    krb5_kdb_encode_int16(psize16, nextloc);
+    nextloc += 2;
+    (void) memcpy(nextloc, unparse_princ, unparse_princ_size);
+    nextloc += unparse_princ_size;
+
+    	/* tl_data is a linked list, of type, legth, contents */
+    for (tl_data = entry->tl_data; tl_data; tl_data = tl_data->tl_data_next) {
+	krb5_kdb_encode_int16(tl_data->tl_data_type, nextloc);
+	nextloc += 2;
+	krb5_kdb_encode_int16(tl_data->tl_data_length, nextloc);
+	nextloc += 2;
+
+	memcpy(nextloc, tl_data->tl_data_contents, tl_data->tl_data_length);
+	nextloc += tl_data->tl_data_length;
+    }
+
+    	/* key_data is an array */
+    for (i = 0; i < entry->n_key_data; i++) {
+	krb5_kdb_encode_int16(entry->key_data[i].key_data_ver, nextloc);
+	nextloc += 2;
+	krb5_kdb_encode_int16(entry->key_data[i].key_data_kvno, nextloc);
+	nextloc += 2;
+
+	for (j = 0; j < entry->key_data[i].key_data_ver; j++) {
+	    krb5_int16 type = entry->key_data[i].key_data_type[j];
+	    krb5_ui_2  length = entry->key_data[i].key_data_length[j];
+
+    	    krb5_kdb_encode_int16(type, nextloc);
+	    nextloc += 2;
+    	    krb5_kdb_encode_int16(length, nextloc);
+	    nextloc += 2;
+
+	    if (length) {
+	        memcpy(nextloc, entry->key_data[i].key_data_contents[j],length);
+	        nextloc += length;
+	    }
+	}
+    }
+	
+epc_error:;
+    free(unparse_princ);
+    return retval;
+}
+
+void
+krb5_free_princ_contents(context, contents)
+    krb5_context 	  context;
+    krb5_data *contents;
+{
+    krb5_free_data_contents(context, contents);
+    return;
+}
+
+krb5_error_code
+krb5_decode_princ_contents(context, content, entry)
+    krb5_context 	  context;
+    krb5_data  		* content;
+    krb5_db_entry 	* entry;
+{
+    int			  sizeleft, i;
+    char 		* nextloc;
+    krb5_tl_data       ** tl_data;
+    krb5_int16		  i16;
+
+    krb5_error_code retval;
+
+    /* Zero out entry and NULL pointers */
+    memset(entry, 0, sizeof(krb5_db_entry));
+
+    /*
+     * undo the effects of encode_princ_contents.
+     *
+     * The first part is decoding the base type. If the base type is
+     * bigger than the original base type then the additional fields
+     * need to be filled in. If the base type is larger than any
+     * known base type the additional data goes in e_data.
+     */
+
+    /* First do the easy stuff */
+    nextloc = content->data;
+    sizeleft = content->length;
+    if ((sizeleft -= KRB5_KDB_V1_BASE_LENGTH) < 0) 
+	return KRB5_KDB_TRUNCATED_RECORD;
+
+	/* Base Length */
+    krb5_kdb_decode_int16(nextloc, entry->len);
+    nextloc += 2;
+
+	/* Attributes */
+    krb5_kdb_decode_int32(nextloc, entry->attributes);
+    nextloc += 4;
+
+	/* Max Life */
+    krb5_kdb_decode_int32(nextloc, entry->max_life);
+    nextloc += 4;
+
+	/* Max Renewable Life */
+    krb5_kdb_decode_int32(nextloc, entry->max_renewable_life);
+    nextloc += 4;
+
+	/* When the client expires */
+    krb5_kdb_decode_int32(nextloc, entry->expiration);
+    nextloc += 4;
+
+	/* When its passwd expires */
+    krb5_kdb_decode_int32(nextloc, entry->pw_expiration);
+    nextloc += 4;
+
+	/* Last successful passwd */
+    krb5_kdb_decode_int32(nextloc, entry->last_success);
+    nextloc += 4;
+
+	/* Last failed passwd attempt */
+    krb5_kdb_decode_int32(nextloc, entry->last_failed);
+    nextloc += 4;
+
+	/* # of failed passwd attempt */
+    krb5_kdb_decode_int32(nextloc, entry->fail_auth_count);
+    nextloc += 4;
+
+	/* # tl_data strutures */
+    krb5_kdb_decode_int16(nextloc, entry->n_tl_data);
+    nextloc += 2;
+
+    if (entry->n_tl_data < 0)
+	return KRB5_KDB_TRUNCATED_RECORD;
+
+	/* # key_data strutures */
+    krb5_kdb_decode_int16(nextloc, entry->n_key_data);
+    nextloc += 2;
+
+    if (entry->n_key_data < 0)
+	return KRB5_KDB_TRUNCATED_RECORD;
+
+	/* Check for extra data */
+    if (entry->len > KRB5_KDB_V1_BASE_LENGTH) {
+	entry->e_length = entry->len - KRB5_KDB_V1_BASE_LENGTH;
+	if ((entry->e_data = (krb5_octet *)malloc(entry->e_length))) {
+	    memcpy(entry->e_data, nextloc, entry->e_length);
+	    nextloc += entry->e_length;
+	} else {
+	    return ENOMEM;
+	}
+    }
+
+    /*
+     * Get the principal name for the entry 
+     * (stored as a string which gets unparsed.)
+     */
+    if ((sizeleft -= 2) < 0) {
+	retval = KRB5_KDB_TRUNCATED_RECORD;
+	goto error_out;
+    }
+
+    i = 0;
+    krb5_kdb_decode_int16(nextloc, i16);
+    i = (int) i16;
+    nextloc += 2;
+
+    if ((retval = krb5_parse_name(context, nextloc, &(entry->princ))))
+	goto error_out;
+    if (((size_t) i != (strlen(nextloc) + 1)) || (sizeleft < i)) {
+	retval = KRB5_KDB_TRUNCATED_RECORD;
+	goto error_out;
+    }
+    sizeleft -= i;
+    nextloc += i;
+
+    	/* tl_data is a linked list */
+    tl_data = &entry->tl_data;
+    for (i = 0; i < entry->n_tl_data; i++) {
+    	if ((sizeleft -= 4) < 0) {
+	    retval = KRB5_KDB_TRUNCATED_RECORD;
+	    goto error_out;
+	}
+	if ((*tl_data = (krb5_tl_data *)
+	  malloc(sizeof(krb5_tl_data))) == NULL) {
+	    retval = ENOMEM;
+	    goto error_out;
+	}
+	(*tl_data)->tl_data_next = NULL;
+	(*tl_data)->tl_data_contents = NULL;
+	krb5_kdb_decode_int16(nextloc, (*tl_data)->tl_data_type);
+	nextloc += 2;
+	krb5_kdb_decode_int16(nextloc, (*tl_data)->tl_data_length);
+	nextloc += 2;
+
+    	if ((sizeleft -= (*tl_data)->tl_data_length) < 0) {
+	    retval = KRB5_KDB_TRUNCATED_RECORD;
+	    goto error_out;
+	}
+	if (((*tl_data)->tl_data_contents = (krb5_octet *)
+	  malloc((*tl_data)->tl_data_length)) == NULL) {
+	    retval = ENOMEM;
+	    goto error_out;
+	}
+	memcpy((*tl_data)->tl_data_contents,nextloc,(*tl_data)->tl_data_length);
+	nextloc += (*tl_data)->tl_data_length;
+	tl_data = &((*tl_data)->tl_data_next);
+    }
+
+    	/* key_data is an array */
+    if (entry->n_key_data && ((entry->key_data = (krb5_key_data *)
+      malloc(sizeof(krb5_key_data) * entry->n_key_data)) == NULL)) {
+        retval = ENOMEM;
+	goto error_out;
+    }
+    for (i = 0; i < entry->n_key_data; i++) {
+	krb5_key_data * key_data;
+        int j;
+
+    	if ((sizeleft -= 4) < 0) {
+	    retval = KRB5_KDB_TRUNCATED_RECORD;
+	    goto error_out;
+	}
+	key_data = entry->key_data + i;
+	memset(key_data, 0, sizeof(krb5_key_data));
+	krb5_kdb_decode_int16(nextloc, key_data->key_data_ver);
+	nextloc += 2;
+	krb5_kdb_decode_int16(nextloc, key_data->key_data_kvno);
+	nextloc += 2;
+
+	/* key_data_ver determins number of elements and how to unparse them. */
+	if (key_data->key_data_ver <= KRB5_KDB_V1_KEY_DATA_ARRAY) {
+	    for (j = 0; j < key_data->key_data_ver; j++) {
+    	        if ((sizeleft -= 4) < 0) {
+	            retval = KRB5_KDB_TRUNCATED_RECORD;
+	            goto error_out;
+	        }
+		krb5_kdb_decode_int16(nextloc, key_data->key_data_type[j]);
+		nextloc += 2;
+		krb5_kdb_decode_int16(nextloc, key_data->key_data_length[j]);
+		nextloc += 2;
+
+    	        if ((sizeleft -= key_data->key_data_length[j]) < 0) {
+	            retval = KRB5_KDB_TRUNCATED_RECORD;
+	            goto error_out;
+	        }
+	        if (key_data->key_data_length[j]) {
+	    	    if ((key_data->key_data_contents[j] = (krb5_octet *)
+	    	      malloc(key_data->key_data_length[j])) == NULL) {
+	                retval = ENOMEM;
+	                goto error_out;
+	            }
+	            memcpy(key_data->key_data_contents[j], nextloc, 
+		           key_data->key_data_length[j]);
+	            nextloc += key_data->key_data_length[j];
+		}
+	    }
+	} else {
+	    /* This isn't right. I'll fix it later */
+	    abort();
+	}
+    }
+    return 0;
+
+error_out:;
+    krb5_dbe_free_contents(context, entry);
+    return retval;
+}
+	    
+void
+krb5_dbe_free_contents(context, entry)
+     krb5_context 	  context; 
+     krb5_db_entry 	* entry;
+{
+    krb5_tl_data 	* tl_data_next;
+    krb5_tl_data 	* tl_data;
+    int i, j;
+
+    if (entry->e_data)
+	free(entry->e_data);
+    if (entry->princ)
+	krb5_free_principal(context, entry->princ);
+    for (tl_data = entry->tl_data; tl_data; tl_data = tl_data_next) {
+	tl_data_next = tl_data->tl_data_next;
+	if (tl_data->tl_data_contents)
+	    free(tl_data->tl_data_contents);
+	free(tl_data);
+    }
+    if (entry->key_data) {
+    	for (i = 0; i < entry->n_key_data; i++) {
+	    for (j = 0; j < entry->key_data[i].key_data_ver; j++) {
+	    	if (entry->key_data[i].key_data_length[j]) {
+		    if (entry->key_data[i].key_data_contents[j]) {
+		        memset(entry->key_data[i].key_data_contents[j], 
+			       0, 
+			       (unsigned) entry->key_data[i].key_data_length[j]);
+		    	free (entry->key_data[i].key_data_contents[j]);
+		    }
+		}
+		entry->key_data[i].key_data_contents[j] = NULL;
+		entry->key_data[i].key_data_length[j] = 0;
+		entry->key_data[i].key_data_type[j] = 0;
+	    }
+	}
+	free(entry->key_data);
+    }
+    memset(entry, 0, sizeof(*entry));
+    return;
+}
diff --git a/src/plugins/kdb/db2/kdb_xdr.h b/src/plugins/kdb/db2/kdb_xdr.h
new file mode 100644
index 0000000000..2ee068fbd5
--- /dev/null
+++ b/src/plugins/kdb/db2/kdb_xdr.h
@@ -0,0 +1,32 @@
+#ifndef _KDB2_XDR_H
+#define _KDB2_XDR_H
+
+krb5_error_code
+krb5_encode_princ_dbkey( krb5_context context,
+			 krb5_data  *key,
+			 krb5_const_principal principal);
+
+krb5_error_code
+krb5_decode_princ_contents( krb5_context 	  context,
+			    krb5_data  		* content,
+			    krb5_db_entry 	* entry);
+
+void
+krb5_dbe_free_contents( krb5_context 	  context,
+			krb5_db_entry 	* entry);
+
+krb5_error_code
+krb5_encode_princ_contents( krb5_context 	  context,
+			    krb5_data  		* content,
+			    krb5_db_entry 	* entry);
+
+
+void
+krb5_free_princ_dbkey( krb5_context context,
+		       krb5_data  *key);
+
+void
+krb5_free_princ_contents( krb5_context context,
+			  krb5_data *contents);
+
+#endif
diff --git a/src/plugins/kdb/db2/libdb2/CHANGELOG.db2 b/src/plugins/kdb/db2/libdb2/CHANGELOG.db2
new file mode 100644
index 0000000000..abd05f95d4
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/CHANGELOG.db2
@@ -0,0 +1,123 @@
+db2-alpha.0 -> db2-alpha.1
+		This fixes a number of bugs in the alpha release.
+		1. 64-bit functionality.  The test suite now runs on alphas.
+		Memory leak fixed.
+		Pairs no longer disappear when pages are exactly full.
+		Flush meta-data correctly on sync.
+1.86 -> db2-alpha.0
+		This is an interim release.  We are in the process of
+		adding logging, locking, and transaction support to all
+		the db access methods.  This will necessitate database
+		format changes, interface changes, and major upheaval.
+		In the meantime, this PRELIMINARY release is to correct
+		some known bugs in the hash pacakge.  This release uses
+		a different page format from 1.86, so you will need to
+		dump and reload any existing databases if you upgrade
+		to this (and may have to do it again when 2.0 becomes
+		available.
+1.85 -> 1.86
+	btree:	Fix to split code for single large record at the end of a
+		page.
+1.84 -> 1.85
+	recno:	#ifdef out use of mmap, it's not portable enough.
+
+1.83 -> 1.84	Thu Aug 18 15:46:07 EDT 1994
+	recno:	Rework fixed-length records so that closing and reopening
+		the file now works.  Pad short records on input.  Never do
+		signed comparison in recno input reading functions.
+
+1.82 -> 1.83	Tue Jul 26 15:33:44 EDT 1994
+	btree:	Rework cursor deletion code yet again; bugs with
+		deleting empty pages that only contained the cursor
+		record.
+
+1.81 -> 1.82	Sat Jul 16 11:01:50 EDT 1994
+	btree:	Fix bugs introduced by new cursor/deletion code.
+		Replace return kbuf/dbuf with real DBT's.
+
+1.80 -> 1.81
+	btree:	Fix bugs introduced by new cursor/deletion code.
+	all:	Add #defines for Purify.
+
+1.79 -> 1.80	Wed Jul 13 22:41:54 EDT 1994
+	btree	Change deletion to coalesce empty pages.  This is a major
+		change, cursors and duplicate pages all had to be reworked.
+		Return to a fixed stack.
+	recno:	Affected by cursor changes.  New cursor structures should
+		permit multiple cursors in the future.
+
+1.78 -> 1.79	Mon Jun 20 17:36:47 EDT 1994
+	all:	Minor cleanups of 1.78 for porting reasons; only
+		major change was inlining check of NULL pointer
+		so that __fix_realloc goes away.
+
+1.77 -> 1.78	Thu Jun 16 19:06:43 EDT 1994
+	all:	Move "standard" size typedef's into db.h.
+
+1.76 -> 1.77	Thu Jun 16 16:48:38 EDT 1994
+	hash:	Delete __init_ routine, has special meaning to OSF 2.0.
+
+1.74 -> 1.76
+	all:	Finish up the port to the Alpha.
+
+1.73 -> 1.74
+	recno:	Don't put the record if rec_search fails, in rec_rdelete.
+		Create fixed-length intermediate records past "end" of DB
+		correctly.
+		Realloc bug when reading in fixed records.
+	all:	First cut at port to Alpha (64-bit architecture) using
+		4.4BSD basic integral types typedef's.
+		Cast allocation pointers to shut up old compilers.
+		Rework PORT directory into OS/machine directories.
+
+1.72 -> 1.73
+	btree:	If enough duplicate records were inserted and then deleted
+		that internal pages had references to empty pages of the
+		duplicate keys, the search function ended up on the wrong
+		page.
+
+1.7  -> 1.72	12 Oct 1993
+	hash:	Support NET/2 hash formats.
+
+1.7  -> 1.71	16 Sep 1993
+	btree/recno:
+		Fix bug in internal search routines that caused
+		return of invalid pointers.
+
+1.6  -> 1.7	07 Sep 1993
+	hash:	Fixed big key overflow bugs.
+	test:	Portability hacks, rewrite test script, Makefile.
+	btree/recno:
+		Stop copying non-overflow key/data pairs.
+	PORT:	Break PORT directory up into per architecture/OS
+		subdirectories.
+
+1.5  -> 1.6	06 Jun 1993
+	hash:	In PAIRFITS, the first comparison should look at (P)[2].
+		The hash_realloc function was walking off the end of memory.
+		The overflow page number was wrong when bumping splitpoint.
+
+1.4  -> 1.5	23 May 1993
+	hash:	Set hash default fill factor dynamically.
+	recno:	Fixed bug in sorted page splits.
+		Add page size parameter support.
+		Allow recno to specify the name of the underlying btree;
+			used for vi recovery.
+	btree/recno:
+		Support 64K pages.
+	btree/hash/recno:
+		Provide access to an underlying file descriptor.
+		Change sync routines to take a flag argument, recno
+			uses this to sync out the underlying btree.
+
+1.3  -> 1.4	10 May 1993
+	recno:	Delete the R_CURSORLOG flag from the recno interface.
+		Zero-length record fix for non-mmap reads.
+		Try and make SIZE_T_MAX test in open portable.
+
+1.2  -> 1.3	01 May 1993
+	btree:	Ignore user byte-order setting when reading already
+		existing database.  Fixes to byte-order conversions.
+
+1.1  -> 1.2	15 Apr 1993
+		No bug fixes, only compatibility hacks.
diff --git a/src/plugins/kdb/db2/libdb2/ChangeLog b/src/plugins/kdb/db2/libdb2/ChangeLog
new file mode 100644
index 0000000000..3c6bc71e51
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/ChangeLog
@@ -0,0 +1,513 @@
+2005-12-16  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (all-unix): Do depend on all-libs.
+	(myfulldir, RELDIR): Updated for directory rename.
+	* hash/Makefile.in (myfulldir): Likewise.
+	* db/Makefile.in (myfulldir): Likewise.
+	* mpool/Makefile.in (myfulldir): Likewise.
+	* btree/Makefile.in (myfulldir): Likewise.
+	* recno/Makefile.in (myfulldir): Likewise.
+	* clib/Makefile.in (myfulldir): Likewise.
+
+2005-10-27  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Set build_dynobj=yes.
+
+	* Makefile.in (all-unix, clean-unix): Drop liblinks dependencies.
+
+2005-10-04  Ken Raeburn  <raeburn@mit.edu>
+
+	* Directory moved from util/db2 to modules/kdb/db2/libdb2.
+	* Makefile.in (myfulldir, RELTOP, BUILDTOP): Updated for directory
+	move.
+	* btree/Makefile.in (myfulldir, BUILDTOP): Likewise.
+	* hash/Makefile.in (myfulldir, BUILDTOP): Likewise.
+	* db/Makefile.in (myfulldir, BUILDTOP): Likewise.
+	* mpool/Makefile.in (myfulldir, BUILDTOP): Likewise.
+	* recno/Makefile.in (myfulldir, BUILDTOP): Likewise.
+	* clib/Makefile.in (myfulldir, BUILDTOP): Likewise.
+
+2005-08-20  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Use K5_AC_INIT instead of AC_INIT.
+
+2004-06-15  Ken Raeburn  <raeburn@mit.edu>
+
+	* mpool/mpool.c (mpool_get, mpool_write): Check that the offset
+	calculation didn't overflow.
+
+2004-06-11  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (include/generated.stmp): New intermediate target
+	file, to prevent repeated generation of unchanging header files.
+	(include/config.h, include/db-config.h): Depend on it.
+	($(srcdir)/include/autoconf.stmp, $(srcdir)/include/config.h.in):
+	Likewise.
+	(clean-includes): Delete the new intermediate target files.
+	* configure.in: Generate include/generated.stmp when config.status
+	is run.
+
+2004-06-08  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in ($(srcdir)/include/config.h.in): Always use
+	--include, never try --localdir.
+
+2004-06-04  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (LIBBASE): Renamed from LIB.
+
+2004-05-23  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Check for sys/param.h too.
+
+2004-05-07  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Check for machine/endian.h too.
+
+2004-05-05  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (all-prerecurse): Make sure headers generated by
+	config.status are up to date.
+	(include/config.h, $(srcdir)/include/config.h.in,
+	include/db-config.h): New rules.
+	* configure.in: Don't check byte order here.  Check for endian.h.
+
+2004-04-22  Ken Raeburn  <raeburn@mit.edu>
+
+	* libdb.exports: New file.
+
+2004-04-02  Ken Raeburn  <raeburn@mit.edu>
+
+	* btree/bt_seq.c: Include string.h.
+
+2003-04-01  Tom Yu  <tlyu@mit.edu>
+
+	* Makefile.in (install-unix): Delete install-libs.  We don't want
+	to install our in-tree libdb.
+
+2003-01-10  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Don't explicitly invoke AC_PROG_INSTALL.
+
+	* configure.in: Use V5_AC_OUTPUT_MAKEFILE instead of
+	K5_GEN_MAKEFILE and K5_AC_OUTPUT.
+
+	* Makefile.in: Add AC_SUBST_FILE marker for lib_frag.
+	* btree/Makefile.in, clib/Makefile.in, db/Makefile.in,
+	hash/Makefile.in, mpool/Makefile.in, recno/Makefile.in: Add
+	AC_SUBST_FILE marker for libobj_frag.
+
+2003-01-05  Sam Hartman  <hartmans@mit.edu>
+
+	* clib/mkstemp.c (_gettemp): Remove declaration of errno
+
+2002-09-05  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Check for stdint.h and inttypes.h.
+
+2002-09-03  Ezra Peisach  <epeisach@bu.edu>
+
+	* acconfig.h: Remove file. All handled by configure.in now.
+
+2002-08-29  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in, btree/Makefile.in, clib/Makefile.in,
+	db/Makefile.in, hash/Makefile.in, mpool/Makefile.in,
+	recno/Makefile.in: Revert $(S)=>/ change, for Windows support.
+
+2002-08-28  Tom Yu  <tlyu@mit.edu>
+
+	* btree/bt_split.c (bt_psplit): Correctly account for
+	sizeof(indx_t) when computing space used in a page by an item.
+	[patch from www.sleepycat.com]
+
+2002-08-23  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in, btree/Makefile.in, clib/Makefile.in,
+	db/Makefile.in, hash/Makefile.in, mpool/Makefile.in,
+	recno/Makefile.in: Change $(S)=>/ and $(U)=>.. globally.
+
+2002-08-23  Tom Yu  <tlyu@mit.edu>
+
+	* Makefile.in (LIBMINOR): Bump due to addition of bt_rseq().
+
+	* hash/hash_debug.c: Remove inclusion of compat.h, as we don't
+	have it in our build system.
+
+	* btree/extern.h: Add missing prototypes/renames for
+	__bt_dmpage().  Add renames for bt_rseq() support functions.
+
+	* btree/bt_seq.c (bt_rseq): New function; like __bt_seq() but does
+	recursive descent rather than using the prev/next pointers.  This
+	will catch some pages that might be missed if the database is
+	inconsistent.  Added support functions for bt_rseq() as well.
+
+	* btree/bt_page.c (__bt_free): Set B_METADIRTY when updating free
+	list.
+	(__bt_new): Set B_METADIRTY when updating free list.
+	[patch from www.sleepycat.com]
+
+	* btree/bt_debug.c (__bt_dump): Bound loop by number of pages
+	actually in file to avoid getting a nigh-infinite number of
+	all-zeroes pages.
+	(__bt_dmpage): Print a newline after dumping the meta page.
+	(__bt_dpage): Add DB* parameter; use this to get pagesize in order
+	to limit dumping of page contents, in case NEXTINDEX(h) happens to
+	be bogus.
+	(__bt_stat): Bound loop by number of pages actually in file so as
+	to stop counting pages after the actual end of file.
+
+	* btree/bt_close.c (__bt_sync): Apply a Kerbnet fix from long ago;
+	don't return prematurely when B_METADIRTY is set but B_MODIFIED is
+	clear.
+
+2002-08-14  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (SUBDIROBJLISTS): New variable.
+
+2002-01-03  Ken Raeburn  <raeburn@mit.edu>
+
+	* btree/bt_put.c (__bt_put): Correctly handle writing out the key
+	or data size on a big-endian 64-bit platform.
+
+2001-10-24  Ezra Peisach  <epeisach@mit.edu>
+
+	* configure.in: Add optional argument to AC_DEFINE to provide
+	comment in generated header file.
+
+	* acconfig.h: Remove int32_t and u_int32_t, handled by configure.in
+
+2001-07-08  Ezra Peisach  <epeisach@mit.edu>
+
+	* hash/hash_func.c (hash4): Declare first argument const.
+
+	* hash/hash.h: struct HTAB fname element now const.
+
+	* hash/hash.c: Declare third argument to hash_access and init_hash
+ 	const.
+
+2001-07-06  Ezra Peisach  <epeisach@mit.edu>
+
+	* hash/dbm.c: Include db-dbm.h for prototypes.
+
+2001-07-04  Ezra Peisach  <epeisach@mit.edu>
+
+	* hash/hash_log2.c: Include hash.h, page.h and extern.h for prototype.
+
+2001-06-21  Ezra Peisach  <epeisach@mit.edu>
+
+	* test/dbtest.c: Cast argument to isspace() to int. Do not shadow
+	global variables type and flags.
+
+	* btree/bt_search.c, btree/bt_seq.c, recno/rec_search.c: Change
+	local variable index to idx.
+
+2001-06-21  Ezra Peisach  <epeisach@mit.edu>
+
+	* btree/bt_delete.c, btree/bt_put.c, recno/rec_delete.c,
+ 	recno/rec_put.c: Change local variable index to idx.
+
+	* hash/hash_page.c: Change local variable stat to status to
+	prevent shadowing system function.
+
+2000-11-01  Ezra Peisach  <epeisach@mit.edu>
+
+	* configure.in (AC_COMPILE_TYPE): Declare with AC_DEFUN() instead
+	of define() as newer versions of autoconf check for AC_REQUIRE use
+	outside of AC_DEFUN.
+
+Thu Aug 10 23:21:01 2000  Ezra Peisach  <epeisach@mit.edu>
+
+	* configure.in: Add AC_PROG_INSTALL for installation of library.
+
+2000-07-04  Ezra Peisach  <epeisach@mit.edu>
+
+	* test/dbtest.c: Cleanup gcc -Wall complaints with printf format
+	strings.
+
+2000-07-02  Ezra Peisach  <epeisach@engrailed.mit.edu>
+
+	* recno/rec_seq.c: Include unused sccsid when LIBC_SCCS defined.
+
+	* recno/rec_close.c (__rec_close): Explicit braces to avoid
+	ambiguous `else'
+
+	* btree/bt_split.c (bt_psplit): Parenthesis about && and ||
+	conditional.
+
+	* btree/bt_put.c (__bt_put): Extra {} to make nested if/else
+	unambiguous.
+
+	* btree/bt_open.c (__bt_open): Add parenthesis to ensure
+	precedence ordering.
+
+	* hash/dbm.c (kdb2_dbm_firstkey): Conditionalize defintion of
+	variables based on use.
+
+	* hash/hash_func.c: Ifdef out unused static hash functions.
+
+	* hash/hash.c (init_htab): Remove unused variable.
+
+2000-07-01  Tom Yu  <tlyu@mit.edu>
+
+	* clib/strerror.c: #include config.h.
+
+	* clib/mkstemp.c: #include config.h.
+
+	* clib/memmove.c: #include config.h.
+
+	* clib/Makefile.in (LOCALINCLUDES): Add -I../include to get
+	config.h.
+
+	* configure.in: Generate two config headers, one for internal use
+	and one for external use.  Rework clib replacement code to use
+	AC_DEFINE rather than ADD_DEF.
+
+	* Makefile.in (STOBJLISTS): Add clib.
+
+2000-06-30  Tom Yu  <tlyu@mit.edu>
+
+	* configure.in: Rework to use krb5 build system.
+
+	* Makefile.in: Rework to use krb5 build system.
+
+	* btree/Makefile.in: New file.
+
+	* clib/Makefile.in: New file.
+
+	* db/Makefile.in: New file.
+
+	* mpool/Makefile.in: New file.
+
+	* recno/Makefile.in: New file.
+
+	* test/Makefile.in: New file.
+
+2000-06-26  Ken Raeburn  <raeburn@mit.edu>
+
+	* btree/bt_put.c (__bt_put): Initialize "e".
+
+2000-05-01  Nalin Dahyabhai  <nalin@redhat.com>
+
+	* hash/dbm.c (kdb2_dbm_open): Don't overflow buffer "path".
+
+1999-08-15  Tom Yu  <tlyu@mit.edu>
+
+	* README.NOT.SLEEPYCAT.DB: New file; pointer to README to
+	hopefully unconfuse people.
+
+	* README: Add notice to the effect that this is not Berkeley or
+	Sleepycat DB.
+
+	* README.db2: Renamed from README.
+
+Fri Feb 13 14:37:47 1998  Tom Yu  <tlyu@mit.edu>
+
+	* recno/extern.h: Additional renaming.
+
+	* hash/extern.h: Additional renaming.
+
+	* hash/hash_page.c (page_to_oaddr): 
+	(is_bitmap_pgno): Declare static to avoid leaking symbols.
+
+	* hash/search.h: Additional renaming.
+
+	* hash/hash_log2.c (__log2): Rename explicitly.
+
+	* mpool/mpool.h: Additional renaming.
+
+	* btree/extern.h: Additional renaming.
+
+	* hash/hash.c (__kdb2_hash_open): Rename to avoid potential
+ 	collision with NetBSD libc.
+
+	* hash/dbm.c: Rename lots of functions to avoid colliding with
+	native dbm implementations.
+
+	* db/db.c (kdb2_dbopen): Rename to avoid colliding with NetBSD
+	libc.
+
+Wed Jan 21 10:17:34 1998  Ezra Peisach  <epeisach@mit.edu>
+
+	* btree/bt_open.c: Added O_BINARY for __CYGWIN32__.
+	* clib/mkstemp.c: Added O_BINARY for __CYGWIN32__.
+	* db/db.c: Added O_BINARY for __CYGWIN32__.
+	* hash/dbm.c: Added O_BINARY for __CYGWIN32__.
+	* hash/hash.c: Added O_BINARY for __CYGWIN32__.
+	* hash/hsearch.c: Added O_BINARY for __CYGWIN32__.
+	* include/db-int.h: Added O_BINARY for __CYGWIN32__.
+	* recno/rec_open.c: Added O_BINARY for __CYGWIN32__.
+	* test/dbtest.c: Added O_BINARY for __CYGWIN32__.
+	* test/SEQ_TEST/t.c: Added O_BINARY for __CYGWIN32__.
+	* test/btree.tests/main.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/driver2.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/tcreat3.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/tdel.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/thash4.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/tread2.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/tseq.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash1.tests/tverify.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash2.tests/bigtest.c: Added O_BINARY for __CYGWIN32__.
+	* test/hash2.tests/passtest.c: Added O_BINARY for __CYGWIN32__.
+	Changes originally by Jeremy Allison (jra@cygnus.com)
+
+Thu Jan 15 11:34:13 1998  Ezra Peisach  <epeisach@mit.edu>
+
+	* hash/hash_bigkey.c (collect_key, collect_data): Cast malloc
+	return value to correct types. (raeburn@cygnus.com)
+
+	* obj/Makefile.in (check): Set srcdir in environment.
+	(raeburn@cygnus.com)
+
+	* configure.in (AC_COMPILE_TYPE): replacment for AC_CHECK_TYPE
+	that uses AC_TRY_COMPILE instead of AC_EGREP_CPP.  For now, only
+	use it for the int32 types (where AC_CHECK_TYPE gets the wrong
+	result on __CYGWIN32__) and plan that AC_CHECK_TYPE itself gets
+	repaired. (Fix by eichin@cygnus.com)
+
+
+Sun Dec 21 18:33:14 1997  Tom Yu  <tlyu@mit.edu>
+
+	* hash/dbm.c: Rename the errno member of HTAB.
+
+	* hash/hash.h: Rename the errno member of HTAB to local_errno to
+	avoid a collision with a glibc macro.
+
+	* hash/hash.c: Rename the errno member of HTAB to local_errno to
+	avoid a collision with a glibc macro.
+
+Mon Nov 11 17:01:29 1996  Mark Eichin  <eichin@cygnus.com>
+
+	* db2: overflow_page fixes, __P redef
+	* db2 tests: better alternate dictionary support
+
+	Tue Oct  8 22:55:01 1996  Mark W. Eichin  <eichin@cygnus.com>
+
+	* hash/hash.h (DEF_BUCKET_SIZE, DEF_SEGSIZE): now derived from
+ 	DEF_BUCKET_SHIFT and DEF_SEGSIZE_SHIFT respectively, for
+	consistency.
+
+	Tue Oct  8 22:43:26 1996  Mark W. Eichin  <eichin@cygnus.com>
+
+	* hash/hash_page.c (__add_ovflpage, __add_bigpage): overflow_page
+ 	can return a 0 indicating a failure -- callers must check it
+	instead of corrupting the database.
+	(overflow_page): document apparent error return.
+
+	Fri Aug 30 20:05:57 1996  Ken Raeburn  <raeburn@cygnus.com>
+
+	* test/dictionary: New file, list of garbage words.
+	* test/run.test (main): Use it if no other dictionary can be
+	found.  Set dictsize with size of dictionary.
+	(test12, test20): Skip if dictionary is too small.
+
+Wed Aug 28 17:25:10 1996  Tom Yu  <tlyu@mit.edu>
+
+	* configure.in: Add check for SIZEOF_INT.
+
+	* include/db.h: Check SIZEOF_INT rather than UINT_MAX; it's broken
+		under Ultrix.
+
+Thu Aug 22 23:13:32 1996  Ezra Peisach  <epeisach@mit.edu>
+
+	* Makefile.in: Add dummy rule for Makefiles.
+
+Wed Jul 31 03:35:47 1996  Tom Yu  <tlyu@mit.edu>
+
+	* obj/Makefile.in: Add -Dfoo=my_foo when compiling replacement
+		functions (so that the redefinitions in db-int.h take
+		effect).
+
+Mon Jul 29 23:24:22 1996  Tom Yu  <tlyu@mit.edu>
+
+	* hash/hash.c, hash/hash_func.c, hash/hash_page.c: Add "static" to
+ 		some function defn's that need them; they were prototyped
+ 		as static but not defined as static.
+
+Fri Jul 26 00:41:45 1996  Theodore Y. Ts'o  <tytso@mit.edu>
+
+	* Makefile.in (install): Add a blank install target to keep the
+		top-level "make install" happy.
+
+Tue Jul 23 16:08:43 1996  Ezra Peisach  <epeisach@mit.edu>
+
+	* hash/dbm.c: Copy elements from the datum to an internal
+	DBT. Handles case of differences in size of size fields.
+
+Fri Jun 21 00:07:57 1996  Marc Horowitz  <marc@mit.edu>
+
+	* hash/dbm.c (delete, store): dbm_rdonly() doesn't exist on some
+ 	systems.  In addition, the handle is really a DB handle, so it
+ 	would break if it did exist.  Remove calls to it.
+
+Wed Apr 10 21:39:54 1996  Marc Horowitz  <marc@mit.edu>
+
+	* hash/hash_page.c (__addel): It is possible to damage a page if a
+ 	bigpair is added and there's not enough room.  Check to make sure
+	there's enough room before adding anything.
+
+	* hash/hash.c (hdestroy, cursor_delete): there were still a few
+ 	things in the hashp which weren't being freed, causing a small
+ 	memory leak.
+
+Sun Apr  7 01:40:54 1996  Marc Horowitz  <marc@mit.edu>
+
+	* clib/mk{,s}temp.c: renamed to accurately reflect the function
+        being provided (ultrix 4.2 has one, but not the other).
+
+	* [way too many files to list here]: rename pgno_t to db_pgno_t,
+        since this symbol is defined in <sys/types> on at least one OS to
+        a non-compatible type (irix 5.2 defines it as long; db wants it to
+        be u_int32_t).
+
+	* hash/dbm.c, include/db-ndbm.h: use and reference the compat
+        ndbm.h file
+
+	* btree/bt_open.c, hash/hash.c, hash/hash_page.c,
+        include/db-int.h, include/db.h: build fixes - use configure to set
+        db internal cpp symbols for endianness stuff, move __P definition
+        from db-int.h to db.h.
+
+	* configure.in, acconfig.h, Makefile.in, obj/configure.in,
+        obj/acconfig.in, obj/Makefile.in: rearrange the configure inputs
+        to deal properly with configure at the top level, and with a
+        multiarchitecture build using VPATH
+
+Sat Apr  6 16:43:26 1996  Marc Horowitz  <marc@mit.edu>
+
+	* obj/Makefile.in: random cleanup
+
+	* btree/*.c db/db.c hash/*.c mpool/mpool.c recno/*.c
+        test/SEQ_TEST/t.c test/dbtest.c test/*/*.c: use "db-int.h" instead
+        of "db.h".
+
+	* include/db.h, include/db-int.h: rototilled to be portable and
+        sensible, using configure whenever possible.
+
+	* btree/*.c db/db.c hash/*.c mpool/mpool.c recno/*.c
+        test/SEQ_TEST/t.c test/dbtest.c test/*/*.c: use "db.h" instead of
+        <db.h>.
+
+	* hash/hash.h, btree/btree.h, mpool/mpool.c: #include "mpool.h"
+        instead of <mpool.h>.
+
+	* test/hash1.tests/thash4.c: remove unused and nonportable
+        <sys/timeb.h>
+
+	* test/hash2.tests/bigtest.c: replace <malloc.h> with <stdlib.h>
+
+	* clib/memmove.c: remove <sys/cdefs.h>
+
+	* mpool/mpool.c, mpool/mpool.h, hash/hash.h, include/db-queue.h:
+        include "db-queue.h" instead of <sys/queue.h>, since it's not part
+        of any OS standard.
+
+	* obj/*: first attempt at autoconfiscation
+
+	* test/hash1.tests/driver2.c (main), test/hash1.tests/tseq.c
+        (main): replace berkeley memoryisms with ansi ones.
+
+	* btree/bt_open.c (tmp): use sprintf instead of snprintf().
+	conditionalize signal stuff on SIG_BLOCK instead of using special
+	magic in a header file.
+
diff --git a/src/plugins/kdb/db2/libdb2/Makefile.in b/src/plugins/kdb/db2/libdb2/Makefile.in
new file mode 100644
index 0000000000..5e53de4238
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/Makefile.in
@@ -0,0 +1,41 @@
+thisconfigdir=.
+myfulldir=plugins/kdb/db2/libdb2
+mydir=.
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..
+LOCAL_SUBDIRS=hash btree db mpool recno clib test
+
+LIBBASE=db
+LIBMAJOR=1
+LIBMINOR=1
+STOBJLISTS=hash/OBJS.ST btree/OBJS.ST db/OBJS.ST mpool/OBJS.ST \
+	recno/OBJS.ST clib/OBJS.ST
+SUBDIROBJLISTS=$(STOBJLISTS)
+RELDIR=../plugins/kdb/db2/libdb2
+
+HDRDIR=$(BUILDTOP)/include
+HDRS =	$(HDRDIR)/db.h $(HDRDIR)/db-config.h $(HDRDIR)/db-ndbm.h
+
+all-unix:: includes all-libs
+all-prerecurse: include/config.h include/db-config.h
+clean-unix:: clean-libs clean-includes
+
+includes:: $(HDRS)
+
+$(HDRDIR)/db.h: $(srcdir)/include/db.h
+	$(CP) $(srcdir)/include/db.h $@
+$(HDRDIR)/db-config.h: include/db-config.h
+	$(CP) include/db-config.h $@
+$(HDRDIR)/db-ndbm.h: $(srcdir)/include/db-ndbm.h
+	$(CP) $(srcdir)/include/db-ndbm.h $@
+
+include/config.h include/db-config.h: include/generated.stmp
+include/generated.stmp: $(srcdir)/include/config.h.in $(srcdir)/include/db-config.h.in
+	cd $(thisconfigdir) && $(SHELL) config.status
+$(srcdir)/include/config.h.in: @MAINT@ $(srcdir)/include/autoconf.stmp
+$(srcdir)/include/autoconf.stmp: $(srcdir)/configure.in $(SRCTOP)/aclocal.m4
+	cd $(srcdir) && $(AUTOHEADER) --include=$(CONFIG_RELTOPDIR) $(AUTOHEADERFLAGS)
+	touch $(srcdir)/include/autoconf.stmp
+
+clean-includes::
+	$(RM) $(HDRS) include/*.stmp
+# @lib_frag@
diff --git a/src/plugins/kdb/db2/libdb2/Makefile.inc b/src/plugins/kdb/db2/libdb2/Makefile.inc
new file mode 100644
index 0000000000..77af9c5123
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/Makefile.inc
@@ -0,0 +1,10 @@
+#	@(#)Makefile.inc	8.2 (Berkeley) 2/21/94
+#
+CFLAGS+=-D__DBINTERFACE_PRIVATE
+
+.include "${.CURDIR}/db/btree/Makefile.inc"
+.include "${.CURDIR}/db/db/Makefile.inc"
+.include "${.CURDIR}/db/hash/Makefile.inc"
+.include "${.CURDIR}/db/man/Makefile.inc"
+.include "${.CURDIR}/db/mpool/Makefile.inc"
+.include "${.CURDIR}/db/recno/Makefile.inc"
diff --git a/src/plugins/kdb/db2/libdb2/README b/src/plugins/kdb/db2/libdb2/README
new file mode 100644
index 0000000000..70118bef5f
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/README
@@ -0,0 +1,17 @@
+			  IMPORTANT NOTICE:
+
+This directory contains code of somewhat unknown origin that is
+INCOMPATIBLE with both Berkeley DB 1.85 and Sleepycat DB 2.x.  Do NOT
+contact Sleepycat regarding bugs in code found here; they do not
+appreciate it.  All bug reports about this code should go to the MIT
+Kerberos team via krb5-send-pr or email to krb5-bugs@mit.edu, as
+usual.
+
+It is believed that this "db" code originated from Berkeley DB 1.85
+and was further modified by Cygnus and the MIT Kerberos team.  Some
+significant changes to the hash code occured at some point.
+
+The file README.db2 contains the README file provided with the
+2.0-alpha release of Berkeley/Sleepycat DB, which may contain
+marginally useful information.  It is not known at this time how well
+this code matches that of the 2.0-alpha release.
diff --git a/src/plugins/kdb/db2/libdb2/README.NOT.SLEEPYCAT.DB b/src/plugins/kdb/db2/libdb2/README.NOT.SLEEPYCAT.DB
new file mode 100644
index 0000000000..112454e945
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/README.NOT.SLEEPYCAT.DB
@@ -0,0 +1,2 @@
+THIS IS NOT THE SLEEPYCAT DB.
+Please see the README file for more information.
diff --git a/src/plugins/kdb/db2/libdb2/README.db2 b/src/plugins/kdb/db2/libdb2/README.db2
new file mode 100644
index 0000000000..5700b73932
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/README.db2
@@ -0,0 +1,41 @@
+#	@(#)README	8.28 (Berkeley) 11/2/95
+
+This is version 2.0-ALPHA of the Berkeley DB code.
+THIS IS A PRELIMINARY RELEASE.
+
+For information on compiling and installing this software, see the file
+PORT/README.
+
+Newer versions of this software will periodically be made available by
+anonymous ftp from ftp.cs.berkeley.edu:ucb/4bsd/db.tar.{Z,gz} and from
+ftp.harvard.edu:margo/db.tar.{Z,gz}.  If you want to receive announcements
+of future releases of this software, send email to the contact address
+below.
+
+Email questions may be addressed to dbinfo@eecs.harvard.edu.
+
+============================================
+Distribution contents:
+
+README		This file.
+CHANGELOG	List of changes, per version.
+btree		B+tree access method.
+db		The db_open interface routine.
+docs		Various USENIX papers, and the formatted manual pages.
+hash		Extended linear hashing access method.
+lock		Lock manager.
+log		Log manager.
+man		The unformatted manual pages.
+mpool		The buffer manager support.
+mutex		Mutex support.
+recno		The fixed/variable length record access method.
+test		Test package.
+txn		Transaction support.
+
+============================================
+Debugging:
+
+If you're running a memory checker (e.g. Purify) on DB, make sure that
+you recompile it with "-DPURIFY" in the CFLAGS, first.  By default,
+allocated pages are not initialized by the DB code, and they will show
+up as reads of uninitialized memory in the buffer write routines.
diff --git a/src/plugins/kdb/db2/libdb2/btree/Makefile.in b/src/plugins/kdb/db2/libdb2/btree/Makefile.in
new file mode 100644
index 0000000000..52243b4607
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/Makefile.in
@@ -0,0 +1,14 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/btree
+mydir=btree
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+STLIBOBJS=	bt_close.o bt_conv.o bt_debug.o bt_delete.o bt_get.o \
+		bt_open.o bt_overflow.o bt_page.o bt_put.o bt_search.o \
+		bt_seq.o bt_split.o bt_utils.o
+
+LOCALINCLUDES=	-I. -I$(srcdir)/../include -I../include -I$(srcdir)/../mpool \
+		-I$(srcdir)/../db
+
+all-unix:: all-libobjs
+clean-unix:: clean-libobjs
+# @libobj_frag@
diff --git a/src/plugins/kdb/db2/libdb2/btree/Makefile.inc b/src/plugins/kdb/db2/libdb2/btree/Makefile.inc
new file mode 100644
index 0000000000..8ed76494aa
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/Makefile.inc
@@ -0,0 +1,7 @@
+#	@(#)Makefile.inc	8.2 (Berkeley) 7/14/94
+
+.PATH: ${.CURDIR}/db/btree
+
+SRCS+=	bt_close.c bt_conv.c bt_debug.c bt_delete.c bt_get.c bt_open.c \
+	bt_overflow.c bt_page.c bt_put.c bt_search.c bt_seq.c bt_split.c \
+	bt_utils.c
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_close.c b/src/plugins/kdb/db2/libdb2/btree/bt_close.c
new file mode 100644
index 0000000000..11be134113
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_close.c
@@ -0,0 +1,183 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_close.c	8.7 (Berkeley) 8/17/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static int bt_meta __P((BTREE *));
+
+/*
+ * BT_CLOSE -- Close a btree.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__bt_close(dbp)
+	DB *dbp;
+{
+	BTREE *t;
+	int fd;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* Sync the tree. */
+	if (__bt_sync(dbp, 0) == RET_ERROR)
+		return (RET_ERROR);
+
+	/* Close the memory pool. */
+	if (mpool_close(t->bt_mp) == RET_ERROR)
+		return (RET_ERROR);
+
+	/* Free random memory. */
+	if (t->bt_cursor.key.data != NULL) {
+		free(t->bt_cursor.key.data);
+		t->bt_cursor.key.size = 0;
+		t->bt_cursor.key.data = NULL;
+	}
+	if (t->bt_rkey.data) {
+		free(t->bt_rkey.data);
+		t->bt_rkey.size = 0;
+		t->bt_rkey.data = NULL;
+	}
+	if (t->bt_rdata.data) {
+		free(t->bt_rdata.data);
+		t->bt_rdata.size = 0;
+		t->bt_rdata.data = NULL;
+	}
+
+	fd = t->bt_fd;
+	free(t);
+	free(dbp);
+	return (close(fd) ? RET_ERROR : RET_SUCCESS);
+}
+
+/*
+ * BT_SYNC -- sync the btree to disk.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__bt_sync(dbp, flags)
+	const DB *dbp;
+	u_int flags;
+{
+	BTREE *t;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* Sync doesn't currently take any flags. */
+	if (flags != 0) {
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	if (F_ISSET(t, B_INMEM | B_RDONLY)
+	    || !F_ISSET(t, B_MODIFIED | B_METADIRTY))
+		return (RET_SUCCESS);
+
+	if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
+		return (RET_ERROR);
+
+	if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
+		F_CLR(t, B_MODIFIED);
+
+	return (status);
+}
+
+/*
+ * BT_META -- write the tree meta data to disk.
+ *
+ * Parameters:
+ *	t:	tree
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+static int
+bt_meta(t)
+	BTREE *t;
+{
+	BTMETA m;
+	void *p;
+
+	if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
+		return (RET_ERROR);
+
+	/* Fill in metadata. */
+	m.magic = BTREEMAGIC;
+	m.version = BTREEVERSION;
+	m.psize = t->bt_psize;
+	m.free = t->bt_free;
+	m.nrecs = t->bt_nrecs;
+	m.flags = F_ISSET(t, SAVEMETA);
+
+	memmove(p, &m, sizeof(BTMETA));
+	mpool_put(t->bt_mp, p, MPOOL_DIRTY);
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_conv.c b/src/plugins/kdb/db2/libdb2/btree/bt_conv.c
new file mode 100644
index 0000000000..6cfa216ca8
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_conv.c
@@ -0,0 +1,221 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_conv.c	8.5 (Berkeley) 8/17/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+
+#include <stdio.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static void mswap __P((PAGE *));
+
+/*
+ * __BT_BPGIN, __BT_BPGOUT --
+ *	Convert host-specific number layout to/from the host-independent
+ *	format stored on disk.
+ *
+ * Parameters:
+ *	t:	tree
+ *	pg:	page number
+ *	h:	page to convert
+ */
+void
+__bt_pgin(t, pg, pp)
+	void *t;
+	db_pgno_t pg;
+	void *pp;
+{
+	PAGE *h;
+	indx_t i, top;
+	u_char flags;
+	char *p;
+
+	if (!F_ISSET(((BTREE *)t), B_NEEDSWAP))
+		return;
+	if (pg == P_META) {
+		mswap(pp);
+		return;
+	}
+
+	h = pp;
+	M_32_SWAP(h->pgno);
+	M_32_SWAP(h->prevpg);
+	M_32_SWAP(h->nextpg);
+	M_32_SWAP(h->flags);
+	M_16_SWAP(h->lower);
+	M_16_SWAP(h->upper);
+
+	top = NEXTINDEX(h);
+	if ((h->flags & P_TYPE) == P_BINTERNAL)
+		for (i = 0; i < top; i++) {
+			M_16_SWAP(h->linp[i]);
+			p = (char *)GETBINTERNAL(h, i);
+			P_32_SWAP(p);
+			p += sizeof(u_int32_t);
+			P_32_SWAP(p);
+			p += sizeof(db_pgno_t);
+			if (*(u_char *)p & P_BIGKEY) {
+				p += sizeof(u_char);
+				P_32_SWAP(p);
+				p += sizeof(db_pgno_t);
+				P_32_SWAP(p);
+			}
+		}
+	else if ((h->flags & P_TYPE) == P_BLEAF)
+		for (i = 0; i < top; i++) {
+			M_16_SWAP(h->linp[i]);
+			p = (char *)GETBLEAF(h, i);
+			P_32_SWAP(p);
+			p += sizeof(u_int32_t);
+			P_32_SWAP(p);
+			p += sizeof(u_int32_t);
+			flags = *(u_char *)p;
+			if (flags & (P_BIGKEY | P_BIGDATA)) {
+				p += sizeof(u_char);
+				if (flags & P_BIGKEY) {
+					P_32_SWAP(p);
+					p += sizeof(db_pgno_t);
+					P_32_SWAP(p);
+				}
+				if (flags & P_BIGDATA) {
+					p += sizeof(u_int32_t);
+					P_32_SWAP(p);
+					p += sizeof(db_pgno_t);
+					P_32_SWAP(p);
+				}
+			}
+		}
+}
+
+void
+__bt_pgout(t, pg, pp)
+	void *t;
+	db_pgno_t pg;
+	void *pp;
+{
+	PAGE *h;
+	indx_t i, top;
+	u_char flags;
+	char *p;
+
+	if (!F_ISSET(((BTREE *)t), B_NEEDSWAP))
+		return;
+	if (pg == P_META) {
+		mswap(pp);
+		return;
+	}
+
+	h = pp;
+	top = NEXTINDEX(h);
+	if ((h->flags & P_TYPE) == P_BINTERNAL)
+		for (i = 0; i < top; i++) {
+			p = (char *)GETBINTERNAL(h, i);
+			P_32_SWAP(p);
+			p += sizeof(u_int32_t);
+			P_32_SWAP(p);
+			p += sizeof(db_pgno_t);
+			if (*(u_char *)p & P_BIGKEY) {
+				p += sizeof(u_char);
+				P_32_SWAP(p);
+				p += sizeof(db_pgno_t);
+				P_32_SWAP(p);
+			}
+			M_16_SWAP(h->linp[i]);
+		}
+	else if ((h->flags & P_TYPE) == P_BLEAF)
+		for (i = 0; i < top; i++) {
+			p = (char *)GETBLEAF(h, i);
+			P_32_SWAP(p);
+			p += sizeof(u_int32_t);
+			P_32_SWAP(p);
+			p += sizeof(u_int32_t);
+			flags = *(u_char *)p;
+			if (flags & (P_BIGKEY | P_BIGDATA)) {
+				p += sizeof(u_char);
+				if (flags & P_BIGKEY) {
+					P_32_SWAP(p);
+					p += sizeof(db_pgno_t);
+					P_32_SWAP(p);
+				}
+				if (flags & P_BIGDATA) {
+					p += sizeof(u_int32_t);
+					P_32_SWAP(p);
+					p += sizeof(db_pgno_t);
+					P_32_SWAP(p);
+				}
+			}
+			M_16_SWAP(h->linp[i]);
+		}
+
+	M_32_SWAP(h->pgno);
+	M_32_SWAP(h->prevpg);
+	M_32_SWAP(h->nextpg);
+	M_32_SWAP(h->flags);
+	M_16_SWAP(h->lower);
+	M_16_SWAP(h->upper);
+}
+
+/*
+ * MSWAP -- Actually swap the bytes on the meta page.
+ *
+ * Parameters:
+ *	p:	page to convert
+ */
+static void
+mswap(pg)
+	PAGE *pg;
+{
+	char *p;
+
+	p = (char *)pg;
+	P_32_SWAP(p);		/* magic */
+	p += sizeof(u_int32_t);
+	P_32_SWAP(p);		/* version */
+	p += sizeof(u_int32_t);
+	P_32_SWAP(p);		/* psize */
+	p += sizeof(u_int32_t);
+	P_32_SWAP(p);		/* free */
+	p += sizeof(u_int32_t);
+	P_32_SWAP(p);		/* nrecs */
+	p += sizeof(u_int32_t);
+	P_32_SWAP(p);		/* flags */
+	p += sizeof(u_int32_t);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_debug.c b/src/plugins/kdb/db2/libdb2/btree/bt_debug.c
new file mode 100644
index 0000000000..d36256b3af
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_debug.c
@@ -0,0 +1,377 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994, 1995
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_debug.c	8.6 (Berkeley) 1/9/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+#if defined(DEBUG) || defined(STATISTICS)
+
+static FILE *tracefp;
+
+/*
+ * __bt_dinit --
+ *	initialize debugging.
+ */
+static void
+__bt_dinit()
+{
+	static int first = 1;
+	char buf[1024];
+
+	if (!first)
+		return;
+	first = 0;
+
+#ifndef TRACE_TO_STDERR
+	if ((tracefp = fopen("/tmp/__bt_debug", "w")) != NULL)
+		return;
+#endif
+	tracefp = stderr;
+}
+#endif
+
+#ifdef DEBUG
+/*
+ * __bt_dump --
+ *	dump the tree
+ *
+ * Parameters:
+ *	dbp:	pointer to the DB
+ */
+int
+__bt_dump(dbp)
+	DB *dbp;
+{
+	BTREE *t;
+	PAGE *h;
+	db_pgno_t i;
+	char *sep;
+
+	__bt_dinit();
+
+	t = dbp->internal;
+	(void)fprintf(tracefp, "%s: pgsz %d",
+	    F_ISSET(t, B_INMEM) ? "memory" : "disk", t->bt_psize);
+	if (F_ISSET(t, R_RECNO))
+		(void)fprintf(tracefp, " keys %lu", t->bt_nrecs);
+#undef X
+#define	X(flag, name) \
+	if (F_ISSET(t, flag)) { \
+		(void)fprintf(tracefp, "%s%s", sep, name); \
+		sep = ", "; \
+	}
+	if (t->flags != 0) {
+		sep = " flags (";
+		X(R_FIXLEN,	"FIXLEN");
+		X(B_INMEM,	"INMEM");
+		X(B_NODUPS,	"NODUPS");
+		X(B_RDONLY,	"RDONLY");
+		X(R_RECNO,	"RECNO");
+		X(B_METADIRTY,"METADIRTY");
+		(void)fprintf(tracefp, ")\n");
+	}
+#undef X
+	for (i = P_ROOT; i < t->bt_mp->npages &&
+	    (h = mpool_get(t->bt_mp, i, MPOOL_IGNOREPIN)) != NULL; ++i)
+		__bt_dpage(dbp, h);
+	(void)fflush(tracefp);
+	return (0);
+}
+
+/*
+ * BT_DMPAGE -- Dump the meta page
+ *
+ * Parameters:
+ *	h:	pointer to the PAGE
+ */
+int
+__bt_dmpage(h)
+	PAGE *h;
+{
+	BTMETA *m;
+	char *sep;
+
+	__bt_dinit();
+
+	m = (BTMETA *)h;
+	(void)fprintf(tracefp, "magic %lx\n", m->magic);
+	(void)fprintf(tracefp, "version %lu\n", m->version);
+	(void)fprintf(tracefp, "psize %lu\n", m->psize);
+	(void)fprintf(tracefp, "free %lu\n", m->free);
+	(void)fprintf(tracefp, "nrecs %lu\n", m->nrecs);
+	(void)fprintf(tracefp, "flags %lu", m->flags);
+#undef X
+#define	X(flag, name) \
+	if (m->flags & flag) { \
+		(void)fprintf(tracefp, "%s%s", sep, name); \
+		sep = ", "; \
+	}
+	if (m->flags) {
+		sep = " (";
+		X(B_NODUPS,	"NODUPS");
+		X(R_RECNO,	"RECNO");
+		(void)fprintf(tracefp, ")");
+	}
+	(void)fprintf(tracefp, "\n");
+	(void)fflush(tracefp);
+	return (0);
+}
+
+/*
+ * BT_DNPAGE -- Dump the page
+ *
+ * Parameters:
+ *	n:	page number to dump.
+ */
+int
+__bt_dnpage(dbp, pgno)
+	DB *dbp;
+	db_pgno_t pgno;
+{
+	BTREE *t;
+	PAGE *h;
+
+	__bt_dinit();
+
+	t = dbp->internal;
+	if ((h = mpool_get(t->bt_mp, pgno, MPOOL_IGNOREPIN)) != NULL)
+		__bt_dpage(dbp, h);
+	(void)fflush(tracefp);
+	return (0);
+}
+
+/*
+ * BT_DPAGE -- Dump the page
+ *
+ * Parameters:
+ *	h:	pointer to the PAGE
+ */
+int
+__bt_dpage(dbp, h)
+	DB *dbp;
+	PAGE *h;
+{
+	BINTERNAL *bi;
+	BLEAF *bl;
+	RINTERNAL *ri;
+	RLEAF *rl;
+	u_long pgsize;
+	indx_t cur, top, lim;
+	char *sep;
+
+	__bt_dinit();
+
+	(void)fprintf(tracefp, "    page %d: (", h->pgno);
+#undef X
+#define	X(flag, name)							\
+	if (h->flags & flag) {						\
+		(void)fprintf(tracefp, "%s%s", sep, name);		\
+		sep = ", ";						\
+	}
+	sep = "";
+	X(P_BINTERNAL,	"BINTERNAL")		/* types */
+	X(P_BLEAF,	"BLEAF")
+	X(P_RINTERNAL,	"RINTERNAL")		/* types */
+	X(P_RLEAF,	"RLEAF")
+	X(P_OVERFLOW,	"OVERFLOW")
+	X(P_PRESERVE,	"PRESERVE");
+	(void)fprintf(tracefp, ")\n");
+#undef X
+
+	(void)fprintf(tracefp, "\tprev %2d next %2d", h->prevpg, h->nextpg);
+	if (h->flags & P_OVERFLOW)
+		return;
+
+	pgsize = ((BTREE *)dbp->internal)->bt_mp->pagesize;
+	lim = (pgsize - BTDATAOFF) / sizeof(indx_t);
+	top = NEXTINDEX(h);
+	lim = top > lim ? lim : top;
+	(void)fprintf(tracefp, " lower %3d upper %3d nextind %d\n",
+	    h->lower, h->upper, top);
+	for (cur = 0; cur < lim; cur++) {
+		(void)fprintf(tracefp, "\t[%03d] %4d ", cur, h->linp[cur]);
+		switch (h->flags & P_TYPE) {
+		case P_BINTERNAL:
+			bi = GETBINTERNAL(h, cur);
+			(void)fprintf(tracefp,
+			    "size %03d pgno %03d", bi->ksize, bi->pgno);
+			if (bi->flags & P_BIGKEY)
+				(void)fprintf(tracefp, " (indirect)");
+			else if (bi->ksize)
+				(void)fprintf(tracefp,
+				    " {%.*s}", (int)bi->ksize, bi->bytes);
+			break;
+		case P_RINTERNAL:
+			ri = GETRINTERNAL(h, cur);
+			(void)fprintf(tracefp, "entries %03d pgno %03d",
+				ri->nrecs, ri->pgno);
+			break;
+		case P_BLEAF:
+			bl = GETBLEAF(h, cur);
+			if (bl->flags & P_BIGKEY)
+				(void)fprintf(tracefp,
+				    "big key page %lu size %u/",
+				    *(db_pgno_t *)bl->bytes,
+				    *(u_int32_t *)(bl->bytes + sizeof(db_pgno_t)));
+			else if (bl->ksize)
+				(void)fprintf(tracefp, "%s/", bl->bytes);
+			if (bl->flags & P_BIGDATA)
+				(void)fprintf(tracefp,
+				    "big data page %lu size %u",
+				    *(db_pgno_t *)(bl->bytes + bl->ksize),
+				    *(u_int32_t *)(bl->bytes + bl->ksize +
+				    sizeof(db_pgno_t)));
+			else if (bl->dsize)
+				(void)fprintf(tracefp, "%.*s",
+				    (int)bl->dsize, bl->bytes + bl->ksize);
+			break;
+		case P_RLEAF:
+			rl = GETRLEAF(h, cur);
+			if (rl->flags & P_BIGDATA)
+				(void)fprintf(tracefp,
+				    "big data page %lu size %u",
+				    *(db_pgno_t *)rl->bytes,
+				    *(u_int32_t *)(rl->bytes + sizeof(db_pgno_t)));
+			else if (rl->dsize)
+				(void)fprintf(tracefp,
+				    "%.*s", (int)rl->dsize, rl->bytes);
+			break;
+		}
+		(void)fprintf(tracefp, "\n");
+	}
+	(void)fflush(tracefp);
+	return (0);
+}
+#endif
+
+#ifdef STATISTICS
+/*
+ * bt_stat --
+ *	Gather/print the tree statistics
+ *
+ * Parameters:
+ *	dbp:	pointer to the DB
+ */
+int
+__bt_stat(dbp)
+	DB *dbp;
+{
+	extern u_long bt_cache_hit, bt_cache_miss, bt_pfxsaved, bt_rootsplit;
+	extern u_long bt_sortsplit, bt_split;
+	BTREE *t;
+	PAGE *h;
+	db_pgno_t i, pcont, pinternal, pleaf;
+	u_long ifree, lfree, nkeys;
+	int levels;
+
+	__bt_dinit();
+
+	t = dbp->internal;
+	pcont = pinternal = pleaf = 0;
+	nkeys = ifree = lfree = 0;
+	for (i = P_ROOT; i < t->bt_mp->npages &&
+	    (h = mpool_get(t->bt_mp, i, MPOOL_IGNOREPIN)) != NULL; ++i)
+		switch (h->flags & P_TYPE) {
+		case P_BINTERNAL:
+		case P_RINTERNAL:
+			++pinternal;
+			ifree += h->upper - h->lower;
+			break;
+		case P_BLEAF:
+		case P_RLEAF:
+			++pleaf;
+			lfree += h->upper - h->lower;
+			nkeys += NEXTINDEX(h);
+			break;
+		case P_OVERFLOW:
+			++pcont;
+			break;
+		}
+
+	/* Count the levels of the tree. */
+	for (i = P_ROOT, levels = 0 ;; ++levels) {
+		h = mpool_get(t->bt_mp, i, MPOOL_IGNOREPIN);
+		if (h->flags & (P_BLEAF|P_RLEAF)) {
+			if (levels == 0)
+				levels = 1;
+			break;
+		}
+		i = F_ISSET(t, R_RECNO) ?
+		    GETRINTERNAL(h, 0)->pgno :
+		    GETBINTERNAL(h, 0)->pgno;
+	}
+
+	(void)fprintf(tracefp, "%d level%s with %ld keys",
+	    levels, levels == 1 ? "" : "s", nkeys);
+	if (F_ISSET(t, R_RECNO))
+		(void)fprintf(tracefp, " (%ld header count)", t->bt_nrecs);
+	(void)fprintf(tracefp,
+	    "\n%lu pages (leaf %ld, internal %ld, overflow %ld)\n",
+	    pinternal + pleaf + pcont, pleaf, pinternal, pcont);
+	(void)fprintf(tracefp, "%ld cache hits, %ld cache misses\n",
+	    bt_cache_hit, bt_cache_miss);
+	(void)fprintf(tracefp,
+	    "%ld splits (%ld root splits, %ld sort splits)\n",
+	    bt_split, bt_rootsplit, bt_sortsplit);
+	pleaf *= t->bt_psize - BTDATAOFF;
+	if (pleaf)
+		(void)fprintf(tracefp,
+		    "%.0f%% leaf fill (%ld bytes used, %ld bytes free)\n",
+		    ((double)(pleaf - lfree) / pleaf) * 100,
+		    pleaf - lfree, lfree);
+	pinternal *= t->bt_psize - BTDATAOFF;
+	if (pinternal)
+		(void)fprintf(tracefp,
+		    "%.0f%% internal fill (%ld bytes used, %ld bytes free\n",
+		    ((double)(pinternal - ifree) / pinternal) * 100,
+		    pinternal - ifree, ifree);
+	if (bt_pfxsaved)
+		(void)fprintf(tracefp, "prefix checking removed %lu bytes.\n",
+		    bt_pfxsaved);
+	(void)fflush(tracefp);
+	return (0);
+}
+#endif
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_delete.c b/src/plugins/kdb/db2/libdb2/btree/bt_delete.c
new file mode 100644
index 0000000000..d002a66edd
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_delete.c
@@ -0,0 +1,657 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_delete.c	8.13 (Berkeley) 7/28/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static int __bt_bdelete __P((BTREE *, const DBT *));
+static int __bt_curdel __P((BTREE *, const DBT *, PAGE *, u_int));
+static int __bt_pdelete __P((BTREE *, PAGE *));
+static int __bt_relink __P((BTREE *, PAGE *));
+static int __bt_stkacq __P((BTREE *, PAGE **, CURSOR *));
+
+/*
+ * __bt_delete
+ *	Delete the item(s) referenced by a key.
+ *
+ * Return RET_SPECIAL if the key is not found.
+ */
+int
+__bt_delete(dbp, key, flags)
+	const DB *dbp;
+	const DBT *key;
+	u_int flags;
+{
+	BTREE *t;
+	CURSOR *c;
+	PAGE *h;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* Check for change to a read-only tree. */
+	if (F_ISSET(t, B_RDONLY)) {
+		errno = EPERM;
+		return (RET_ERROR);
+	}
+
+	switch (flags) {
+	case 0:
+		status = __bt_bdelete(t, key);
+		break;
+	case R_CURSOR:
+		/*
+		 * If flags is R_CURSOR, delete the cursor.  Must already
+		 * have started a scan and not have already deleted it.
+		 */
+		c = &t->bt_cursor;
+		if (F_ISSET(c, CURS_INIT)) {
+			if (F_ISSET(c, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE))
+				return (RET_SPECIAL);
+			if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+				return (RET_ERROR);
+
+			/*
+			 * If the page is about to be emptied, we'll need to
+			 * delete it, which means we have to acquire a stack.
+			 */
+			if (NEXTINDEX(h) == 1)
+				if (__bt_stkacq(t, &h, &t->bt_cursor))
+					return (RET_ERROR);
+
+			status = __bt_dleaf(t, NULL, h, c->pg.index);
+
+			if (NEXTINDEX(h) == 0 && status == RET_SUCCESS) {
+				if (__bt_pdelete(t, h))
+					return (RET_ERROR);
+			} else
+				mpool_put(t->bt_mp,
+				    h, status == RET_SUCCESS ? MPOOL_DIRTY : 0);
+			break;
+		}
+		/* FALLTHROUGH */
+	default:
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+	if (status == RET_SUCCESS)
+		F_SET(t, B_MODIFIED);
+	return (status);
+}
+
+/*
+ * __bt_stkacq --
+ *	Acquire a stack so we can delete a cursor entry.
+ *
+ * Parameters:
+ *	  t:	tree
+ *	 hp:	pointer to current, pinned PAGE pointer
+ *	  c:	pointer to the cursor
+ *
+ * Returns:
+ *	0 on success, 1 on failure
+ */
+static int
+__bt_stkacq(t, hp, c)
+	BTREE *t;
+	PAGE **hp;
+	CURSOR *c;
+{
+	BINTERNAL *bi;
+	EPG *e;
+	EPGNO *parent;
+	PAGE *h;
+	indx_t idx;
+	db_pgno_t pgno;
+	recno_t nextpg, prevpg;
+	int exact, level;
+	
+	/*
+	 * Find the first occurrence of the key in the tree.  Toss the
+	 * currently locked page so we don't hit an already-locked page.
+	 */
+	h = *hp;
+	mpool_put(t->bt_mp, h, 0);
+	if ((e = __bt_search(t, &c->key, &exact)) == NULL)
+		return (1);
+	h = e->page;
+
+	/* See if we got it in one shot. */
+	if (h->pgno == c->pg.pgno)
+		goto ret;
+
+	/*
+	 * Move right, looking for the page.  At each move we have to move
+	 * up the stack until we don't have to move to the next page.  If
+	 * we have to change pages at an internal level, we have to fix the
+	 * stack back up.
+	 */
+	while (h->pgno != c->pg.pgno) {
+		if ((nextpg = h->nextpg) == P_INVALID)
+			break;
+		mpool_put(t->bt_mp, h, 0);
+
+		/* Move up the stack. */
+		for (level = 0; (parent = BT_POP(t)) != NULL; ++level) {
+			/* Get the parent page. */
+			if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+				return (1);
+
+			/* Move to the next index. */
+			if (parent->index != NEXTINDEX(h) - 1) {
+				idx = parent->index + 1;
+				BT_PUSH(t, h->pgno, idx);
+				break;
+			}
+			mpool_put(t->bt_mp, h, 0);
+		}
+
+		/* Restore the stack. */
+		while (level--) {
+			/* Push the next level down onto the stack. */
+			bi = GETBINTERNAL(h, idx);
+			pgno = bi->pgno;
+			BT_PUSH(t, pgno, 0);
+
+			/* Lose the currently pinned page. */
+			mpool_put(t->bt_mp, h, 0);
+
+			/* Get the next level down. */
+			if ((h = mpool_get(t->bt_mp, pgno, 0)) == NULL)
+				return (1);
+			idx = 0;
+		}
+		mpool_put(t->bt_mp, h, 0);
+		if ((h = mpool_get(t->bt_mp, nextpg, 0)) == NULL)
+			return (1);
+	}
+
+	if (h->pgno == c->pg.pgno)
+		goto ret;
+
+	/* Reacquire the original stack. */
+	mpool_put(t->bt_mp, h, 0);
+	if ((e = __bt_search(t, &c->key, &exact)) == NULL)
+		return (1);
+	h = e->page;
+
+	/*
+	 * Move left, looking for the page.  At each move we have to move
+	 * up the stack until we don't have to change pages to move to the
+	 * next page.  If we have to change pages at an internal level, we
+	 * have to fix the stack back up.
+	 */
+	while (h->pgno != c->pg.pgno) {
+		if ((prevpg = h->prevpg) == P_INVALID)
+			break;
+		mpool_put(t->bt_mp, h, 0);
+
+		/* Move up the stack. */
+		for (level = 0; (parent = BT_POP(t)) != NULL; ++level) {
+			/* Get the parent page. */
+			if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+				return (1);
+
+			/* Move to the next index. */
+			if (parent->index != 0) {
+				idx = parent->index - 1;
+				BT_PUSH(t, h->pgno, idx);
+				break;
+			}
+			mpool_put(t->bt_mp, h, 0);
+		}
+
+		/* Restore the stack. */
+		while (level--) {
+			/* Push the next level down onto the stack. */
+			bi = GETBINTERNAL(h, idx);
+			pgno = bi->pgno;
+
+			/* Lose the currently pinned page. */
+			mpool_put(t->bt_mp, h, 0);
+
+			/* Get the next level down. */
+			if ((h = mpool_get(t->bt_mp, pgno, 0)) == NULL)
+				return (1);
+
+			idx = NEXTINDEX(h) - 1;
+			BT_PUSH(t, pgno, idx);
+		}
+		mpool_put(t->bt_mp, h, 0);
+		if ((h = mpool_get(t->bt_mp, prevpg, 0)) == NULL)
+			return (1);
+	}
+	
+
+ret:	mpool_put(t->bt_mp, h, 0);
+	return ((*hp = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL);
+}
+
+/*
+ * __bt_bdelete --
+ *	Delete all key/data pairs matching the specified key.
+ *
+ * Parameters:
+ *	  t:	tree
+ *	key:	key to delete
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+static int
+__bt_bdelete(t, key)
+	BTREE *t;
+	const DBT *key;
+{
+	EPG *e;
+	PAGE *h;
+	int deleted, exact, redo;
+
+	deleted = 0;
+
+	/* Find any matching record; __bt_search pins the page. */
+loop:	if ((e = __bt_search(t, key, &exact)) == NULL)
+		return (deleted ? RET_SUCCESS : RET_ERROR);
+	if (!exact) {
+		mpool_put(t->bt_mp, e->page, 0);
+		return (deleted ? RET_SUCCESS : RET_SPECIAL);
+	}
+
+	/*
+	 * Delete forward, then delete backward, from the found key.  If
+	 * there are duplicates and we reach either side of the page, do
+	 * the key search again, so that we get them all.
+	 */
+	redo = 0;
+	h = e->page;
+	do {
+		if (__bt_dleaf(t, key, h, e->index)) {
+			mpool_put(t->bt_mp, h, 0);
+			return (RET_ERROR);
+		}
+		if (F_ISSET(t, B_NODUPS)) {
+			if (NEXTINDEX(h) == 0) {
+				if (__bt_pdelete(t, h))
+					return (RET_ERROR);
+			} else
+				mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+			return (RET_SUCCESS);
+		}
+		deleted = 1;
+	} while (e->index < NEXTINDEX(h) && __bt_cmp(t, key, e) == 0);
+
+	/* Check for right-hand edge of the page. */
+	if (e->index == NEXTINDEX(h))
+		redo = 1;
+
+	/* Delete from the key to the beginning of the page. */
+	while (e->index-- > 0) {
+		if (__bt_cmp(t, key, e) != 0)
+			break;
+		if (__bt_dleaf(t, key, h, e->index) == RET_ERROR) {
+			mpool_put(t->bt_mp, h, 0);
+			return (RET_ERROR);
+		}
+		if (e->index == 0)
+			redo = 1;
+	}
+
+	/* Check for an empty page. */
+	if (NEXTINDEX(h) == 0) {
+		if (__bt_pdelete(t, h))
+			return (RET_ERROR);
+		goto loop;
+	}
+
+	/* Put the page. */
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+	if (redo)
+		goto loop;
+	return (RET_SUCCESS);
+}
+
+/*
+ * __bt_pdelete --
+ *	Delete a single page from the tree.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	leaf page
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ *
+ * Side-effects:
+ *	mpool_put's the page
+ */
+static int
+__bt_pdelete(t, h)
+	BTREE *t;
+	PAGE *h;
+{
+	BINTERNAL *bi;
+	PAGE *pg;
+	EPGNO *parent;
+	indx_t cnt, idx, *ip, offset;
+	u_int32_t nksize;
+	char *from;
+
+	/*
+	 * Walk the parent page stack -- a LIFO stack of the pages that were
+	 * traversed when we searched for the page where the delete occurred.
+	 * Each stack entry is a page number and a page index offset.  The
+	 * offset is for the page traversed on the search.  We've just deleted
+	 * a page, so we have to delete the key from the parent page.
+	 *
+	 * If the delete from the parent page makes it empty, this process may
+	 * continue all the way up the tree.  We stop if we reach the root page
+	 * (which is never deleted, it's just not worth the effort) or if the
+	 * delete does not empty the page.
+	 */
+	while ((parent = BT_POP(t)) != NULL) {
+		/* Get the parent page. */
+		if ((pg = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+			return (RET_ERROR);
+		
+		idx = parent->index;
+		bi = GETBINTERNAL(pg, idx);
+
+		/* Free any overflow pages. */
+		if (bi->flags & P_BIGKEY &&
+		    __ovfl_delete(t, bi->bytes) == RET_ERROR) {
+			mpool_put(t->bt_mp, pg, 0);
+			return (RET_ERROR);
+		}
+
+		/*
+		 * Free the parent if it has only the one key and it's not the
+		 * root page. If it's the rootpage, turn it back into an empty
+		 * leaf page.
+		 */
+		if (NEXTINDEX(pg) == 1)
+			if (pg->pgno == P_ROOT) {
+				pg->lower = BTDATAOFF;
+				pg->upper = t->bt_psize;
+				pg->flags = P_BLEAF;
+			} else {
+				if (__bt_relink(t, pg) || __bt_free(t, pg))
+					return (RET_ERROR);
+				continue;
+			}
+		else {
+			/* Pack remaining key items at the end of the page. */
+			nksize = NBINTERNAL(bi->ksize);
+			from = (char *)pg + pg->upper;
+			memmove(from + nksize, from, (char *)bi - from);
+			pg->upper += nksize;
+
+			/* Adjust indices' offsets, shift the indices down. */
+			offset = pg->linp[idx];
+			for (cnt = idx, ip = &pg->linp[0]; cnt--; ++ip)
+				if (ip[0] < offset)
+					ip[0] += nksize;
+			for (cnt = NEXTINDEX(pg) - idx; --cnt; ++ip)
+				ip[0] = ip[1] < offset ? ip[1] + nksize : ip[1];
+			pg->lower -= sizeof(indx_t);
+		}
+
+		mpool_put(t->bt_mp, pg, MPOOL_DIRTY);
+		break;
+	}
+
+	/* Free the leaf page, as long as it wasn't the root. */
+	if (h->pgno == P_ROOT) {
+		mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+		return (RET_SUCCESS);
+	}
+	return (__bt_relink(t, h) || __bt_free(t, h));
+}
+
+/*
+ * __bt_dleaf --
+ *	Delete a single record from a leaf page.
+ *
+ * Parameters:
+ *	t:	tree
+ *    key:	referenced key
+ *	h:	page
+ *	idx:	index on page to delete
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__bt_dleaf(t, key, h, idx)
+	BTREE *t;
+	const DBT *key;
+	PAGE *h;
+	u_int idx;
+{
+	BLEAF *bl;
+	indx_t cnt, *ip, offset;
+	u_int32_t nbytes;
+	void *to;
+	char *from;
+
+	/* If this record is referenced by the cursor, delete the cursor. */
+	if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+	    !F_ISSET(&t->bt_cursor, CURS_ACQUIRE) &&
+	    t->bt_cursor.pg.pgno == h->pgno && t->bt_cursor.pg.index == idx &&
+	    __bt_curdel(t, key, h, idx))
+		return (RET_ERROR);
+
+	/* If the entry uses overflow pages, make them available for reuse. */
+	to = bl = GETBLEAF(h, idx);
+	if (bl->flags & P_BIGKEY && __ovfl_delete(t, bl->bytes) == RET_ERROR)
+		return (RET_ERROR);
+	if (bl->flags & P_BIGDATA &&
+	    __ovfl_delete(t, bl->bytes + bl->ksize) == RET_ERROR)
+		return (RET_ERROR);
+
+	/* Pack the remaining key/data items at the end of the page. */
+	nbytes = NBLEAF(bl);
+	from = (char *)h + h->upper;
+	memmove(from + nbytes, from, (char *)to - from);
+	h->upper += nbytes;
+
+	/* Adjust the indices' offsets, shift the indices down. */
+	offset = h->linp[idx];
+	for (cnt = idx, ip = &h->linp[0]; cnt--; ++ip)
+		if (ip[0] < offset)
+			ip[0] += nbytes;
+	for (cnt = NEXTINDEX(h) - idx; --cnt; ++ip)
+		ip[0] = ip[1] < offset ? ip[1] + nbytes : ip[1];
+	h->lower -= sizeof(indx_t);
+
+	/* If the cursor is on this page, adjust it as necessary. */
+	if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+	    !F_ISSET(&t->bt_cursor, CURS_ACQUIRE) &&
+	    t->bt_cursor.pg.pgno == h->pgno && t->bt_cursor.pg.index > idx)
+		--t->bt_cursor.pg.index;
+
+	return (RET_SUCCESS);
+}
+
+/*
+ * __bt_curdel --
+ *	Delete the cursor.
+ *
+ * Parameters:
+ *	t:	tree
+ *    key:	referenced key (or NULL)
+ *	h:	page
+ *  idx:	idx on page to delete
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+static int
+__bt_curdel(t, key, h, idx)
+	BTREE *t;
+	const DBT *key;
+	PAGE *h;
+	u_int idx;
+{
+	CURSOR *c;
+	EPG e;
+	PAGE *pg;
+	int curcopy, status;
+
+	/*
+	 * If there are duplicates, move forward or backward to one.
+	 * Otherwise, copy the key into the cursor area.
+	 */
+	c = &t->bt_cursor;
+	F_CLR(c, CURS_AFTER | CURS_BEFORE | CURS_ACQUIRE);
+
+	curcopy = 0;
+	if (!F_ISSET(t, B_NODUPS)) {
+		/*
+		 * We're going to have to do comparisons.  If we weren't
+		 * provided a copy of the key, i.e. the user is deleting
+		 * the current cursor position, get one.
+		 */
+		if (key == NULL) {
+			e.page = h;
+			e.index = idx;
+			if ((status = __bt_ret(t, &e,
+			    &c->key, &c->key, NULL, NULL, 1)) != RET_SUCCESS)
+				return (status);
+			curcopy = 1;
+			key = &c->key;
+		}
+		/* Check previous key, if not at the beginning of the page. */
+		if (idx > 0) { 
+			e.page = h;
+			e.index = idx - 1;
+			if (__bt_cmp(t, key, &e) == 0) {
+				F_SET(c, CURS_BEFORE);
+				goto dup2;
+			}
+		}
+		/* Check next key, if not at the end of the page. */
+		if (idx < NEXTINDEX(h) - 1) {
+			e.page = h;
+			e.index = idx + 1;
+			if (__bt_cmp(t, key, &e) == 0) {
+				F_SET(c, CURS_AFTER);
+				goto dup2;
+			}
+		}
+		/* Check previous key if at the beginning of the page. */
+		if (idx == 0 && h->prevpg != P_INVALID) {
+			if ((pg = mpool_get(t->bt_mp, h->prevpg, 0)) == NULL)
+				return (RET_ERROR);
+			e.page = pg;
+			e.index = NEXTINDEX(pg) - 1;
+			if (__bt_cmp(t, key, &e) == 0) {
+				F_SET(c, CURS_BEFORE);
+				goto dup1;
+			}
+			mpool_put(t->bt_mp, pg, 0);
+		}
+		/* Check next key if at the end of the page. */
+		if (idx == NEXTINDEX(h) - 1 && h->nextpg != P_INVALID) {
+			if ((pg = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL)
+				return (RET_ERROR);
+			e.page = pg;
+			e.index = 0;
+			if (__bt_cmp(t, key, &e) == 0) {
+				F_SET(c, CURS_AFTER);
+dup1:				mpool_put(t->bt_mp, pg, 0);
+dup2:				c->pg.pgno = e.page->pgno;
+				c->pg.index = e.index;
+				return (RET_SUCCESS);
+			}
+			mpool_put(t->bt_mp, pg, 0);
+		}
+	}
+	e.page = h;
+	e.index = idx;
+	if (curcopy || (status =
+	    __bt_ret(t, &e, &c->key, &c->key, NULL, NULL, 1)) == RET_SUCCESS) {
+		F_SET(c, CURS_ACQUIRE);
+		return (RET_SUCCESS);
+	}
+	return (status);
+}
+
+/*
+ * __bt_relink --
+ *	Link around a deleted page.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	page to be deleted
+ */
+static int
+__bt_relink(t, h)
+	BTREE *t;
+	PAGE *h;
+{
+	PAGE *pg;
+
+	if (h->nextpg != P_INVALID) {
+		if ((pg = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL)
+			return (RET_ERROR);
+		pg->prevpg = h->prevpg;
+		mpool_put(t->bt_mp, pg, MPOOL_DIRTY);
+	}
+	if (h->prevpg != P_INVALID) {
+		if ((pg = mpool_get(t->bt_mp, h->prevpg, 0)) == NULL)
+			return (RET_ERROR);
+		pg->nextpg = h->nextpg;
+		mpool_put(t->bt_mp, pg, MPOOL_DIRTY);
+	}
+	return (0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_get.c b/src/plugins/kdb/db2/libdb2/btree/bt_get.c
new file mode 100644
index 0000000000..b6318211a1
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_get.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_get.c	8.6 (Berkeley) 7/20/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+/*
+ * __BT_GET -- Get a record from the btree.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key to find
+ *	data:	data to return
+ *	flag:	currently unused
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+int
+__bt_get(dbp, key, data, flags)
+	const DB *dbp;
+	const DBT *key;
+	DBT *data;
+	u_int flags;
+{
+	BTREE *t;
+	EPG *e;
+	int exact, status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* Get currently doesn't take any flags. */
+	if (flags) {
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	if ((e = __bt_search(t, key, &exact)) == NULL)
+		return (RET_ERROR);
+	if (!exact) {
+		mpool_put(t->bt_mp, e->page, 0);
+		return (RET_SPECIAL);
+	}
+
+	status = __bt_ret(t, e, NULL, NULL, data, &t->bt_rdata, 0);
+
+	/*
+	 * If the user is doing concurrent access, we copied the
+	 * key/data, toss the page.
+	 */
+	if (F_ISSET(t, B_DB_LOCK))
+		mpool_put(t->bt_mp, e->page, 0);
+	else
+		t->bt_pinned = e->page;
+	return (status);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_open.c b/src/plugins/kdb/db2/libdb2/btree/bt_open.c
new file mode 100644
index 0000000000..3e4c67a4bc
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_open.c
@@ -0,0 +1,476 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_open.c	8.11 (Berkeley) 11/2/95";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Implementation of btree access method for 4.4BSD.
+ *
+ * The design here was originally based on that of the btree access method
+ * used in the Postgres database system at UC Berkeley.  This implementation
+ * is wholly independent of the Postgres code.
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+#ifdef DEBUG
+#undef	MINPSIZE
+#define	MINPSIZE	128
+#endif
+
+static int byteorder __P((void));
+static int nroot __P((BTREE *));
+static int tmp __P((void));
+
+/*
+ * __BT_OPEN -- Open a btree.
+ *
+ * Creates and fills a DB struct, and calls the routine that actually
+ * opens the btree.
+ *
+ * Parameters:
+ *	fname:	filename (NULL for in-memory trees)
+ *	flags:	open flag bits
+ *	mode:	open permission bits
+ *	b:	BTREEINFO pointer
+ *
+ * Returns:
+ *	NULL on failure, pointer to DB on success.
+ *
+ */
+DB *
+__bt_open(fname, flags, mode, openinfo, dflags)
+	const char *fname;
+	int flags, mode, dflags;
+	const BTREEINFO *openinfo;
+{
+	struct stat sb;
+	BTMETA m;
+	BTREE *t;
+	BTREEINFO b;
+	DB *dbp;
+	db_pgno_t ncache;
+	ssize_t nr;
+	int machine_lorder;
+
+	t = NULL;
+
+	/*
+	 * Intention is to make sure all of the user's selections are okay
+	 * here and then use them without checking.  Can't be complete, since
+	 * we don't know the right page size, lorder or flags until the backing
+	 * file is opened.  Also, the file's page size can cause the cachesize
+	 * to change.
+	 */
+	machine_lorder = byteorder();
+	if (openinfo) {
+		b = *openinfo;
+
+		/* Flags: R_DUP. */
+		if (b.flags & ~(R_DUP))
+			goto einval;
+
+		/*
+		 * Page size must be indx_t aligned and >= MINPSIZE.  Default
+		 * page size is set farther on, based on the underlying file
+		 * transfer size.
+		 */
+		if (b.psize &&
+		    (b.psize < MINPSIZE || b.psize > MAX_PAGE_OFFSET + 1 ||
+		    b.psize & (sizeof(indx_t) - 1)))
+			goto einval;
+
+		/* Minimum number of keys per page; absolute minimum is 2. */
+		if (b.minkeypage) {
+			if (b.minkeypage < 2)
+				goto einval;
+		} else
+			b.minkeypage = DEFMINKEYPAGE;
+
+		/* If no comparison, use default comparison and prefix. */
+		if (b.compare == NULL) {
+			b.compare = __bt_defcmp;
+			if (b.prefix == NULL)
+				b.prefix = __bt_defpfx;
+		}
+
+		if (b.lorder == 0)
+			b.lorder = machine_lorder;
+	} else {
+		b.compare = __bt_defcmp;
+		b.cachesize = 0;
+		b.flags = 0;
+		b.lorder = machine_lorder;
+		b.minkeypage = DEFMINKEYPAGE;
+		b.prefix = __bt_defpfx;
+		b.psize = 0;
+	}
+
+	/* Check for the ubiquitous PDP-11. */
+	if (b.lorder != DB_BIG_ENDIAN && b.lorder != DB_LITTLE_ENDIAN)
+		goto einval;
+
+	/* Allocate and initialize DB and BTREE structures. */
+	if ((t = (BTREE *)malloc(sizeof(BTREE))) == NULL)
+		goto err;
+	memset(t, 0, sizeof(BTREE));
+	t->bt_fd = -1;			/* Don't close unopened fd on error. */
+	t->bt_lorder = b.lorder;
+	t->bt_order = NOT;
+	t->bt_cmp = b.compare;
+	t->bt_pfx = b.prefix;
+	t->bt_rfd = -1;
+
+	if ((t->bt_dbp = dbp = (DB *)malloc(sizeof(DB))) == NULL)
+		goto err;
+	memset(t->bt_dbp, 0, sizeof(DB));
+	if (t->bt_lorder != machine_lorder)
+		F_SET(t, B_NEEDSWAP);
+
+	dbp->type = DB_BTREE;
+	dbp->internal = t;
+	dbp->close = __bt_close;
+	dbp->del = __bt_delete;
+	dbp->fd = __bt_fd;
+	dbp->get = __bt_get;
+	dbp->put = __bt_put;
+	dbp->seq = __bt_seq;
+	dbp->sync = __bt_sync;
+
+	/*
+	 * If no file name was supplied, this is an in-memory btree and we
+	 * open a backing temporary file.  Otherwise, it's a disk-based tree.
+	 */
+	if (fname) {
+		switch (flags & O_ACCMODE) {
+		case O_RDONLY:
+			F_SET(t, B_RDONLY);
+			break;
+		case O_RDWR:
+			break;
+		case O_WRONLY:
+		default:
+			goto einval;
+		}
+		
+		if ((t->bt_fd = open(fname, flags | O_BINARY, mode)) < 0)
+			goto err;
+
+	} else {
+		if ((flags & O_ACCMODE) != O_RDWR)
+			goto einval;
+		if ((t->bt_fd = tmp()) == -1)
+			goto err;
+		F_SET(t, B_INMEM);
+	}
+
+	if (fcntl(t->bt_fd, F_SETFD, 1) == -1)
+		goto err;
+
+	if (fstat(t->bt_fd, &sb))
+		goto err;
+	if (sb.st_size) {
+		if ((nr = read(t->bt_fd, &m, sizeof(BTMETA))) < 0)
+			goto err;
+		if (nr != sizeof(BTMETA))
+			goto eftype;
+
+		/*
+		 * Read in the meta-data.  This can change the notion of what
+		 * the lorder, page size and flags are, and, when the page size
+		 * changes, the cachesize value can change too.  If the user
+		 * specified the wrong byte order for an existing database, we
+		 * don't bother to return an error, we just clear the NEEDSWAP
+		 * bit.
+		 */
+		if (m.magic == BTREEMAGIC)
+			F_CLR(t, B_NEEDSWAP);
+		else {
+			F_SET(t, B_NEEDSWAP);
+			M_32_SWAP(m.magic);
+			M_32_SWAP(m.version);
+			M_32_SWAP(m.psize);
+			M_32_SWAP(m.free);
+			M_32_SWAP(m.nrecs);
+			M_32_SWAP(m.flags);
+		}
+		if (m.magic != BTREEMAGIC || m.version != BTREEVERSION)
+			goto eftype;
+		if (m.psize < MINPSIZE || m.psize > MAX_PAGE_OFFSET + 1 ||
+		    m.psize & (sizeof(indx_t) - 1))
+			goto eftype;
+		if (m.flags & ~SAVEMETA)
+			goto eftype;
+		b.psize = m.psize;
+		F_SET(t, m.flags);
+		t->bt_free = m.free;
+		t->bt_nrecs = m.nrecs;
+	} else {
+		/*
+		 * Set the page size to the best value for I/O to this file.
+		 * Don't overflow the page offset type.
+		 */
+		if (b.psize == 0) {
+			b.psize = sb.st_blksize;
+			if (b.psize < MINPSIZE)
+				b.psize = MINPSIZE;
+			if (b.psize > MAX_PAGE_OFFSET + 1)
+				b.psize = MAX_PAGE_OFFSET + 1;
+		}
+
+		/* Set flag if duplicates permitted. */
+		if (!(b.flags & R_DUP))
+			F_SET(t, B_NODUPS);
+
+		t->bt_free = P_INVALID;
+		t->bt_nrecs = 0;
+		F_SET(t, B_METADIRTY);
+	}
+
+	t->bt_psize = b.psize;
+
+	/* Set the cache size; must be a multiple of the page size. */
+	if (b.cachesize && b.cachesize & (b.psize - 1))
+		b.cachesize += (~b.cachesize & (b.psize - 1)) + 1;
+	if (b.cachesize < b.psize * MINCACHE)
+		b.cachesize = b.psize * MINCACHE;
+
+	/* Calculate number of pages to cache. */
+	ncache = (b.cachesize + t->bt_psize - 1) / t->bt_psize;
+
+	/*
+	 * The btree data structure requires that at least two keys can fit on
+	 * a page, but other than that there's no fixed requirement.  The user
+	 * specified a minimum number per page, and we translated that into the
+	 * number of bytes a key/data pair can use before being placed on an
+	 * overflow page.  This calculation includes the page header, the size
+	 * of the index referencing the leaf item and the size of the leaf item
+	 * structure.  Also, don't let the user specify a minkeypage such that
+	 * a key/data pair won't fit even if both key and data are on overflow
+	 * pages.
+	 */
+	t->bt_ovflsize = (t->bt_psize - BTDATAOFF) / b.minkeypage -
+	    (sizeof(indx_t) + NBLEAFDBT(0, 0));
+	if (t->bt_ovflsize < NBLEAFDBT(NOVFLSIZE, NOVFLSIZE) + sizeof(indx_t))
+		t->bt_ovflsize =
+		    NBLEAFDBT(NOVFLSIZE, NOVFLSIZE) + sizeof(indx_t);
+
+	/* Initialize the buffer pool. */
+	if ((t->bt_mp =
+	    mpool_open(NULL, t->bt_fd, t->bt_psize, ncache)) == NULL)
+		goto err;
+	if (!F_ISSET(t, B_INMEM))
+		mpool_filter(t->bt_mp, __bt_pgin, __bt_pgout, t);
+
+	/* Create a root page if new tree. */
+	if (nroot(t) == RET_ERROR)
+		goto err;
+
+	/* Global flags. */
+	if (dflags & DB_LOCK)
+		F_SET(t, B_DB_LOCK);
+	if (dflags & DB_SHMEM)
+		F_SET(t, B_DB_SHMEM);
+	if (dflags & DB_TXN)
+		F_SET(t, B_DB_TXN);
+
+	return (dbp);
+
+einval:	errno = EINVAL;
+	goto err;
+
+eftype:	errno = EFTYPE;
+	goto err;
+
+err:	if (t) {
+		if (t->bt_dbp)
+			free(t->bt_dbp);
+		if (t->bt_fd != -1)
+			(void)close(t->bt_fd);
+		free(t);
+	}
+	return (NULL);
+}
+
+/*
+ * NROOT -- Create the root of a new tree.
+ *
+ * Parameters:
+ *	t:	tree
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+static int
+nroot(t)
+	BTREE *t;
+{
+	PAGE *meta, *root;
+	db_pgno_t npg;
+
+	if ((root = mpool_get(t->bt_mp, 1, 0)) != NULL) {
+		if (root->lower == 0 &&
+		    root->pgno == 0 &&
+		    root->linp[0] == 0) {
+			mpool_delete(t->bt_mp, root);
+			errno = EINVAL;
+		} else {
+			mpool_put(t->bt_mp, root, 0);
+			return (RET_SUCCESS);
+		}
+	}
+	if (errno != EINVAL)		/* It's OK to not exist. */
+		return (RET_ERROR);
+	errno = 0;
+
+	if ((meta = mpool_new(t->bt_mp, &npg, MPOOL_PAGE_NEXT)) == NULL)
+		return (RET_ERROR);
+
+	if ((root = mpool_new(t->bt_mp, &npg, MPOOL_PAGE_NEXT)) == NULL)
+		return (RET_ERROR);
+
+	if (npg != P_ROOT)
+		return (RET_ERROR);
+	root->pgno = npg;
+	root->prevpg = root->nextpg = P_INVALID;
+	root->lower = BTDATAOFF;
+	root->upper = t->bt_psize;
+	root->flags = P_BLEAF;
+	memset(meta, 0, t->bt_psize);
+	mpool_put(t->bt_mp, meta, MPOOL_DIRTY);
+	mpool_put(t->bt_mp, root, MPOOL_DIRTY);
+	return (RET_SUCCESS);
+}
+
+static int
+tmp()
+{
+#ifdef SIG_BLOCK
+	sigset_t set, oset;
+#else
+	int oset;
+#endif
+	int fd;
+	char *envtmp;
+	char path[MAXPATHLEN];
+	static char fn[] = "/bt.XXXXXX";
+
+	envtmp = getenv("TMPDIR");
+
+	/* this used to be done with snprintf(), but since snprintf
+	   isn't in most operating systems, and overflow checking in
+	   this case is easy, this is what is done */
+
+	if (envtmp && ((strlen(envtmp)+sizeof(fn)+1) > sizeof(path)))
+	    return(-1);
+
+	(void)sprintf(path, "%s%s", (envtmp ? envtmp : "/tmp"), fn);
+
+#ifdef SIG_BLOCK
+	(void)sigfillset(&set);
+	(void)sigprocmask(SIG_BLOCK, &set, &oset);
+#else
+	oset = sigblock(~0);
+#endif
+	if ((fd = mkstemp(path)) != -1)
+		(void)unlink(path);
+#ifdef SIG_BLOCK
+	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
+#else
+	sigsetmask(oset);
+#endif
+#ifdef __CYGWIN32__
+      /* Ensure the fd is in binary mode. */
+      setmode(fd, O_BINARY);
+#endif /* __CYGWIN32__ */
+
+	return(fd);
+}
+
+static int
+byteorder()
+{
+	u_int32_t x;
+	u_char *p;
+
+	x = 0x01020304;
+	p = (u_char *)&x;
+	switch (*p) {
+	case 1:
+		return (DB_BIG_ENDIAN);
+	case 4:
+		return (DB_LITTLE_ENDIAN);
+	default:
+		return (0);
+	}
+}
+
+int
+__bt_fd(dbp)
+        const DB *dbp;
+{
+	BTREE *t;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* In-memory database can't have a file descriptor. */
+	if (F_ISSET(t, B_INMEM)) {
+		errno = ENOENT;
+		return (-1);
+	}
+	return (t->bt_fd);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_overflow.c b/src/plugins/kdb/db2/libdb2/btree/bt_overflow.c
new file mode 100644
index 0000000000..8b1f597912
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_overflow.c
@@ -0,0 +1,228 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_overflow.c	8.5 (Berkeley) 7/16/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+/*
+ * Big key/data code.
+ *
+ * Big key and data entries are stored on linked lists of pages.  The initial
+ * reference is byte string stored with the key or data and is the page number
+ * and size.  The actual record is stored in a chain of pages linked by the
+ * nextpg field of the PAGE header.
+ *
+ * The first page of the chain has a special property.  If the record is used
+ * by an internal page, it cannot be deleted and the P_PRESERVE bit will be set
+ * in the header.
+ *
+ * XXX
+ * A single DBT is written to each chain, so a lot of space on the last page
+ * is wasted.  This is a fairly major bug for some data sets.
+ */
+
+/*
+ * __OVFL_GET -- Get an overflow key/data item.
+ *
+ * Parameters:
+ *	t:	tree
+ *	p:	pointer to { db_pgno_t, u_int32_t }
+ *	buf:	storage address
+ *	bufsz:	storage size
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__ovfl_get(t, p, ssz, buf, bufsz)
+	BTREE *t;
+	void *p;
+	size_t *ssz;
+	void **buf;
+	size_t *bufsz;
+{
+	PAGE *h;
+	db_pgno_t pg;
+	size_t nb, plen;
+	u_int32_t sz;
+
+	memmove(&pg, p, sizeof(db_pgno_t));
+	memmove(&sz, (char *)p + sizeof(db_pgno_t), sizeof(u_int32_t));
+	*ssz = sz;
+
+#ifdef DEBUG
+	if (pg == P_INVALID || sz == 0)
+		abort();
+#endif
+	/* Make the buffer bigger as necessary. */
+	if (*bufsz < sz) {
+		*buf = (char *)(*buf == NULL ? malloc(sz) : realloc(*buf, sz));
+		if (*buf == NULL)
+			return (RET_ERROR);
+		*bufsz = sz;
+	}
+
+	/*
+	 * Step through the linked list of pages, copying the data on each one
+	 * into the buffer.  Never copy more than the data's length.
+	 */
+	plen = t->bt_psize - BTDATAOFF;
+	for (p = *buf;; p = (char *)p + nb, pg = h->nextpg) {
+		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+			return (RET_ERROR);
+
+		nb = MIN(sz, plen);
+		memmove(p, (char *)h + BTDATAOFF, nb);
+		mpool_put(t->bt_mp, h, 0);
+
+		if ((sz -= nb) == 0)
+			break;
+	}
+	return (RET_SUCCESS);
+}
+
+/*
+ * __OVFL_PUT -- Store an overflow key/data item.
+ *
+ * Parameters:
+ *	t:	tree
+ *	data:	DBT to store
+ *	pgno:	storage page number
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__ovfl_put(t, dbt, pg)
+	BTREE *t;
+	const DBT *dbt;
+	db_pgno_t *pg;
+{
+	PAGE *h, *last;
+	void *p;
+	db_pgno_t npg;
+	size_t nb, plen;
+	u_int32_t sz;
+
+	/*
+	 * Allocate pages and copy the key/data record into them.  Store the
+	 * number of the first page in the chain.
+	 */
+	plen = t->bt_psize - BTDATAOFF;
+	for (last = NULL, p = dbt->data, sz = dbt->size;;
+	    p = (char *)p + plen, last = h) {
+		if ((h = __bt_new(t, &npg)) == NULL)
+			return (RET_ERROR);
+
+		h->pgno = npg;
+		h->nextpg = h->prevpg = P_INVALID;
+		h->flags = P_OVERFLOW;
+		h->lower = h->upper = 0;
+
+		nb = MIN(sz, plen);
+		memmove((char *)h + BTDATAOFF, p, nb);
+
+		if (last) {
+			last->nextpg = h->pgno;
+			mpool_put(t->bt_mp, last, MPOOL_DIRTY);
+		} else
+			*pg = h->pgno;
+
+		if ((sz -= nb) == 0) {
+			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+			break;
+		}
+	}
+	return (RET_SUCCESS);
+}
+
+/*
+ * __OVFL_DELETE -- Delete an overflow chain.
+ *
+ * Parameters:
+ *	t:	tree
+ *	p:	pointer to { db_pgno_t, u_int32_t }
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__ovfl_delete(t, p)
+	BTREE *t;
+	void *p;
+{
+	PAGE *h;
+	db_pgno_t pg;
+	size_t plen;
+	u_int32_t sz;
+
+	memmove(&pg, p, sizeof(db_pgno_t));
+	memmove(&sz, (char *)p + sizeof(db_pgno_t), sizeof(u_int32_t));
+
+#ifdef DEBUG
+	if (pg == P_INVALID || sz == 0)
+		abort();
+#endif
+	if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+		return (RET_ERROR);
+
+	/* Don't delete chains used by internal pages. */
+	if (h->flags & P_PRESERVE) {
+		mpool_put(t->bt_mp, h, 0);
+		return (RET_SUCCESS);
+	}
+
+	/* Step through the chain, calling the free routine for each page. */
+	for (plen = t->bt_psize - BTDATAOFF;; sz -= plen) {
+		pg = h->nextpg;
+		__bt_free(t, h);
+		if (sz <= plen)
+			break;
+		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+			return (RET_ERROR);
+	}
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_page.c b/src/plugins/kdb/db2/libdb2/btree/bt_page.c
new file mode 100644
index 0000000000..3663cf7f93
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_page.c
@@ -0,0 +1,100 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_page.c	8.4 (Berkeley) 11/2/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <stdio.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+/*
+ * __bt_free --
+ *	Put a page on the freelist.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	page to free
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ *
+ * Side-effect:
+ *	mpool_put's the page.
+ */
+int
+__bt_free(t, h)
+	BTREE *t;
+	PAGE *h;
+{
+	/* Insert the page at the head of the free list. */
+	h->prevpg = P_INVALID;
+	h->nextpg = t->bt_free;
+	t->bt_free = h->pgno;
+	F_SET(t, B_METADIRTY);
+
+	/* Make sure the page gets written back. */
+	return (mpool_put(t->bt_mp, h, MPOOL_DIRTY));
+}
+
+/*
+ * __bt_new --
+ *	Get a new page, preferably from the freelist.
+ *
+ * Parameters:
+ *	t:	tree
+ *	npg:	storage for page number.
+ *
+ * Returns:
+ *	Pointer to a page, NULL on error.
+ */
+PAGE *
+__bt_new(t, npg)
+	BTREE *t;
+	db_pgno_t *npg;
+{
+	PAGE *h;
+
+	if (t->bt_free != P_INVALID &&
+	    (h = mpool_get(t->bt_mp, t->bt_free, 0)) != NULL) {
+		*npg = t->bt_free;
+		t->bt_free = h->nextpg;
+		F_SET(t, B_METADIRTY);
+		return (h);
+	}
+	return (mpool_new(t->bt_mp, npg, MPOOL_PAGE_NEXT));
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_put.c b/src/plugins/kdb/db2/libdb2/btree/bt_put.c
new file mode 100644
index 0000000000..f75ca9295c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_put.c
@@ -0,0 +1,328 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_put.c	8.8 (Berkeley) 7/26/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static EPG *bt_fast __P((BTREE *, const DBT *, const DBT *, int *));
+
+/*
+ * __BT_PUT -- Add a btree item to the tree.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key
+ *	data:	data
+ *	flag:	R_NOOVERWRITE
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key is already in the
+ *	tree and R_NOOVERWRITE specified.
+ */
+int
+__bt_put(dbp, key, data, flags)
+	const DB *dbp;
+	DBT *key;
+	const DBT *data;
+	u_int flags;
+{
+	BTREE *t;
+	DBT tkey, tdata;
+	EPG *e = 0;
+	PAGE *h;
+	indx_t idx, nxtindex;
+	db_pgno_t pg;
+	u_int32_t nbytes;
+	int dflags, exact, status;
+	char *dest, db[NOVFLSIZE], kb[NOVFLSIZE];
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* Check for change to a read-only tree. */
+	if (F_ISSET(t, B_RDONLY)) {
+		errno = EPERM;
+		return (RET_ERROR);
+	}
+
+	switch (flags) {
+	case 0:
+	case R_NOOVERWRITE:
+		break;
+	case R_CURSOR:
+		/*
+		 * If flags is R_CURSOR, put the cursor.  Must already
+		 * have started a scan and not have already deleted it.
+		 */
+		if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+		    !F_ISSET(&t->bt_cursor,
+		        CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE))
+			break;
+		/* FALLTHROUGH */
+	default:
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	/*
+	 * If the key/data pair won't fit on a page, store it on overflow
+	 * pages.  Only put the key on the overflow page if the pair are
+	 * still too big after moving the data to an overflow page.
+	 *
+	 * XXX
+	 * If the insert fails later on, the overflow pages aren't recovered.
+	 */
+	dflags = 0;
+	if (key->size + data->size > t->bt_ovflsize) {
+		if (key->size > t->bt_ovflsize) {
+			u_int32_t yuck_this_is_gross_code;
+storekey:		if (__ovfl_put(t, key, &pg) == RET_ERROR)
+				return (RET_ERROR);
+			tkey.data = kb;
+			tkey.size = NOVFLSIZE;
+			memmove(kb, &pg, sizeof(db_pgno_t));
+			yuck_this_is_gross_code = key->size;
+			if (yuck_this_is_gross_code != key->size)
+				abort ();
+			memmove(kb + sizeof(db_pgno_t),
+				&yuck_this_is_gross_code, sizeof(u_int32_t));
+			dflags |= P_BIGKEY;
+			key = &tkey;
+		}
+		if (key->size + data->size > t->bt_ovflsize) {
+			u_int32_t yuck_this_is_gross_code = data->size;
+			if (__ovfl_put(t, data, &pg) == RET_ERROR)
+				return (RET_ERROR);
+			tdata.data = db;
+			tdata.size = NOVFLSIZE;
+			memmove(db, &pg, sizeof(db_pgno_t));
+			if (yuck_this_is_gross_code != data->size)
+				abort ();
+			memmove(db + sizeof(db_pgno_t),
+				&yuck_this_is_gross_code, sizeof(u_int32_t));
+			dflags |= P_BIGDATA;
+			data = &tdata;
+		}
+		if (key->size + data->size > t->bt_ovflsize)
+			goto storekey;
+	}
+
+	/* Replace the cursor. */
+	if (flags == R_CURSOR) {
+		if ((h = mpool_get(t->bt_mp, t->bt_cursor.pg.pgno, 0)) == NULL)
+			return (RET_ERROR);
+		idx = t->bt_cursor.pg.index;
+		goto delete;
+	}
+
+	/*
+	 * Find the key to delete, or, the location at which to insert.
+	 * Bt_fast and __bt_search both pin the returned page.
+	 */
+	if (t->bt_order == NOT || (e = bt_fast(t, key, data, &exact)) == NULL)
+		if ((e = __bt_search(t, key, &exact)) == NULL)
+			return (RET_ERROR);
+	h = e->page;
+	idx = e->index;
+
+	/*
+	 * Add the key/data pair to the tree.  If an identical key is already
+	 * in the tree, and R_NOOVERWRITE is set, an error is returned.  If
+	 * R_NOOVERWRITE is not set, the key is either added (if duplicates are
+	 * permitted) or an error is returned.
+	 */
+	switch (flags) {
+	case R_NOOVERWRITE:
+		if (!exact)
+			break;
+		mpool_put(t->bt_mp, h, 0);
+		return (RET_SPECIAL);
+	default:
+		if (!exact || !F_ISSET(t, B_NODUPS))
+			break;
+		/*
+		 * !!!
+		 * Note, the delete may empty the page, so we need to put a
+		 * new entry into the page immediately.
+		 */
+delete:		if (__bt_dleaf(t, key, h, idx) == RET_ERROR) {
+			mpool_put(t->bt_mp, h, 0);
+			return (RET_ERROR);
+		}
+		break;
+	}
+
+	/*
+	 * If not enough room, or the user has put a ceiling on the number of
+	 * keys permitted in the page, split the page.  The split code will
+	 * insert the key and data and unpin the current page.  If inserting
+	 * into the offset array, shift the pointers up.
+	 */
+	nbytes = NBLEAFDBT(key->size, data->size);
+	if (h->upper - h->lower < nbytes + sizeof(indx_t)) {
+		if ((status = __bt_split(t, h, key,
+		    data, dflags, nbytes, idx)) != RET_SUCCESS)
+			return (status);
+		goto success;
+	}
+
+	if (idx < (nxtindex = NEXTINDEX(h)))
+		memmove(h->linp + idx + 1, h->linp + idx,
+		    (nxtindex - idx) * sizeof(indx_t));
+	h->lower += sizeof(indx_t);
+
+	h->linp[idx] = h->upper -= nbytes;
+	dest = (char *)h + h->upper;
+	WR_BLEAF(dest, key, data, dflags);
+
+	/* If the cursor is on this page, adjust it as necessary. */
+	if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+	    !F_ISSET(&t->bt_cursor, CURS_ACQUIRE) &&
+	    t->bt_cursor.pg.pgno == h->pgno && t->bt_cursor.pg.index >= idx)
+		++t->bt_cursor.pg.index;
+
+	if (t->bt_order == NOT) {
+		if (h->nextpg == P_INVALID) {
+			if (idx == NEXTINDEX(h) - 1) {
+				t->bt_order = FORWARD;
+				t->bt_last.index = idx;
+				t->bt_last.pgno = h->pgno;
+			}
+		} else if (h->prevpg == P_INVALID) {
+			if (idx == 0) {
+				t->bt_order = BACK;
+				t->bt_last.index = 0;
+				t->bt_last.pgno = h->pgno;
+			}
+		}
+	}
+
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+success:
+	if (flags == R_SETCURSOR)
+		__bt_setcur(t, e->page->pgno, e->index);
+
+	F_SET(t, B_MODIFIED);
+	return (RET_SUCCESS);
+}
+
+#ifdef STATISTICS
+u_long bt_cache_hit, bt_cache_miss;
+#endif
+
+/*
+ * BT_FAST -- Do a quick check for sorted data.
+ *
+ * Parameters:
+ *	t:	tree
+ *	key:	key to insert
+ *
+ * Returns:
+ * 	EPG for new record or NULL if not found.
+ */
+static EPG *
+bt_fast(t, key, data, exactp)
+	BTREE *t;
+	const DBT *key, *data;
+	int *exactp;
+{
+	PAGE *h;
+	u_int32_t nbytes;
+	int cmp;
+
+	if ((h = mpool_get(t->bt_mp, t->bt_last.pgno, 0)) == NULL) {
+		t->bt_order = NOT;
+		return (NULL);
+	}
+	t->bt_cur.page = h;
+	t->bt_cur.index = t->bt_last.index;
+
+	/*
+	 * If won't fit in this page or have too many keys in this page,
+	 * have to search to get split stack.
+	 */
+	nbytes = NBLEAFDBT(key->size, data->size);
+	if (h->upper - h->lower < nbytes + sizeof(indx_t))
+		goto miss;
+
+	if (t->bt_order == FORWARD) {
+		if (t->bt_cur.page->nextpg != P_INVALID)
+			goto miss;
+		if (t->bt_cur.index != NEXTINDEX(h) - 1)
+			goto miss;
+		if ((cmp = __bt_cmp(t, key, &t->bt_cur)) < 0)
+			goto miss;
+		t->bt_last.index = cmp ? ++t->bt_cur.index : t->bt_cur.index;
+	} else {
+		if (t->bt_cur.page->prevpg != P_INVALID)
+			goto miss;
+		if (t->bt_cur.index != 0)
+			goto miss;
+		if ((cmp = __bt_cmp(t, key, &t->bt_cur)) > 0)
+			goto miss;
+		t->bt_last.index = 0;
+	}
+	*exactp = cmp == 0;
+#ifdef STATISTICS
+	++bt_cache_hit;
+#endif
+	return (&t->bt_cur);
+
+miss:
+#ifdef STATISTICS
+	++bt_cache_miss;
+#endif
+	t->bt_order = NOT;
+	mpool_put(t->bt_mp, h, 0);
+	return (NULL);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_search.c b/src/plugins/kdb/db2/libdb2/btree/bt_search.c
new file mode 100644
index 0000000000..de7ab126f9
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_search.c
@@ -0,0 +1,297 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_search.c	8.9 (Berkeley) 10/26/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <stdio.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static int __bt_snext __P((BTREE *, PAGE *, const DBT *, int *));
+static int __bt_sprev __P((BTREE *, PAGE *, const DBT *, int *));
+
+/*
+ * __bt_search --
+ *	Search a btree for a key.
+ *
+ * Parameters:
+ *	t:	tree to search
+ *	key:	key to find
+ *	exactp:	pointer to exact match flag
+ *
+ * Returns:
+ *	The EPG for matching record, if any, or the EPG for the location
+ *	of the key, if it were inserted into the tree, is entered into
+ *	the bt_cur field of the tree.  A pointer to the field is returned.
+ */
+EPG *
+__bt_search(t, key, exactp)
+	BTREE *t;
+	const DBT *key;
+	int *exactp;
+{
+	PAGE *h;
+	indx_t base, idx, lim;
+	db_pgno_t pg;
+	int cmp;
+
+	BT_CLR(t);
+	for (pg = P_ROOT;;) {
+		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+			return (NULL);
+
+		/* Do a binary search on the current page. */
+		t->bt_cur.page = h;
+		for (base = 0, lim = NEXTINDEX(h); lim; lim >>= 1) {
+			t->bt_cur.index = idx = base + (lim >> 1);
+			if ((cmp = __bt_cmp(t, key, &t->bt_cur)) == 0) {
+				if (h->flags & P_BLEAF) {
+					*exactp = 1;
+					return (&t->bt_cur);
+				}
+				goto next;
+			}
+			if (cmp > 0) {
+				base = idx + 1;
+				--lim;
+			}
+		}
+
+		/*
+		 * If it's a leaf page, we're almost done.  If no duplicates
+		 * are allowed, or we have an exact match, we're done.  Else,
+		 * it's possible that there were matching keys on this page,
+		 * which later deleted, and we're on a page with no matches
+		 * while there are matches on other pages.  If at the start or
+		 * end of a page, check the adjacent page.
+		 */
+		if (h->flags & P_BLEAF) {
+			if (!F_ISSET(t, B_NODUPS)) {
+				if (base == 0 &&
+				    h->prevpg != P_INVALID &&
+				    __bt_sprev(t, h, key, exactp))
+					return (&t->bt_cur);
+				if (base == NEXTINDEX(h) &&
+				    h->nextpg != P_INVALID &&
+				    __bt_snext(t, h, key, exactp))
+					return (&t->bt_cur);
+			}
+			*exactp = 0;
+			t->bt_cur.index = base;
+			return (&t->bt_cur);
+		}
+
+		/*
+		 * No match found.  Base is the smallest index greater than
+		 * key and may be zero or a last + 1 index.  If it's non-zero,
+		 * decrement by one, and record the internal page which should
+		 * be a parent page for the key.  If a split later occurs, the
+		 * inserted page will be to the right of the saved page.
+		 */
+		idx = base ? base - 1 : base;
+
+next:		BT_PUSH(t, h->pgno, idx);
+		pg = GETBINTERNAL(h, idx)->pgno;
+		mpool_put(t->bt_mp, h, 0);
+	}
+}
+
+/*
+ * __bt_snext --
+ *	Check for an exact match after the key.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	current page
+ *	key:	key
+ *	exactp:	pointer to exact match flag
+ *
+ * Returns:
+ *	If an exact match found.
+ */
+static int
+__bt_snext(t, h, key, exactp)
+	BTREE *t;
+	PAGE *h;
+	const DBT *key;
+	int *exactp;
+{
+	BINTERNAL *bi;
+	EPG e;
+	EPGNO *parent;
+	indx_t idx;
+	db_pgno_t pgno;
+	int level;
+
+	/*
+	 * Get the next page.  The key is either an exact
+	 * match, or not as good as the one we already have.
+	 */
+	if ((e.page = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL)
+		return (0);
+	e.index = 0;
+	if (__bt_cmp(t, key, &e) != 0) {
+		mpool_put(t->bt_mp, e.page, 0);
+		return (0);
+	}
+	mpool_put(t->bt_mp, h, 0);
+	t->bt_cur = e;
+	*exactp = 1;
+
+	/*
+	 * Adjust the stack for the movement.
+	 *
+	 * Move up the stack.
+	 */
+	for (level = 0; (parent = BT_POP(t)) != NULL; ++level) {
+		/* Get the parent page. */
+		if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+			return (0);
+
+		/* Move to the next index. */
+		if (parent->index != NEXTINDEX(h) - 1) {
+			idx = parent->index + 1;
+			BT_PUSH(t, h->pgno, idx);
+			break;
+		}
+		mpool_put(t->bt_mp, h, 0);
+	}
+
+	/* Restore the stack. */
+	while (level--) {
+		/* Push the next level down onto the stack. */
+		bi = GETBINTERNAL(h, idx);
+		pgno = bi->pgno;
+		BT_PUSH(t, pgno, 0);
+
+		/* Lose the currently pinned page. */
+		mpool_put(t->bt_mp, h, 0);
+
+		/* Get the next level down. */
+		if ((h = mpool_get(t->bt_mp, pgno, 0)) == NULL)
+			return (0);
+		idx = 0;
+	}
+	mpool_put(t->bt_mp, h, 0);
+	return (1);
+}
+
+/*
+ * __bt_sprev --
+ *	Check for an exact match before the key.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	current page
+ *	key:	key
+ *	exactp:	pointer to exact match flag
+ *
+ * Returns:
+ *	If an exact match found.
+ */
+static int
+__bt_sprev(t, h, key, exactp)
+	BTREE *t;
+	PAGE *h;
+	const DBT *key;
+	int *exactp;
+{
+	BINTERNAL *bi;
+	EPG e;
+	EPGNO *parent;
+	indx_t idx;
+	db_pgno_t pgno;
+	int level;
+
+	/*
+	 * Get the previous page.  The key is either an exact
+	 * match, or not as good as the one we already have.
+	 */
+	if ((e.page = mpool_get(t->bt_mp, h->prevpg, 0)) == NULL)
+		return (0);
+	e.index = NEXTINDEX(e.page) - 1;
+	if (__bt_cmp(t, key, &e) != 0) {
+		mpool_put(t->bt_mp, e.page, 0);
+		return (0);
+	}
+
+	mpool_put(t->bt_mp, h, 0);
+	t->bt_cur = e;
+	*exactp = 1;
+
+	/*
+	 * Adjust the stack for the movement.
+	 *
+	 * Move up the stack.
+	 */
+	for (level = 0; (parent = BT_POP(t)) != NULL; ++level) {
+		/* Get the parent page. */
+		if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+			return (1);
+
+		/* Move to the next index. */
+		if (parent->index != 0) {
+			idx = parent->index - 1;
+			BT_PUSH(t, h->pgno, idx);
+			break;
+		}
+		mpool_put(t->bt_mp, h, 0);
+	}
+
+	/* Restore the stack. */
+	while (level--) {
+		/* Push the next level down onto the stack. */
+		bi = GETBINTERNAL(h, idx);
+		pgno = bi->pgno;
+
+		/* Lose the currently pinned page. */
+		mpool_put(t->bt_mp, h, 0);
+
+		/* Get the next level down. */
+		if ((h = mpool_get(t->bt_mp, pgno, 0)) == NULL)
+			return (1);
+
+		idx = NEXTINDEX(h) - 1;
+		BT_PUSH(t, pgno, idx);
+	}
+	mpool_put(t->bt_mp, h, 0);
+	return (1);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_seq.c b/src/plugins/kdb/db2/libdb2/btree/bt_seq.c
new file mode 100644
index 0000000000..bbfb9c6c63
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_seq.c
@@ -0,0 +1,901 @@
+/*
+ * Copyright (C) 2002 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_seq.c	8.9 (Berkeley) 6/20/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static int __bt_first __P((BTREE *, const DBT *, EPG *, int *));
+static int __bt_seqadv __P((BTREE *, EPG *, int));
+static int __bt_seqset __P((BTREE *, EPG *, DBT *, int));
+
+/*
+ * Sequential scan support.
+ *
+ * The tree can be scanned sequentially, starting from either end of the
+ * tree or from any specific key.  A scan request before any scanning is
+ * done is initialized as starting from the least node.
+ */
+
+/*
+ * __bt_seq --
+ *	Btree sequential scan interface.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key for positioning and return value
+ *	data:	data return value
+ *	flags:	R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV.
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+int
+__bt_seq(dbp, key, data, flags)
+	const DB *dbp;
+	DBT *key, *data;
+	u_int flags;
+{
+	BTREE *t;
+	EPG e;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/*
+	 * If scan unitialized as yet, or starting at a specific record, set
+	 * the scan to a specific key.  Both __bt_seqset and __bt_seqadv pin
+	 * the page the cursor references if they're successful.
+	 */
+	switch (flags) {
+	case R_NEXT:
+	case R_PREV:
+		if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
+			status = __bt_seqadv(t, &e, flags);
+			break;
+		}
+		/* FALLTHROUGH */
+	case R_FIRST:
+	case R_LAST:
+	case R_CURSOR:
+		status = __bt_seqset(t, &e, key, flags);
+		break;
+	default:
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	if (status == RET_SUCCESS) {
+		__bt_setcur(t, e.page->pgno, e.index);
+
+		status =
+		    __bt_ret(t, &e, key, &t->bt_rkey, data, &t->bt_rdata, 0);
+
+		/*
+		 * If the user is doing concurrent access, we copied the
+		 * key/data, toss the page.
+		 */
+		if (F_ISSET(t, B_DB_LOCK))
+			mpool_put(t->bt_mp, e.page, 0);
+		else
+			t->bt_pinned = e.page;
+	}
+	return (status);
+}
+
+/*
+ * __bt_seqset --
+ *	Set the sequential scan to a specific key.
+ *
+ * Parameters:
+ *	t:	tree
+ *	ep:	storage for returned key
+ *	key:	key for initial scan position
+ *	flags:	R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV
+ *
+ * Side effects:
+ *	Pins the page the cursor references.
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+static int
+__bt_seqset(t, ep, key, flags)
+	BTREE *t;
+	EPG *ep;
+	DBT *key;
+	int flags;
+{
+	PAGE *h;
+	db_pgno_t pg;
+	int exact;
+
+	/*
+	 * Find the first, last or specific key in the tree and point the
+	 * cursor at it.  The cursor may not be moved until a new key has
+	 * been found.
+	 */
+	switch (flags) {
+	case R_CURSOR:				/* Keyed scan. */
+		/*
+		 * Find the first instance of the key or the smallest key
+		 * which is greater than or equal to the specified key.
+		 */
+		if (key->data == NULL || key->size == 0) {
+			errno = EINVAL;
+			return (RET_ERROR);
+		}
+		return (__bt_first(t, key, ep, &exact));
+	case R_FIRST:				/* First record. */
+	case R_NEXT:
+		/* Walk down the left-hand side of the tree. */
+		for (pg = P_ROOT;;) {
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+
+			/* Check for an empty tree. */
+			if (NEXTINDEX(h) == 0) {
+				mpool_put(t->bt_mp, h, 0);
+				return (RET_SPECIAL);
+			}
+
+			if (h->flags & (P_BLEAF | P_RLEAF))
+				break;
+			pg = GETBINTERNAL(h, 0)->pgno;
+			mpool_put(t->bt_mp, h, 0);
+		}
+		ep->page = h;
+		ep->index = 0;
+		break;
+	case R_LAST:				/* Last record. */
+	case R_PREV:
+		/* Walk down the right-hand side of the tree. */
+		for (pg = P_ROOT;;) {
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+
+			/* Check for an empty tree. */
+			if (NEXTINDEX(h) == 0) {
+				mpool_put(t->bt_mp, h, 0);
+				return (RET_SPECIAL);
+			}
+
+			if (h->flags & (P_BLEAF | P_RLEAF))
+				break;
+			pg = GETBINTERNAL(h, NEXTINDEX(h) - 1)->pgno;
+			mpool_put(t->bt_mp, h, 0);
+		}
+
+		ep->page = h;
+		ep->index = NEXTINDEX(h) - 1;
+		break;
+	}
+	return (RET_SUCCESS);
+}
+
+/*
+ * __bt_seqadvance --
+ *	Advance the sequential scan.
+ *
+ * Parameters:
+ *	t:	tree
+ *	flags:	R_NEXT, R_PREV
+ *
+ * Side effects:
+ *	Pins the page the new key/data record is on.
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+static int
+__bt_seqadv(t, ep, flags)
+	BTREE *t;
+	EPG *ep;
+	int flags;
+{
+	CURSOR *c;
+	PAGE *h;
+	indx_t idx;
+	db_pgno_t pg;
+	int exact, rval;
+
+	/*
+	 * There are a couple of states that we can be in.  The cursor has
+	 * been initialized by the time we get here, but that's all we know.
+	 */
+	c = &t->bt_cursor;
+
+	/*
+	 * The cursor was deleted and there weren't any duplicate records,
+	 * so the cursor's key was saved.  Find out where that key would
+	 * be in the current tree.  If the returned key is an exact match,
+	 * it means that a key/data pair was inserted into the tree after
+	 * the delete.  We could reasonably return the key, but the problem
+	 * is that this is the access pattern we'll see if the user is
+	 * doing seq(..., R_NEXT)/put(..., 0) pairs, i.e. the put deletes
+	 * the cursor record and then replaces it, so the cursor was saved,
+	 * and we'll simply return the same "new" record until the user
+	 * notices and doesn't do a put() of it.  Since the key is an exact
+	 * match, we could as easily put the new record before the cursor,
+	 * and we've made no guarantee to return it.  So, move forward or
+	 * back a record if it's an exact match.
+	 *
+	 * XXX
+	 * In the current implementation, put's to the cursor are done with
+	 * delete/add pairs.  This has two consequences.  First, it means
+	 * that seq(..., R_NEXT)/put(..., R_CURSOR) pairs are going to exhibit
+	 * the same behavior as above.  Second, you can return the same key
+	 * twice if you have duplicate records.  The scenario is that the
+	 * cursor record is deleted, moving the cursor forward or backward
+	 * to a duplicate.  The add then inserts the new record at a location
+	 * ahead of the cursor because duplicates aren't sorted in any way,
+	 * and the new record is later returned.  This has to be fixed at some
+	 * point.
+	 */
+	if (F_ISSET(c, CURS_ACQUIRE)) {
+		if ((rval = __bt_first(t, &c->key, ep, &exact)) == RET_ERROR)
+			return (RET_ERROR);
+		if (!exact)
+			return (rval);
+		/*
+		 * XXX
+		 * Kluge -- get, release, get the page.
+		 */
+		c->pg.pgno = ep->page->pgno;
+		c->pg.index = ep->index;
+		mpool_put(t->bt_mp, ep->page, 0);
+	}
+
+	/* Get the page referenced by the cursor. */
+	if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+		return (RET_ERROR);
+
+	/*
+ 	 * Find the next/previous record in the tree and point the cursor at
+	 * it.  The cursor may not be moved until a new key has been found.
+	 */
+	switch (flags) {
+	case R_NEXT:			/* Next record. */
+		/*
+		 * The cursor was deleted in duplicate records, and moved
+		 * forward to a record that has yet to be returned.  Clear
+		 * that flag, and return the record.
+		 */
+		if (F_ISSET(c, CURS_AFTER))
+			goto usecurrent;
+		idx = c->pg.index;
+		if (++idx == NEXTINDEX(h)) {
+			pg = h->nextpg;
+			mpool_put(t->bt_mp, h, 0);
+			if (pg == P_INVALID)
+				return (RET_SPECIAL);
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+			idx = 0;
+		}
+		break;
+	case R_PREV:			/* Previous record. */
+		/*
+		 * The cursor was deleted in duplicate records, and moved
+		 * backward to a record that has yet to be returned.  Clear
+		 * that flag, and return the record.
+		 */
+		if (F_ISSET(c, CURS_BEFORE)) {
+usecurrent:		F_CLR(c, CURS_AFTER | CURS_BEFORE);
+			ep->page = h;
+			ep->index = c->pg.index;
+			return (RET_SUCCESS);
+		}
+		idx = c->pg.index;
+		if (idx == 0) {
+			pg = h->prevpg;
+			mpool_put(t->bt_mp, h, 0);
+			if (pg == P_INVALID)
+				return (RET_SPECIAL);
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+			idx = NEXTINDEX(h) - 1;
+		} else
+			--idx;
+		break;
+	}
+
+	ep->page = h;
+	ep->index = idx;
+	return (RET_SUCCESS);
+}
+
+/*
+ * __bt_first --
+ *	Find the first entry.
+ *
+ * Parameters:
+ *	t:	the tree
+ *    key:	the key
+ *  erval:	return EPG
+ * exactp:	pointer to exact match flag
+ *
+ * Returns:
+ *	The first entry in the tree greater than or equal to key,
+ *	or RET_SPECIAL if no such key exists.
+ */
+static int
+__bt_first(t, key, erval, exactp)
+	BTREE *t;
+	const DBT *key;
+	EPG *erval;
+	int *exactp;
+{
+	PAGE *h;
+	EPG *ep, save;
+	db_pgno_t pg;
+
+	/*
+	 * Find any matching record; __bt_search pins the page.
+	 *
+	 * If it's an exact match and duplicates are possible, walk backwards
+	 * in the tree until we find the first one.  Otherwise, make sure it's
+	 * a valid key (__bt_search may return an index just past the end of a
+	 * page) and return it.
+	 */
+	if ((ep = __bt_search(t, key, exactp)) == NULL)
+		return (RET_SPECIAL);
+	if (*exactp) {
+		if (F_ISSET(t, B_NODUPS)) {
+			*erval = *ep;
+			return (RET_SUCCESS);
+		}
+			
+		/*
+		 * Walk backwards, as long as the entry matches and there are
+		 * keys left in the tree.  Save a copy of each match in case
+		 * we go too far.
+		 */
+		save = *ep;
+		h = ep->page;
+		do {
+			if (save.page->pgno != ep->page->pgno) {
+				mpool_put(t->bt_mp, save.page, 0);
+				save = *ep;
+			} else
+				save.index = ep->index;
+
+			/*
+			 * Don't unpin the page the last (or original) match
+			 * was on, but make sure it's unpinned if an error
+			 * occurs.
+			 */
+			if (ep->index == 0) {
+				if (h->prevpg == P_INVALID)
+					break;
+				if (h->pgno != save.page->pgno)
+					mpool_put(t->bt_mp, h, 0);
+				if ((h = mpool_get(t->bt_mp,
+				    h->prevpg, 0)) == NULL) {
+					if (h->pgno == save.page->pgno)
+						mpool_put(t->bt_mp,
+						    save.page, 0);
+					return (RET_ERROR);
+				}
+				ep->page = h;
+				ep->index = NEXTINDEX(h);
+			}
+			--ep->index;
+		} while (__bt_cmp(t, key, ep) == 0);
+
+		/*
+		 * Reach here with the last page that was looked at pinned,
+		 * which may or may not be the same as the last (or original)
+		 * match page.  If it's not useful, release it.
+		 */
+		if (h->pgno != save.page->pgno)
+			mpool_put(t->bt_mp, h, 0);
+
+		*erval = save;
+		return (RET_SUCCESS);
+	}
+
+	/* If at the end of a page, find the next entry. */
+	if (ep->index == NEXTINDEX(ep->page)) {
+		h = ep->page;
+		pg = h->nextpg;
+		mpool_put(t->bt_mp, h, 0);
+		if (pg == P_INVALID)
+			return (RET_SPECIAL);
+		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+			return (RET_ERROR);
+		ep->index = 0;
+		ep->page = h;
+	}
+	*erval = *ep;
+	return (RET_SUCCESS);
+}
+
+/*
+ * __bt_setcur --
+ *	Set the cursor to an entry in the tree.
+ *
+ * Parameters:
+ *	t:	the tree
+ *   pgno:	page number
+ *  index:	page index
+ */
+void
+__bt_setcur(t, pgno, idx)
+	BTREE *t;
+	db_pgno_t pgno;
+	u_int idx;
+{
+	/* Lose any already deleted key. */
+	if (t->bt_cursor.key.data != NULL) {
+		free(t->bt_cursor.key.data);
+		t->bt_cursor.key.size = 0;
+		t->bt_cursor.key.data = NULL;
+	}
+	F_CLR(&t->bt_cursor, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE);
+
+	/* Update the cursor. */
+	t->bt_cursor.pg.pgno = pgno;
+	t->bt_cursor.pg.index = idx;
+	F_SET(&t->bt_cursor, CURS_INIT);
+}
+
+/* Recursive descent cursor. */
+typedef struct rcursor_ {
+	CURSOR	cursor;
+	size_t	ssize;
+	EPGNO	*stack;
+	EPGNO	*sp;
+} RCURSOR;
+#define RCURSOR_MINSS	64
+
+static int	 bt_rcinit(void **);
+static void	 bt_rcdestroy(void **);
+static int	 bt_rcpush(RCURSOR *, db_pgno_t, u_int);
+static EPGNO	*bt_rcpop(RCURSOR *);
+static void	 bt_rcclr(RCURSOR *);
+static int	 bt_rcgrowstk(RCURSOR *);
+static int	 bt_rseqset(BTREE *, EPG *, DBT *, RCURSOR *, int);
+static int	 bt_rseqadv(BTREE *, EPG *, RCURSOR *, int);
+
+static int
+bt_rcinit(curs)
+	void **curs;
+{
+	RCURSOR *rc;
+
+	rc = *curs = malloc(sizeof(RCURSOR));
+	if (rc == NULL) {
+		errno = ENOMEM;
+		return RET_ERROR;
+	}
+	memset(rc, 0, sizeof(*rc));
+
+	rc->ssize = RCURSOR_MINSS;
+	rc->stack = malloc(rc->ssize * sizeof(EPGNO));
+	if (rc->stack == NULL) {
+		free(rc);
+		errno = ENOMEM;
+		return RET_ERROR;
+	}
+	bt_rcclr(rc);
+	return RET_SUCCESS;
+}
+
+static void
+bt_rcdestroy(curs)
+	void **curs;
+{
+	RCURSOR *rc;
+
+	rc = *curs;
+	free(rc->stack);
+	free(rc);
+	*curs = NULL;
+}
+
+static int
+bt_rcpush(rc, p, i)
+	RCURSOR *rc;
+	db_pgno_t p;
+	u_int i;
+{
+	int status;
+
+	rc->sp->pgno = p;
+	rc->sp->index = i;
+	if (++rc->sp > rc->stack + rc->ssize) {
+		status = bt_rcgrowstk(rc);
+		if (status != RET_SUCCESS)
+			return status;
+	}
+	return RET_SUCCESS;
+}
+
+static EPGNO *
+bt_rcpop(rc)
+	RCURSOR *rc;
+{
+	return (rc->sp == rc->stack) ? NULL : --rc->sp;
+}
+
+static void
+bt_rcclr(rc)
+	RCURSOR *rc;
+{
+	rc->sp = rc->stack;
+}
+
+static int
+bt_rcgrowstk(rc)
+	RCURSOR *rc;
+{
+	size_t osize;
+	EPGNO *e;
+
+	osize = rc->ssize;
+	rc->ssize *= 2;
+	e = realloc(rc->stack, rc->ssize * sizeof(EPGNO));
+	if (e == NULL) {
+		rc->ssize = osize;
+		errno = ENOMEM;
+		return RET_ERROR;
+	}
+	rc->stack = e;
+	return RET_SUCCESS;
+}
+
+/*
+ * bt_rseq --
+ *	Like __bt_seq but does recursive descent tree traversal
+ *	instead of using the prev/next pointers.
+ */
+int
+bt_rseq(dbp, key, data, curs, flags)
+	const DB *dbp;
+	DBT *key, *data;
+	void **curs;
+	u_int flags;
+{
+	RCURSOR *rc;
+	BTREE *t;
+	EPG e;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	if (curs == NULL) {
+		errno = EINVAL;
+		return RET_ERROR;
+	}
+	if (*curs == NULL) {
+		status = bt_rcinit(curs);
+		if (status != RET_SUCCESS)
+			return RET_ERROR;
+	}
+	rc = *curs;
+
+	/*
+	 * If scan unitialized as yet, or starting at a specific record, set
+	 * the scan to a specific key.  Both bt_rseqset and bt_rseqadv pin
+	 * the page the cursor references if they're successful.
+	 */
+	switch (flags) {
+	case R_NEXT:
+	case R_PREV:
+		if (F_ISSET(&rc->cursor, CURS_INIT)) {
+			status = bt_rseqadv(t, &e, rc, flags);
+			break;
+		}
+		/* FALLTHROUGH */
+	case R_FIRST:
+	case R_LAST:
+	case R_CURSOR:
+		status = bt_rseqset(t, &e, key, rc, flags);
+		break;
+	default:
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	if (status == RET_SUCCESS) {
+		status =
+		    __bt_ret(t, &e, key, &t->bt_rkey, data, &t->bt_rdata, 0);
+
+		/*
+		 * If the user is doing concurrent access, we copied the
+		 * key/data, toss the page.
+		 */
+		if (F_ISSET(t, B_DB_LOCK))
+			mpool_put(t->bt_mp, e.page, 0);
+		else
+			t->bt_pinned = e.page;
+	} else if (status == RET_SPECIAL)
+		bt_rcdestroy(curs);
+	return (status);
+}
+
+/*
+ * bt_rseqset --
+ *	Set the sequential scan to a specific key.
+ *
+ * Parameters:
+ *	t:	tree
+ *	ep:	storage for returned key
+ *	key:	key for initial scan position
+ *	rc:	recursion cursor
+ *	flags:	R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV
+ *
+ * Side effects:
+ *	Pins the page the cursor references.
+ *	Updates rc's stack and cursor.
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+static int
+bt_rseqset(t, ep, key, rc, flags)
+	BTREE *t;
+	EPG *ep;
+	DBT *key;
+	RCURSOR *rc;
+	int flags;
+{
+	PAGE *h;
+	db_pgno_t pg;
+	int status;
+
+	/*
+	 * Find the first, last or specific key in the tree and point the
+	 * cursor at it.  The cursor may not be moved until a new key has
+	 * been found.
+	 */
+	switch (flags) {
+	case R_CURSOR:		/* Not implemented. */
+		errno = EINVAL;
+		return RET_ERROR;
+	case R_FIRST:				/* First record. */
+	case R_NEXT:
+		bt_rcclr(rc);
+		/* Walk down the left-hand side of the tree. */
+		for (pg = P_ROOT;;) {
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+
+			/* Check for an empty tree. */
+			if (NEXTINDEX(h) == 0) {
+				mpool_put(t->bt_mp, h, 0);
+				return (RET_SPECIAL);
+			}
+
+			if (h->flags & (P_BLEAF | P_RLEAF))
+				break;
+			pg = GETBINTERNAL(h, 0)->pgno;
+			status = bt_rcpush(rc, h->pgno, 0);
+			mpool_put(t->bt_mp, h, 0);
+			if (status != RET_SUCCESS)
+				return status;
+		}
+		ep->page = h;
+		ep->index = 0;
+		break;
+	case R_LAST:				/* Last record. */
+	case R_PREV:
+		bt_rcclr(rc);
+		/* Walk down the right-hand side of the tree. */
+		for (pg = P_ROOT;;) {
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+
+			/* Check for an empty tree. */
+			if (NEXTINDEX(h) == 0) {
+				mpool_put(t->bt_mp, h, 0);
+				return (RET_SPECIAL);
+			}
+
+			if (h->flags & (P_BLEAF | P_RLEAF))
+				break;
+			pg = GETBINTERNAL(h, NEXTINDEX(h) - 1)->pgno;
+			status = bt_rcpush(rc, h->pgno, NEXTINDEX(h) - 1);
+			mpool_put(t->bt_mp, h, 0);
+			if (status != RET_SUCCESS)
+				return status;
+		}
+		ep->page = h;
+		ep->index = NEXTINDEX(h) - 1;
+		break;
+	}
+	rc->cursor.pg.pgno = ep->page->pgno;
+	rc->cursor.pg.index = ep->index;
+	F_CLR(&rc->cursor, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE);
+	F_SET(&rc->cursor, CURS_INIT);
+	return (RET_SUCCESS);
+}
+
+/*
+ * bt_rseqadvance --
+ *	Advance the sequential scan.
+ *
+ * Parameters:
+ *	t:	tree
+ *	ep:	return page
+ *	rc:	recursion cursor
+ *	flags:	R_NEXT, R_PREV
+ *
+ * Side effects:
+ *	Pins the page the new key/data record is on.
+ *	Updates rc's stack and cursor.
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+static int
+bt_rseqadv(t, ep, rc, flags)
+	BTREE *t;
+	EPG *ep;
+	RCURSOR *rc;
+	int flags;
+{
+	CURSOR *c;
+	PAGE *h;
+	indx_t idx;
+	db_pgno_t pg;
+	int status;
+	EPGNO *e;
+
+	/*
+	 * There are a couple of states that we can be in.  The cursor has
+	 * been initialized by the time we get here, but that's all we know.
+	 */
+	c = &rc->cursor;
+
+	/* Get the page referenced by the cursor. */
+	if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+		return (RET_ERROR);
+
+	/*
+ 	 * Find the next/previous record in the tree and point the cursor at
+	 * it.  The cursor may not be moved until a new key has been found.
+	 */
+	switch (flags) {
+	case R_NEXT:			/* Next record. */
+		idx = c->pg.index;
+		while (++idx == NEXTINDEX(h)) {
+			/* Crawl up if we hit the right edge. */
+			e = bt_rcpop(rc);
+			mpool_put(t->bt_mp, h, 0);
+			if (e == NULL) /* Hit the right edge of root. */
+				return RET_SPECIAL;
+			idx = e->index;
+			pg = e->pgno;
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+		}
+		while (!(h->flags & (P_BLEAF | P_RLEAF))) {
+			/* Crawl down the left until we hit a leaf. */
+			status = bt_rcpush(rc, h->pgno, idx);
+			pg = GETBINTERNAL(h, idx)->pgno;
+			mpool_put(t->bt_mp, h, 0);
+			if (status != RET_SUCCESS)
+				return status;
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+			idx = 0;
+		}
+		break;
+	case R_PREV:			/* Previous record. */
+		idx = c->pg.index;
+		while (!idx) {
+			/* Crawl up if we hit the left edge. */
+			e = bt_rcpop(rc);
+			mpool_put(t->bt_mp, h, 0);
+			if (e == NULL) /* Hit the left edge of root. */
+				return RET_SPECIAL;
+			idx = e->index;
+			pg = e->pgno;
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+		}
+		idx--;
+		while (!(h->flags & (P_BLEAF | P_RLEAF))) {
+			/* Crawl down the right until we hit a leaf. */
+			status = bt_rcpush(rc, h->pgno, idx);
+			pg = GETBINTERNAL(h, idx)->pgno;
+			mpool_put(t->bt_mp, h, 0);
+			if (status != RET_SUCCESS)
+				return status;
+			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+				return (RET_ERROR);
+			idx = NEXTINDEX(h) - 1;
+		}
+		break;
+	}
+
+	ep->page = h;
+	ep->index = idx;
+	c->pg.pgno = h->pgno;
+	c->pg.index = idx;
+	F_CLR(c, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE);
+	F_SET(c, CURS_INIT);
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_split.c b/src/plugins/kdb/db2/libdb2/btree/bt_split.c
new file mode 100644
index 0000000000..0cc6cf09bc
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_split.c
@@ -0,0 +1,828 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_split.c	8.10 (Berkeley) 1/9/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+static int	 bt_broot __P((BTREE *, PAGE *, PAGE *, PAGE *));
+static PAGE	*bt_page
+		    __P((BTREE *, PAGE *, PAGE **, PAGE **, indx_t *, size_t));
+static int	 bt_preserve __P((BTREE *, db_pgno_t));
+static PAGE	*bt_psplit
+		    __P((BTREE *, PAGE *, PAGE *, PAGE *, indx_t *, size_t));
+static PAGE	*bt_root
+		    __P((BTREE *, PAGE *, PAGE **, PAGE **, indx_t *, size_t));
+static int	 bt_rroot __P((BTREE *, PAGE *, PAGE *, PAGE *));
+static recno_t	 rec_total __P((PAGE *));
+
+#ifdef STATISTICS
+u_long	bt_rootsplit, bt_split, bt_sortsplit, bt_pfxsaved;
+#endif
+
+/*
+ * __BT_SPLIT -- Split the tree.
+ *
+ * Parameters:
+ *	t:	tree
+ *	sp:	page to split
+ *	key:	key to insert
+ *	data:	data to insert
+ *	flags:	BIGKEY/BIGDATA flags
+ *	ilen:	insert length
+ *	skip:	index to leave open
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__bt_split(t, sp, key, data, flags, ilen, argskip)
+	BTREE *t;
+	PAGE *sp;
+	const DBT *key, *data;
+	int flags;
+	size_t ilen;
+	u_int32_t argskip;
+{
+	BINTERNAL *bi;
+	BLEAF *bl, *tbl;
+	DBT a, b;
+	EPGNO *parent;
+	PAGE *h, *l, *r, *lchild, *rchild;
+	indx_t nxtindex;
+	u_int16_t skip;
+	u_int32_t n, nbytes, nksize;
+	int parentsplit;
+	char *dest;
+
+	/*
+	 * Split the page into two pages, l and r.  The split routines return
+	 * a pointer to the page into which the key should be inserted and with
+	 * skip set to the offset which should be used.  Additionally, l and r
+	 * are pinned.
+	 */
+	skip = argskip;
+	h = sp->pgno == P_ROOT ?
+	    bt_root(t, sp, &l, &r, &skip, ilen) :
+	    bt_page(t, sp, &l, &r, &skip, ilen);
+	if (h == NULL)
+		return (RET_ERROR);
+
+	/*
+	 * Insert the new key/data pair into the leaf page.  (Key inserts
+	 * always cause a leaf page to split first.)
+	 */
+	h->linp[skip] = h->upper -= ilen;
+	dest = (char *)h + h->upper;
+	if (F_ISSET(t, R_RECNO))
+		WR_RLEAF(dest, data, flags)
+	else
+		WR_BLEAF(dest, key, data, flags)
+
+	/* If the root page was split, make it look right. */
+	if (sp->pgno == P_ROOT &&
+	    (F_ISSET(t, R_RECNO) ?
+	    bt_rroot(t, sp, l, r) : bt_broot(t, sp, l, r)) == RET_ERROR)
+		goto err2;
+
+	/*
+	 * Now we walk the parent page stack -- a LIFO stack of the pages that
+	 * were traversed when we searched for the page that split.  Each stack
+	 * entry is a page number and a page index offset.  The offset is for
+	 * the page traversed on the search.  We've just split a page, so we
+	 * have to insert a new key into the parent page.
+	 *
+	 * If the insert into the parent page causes it to split, may have to
+	 * continue splitting all the way up the tree.  We stop if the root
+	 * splits or the page inserted into didn't have to split to hold the
+	 * new key.  Some algorithms replace the key for the old page as well
+	 * as the new page.  We don't, as there's no reason to believe that the
+	 * first key on the old page is any better than the key we have, and,
+	 * in the case of a key being placed at index 0 causing the split, the
+	 * key is unavailable.
+	 *
+	 * There are a maximum of 5 pages pinned at any time.  We keep the left
+	 * and right pages pinned while working on the parent.   The 5 are the
+	 * two children, left parent and right parent (when the parent splits)
+	 * and the root page or the overflow key page when calling bt_preserve.
+	 * This code must make sure that all pins are released other than the
+	 * root page or overflow page which is unlocked elsewhere.
+	 */
+	while ((parent = BT_POP(t)) != NULL) {
+		lchild = l;
+		rchild = r;
+
+		/* Get the parent page. */
+		if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+			goto err2;
+
+	 	/*
+		 * The new key goes ONE AFTER the index, because the split
+		 * was to the right.
+		 */
+		skip = parent->index + 1;
+
+		/*
+		 * Calculate the space needed on the parent page.
+		 *
+		 * Prefix trees: space hack when inserting into BINTERNAL
+		 * pages.  Retain only what's needed to distinguish between
+		 * the new entry and the LAST entry on the page to its left.
+		 * If the keys compare equal, retain the entire key.  Note,
+		 * we don't touch overflow keys, and the entire key must be
+		 * retained for the next-to-left most key on the leftmost
+		 * page of each level, or the search will fail.  Applicable
+		 * ONLY to internal pages that have leaf pages as children.
+		 * Further reduction of the key between pairs of internal
+		 * pages loses too much information.
+		 */
+		switch (rchild->flags & P_TYPE) {
+		case P_BINTERNAL:
+			bi = GETBINTERNAL(rchild, 0);
+			nbytes = NBINTERNAL(bi->ksize);
+			break;
+		case P_BLEAF:
+			bl = GETBLEAF(rchild, 0);
+			nbytes = NBINTERNAL(bl->ksize);
+			if (t->bt_pfx && !(bl->flags & P_BIGKEY) &&
+			    (h->prevpg != P_INVALID || skip > 1)) {
+				tbl = GETBLEAF(lchild, NEXTINDEX(lchild) - 1);
+				a.size = tbl->ksize;
+				a.data = tbl->bytes;
+				b.size = bl->ksize;
+				b.data = bl->bytes;
+				nksize = t->bt_pfx(&a, &b);
+				n = NBINTERNAL(nksize);
+				if (n < nbytes) {
+#ifdef STATISTICS
+					bt_pfxsaved += nbytes - n;
+#endif
+					nbytes = n;
+				} else
+					nksize = 0;
+			} else
+				nksize = 0;
+			break;
+		case P_RINTERNAL:
+		case P_RLEAF:
+			nbytes = NRINTERNAL;
+			break;
+		default:
+			abort();
+		}
+
+		/* Split the parent page if necessary or shift the indices. */
+		if (h->upper - h->lower < nbytes + sizeof(indx_t)) {
+			sp = h;
+			h = h->pgno == P_ROOT ?
+			    bt_root(t, h, &l, &r, &skip, nbytes) :
+			    bt_page(t, h, &l, &r, &skip, nbytes);
+			if (h == NULL)
+				goto err1;
+			parentsplit = 1;
+		} else {
+			if (skip < (nxtindex = NEXTINDEX(h)))
+				memmove(h->linp + skip + 1, h->linp + skip,
+				    (nxtindex - skip) * sizeof(indx_t));
+			h->lower += sizeof(indx_t);
+			parentsplit = 0;
+		}
+
+		/* Insert the key into the parent page. */
+		switch (rchild->flags & P_TYPE) {
+		case P_BINTERNAL:
+			h->linp[skip] = h->upper -= nbytes;
+			dest = (char *)h + h->linp[skip];
+			memmove(dest, bi, nbytes);
+			((BINTERNAL *)dest)->pgno = rchild->pgno;
+			break;
+		case P_BLEAF:
+			h->linp[skip] = h->upper -= nbytes;
+			dest = (char *)h + h->linp[skip];
+			WR_BINTERNAL(dest, nksize ? nksize : bl->ksize,
+			    rchild->pgno, bl->flags & P_BIGKEY);
+			memmove(dest, bl->bytes, nksize ? nksize : bl->ksize);
+			if (bl->flags & P_BIGKEY &&
+			    bt_preserve(t, *(db_pgno_t *)bl->bytes) == RET_ERROR)
+				goto err1;
+			break;
+		case P_RINTERNAL:
+			/*
+			 * Update the left page count.  If split
+			 * added at index 0, fix the correct page.
+			 */
+			if (skip > 0)
+				dest = (char *)h + h->linp[skip - 1];
+			else
+				dest = (char *)l + l->linp[NEXTINDEX(l) - 1];
+			((RINTERNAL *)dest)->nrecs = rec_total(lchild);
+			((RINTERNAL *)dest)->pgno = lchild->pgno;
+
+			/* Update the right page count. */
+			h->linp[skip] = h->upper -= nbytes;
+			dest = (char *)h + h->linp[skip];
+			((RINTERNAL *)dest)->nrecs = rec_total(rchild);
+			((RINTERNAL *)dest)->pgno = rchild->pgno;
+			break;
+		case P_RLEAF:
+			/*
+			 * Update the left page count.  If split
+			 * added at index 0, fix the correct page.
+			 */
+			if (skip > 0)
+				dest = (char *)h + h->linp[skip - 1];
+			else
+				dest = (char *)l + l->linp[NEXTINDEX(l) - 1];
+			((RINTERNAL *)dest)->nrecs = NEXTINDEX(lchild);
+			((RINTERNAL *)dest)->pgno = lchild->pgno;
+
+			/* Update the right page count. */
+			h->linp[skip] = h->upper -= nbytes;
+			dest = (char *)h + h->linp[skip];
+			((RINTERNAL *)dest)->nrecs = NEXTINDEX(rchild);
+			((RINTERNAL *)dest)->pgno = rchild->pgno;
+			break;
+		default:
+			abort();
+		}
+
+		/* Unpin the held pages. */
+		if (!parentsplit) {
+			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+			break;
+		}
+
+		/* If the root page was split, make it look right. */
+		if (sp->pgno == P_ROOT &&
+		    (F_ISSET(t, R_RECNO) ?
+		    bt_rroot(t, sp, l, r) : bt_broot(t, sp, l, r)) == RET_ERROR)
+			goto err1;
+
+		mpool_put(t->bt_mp, lchild, MPOOL_DIRTY);
+		mpool_put(t->bt_mp, rchild, MPOOL_DIRTY);
+	}
+
+	/* Unpin the held pages. */
+	mpool_put(t->bt_mp, l, MPOOL_DIRTY);
+	mpool_put(t->bt_mp, r, MPOOL_DIRTY);
+
+	/* Clear any pages left on the stack. */
+	return (RET_SUCCESS);
+
+	/*
+	 * If something fails in the above loop we were already walking back
+	 * up the tree and the tree is now inconsistent.  Nothing much we can
+	 * do about it but release any memory we're holding.
+	 */
+err1:	mpool_put(t->bt_mp, lchild, MPOOL_DIRTY);
+	mpool_put(t->bt_mp, rchild, MPOOL_DIRTY);
+
+err2:	mpool_put(t->bt_mp, l, 0);
+	mpool_put(t->bt_mp, r, 0);
+	__dbpanic(t->bt_dbp);
+	return (RET_ERROR);
+}
+
+/*
+ * BT_PAGE -- Split a non-root page of a btree.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	root page
+ *	lp:	pointer to left page pointer
+ *	rp:	pointer to right page pointer
+ *	skip:	pointer to index to leave open
+ *	ilen:	insert length
+ *
+ * Returns:
+ *	Pointer to page in which to insert or NULL on error.
+ */
+static PAGE *
+bt_page(t, h, lp, rp, skip, ilen)
+	BTREE *t;
+	PAGE *h, **lp, **rp;
+	indx_t *skip;
+	size_t ilen;
+{
+	PAGE *l, *r, *tp;
+	db_pgno_t npg;
+
+#ifdef STATISTICS
+	++bt_split;
+#endif
+	/* Put the new right page for the split into place. */
+	if ((r = __bt_new(t, &npg)) == NULL)
+		return (NULL);
+	r->pgno = npg;
+	r->lower = BTDATAOFF;
+	r->upper = t->bt_psize;
+	r->nextpg = h->nextpg;
+	r->prevpg = h->pgno;
+	r->flags = h->flags & P_TYPE;
+
+	/*
+	 * If we're splitting the last page on a level because we're appending
+	 * a key to it (skip is NEXTINDEX()), it's likely that the data is
+	 * sorted.  Adding an empty page on the side of the level is less work
+	 * and can push the fill factor much higher than normal.  If we're
+	 * wrong it's no big deal, we'll just do the split the right way next
+	 * time.  It may look like it's equally easy to do a similar hack for
+	 * reverse sorted data, that is, split the tree left, but it's not.
+	 * Don't even try.
+	 */
+	if (h->nextpg == P_INVALID && *skip == NEXTINDEX(h)) {
+#ifdef STATISTICS
+		++bt_sortsplit;
+#endif
+		h->nextpg = r->pgno;
+		r->lower = BTDATAOFF + sizeof(indx_t);
+		*skip = 0;
+		*lp = h;
+		*rp = r;
+		return (r);
+	}
+
+	/* Put the new left page for the split into place. */
+	if ((l = (PAGE *)malloc(t->bt_psize)) == NULL) {
+		mpool_put(t->bt_mp, r, 0);
+		return (NULL);
+	}
+#ifdef PURIFY
+	memset(l, 0xff, t->bt_psize);
+#endif
+	l->pgno = h->pgno;
+	l->nextpg = r->pgno;
+	l->prevpg = h->prevpg;
+	l->lower = BTDATAOFF;
+	l->upper = t->bt_psize;
+	l->flags = h->flags & P_TYPE;
+
+	/* Fix up the previous pointer of the page after the split page. */
+	if (h->nextpg != P_INVALID) {
+		if ((tp = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL) {
+			free(l);
+			/* XXX mpool_free(t->bt_mp, r->pgno); */
+			return (NULL);
+		}
+		tp->prevpg = r->pgno;
+		mpool_put(t->bt_mp, tp, MPOOL_DIRTY);
+	}
+
+	/*
+	 * Split right.  The key/data pairs aren't sorted in the btree page so
+	 * it's simpler to copy the data from the split page onto two new pages
+	 * instead of copying half the data to the right page and compacting
+	 * the left page in place.  Since the left page can't change, we have
+	 * to swap the original and the allocated left page after the split.
+	 */
+	tp = bt_psplit(t, h, l, r, skip, ilen);
+
+	/* Move the new left page onto the old left page. */
+	memmove(h, l, t->bt_psize);
+	if (tp == l)
+		tp = h;
+	free(l);
+
+	*lp = h;
+	*rp = r;
+	return (tp);
+}
+
+/*
+ * BT_ROOT -- Split the root page of a btree.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	root page
+ *	lp:	pointer to left page pointer
+ *	rp:	pointer to right page pointer
+ *	skip:	pointer to index to leave open
+ *	ilen:	insert length
+ *
+ * Returns:
+ *	Pointer to page in which to insert or NULL on error.
+ */
+static PAGE *
+bt_root(t, h, lp, rp, skip, ilen)
+	BTREE *t;
+	PAGE *h, **lp, **rp;
+	indx_t *skip;
+	size_t ilen;
+{
+	PAGE *l, *r, *tp;
+	db_pgno_t lnpg, rnpg;
+
+#ifdef STATISTICS
+	++bt_split;
+	++bt_rootsplit;
+#endif
+	/* Put the new left and right pages for the split into place. */
+	if ((l = __bt_new(t, &lnpg)) == NULL ||
+	    (r = __bt_new(t, &rnpg)) == NULL)
+		return (NULL);
+	l->pgno = lnpg;
+	r->pgno = rnpg;
+	l->nextpg = r->pgno;
+	r->prevpg = l->pgno;
+	l->prevpg = r->nextpg = P_INVALID;
+	l->lower = r->lower = BTDATAOFF;
+	l->upper = r->upper = t->bt_psize;
+	l->flags = r->flags = h->flags & P_TYPE;
+
+	/* Split the root page. */
+	tp = bt_psplit(t, h, l, r, skip, ilen);
+
+	*lp = l;
+	*rp = r;
+	return (tp);
+}
+
+/*
+ * BT_RROOT -- Fix up the recno root page after it has been split.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	root page
+ *	l:	left page
+ *	r:	right page
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+static int
+bt_rroot(t, h, l, r)
+	BTREE *t;
+	PAGE *h, *l, *r;
+{
+	char *dest;
+
+	/* Insert the left and right keys, set the header information. */
+	h->linp[0] = h->upper = t->bt_psize - NRINTERNAL;
+	dest = (char *)h + h->upper;
+	WR_RINTERNAL(dest,
+	    l->flags & P_RLEAF ? NEXTINDEX(l) : rec_total(l), l->pgno);
+
+	h->linp[1] = h->upper -= NRINTERNAL;
+	dest = (char *)h + h->upper;
+	WR_RINTERNAL(dest,
+	    r->flags & P_RLEAF ? NEXTINDEX(r) : rec_total(r), r->pgno);
+
+	h->lower = BTDATAOFF + 2 * sizeof(indx_t);
+
+	/* Unpin the root page, set to recno internal page. */
+	h->flags &= ~P_TYPE;
+	h->flags |= P_RINTERNAL;
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+	return (RET_SUCCESS);
+}
+
+/*
+ * BT_BROOT -- Fix up the btree root page after it has been split.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	root page
+ *	l:	left page
+ *	r:	right page
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+static int
+bt_broot(t, h, l, r)
+	BTREE *t;
+	PAGE *h, *l, *r;
+{
+	BINTERNAL *bi;
+	BLEAF *bl;
+	u_int32_t nbytes;
+	char *dest;
+
+	/*
+	 * If the root page was a leaf page, change it into an internal page.
+	 * We copy the key we split on (but not the key's data, in the case of
+	 * a leaf page) to the new root page.
+	 *
+	 * The btree comparison code guarantees that the left-most key on any
+	 * level of the tree is never used, so it doesn't need to be filled in.
+	 */
+	nbytes = NBINTERNAL(0);
+	h->linp[0] = h->upper = t->bt_psize - nbytes;
+	dest = (char *)h + h->upper;
+	WR_BINTERNAL(dest, 0, l->pgno, 0);
+
+	switch (h->flags & P_TYPE) {
+	case P_BLEAF:
+		bl = GETBLEAF(r, 0);
+		nbytes = NBINTERNAL(bl->ksize);
+		h->linp[1] = h->upper -= nbytes;
+		dest = (char *)h + h->upper;
+		WR_BINTERNAL(dest, bl->ksize, r->pgno, 0);
+		memmove(dest, bl->bytes, bl->ksize);
+
+		/*
+		 * If the key is on an overflow page, mark the overflow chain
+		 * so it isn't deleted when the leaf copy of the key is deleted.
+		 */
+		if (bl->flags & P_BIGKEY &&
+		    bt_preserve(t, *(db_pgno_t *)bl->bytes) == RET_ERROR)
+			return (RET_ERROR);
+		break;
+	case P_BINTERNAL:
+		bi = GETBINTERNAL(r, 0);
+		nbytes = NBINTERNAL(bi->ksize);
+		h->linp[1] = h->upper -= nbytes;
+		dest = (char *)h + h->upper;
+		memmove(dest, bi, nbytes);
+		((BINTERNAL *)dest)->pgno = r->pgno;
+		break;
+	default:
+		abort();
+	}
+
+	/* There are two keys on the page. */
+	h->lower = BTDATAOFF + 2 * sizeof(indx_t);
+
+	/* Unpin the root page, set to btree internal page. */
+	h->flags &= ~P_TYPE;
+	h->flags |= P_BINTERNAL;
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+	return (RET_SUCCESS);
+}
+
+/*
+ * BT_PSPLIT -- Do the real work of splitting the page.
+ *
+ * Parameters:
+ *	t:	tree
+ *	h:	page to be split
+ *	l:	page to put lower half of data
+ *	r:	page to put upper half of data
+ *	pskip:	pointer to index to leave open
+ *	ilen:	insert length
+ *
+ * Returns:
+ *	Pointer to page in which to insert.
+ */
+static PAGE *
+bt_psplit(t, h, l, r, pskip, ilen)
+	BTREE *t;
+	PAGE *h, *l, *r;
+	indx_t *pskip;
+	size_t ilen;
+{
+	BINTERNAL *bi;
+	BLEAF *bl;
+	CURSOR *c;
+	RLEAF *rl;
+	PAGE *rval;
+	void *src;
+	indx_t full, half, nxt, off, skip, top, used;
+	u_int32_t nbytes;
+	int bigkeycnt, isbigkey;
+
+	/*
+	 * Split the data to the left and right pages.  Leave the skip index
+	 * open.  Additionally, make some effort not to split on an overflow
+	 * key.  This makes internal page processing faster and can save
+	 * space as overflow keys used by internal pages are never deleted.
+	 */
+	bigkeycnt = 0;
+	skip = *pskip;
+	full = t->bt_psize - BTDATAOFF;
+	half = full / 2;
+	used = 0;
+	for (nxt = off = 0, top = NEXTINDEX(h); nxt < top; ++off) {
+		if (skip == off) {
+			nbytes = ilen;
+			isbigkey = 0;		/* XXX: not really known. */
+		} else
+			switch (h->flags & P_TYPE) {
+			case P_BINTERNAL:
+				src = bi = GETBINTERNAL(h, nxt);
+				nbytes = NBINTERNAL(bi->ksize);
+				isbigkey = bi->flags & P_BIGKEY;
+				break;
+			case P_BLEAF:
+				src = bl = GETBLEAF(h, nxt);
+				nbytes = NBLEAF(bl);
+				isbigkey = bl->flags & P_BIGKEY;
+				break;
+			case P_RINTERNAL:
+				src = GETRINTERNAL(h, nxt);
+				nbytes = NRINTERNAL;
+				isbigkey = 0;
+				break;
+			case P_RLEAF:
+				src = rl = GETRLEAF(h, nxt);
+				nbytes = NRLEAF(rl);
+				isbigkey = 0;
+				break;
+			default:
+				abort();
+			}
+
+		/*
+		 * If the key/data pairs are substantial fractions of the max
+		 * possible size for the page, it's possible to get situations
+		 * where we decide to try and copy too much onto the left page.
+		 * Make sure that doesn't happen.
+		 */
+		if ((skip <= off && used + nbytes + sizeof(indx_t) >= full)
+		    || nxt == top - 1) {
+			--off;
+			break;
+		}
+
+		/* Copy the key/data pair, if not the skipped index. */
+		if (skip != off) {
+			++nxt;
+
+			l->linp[off] = l->upper -= nbytes;
+			memmove((char *)l + l->upper, src, nbytes);
+		}
+
+		used += nbytes + sizeof(indx_t);
+		if (used >= half) {
+			if (!isbigkey || bigkeycnt == 3)
+				break;
+			else
+				++bigkeycnt;
+		}
+	}
+
+	/*
+	 * Off is the last offset that's valid for the left page.
+	 * Nxt is the first offset to be placed on the right page.
+	 */
+	l->lower += (off + 1) * sizeof(indx_t);
+
+	/*
+	 * If splitting the page that the cursor was on, the cursor has to be
+	 * adjusted to point to the same record as before the split.  If the
+	 * cursor is at or past the skipped slot, the cursor is incremented by
+	 * one.  If the cursor is on the right page, it is decremented by the
+	 * number of records split to the left page.
+	 */
+	c = &t->bt_cursor;
+	if (F_ISSET(c, CURS_INIT) && c->pg.pgno == h->pgno) {
+		if (c->pg.index >= skip)
+			++c->pg.index;
+		if (c->pg.index < nxt)			/* Left page. */
+			c->pg.pgno = l->pgno;
+		else {					/* Right page. */
+			c->pg.pgno = r->pgno;
+			c->pg.index -= nxt;
+		}
+	}
+
+	/*
+	 * If the skipped index was on the left page, just return that page.
+	 * Otherwise, adjust the skip index to reflect the new position on
+	 * the right page.
+	 */
+	if (skip <= off) {
+		skip = 0;
+		rval = l;
+	} else {
+		rval = r;
+		*pskip -= nxt;
+	}
+
+	for (off = 0; nxt < top; ++off) {
+		if (skip == nxt) {
+			++off;
+			skip = 0;
+		}
+		switch (h->flags & P_TYPE) {
+		case P_BINTERNAL:
+			src = bi = GETBINTERNAL(h, nxt);
+			nbytes = NBINTERNAL(bi->ksize);
+			break;
+		case P_BLEAF:
+			src = bl = GETBLEAF(h, nxt);
+			nbytes = NBLEAF(bl);
+			break;
+		case P_RINTERNAL:
+			src = GETRINTERNAL(h, nxt);
+			nbytes = NRINTERNAL;
+			break;
+		case P_RLEAF:
+			src = rl = GETRLEAF(h, nxt);
+			nbytes = NRLEAF(rl);
+			break;
+		default:
+			abort();
+		}
+		++nxt;
+		r->linp[off] = r->upper -= nbytes;
+		memmove((char *)r + r->upper, src, nbytes);
+	}
+	r->lower += off * sizeof(indx_t);
+
+	/* If the key is being appended to the page, adjust the index. */
+	if (skip == top)
+		r->lower += sizeof(indx_t);
+
+	return (rval);
+}
+
+/*
+ * BT_PRESERVE -- Mark a chain of pages as used by an internal node.
+ *
+ * Chains of indirect blocks pointed to by leaf nodes get reclaimed when the
+ * record that references them gets deleted.  Chains pointed to by internal
+ * pages never get deleted.  This routine marks a chain as pointed to by an
+ * internal page.
+ *
+ * Parameters:
+ *	t:	tree
+ *	pg:	page number of first page in the chain.
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+static int
+bt_preserve(t, pg)
+	BTREE *t;
+	db_pgno_t pg;
+{
+	PAGE *h;
+
+	if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+		return (RET_ERROR);
+	h->flags |= P_PRESERVE;
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+	return (RET_SUCCESS);
+}
+
+/*
+ * REC_TOTAL -- Return the number of recno entries below a page.
+ *
+ * Parameters:
+ *	h:	page
+ *
+ * Returns:
+ *	The number of recno entries below a page.
+ *
+ * XXX
+ * These values could be set by the bt_psplit routine.  The problem is that the
+ * entry has to be popped off of the stack etc. or the values have to be passed
+ * all the way back to bt_split/bt_rroot and it's not very clean.
+ */
+static recno_t
+rec_total(h)
+	PAGE *h;
+{
+	recno_t recs;
+	indx_t nxt, top;
+
+	for (recs = 0, nxt = 0, top = NEXTINDEX(h); nxt < top; ++nxt)
+		recs += GETRINTERNAL(h, nxt)->nrecs;
+	return (recs);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/bt_utils.c b/src/plugins/kdb/db2/libdb2/btree/bt_utils.c
new file mode 100644
index 0000000000..1a34598ad6
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/bt_utils.c
@@ -0,0 +1,260 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_utils.c	8.8 (Berkeley) 7/20/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "btree.h"
+
+/*
+ * __bt_ret --
+ *	Build return key/data pair.
+ *
+ * Parameters:
+ *	t:	tree
+ *	e:	key/data pair to be returned
+ *	key:	user's key structure (NULL if not to be filled in)
+ *	rkey:	memory area to hold key
+ *	data:	user's data structure (NULL if not to be filled in)
+ *	rdata:	memory area to hold data
+ *       copy:	always copy the key/data item
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__bt_ret(t, e, key, rkey, data, rdata, copy)
+	BTREE *t;
+	EPG *e;
+	DBT *key, *rkey, *data, *rdata;
+	int copy;
+{
+	BLEAF *bl;
+	void *p;
+
+	bl = GETBLEAF(e->page, e->index);
+
+	/*
+	 * We must copy big keys/data to make them contigous.  Otherwise,
+	 * leave the page pinned and don't copy unless the user specified
+	 * concurrent access.
+	 */
+	if (key == NULL)
+		goto dataonly;
+
+	if (bl->flags & P_BIGKEY) {
+		if (__ovfl_get(t, bl->bytes,
+		    &key->size, &rkey->data, &rkey->size))
+			return (RET_ERROR);
+		key->data = rkey->data;
+	} else if (copy || F_ISSET(t, B_DB_LOCK)) {
+		if (bl->ksize > rkey->size) {
+			p = (void *)(rkey->data == NULL ?
+			    malloc(bl->ksize) : realloc(rkey->data, bl->ksize));
+			if (p == NULL)
+				return (RET_ERROR);
+			rkey->data = p;
+			rkey->size = bl->ksize;
+		}
+		memmove(rkey->data, bl->bytes, bl->ksize);
+		key->size = bl->ksize;
+		key->data = rkey->data;
+	} else {
+		key->size = bl->ksize;
+		key->data = bl->bytes;
+	}
+
+dataonly:
+	if (data == NULL)
+		return (RET_SUCCESS);
+
+	if (bl->flags & P_BIGDATA) {
+		if (__ovfl_get(t, bl->bytes + bl->ksize,
+		    &data->size, &rdata->data, &rdata->size))
+			return (RET_ERROR);
+		data->data = rdata->data;
+	} else if (copy || F_ISSET(t, B_DB_LOCK)) {
+		/* Use +1 in case the first record retrieved is 0 length. */
+		if (bl->dsize + 1 > rdata->size) {
+			p = (void *)(rdata->data == NULL ?
+			    malloc(bl->dsize + 1) :
+			    realloc(rdata->data, bl->dsize + 1));
+			if (p == NULL)
+				return (RET_ERROR);
+			rdata->data = p;
+			rdata->size = bl->dsize + 1;
+		}
+		memmove(rdata->data, bl->bytes + bl->ksize, bl->dsize);
+		data->size = bl->dsize;
+		data->data = rdata->data;
+	} else {
+		data->size = bl->dsize;
+		data->data = bl->bytes + bl->ksize;
+	}
+
+	return (RET_SUCCESS);
+}
+
+/*
+ * __BT_CMP -- Compare a key to a given record.
+ *
+ * Parameters:
+ *	t:	tree
+ *	k1:	DBT pointer of first arg to comparison
+ *	e:	pointer to EPG for comparison
+ *
+ * Returns:
+ *	< 0 if k1 is < record
+ *	= 0 if k1 is = record
+ *	> 0 if k1 is > record
+ */
+int
+__bt_cmp(t, k1, e)
+	BTREE *t;
+	const DBT *k1;
+	EPG *e;
+{
+	BINTERNAL *bi;
+	BLEAF *bl;
+	DBT k2;
+	PAGE *h;
+	void *bigkey;
+
+	/*
+	 * The left-most key on internal pages, at any level of the tree, is
+	 * guaranteed by the following code to be less than any user key.
+	 * This saves us from having to update the leftmost key on an internal
+	 * page when the user inserts a new key in the tree smaller than
+	 * anything we've yet seen.
+	 */
+	h = e->page;
+	if (e->index == 0 && h->prevpg == P_INVALID && !(h->flags & P_BLEAF))
+		return (1);
+
+	bigkey = NULL;
+	if (h->flags & P_BLEAF) {
+		bl = GETBLEAF(h, e->index);
+		if (bl->flags & P_BIGKEY)
+			bigkey = bl->bytes;
+		else {
+			k2.data = bl->bytes;
+			k2.size = bl->ksize;
+		}
+	} else {
+		bi = GETBINTERNAL(h, e->index);
+		if (bi->flags & P_BIGKEY)
+			bigkey = bi->bytes;
+		else {
+			k2.data = bi->bytes;
+			k2.size = bi->ksize;
+		}
+	}
+
+	if (bigkey) {
+		if (__ovfl_get(t, bigkey,
+		    &k2.size, &t->bt_rdata.data, &t->bt_rdata.size))
+			return (RET_ERROR);
+		k2.data = t->bt_rdata.data;
+	}
+	return ((*t->bt_cmp)(k1, &k2));
+}
+
+/*
+ * __BT_DEFCMP -- Default comparison routine.
+ *
+ * Parameters:
+ *	a:	DBT #1
+ *	b: 	DBT #2
+ *
+ * Returns:
+ *	< 0 if a is < b
+ *	= 0 if a is = b
+ *	> 0 if a is > b
+ */
+int
+__bt_defcmp(a, b)
+	const DBT *a, *b;
+{
+	register size_t len;
+	register u_char *p1, *p2;
+
+	/*
+	 * XXX
+	 * If a size_t doesn't fit in an int, this routine can lose.
+	 * What we need is a integral type which is guaranteed to be
+	 * larger than a size_t, and there is no such thing.
+	 */
+	len = MIN(a->size, b->size);
+	for (p1 = a->data, p2 = b->data; len--; ++p1, ++p2)
+		if (*p1 != *p2)
+			return ((int)*p1 - (int)*p2);
+	return ((int)a->size - (int)b->size);
+}
+
+/*
+ * __BT_DEFPFX -- Default prefix routine.
+ *
+ * Parameters:
+ *	a:	DBT #1
+ *	b: 	DBT #2
+ *
+ * Returns:
+ *	Number of bytes needed to distinguish b from a.
+ */
+size_t
+__bt_defpfx(a, b)
+	const DBT *a, *b;
+{
+	register u_char *p1, *p2;
+	register size_t cnt, len;
+
+	cnt = 1;
+	len = MIN(a->size, b->size);
+	for (p1 = a->data, p2 = b->data; len--; ++p1, ++p2, ++cnt)
+		if (*p1 != *p2)
+			return (cnt);
+
+	/* a->size must be <= b->size, or they wouldn't be in this order. */
+	return (a->size < b->size ? a->size + 1 : a->size);
+}
diff --git a/src/plugins/kdb/db2/libdb2/btree/btree.h b/src/plugins/kdb/db2/libdb2/btree/btree.h
new file mode 100644
index 0000000000..171712749f
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/btree.h
@@ -0,0 +1,383 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)btree.h	8.11 (Berkeley) 8/17/94
+ */
+
+/* Macros to set/clear/test flags. */
+#define	F_SET(p, f)	(p)->flags |= (f)
+#define	F_CLR(p, f)	(p)->flags &= ~(f)
+#define	F_ISSET(p, f)	((p)->flags & (f))
+
+#include "mpool.h"
+
+#define	DEFMINKEYPAGE	(2)		/* Minimum keys per page */
+#define	MINCACHE	(5)		/* Minimum cached pages */
+#define	MINPSIZE	(512)		/* Minimum page size */
+
+/*
+ * Page 0 of a btree file contains a copy of the meta-data.  This page is also
+ * used as an out-of-band page, i.e. page pointers that point to nowhere point
+ * to page 0.  Page 1 is the root of the btree.
+ */
+#define	P_INVALID	 0		/* Invalid tree page number. */
+#define	P_META		 0		/* Tree metadata page number. */
+#define	P_ROOT		 1		/* Tree root page number. */
+
+/*
+ * There are five page layouts in the btree: btree internal pages (BINTERNAL),
+ * btree leaf pages (BLEAF), recno internal pages (RINTERNAL), recno leaf pages
+ * (RLEAF) and overflow pages.  All five page types have a page header (PAGE).
+ * This implementation requires that values within structures NOT be padded.
+ * (ANSI C permits random padding.)  If your compiler pads randomly you'll have
+ * to do some work to get this package to run.
+ */
+typedef struct _page {
+	db_pgno_t	pgno;			/* this page's page number */
+	db_pgno_t	prevpg;			/* left sibling */
+	db_pgno_t	nextpg;			/* right sibling */
+
+#define	P_BINTERNAL	0x01		/* btree internal page */
+#define	P_BLEAF		0x02		/* leaf page */
+#define	P_OVERFLOW	0x04		/* overflow page */
+#define	P_RINTERNAL	0x08		/* recno internal page */
+#define	P_RLEAF		0x10		/* leaf page */
+#define P_TYPE		0x1f		/* type mask */
+#define	P_PRESERVE	0x20		/* never delete this chain of pages */
+	u_int32_t flags;
+
+	indx_t	lower;			/* lower bound of free space on page */
+	indx_t	upper;			/* upper bound of free space on page */
+	indx_t	linp[1];		/* indx_t-aligned VAR. LENGTH DATA */
+} PAGE;
+
+/* First and next index. */
+#define	BTDATAOFF							\
+	(sizeof(db_pgno_t) + sizeof(db_pgno_t) + sizeof(db_pgno_t) +		\
+	    sizeof(u_int32_t) + sizeof(indx_t) + sizeof(indx_t))
+#define	NEXTINDEX(p)	(((p)->lower - BTDATAOFF) / sizeof(indx_t))
+
+/*
+ * For pages other than overflow pages, there is an array of offsets into the
+ * rest of the page immediately following the page header.  Each offset is to
+ * an item which is unique to the type of page.  The h_lower offset is just
+ * past the last filled-in index.  The h_upper offset is the first item on the
+ * page.  Offsets are from the beginning of the page.
+ *
+ * If an item is too big to store on a single page, a flag is set and the item
+ * is a { page, size } pair such that the page is the first page of an overflow
+ * chain with size bytes of item.  Overflow pages are simply bytes without any
+ * external structure.
+ *
+ * The page number and size fields in the items are db_pgno_t-aligned so they can
+ * be manipulated without copying.  (This presumes that 32 bit items can be
+ * manipulated on this system.)
+ */
+#define	LALIGN(n)	(((n) + sizeof(db_pgno_t) - 1) & ~(sizeof(db_pgno_t) - 1))
+#define	NOVFLSIZE	(sizeof(db_pgno_t) + sizeof(u_int32_t))
+
+/*
+ * For the btree internal pages, the item is a key.  BINTERNALs are {key, pgno}
+ * pairs, such that the key compares less than or equal to all of the records
+ * on that page.  For a tree without duplicate keys, an internal page with two
+ * consecutive keys, a and b, will have all records greater than or equal to a
+ * and less than b stored on the page associated with a.  Duplicate keys are
+ * somewhat special and can cause duplicate internal and leaf page records and
+ * some minor modifications of the above rule.
+ */
+typedef struct _binternal {
+	u_int32_t ksize;		/* key size */
+	db_pgno_t	pgno;			/* page number stored on */
+#define	P_BIGDATA	0x01		/* overflow data */
+#define	P_BIGKEY	0x02		/* overflow key */
+	u_char	flags;
+	char	bytes[1];		/* data */
+} BINTERNAL;
+
+/* Get the page's BINTERNAL structure at index indx. */
+#define	GETBINTERNAL(pg, indx)						\
+	((BINTERNAL *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NBINTERNAL(len)							\
+	LALIGN(sizeof(u_int32_t) + sizeof(db_pgno_t) + sizeof(u_char) + (len))
+
+/* Copy a BINTERNAL entry to the page. */
+#define	WR_BINTERNAL(p, size, pgno, flags) {				\
+	*(u_int32_t *)p = size;						\
+	p += sizeof(u_int32_t);						\
+	*(db_pgno_t *)p = pgno;						\
+	p += sizeof(db_pgno_t);						\
+	*(u_char *)p = flags;						\
+	p += sizeof(u_char);						\
+}
+
+/*
+ * For the recno internal pages, the item is a page number with the number of
+ * keys found on that page and below.
+ */
+typedef struct _rinternal {
+	recno_t	nrecs;			/* number of records */
+	db_pgno_t	pgno;			/* page number stored below */
+} RINTERNAL;
+
+/* Get the page's RINTERNAL structure at index indx. */
+#define	GETRINTERNAL(pg, indx)						\
+	((RINTERNAL *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NRINTERNAL							\
+	LALIGN(sizeof(recno_t) + sizeof(db_pgno_t))
+
+/* Copy a RINTERAL entry to the page. */
+#define	WR_RINTERNAL(p, nrecs, pgno) {					\
+	*(recno_t *)p = nrecs;						\
+	p += sizeof(recno_t);						\
+	*(db_pgno_t *)p = pgno;						\
+}
+
+/* For the btree leaf pages, the item is a key and data pair. */
+typedef struct _bleaf {
+	u_int32_t	ksize;		/* size of key */
+	u_int32_t	dsize;		/* size of data */
+	u_char	flags;			/* P_BIGDATA, P_BIGKEY */
+	char	bytes[1];		/* data */
+} BLEAF;
+
+/* Get the page's BLEAF structure at index indx. */
+#define	GETBLEAF(pg, indx)						\
+	((BLEAF *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NBLEAF(p)	NBLEAFDBT((p)->ksize, (p)->dsize)
+
+/* Get the number of bytes in the user's key/data pair. */
+#define NBLEAFDBT(ksize, dsize)						\
+	LALIGN(sizeof(u_int32_t) + sizeof(u_int32_t) + sizeof(u_char) +	\
+	    (ksize) + (dsize))
+
+/* Copy a BLEAF entry to the page. */
+#define	WR_BLEAF(p, key, data, flags) {					\
+	*(u_int32_t *)p = key->size;					\
+	p += sizeof(u_int32_t);						\
+	*(u_int32_t *)p = data->size;					\
+	p += sizeof(u_int32_t);						\
+	*(u_char *)p = flags;						\
+	p += sizeof(u_char);						\
+	memmove(p, key->data, key->size);				\
+	p += key->size;							\
+	memmove(p, data->data, data->size);				\
+}
+
+/* For the recno leaf pages, the item is a data entry. */
+typedef struct _rleaf {
+	u_int32_t	dsize;		/* size of data */
+	u_char	flags;			/* P_BIGDATA */
+	char	bytes[1];
+} RLEAF;
+
+/* Get the page's RLEAF structure at index indx. */
+#define	GETRLEAF(pg, indx)						\
+	((RLEAF *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NRLEAF(p)	NRLEAFDBT((p)->dsize)
+
+/* Get the number of bytes from the user's data. */
+#define	NRLEAFDBT(dsize)						\
+	LALIGN(sizeof(u_int32_t) + sizeof(u_char) + (dsize))
+
+/* Copy a RLEAF entry to the page. */
+#define	WR_RLEAF(p, data, flags) {					\
+	*(u_int32_t *)p = data->size;					\
+	p += sizeof(u_int32_t);						\
+	*(u_char *)p = flags;						\
+	p += sizeof(u_char);						\
+	memmove(p, data->data, data->size);				\
+}
+
+/*
+ * A record in the tree is either a pointer to a page and an index in the page
+ * or a page number and an index.  These structures are used as a cursor, stack
+ * entry and search returns as well as to pass records to other routines.
+ *
+ * One comment about searches.  Internal page searches must find the largest
+ * record less than key in the tree so that descents work.  Leaf page searches
+ * must find the smallest record greater than key so that the returned index
+ * is the record's correct position for insertion.
+ */
+typedef struct _epgno {
+	db_pgno_t	pgno;			/* the page number */
+	indx_t	index;			/* the index on the page */
+} EPGNO;
+
+typedef struct _epg {
+	PAGE	*page;			/* the (pinned) page */
+	indx_t	 index;			/* the index on the page */
+} EPG;
+
+/*
+ * About cursors.  The cursor (and the page that contained the key/data pair
+ * that it referenced) can be deleted, which makes things a bit tricky.  If
+ * there are no duplicates of the cursor key in the tree (i.e. B_NODUPS is set
+ * or there simply aren't any duplicates of the key) we copy the key that it
+ * referenced when it's deleted, and reacquire a new cursor key if the cursor
+ * is used again.  If there are duplicates keys, we move to the next/previous
+ * key, and set a flag so that we know what happened.  NOTE: if duplicate (to
+ * the cursor) keys are added to the tree during this process, it is undefined
+ * if they will be returned or not in a cursor scan.
+ *
+ * The flags determine the possible states of the cursor:
+ *
+ * CURS_INIT	The cursor references *something*.
+ * CURS_ACQUIRE	The cursor was deleted, and a key has been saved so that
+ *		we can reacquire the right position in the tree.
+ * CURS_AFTER, CURS_BEFORE
+ *		The cursor was deleted, and now references a key/data pair
+ *		that has not yet been returned, either before or after the
+ *		deleted key/data pair.
+ * XXX
+ * This structure is broken out so that we can eventually offer multiple
+ * cursors as part of the DB interface.
+ */
+typedef struct _cursor {
+	EPGNO	 pg;			/* B: Saved tree reference. */
+	DBT	 key;			/* B: Saved key, or key.data == NULL. */
+	recno_t	 rcursor;		/* R: recno cursor (1-based) */
+
+#define	CURS_ACQUIRE	0x01		/*  B: Cursor needs to be reacquired. */
+#define	CURS_AFTER	0x02		/*  B: Unreturned cursor after key. */
+#define	CURS_BEFORE	0x04		/*  B: Unreturned cursor before key. */
+#define	CURS_INIT	0x08		/* RB: Cursor initialized. */
+	u_int8_t flags;
+} CURSOR;
+
+/*
+ * The metadata of the tree.  The nrecs field is used only by the RECNO code.
+ * This is because the btree doesn't really need it and it requires that every
+ * put or delete call modify the metadata.
+ */
+typedef struct _btmeta {
+	u_int32_t	magic;		/* magic number */
+	u_int32_t	version;	/* version */
+	u_int32_t	psize;		/* page size */
+	u_int32_t	free;		/* page number of first free page */
+	u_int32_t	nrecs;		/* R: number of records */
+
+#define	SAVEMETA	(B_NODUPS | R_RECNO)
+	u_int32_t	flags;		/* bt_flags & SAVEMETA */
+} BTMETA;
+
+/* The in-memory btree/recno data structure. */
+typedef struct _btree {
+	MPOOL	 *bt_mp;		/* memory pool cookie */
+
+	DB	 *bt_dbp;		/* pointer to enclosing DB */
+
+	EPG	  bt_cur;		/* current (pinned) page */
+	PAGE	 *bt_pinned;		/* page pinned across calls */
+
+	CURSOR	  bt_cursor;		/* cursor */
+
+#define	BT_PUSH(t, p, i) {						\
+	t->bt_sp->pgno = p; 						\
+	t->bt_sp->index = i; 						\
+	++t->bt_sp;							\
+}
+#define	BT_POP(t)	(t->bt_sp == t->bt_stack ? NULL : --t->bt_sp)
+#define	BT_CLR(t)	(t->bt_sp = t->bt_stack)
+	EPGNO	  bt_stack[50];		/* stack of parent pages */
+	EPGNO	 *bt_sp;		/* current stack pointer */
+
+	DBT	  bt_rkey;		/* returned key */
+	DBT	  bt_rdata;		/* returned data */
+
+	int	  bt_fd;		/* tree file descriptor */
+
+	db_pgno_t	  bt_free;		/* next free page */
+	u_int32_t bt_psize;		/* page size */
+	indx_t	  bt_ovflsize;		/* cut-off for key/data overflow */
+	int	  bt_lorder;		/* byte order */
+					/* sorted order */
+	enum { NOT, BACK, FORWARD } bt_order;
+	EPGNO	  bt_last;		/* last insert */
+
+					/* B: key comparison function */
+	int	(*bt_cmp) __P((const DBT *, const DBT *));
+					/* B: prefix comparison function */
+	size_t	(*bt_pfx) __P((const DBT *, const DBT *));
+					/* R: recno input function */
+	int	(*bt_irec) __P((struct _btree *, recno_t));
+
+	FILE	 *bt_rfp;		/* R: record FILE pointer */
+	int	  bt_rfd;		/* R: record file descriptor */
+
+	caddr_t	  bt_cmap;		/* R: current point in mapped space */
+	caddr_t	  bt_smap;		/* R: start of mapped space */
+	caddr_t   bt_emap;		/* R: end of mapped space */
+	size_t	  bt_msize;		/* R: size of mapped region. */
+
+	recno_t	  bt_nrecs;		/* R: number of records */
+	size_t	  bt_reclen;		/* R: fixed record length */
+	u_char	  bt_bval;		/* R: delimiting byte/pad character */
+
+/*
+ * NB:
+ * B_NODUPS and R_RECNO are stored on disk, and may not be changed.
+ */
+#define	B_INMEM		0x00001		/* in-memory tree */
+#define	B_METADIRTY	0x00002		/* need to write metadata */
+#define	B_MODIFIED	0x00004		/* tree modified */
+#define	B_NEEDSWAP	0x00008		/* if byte order requires swapping */
+#define	B_RDONLY	0x00010		/* read-only tree */
+
+#define	B_NODUPS	0x00020		/* no duplicate keys permitted */
+#define	R_RECNO		0x00080		/* record oriented tree */
+
+#define	R_CLOSEFP	0x00040		/* opened a file pointer */
+#define	R_EOF		0x00100		/* end of input file reached. */
+#define	R_FIXLEN	0x00200		/* fixed length records */
+#define	R_MEMMAPPED	0x00400		/* memory mapped file. */
+#define	R_INMEM		0x00800		/* in-memory file */
+#define	R_MODIFIED	0x01000		/* modified file */
+#define	R_RDONLY	0x02000		/* read-only file */
+
+#define	B_DB_LOCK	0x04000		/* DB_LOCK specified. */
+#define	B_DB_SHMEM	0x08000		/* DB_SHMEM specified. */
+#define	B_DB_TXN	0x10000		/* DB_TXN specified. */
+	u_int32_t flags;
+} BTREE;
+
+#include "extern.h"
diff --git a/src/plugins/kdb/db2/libdb2/btree/extern.h b/src/plugins/kdb/db2/libdb2/btree/extern.h
new file mode 100644
index 0000000000..3aa88417e3
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/btree/extern.h
@@ -0,0 +1,110 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)extern.h	8.11 (Berkeley) 1/9/95
+ */
+
+#define __bt_close	__kdb2_bt_close
+#define __bt_cmp	__kdb2_bt_cmp
+#define __bt_crsrdel	__kdb2_bt_crsrdel
+#define __bt_defcmp	__kdb2_bt_defcmp
+#define __bt_defpfx	__kdb2_bt_defpfx
+#define __bt_delete	__kdb2_bt_delete
+#define __bt_dleaf	__kdb2_bt_deleaf
+#define __bt_fd		__kdb2_bt_fd
+#define __bt_free	__kdb2_bt_free
+#define __bt_get	__kdb2_bt_get
+#define __bt_new	__kdb2_bt_new
+#define __bt_pgin	__kdb2_bt_pgin
+#define __bt_pgout	__kdb2_bt_pgout
+#define __bt_push	__kdb2_bt_push
+#define __bt_put	__kdb2_bt_put
+#define __bt_ret	__kdb2_bt_ret
+#define __bt_search	__kdb2_bt_search
+#define __bt_seq	__kdb2_bt_seq
+#define __bt_setcur	__kdb2_bt_setcur
+#define __bt_split	__kdb2_bt_split
+#define __bt_sync	__kdb2_bt_sync
+#define __ovfl_delete	__kdb2_ovfl_delete
+#define __ovfl_get	__kdb2_ovfl_get
+#define __ovfl_put	__kdb2_ovfl_put
+#define __bt_dnpage	__kdb2_bt_dnpage
+#define __bt_dmpage	__kdb2_bt_dmpage
+#define __bt_dpage	__kdb2_bt_dpage
+#define __bt_dump	__kdb2_bt_dump
+#define __bt_stat	__kdb2_bt_stat
+
+#define bt_rcinit	kdb2_bt_rcinit
+#define bt_rcdestroy	kdb2_bt_rcdestroy
+#define bt_rcpush	kdb2_bt_rcpush
+#define bt_rcpop	kdb2_bt_rcpop
+#define bt_rcclr	kdb2_bt_rcclr
+#define bt_rcgrowstk	kdb2_bt_rcgrowstk
+#define bt_rseqset	kdb2_bt_rseqset
+#define bt_rseqadv	kdb2_bt_rseqadv
+
+int	 __bt_close __P((DB *));
+int	 __bt_cmp __P((BTREE *, const DBT *, EPG *));
+int	 __bt_crsrdel __P((BTREE *, EPGNO *));
+int	 __bt_defcmp __P((const DBT *, const DBT *));
+size_t	 __bt_defpfx __P((const DBT *, const DBT *));
+int	 __bt_delete __P((const DB *, const DBT *, u_int));
+int	 __bt_dleaf __P((BTREE *, const DBT *, PAGE *, u_int));
+int	 __bt_fd __P((const DB *));
+int	 __bt_free __P((BTREE *, PAGE *));
+int	 __bt_get __P((const DB *, const DBT *, DBT *, u_int));
+PAGE	*__bt_new __P((BTREE *, db_pgno_t *));
+void	 __bt_pgin __P((void *, db_pgno_t, void *));
+void	 __bt_pgout __P((void *, db_pgno_t, void *));
+int	 __bt_push __P((BTREE *, db_pgno_t, int));
+int	 __bt_put __P((const DB *dbp, DBT *, const DBT *, u_int));
+int	 __bt_ret __P((BTREE *, EPG *, DBT *, DBT *, DBT *, DBT *, int));
+EPG	*__bt_search __P((BTREE *, const DBT *, int *));
+int	 __bt_seq __P((const DB *, DBT *, DBT *, u_int));
+void	 __bt_setcur __P((BTREE *, db_pgno_t, u_int));
+int	 __bt_split __P((BTREE *, PAGE *,
+	    const DBT *, const DBT *, int, size_t, u_int32_t));
+int	 __bt_sync __P((const DB *, u_int));
+
+int	 __ovfl_delete __P((BTREE *, void *));
+int	 __ovfl_get __P((BTREE *, void *, size_t *, void **, size_t *));
+int	 __ovfl_put __P((BTREE *, const DBT *, db_pgno_t *));
+
+#ifdef DEBUG
+int	 __bt_dnpage __P((DB *, db_pgno_t));
+int	 __bt_dpage __P((DB *, PAGE *));
+int	 __bt_dmpage __P((PAGE *));
+int	 __bt_dump __P((DB *));
+#endif
+#ifdef STATISTICS
+int	 __bt_stat __P((DB *));
+#endif
diff --git a/src/plugins/kdb/db2/libdb2/clib/Makefile.in b/src/plugins/kdb/db2/libdb2/clib/Makefile.in
new file mode 100644
index 0000000000..09f8089672
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/clib/Makefile.in
@@ -0,0 +1,11 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/clib
+mydir=clib
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+STLIBOBJS=@MEMMOVE_OBJ@ @MKSTEMP_OBJ@ @STRERROR_OBJ@
+
+LOCALINCLUDES=-I../include
+
+all-unix:: all-libobjs
+clean-unix:: clean-libobjs
+# @libobj_frag@
diff --git a/src/plugins/kdb/db2/libdb2/clib/memmove.c b/src/plugins/kdb/db2/libdb2/clib/memmove.c
new file mode 100644
index 0000000000..f9bf650a38
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/clib/memmove.c
@@ -0,0 +1,142 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bcopy.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+/*
+ * sizeof(word) MUST BE A POWER OF TWO
+ * SO THAT wmask BELOW IS ALL ONES
+ */
+typedef	int word;		/* "word" used for optimal copy speed */
+
+#define	wsize	sizeof(word)
+#define	wmask	(wsize - 1)
+
+/*
+ * Copy a block of memory, handling overlap.
+ * This is the routine that actually implements
+ * (the portable versions of) bcopy, memcpy, and memmove.
+ */
+#ifdef MEMCOPY
+void *
+memcpy(dst0, src0, length)
+#else
+#ifdef MEMMOVE
+void *
+memmove(dst0, src0, length)
+#else
+void
+bcopy(src0, dst0, length)
+#endif
+#endif
+	void *dst0;
+	const void *src0;
+	register size_t length;
+{
+	register char *dst = dst0;
+	register const char *src = src0;
+	register size_t t;
+
+	if (length == 0 || dst == src)		/* nothing to do */
+		goto done;
+
+	/*
+	 * Macros: loop-t-times; and loop-t-times, t>0
+	 */
+#define	TLOOP(s) if (t) TLOOP1(s)
+#define	TLOOP1(s) do { s; } while (--t)
+
+	if ((unsigned long)dst < (unsigned long)src) {
+		/*
+		 * Copy forward.
+		 */
+		t = (int)src;	/* only need low bits */
+		if ((t | (int)dst) & wmask) {
+			/*
+			 * Try to align operands.  This cannot be done
+			 * unless the low bits match.
+			 */
+			if ((t ^ (int)dst) & wmask || length < wsize)
+				t = length;
+			else
+				t = wsize - (t & wmask);
+			length -= t;
+			TLOOP1(*dst++ = *src++);
+		}
+		/*
+		 * Copy whole words, then mop up any trailing bytes.
+		 */
+		t = length / wsize;
+		TLOOP(*(word *)dst = *(word *)src; src += wsize; dst += wsize);
+		t = length & wmask;
+		TLOOP(*dst++ = *src++);
+	} else {
+		/*
+		 * Copy backwards.  Otherwise essentially the same.
+		 * Alignment works as before, except that it takes
+		 * (t&wmask) bytes to align, not wsize-(t&wmask).
+		 */
+		src += length;
+		dst += length;
+		t = (int)src;
+		if ((t | (int)dst) & wmask) {
+			if ((t ^ (int)dst) & wmask || length <= wsize)
+				t = length;
+			else
+				t &= wmask;
+			length -= t;
+			TLOOP1(*--dst = *--src);
+		}
+		t = length / wsize;
+		TLOOP(src -= wsize; dst -= wsize; *(word *)dst = *(word *)src);
+		t = length & wmask;
+		TLOOP(*--dst = *--src);
+	}
+done:
+#if defined(MEMCOPY) || defined(MEMMOVE)
+	return (dst0);
+#else
+	return;
+#endif
+}
diff --git a/src/plugins/kdb/db2/libdb2/clib/mkstemp.c b/src/plugins/kdb/db2/libdb2/clib/mkstemp.c
new file mode 100644
index 0000000000..71dc7d17a1
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/clib/mkstemp.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 1987, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)mktemp.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+static int _gettemp();
+
+mkstemp(path)
+	char *path;
+{
+	int fd;
+
+	return (_gettemp(path, &fd) ? fd : -1);
+}
+
+static
+_gettemp(path, doopen)
+	char *path;
+	register int *doopen;
+{
+	register char *start, *trv;
+	struct stat sbuf;
+	u_int pid;
+
+	pid = getpid();
+	for (trv = path; *trv; ++trv);		/* extra X's get set to 0's */
+	while (*--trv == 'X') {
+		*trv = (pid % 10) + '0';
+		pid /= 10;
+	}
+
+	/*
+	 * check the target directory; if you have six X's and it
+	 * doesn't exist this runs for a *very* long time.
+	 */
+	for (start = trv + 1;; --trv) {
+		if (trv <= path)
+			break;
+		if (*trv == '/') {
+			*trv = '\0';
+			if (stat(path, &sbuf))
+				return(0);
+			if (!S_ISDIR(sbuf.st_mode)) {
+				errno = ENOTDIR;
+				return(0);
+			}
+			*trv = '/';
+			break;
+		}
+	}
+
+	for (;;) {
+		if (doopen) {
+			if ((*doopen =
+			    open(path, O_CREAT|O_EXCL|O_RDWR|O_BINARY, 0600)) >= 0)
+				return(1);
+			if (errno != EEXIST)
+				return(0);
+		}
+		else if (stat(path, &sbuf))
+			return(errno == ENOENT ? 1 : 0);
+
+		/* tricky little algorithm for backward compatibility */
+		for (trv = start;;) {
+			if (!*trv)
+				return(0);
+			if (*trv == 'z')
+				*trv++ = 'a';
+			else {
+				if (isdigit(*trv))
+					*trv = 'a';
+				else
+					++*trv;
+				break;
+			}
+		}
+	}
+	/*NOTREACHED*/
+}
diff --git a/src/plugins/kdb/db2/libdb2/clib/strerror.c b/src/plugins/kdb/db2/libdb2/clib/strerror.c
new file mode 100644
index 0000000000..0a509f79f2
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/clib/strerror.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strerror.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+char *
+strerror(num)
+	int num;
+{
+	extern int sys_nerr;
+	extern char *sys_errlist[];
+#define	UPREFIX	"Unknown error: "
+	static char ebuf[40] = UPREFIX;		/* 64-bit number + slop */
+	register unsigned int errnum;
+	register char *p, *t;
+	char tmp[40];
+
+	errnum = num;				/* convert to unsigned */
+	if (errnum < sys_nerr)
+		return(sys_errlist[errnum]);
+
+	/* Do this by hand, so we don't include stdio(3). */
+	t = tmp;
+	do {
+		*t++ = "0123456789"[errnum % 10];
+	} while (errnum /= 10);
+	for (p = ebuf + sizeof(UPREFIX) - 1;;) {
+		*p++ = *--t;
+		if (t <= tmp)
+			break;
+	}
+	return(ebuf);
+}
diff --git a/src/plugins/kdb/db2/libdb2/configure.in b/src/plugins/kdb/db2/libdb2/configure.in
new file mode 100644
index 0000000000..9a339b0bbe
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/configure.in
@@ -0,0 +1,97 @@
+dnl Process this file with autoconf to produce a configure script.
+K5_AC_INIT(db/db.c)
+AC_CONFIG_HEADER(include/config.h include/db-config.h)
+build_dynobj=yes
+CONFIG_RULES
+
+AC_PATH_PROG(FALSE,false,:)
+AC_PATH_PROG(SH,sh,$FALSE)
+AC_PATH_PROG(SH5,sh5,$FALSE)
+AC_PATH_PROG(BASH,bash,$FALSE)
+
+AC_CACHE_CHECK([checking for shell with functions],local_cv_program_fctsh,
+[if $SH -c 'foo() { true; }; foo' > /dev/null 2>&1; then
+	local_cv_program_fctsh=$SH
+else
+	if $SH5 -c 'foo() { true; }; foo' > /dev/null 2>&1; then
+		local_cv_program_fctsh=$SH5
+	else
+		if $BASH -c 'foo() { true; }; foo' > /dev/null 2>&1; then
+			local_cv_program_fctsh=$BASH
+		else
+			local_cv_program_fctsh=$FALSE
+		fi
+	fi
+fi])
+
+FCTSH=$local_cv_program_fctsh
+AC_SUBST(FCTSH)
+
+dnl checks for libraries
+dnl checks for header files
+AC_CHECK_HEADERS(unistd.h stdint.h inttypes.h)
+dnl checks for typedefs
+AC_TYPE_SIZE_T
+
+dnl AC_COMPILE_TYPE(TYPE, DEFAULT)
+AC_DEFUN(AC_COMPILE_TYPE,
+[AC_REQUIRE([AC_HEADER_STDC])dnl
+AC_MSG_CHECKING(for $1)
+AC_CACHE_VAL(ac_cv_type_$1,
+[AC_TRY_COMPILE([#include <sys/types.h>
+#if STDC_HEADERS
+#include <stdlib.h>
+#endif], [$1 test_variable;], ac_cv_type_$1=yes, ac_cv_type_$1=no)])dnl
+AC_MSG_RESULT($ac_cv_type_$1)
+if test $ac_cv_type_$1 = no; then
+  AC_DEFINE($1, $2, [Define to \`$2' if not defined on system])
+fi
+])
+
+
+AC_CHECK_TYPE(ssize_t, int)
+
+AC_CHECK_TYPE(u_char, unsigned char)
+AC_CHECK_TYPE(u_int, unsigned int)
+AC_CHECK_TYPE(u_long, unsigned long)
+
+AC_CHECK_TYPE(int8_t, signed char)
+AC_CHECK_TYPE(u_int8_t, unsigned char)
+AC_CHECK_TYPE(int16_t, short)
+AC_CHECK_TYPE(u_int16_t, unsigned short)
+AC_COMPILE_TYPE(int32_t, int)
+AC_COMPILE_TYPE(u_int32_t, unsigned int)
+
+dnl checks for structures
+dnl checks for compiler characteristics
+dnl AC_C_BIGENDIAN - No, check at compile time; Darwin can build for multiple
+dnl                  targets in one tree.
+AC_CHECK_HEADERS(endian.h machine/endian.h sys/param.h)
+dnl sys/param.h for AIX 4.3.3 (actually sys/machine.h)
+dnl There's also sys/endian.h on IRIX, but we already check _MIPSE{L,B}.
+AC_C_CONST
+AC_CHECK_SIZEOF(int)
+
+dnl checks for library functions
+AC_CHECK_FUNC(memmove, ,
+[MEMMOVE_OBJ=memmove.o
+AC_DEFINE(memmove, kdb2__memmove,[Define to kdb2__memmove to provide private memmove function])
+AC_DEFINE(MEMMOVE,1,[Define if memmove.o is compiled in])])
+AC_SUBST(MEMMOVE_OBJ)
+
+AC_CHECK_FUNC(mkstemp, ,
+[MKSTEMP_OBJ=mkstemp.o
+AC_DEFINE(mkstemp, kdb2__mkstemp,[Define to \`kdb2__mkstemp' to provide private mkstemp function])])
+AC_SUBST(MKSTEMP_OBJ)
+
+AC_CHECK_FUNC(strerror, ,
+[STRERROR_OBJ=strerror.o
+AC_DEFINE(strerror, kdb2__strerror,[Define to \`kdb2__strerror' to provide private strerror function])])
+AC_SUBST(STRERROR_OBJ)
+
+KRB5_BUILD_LIBRARY
+KRB5_BUILD_LIBOBJS
+KRB5_BUILD_PROGRAM
+KRB5_RUN_FLAGS
+AC_CONFIG_FILES(include/generated.stmp:Makefile.in)
+V5_AC_OUTPUT_MAKEFILE(. hash btree db mpool recno clib test)
diff --git a/src/plugins/kdb/db2/libdb2/db/Makefile.in b/src/plugins/kdb/db2/libdb2/db/Makefile.in
new file mode 100644
index 0000000000..074bb7f329
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/db/Makefile.in
@@ -0,0 +1,11 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/db
+mydir=db
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+STLIBOBJS=db.o
+
+LOCALINCLUDES=	-I. -I$(srcdir)/../include -I../include -I$(srcdir)/../mpool
+
+all-unix:: all-libobjs
+clean-unix:: clean-libobjs
+# @libobj_frag@
diff --git a/src/plugins/kdb/db2/libdb2/db/Makefile.inc b/src/plugins/kdb/db2/libdb2/db/Makefile.inc
new file mode 100644
index 0000000000..59478ba198
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/db/Makefile.inc
@@ -0,0 +1,5 @@
+#       @(#)Makefile.inc	8.1 (Berkeley) 6/4/93
+
+.PATH: ${.CURDIR}/db/db
+
+SRCS+=	db.c
diff --git a/src/plugins/kdb/db2/libdb2/db/db.c b/src/plugins/kdb/db2/libdb2/db/db.c
new file mode 100644
index 0000000000..fba7795342
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/db/db.c
@@ -0,0 +1,99 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)db.c	8.4 (Berkeley) 2/21/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "db-int.h"
+
+DB *
+kdb2_dbopen(fname, flags, mode, type, openinfo)
+	const char *fname;
+	int flags, mode;
+	DBTYPE type;
+	const void *openinfo;
+{
+
+#define	DB_FLAGS	(DB_LOCK | DB_SHMEM | DB_TXN)
+#define	USE_OPEN_FLAGS							\
+	(O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY |		\
+	 O_RDWR | O_SHLOCK | O_TRUNC | O_BINARY)
+
+	if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
+		switch (type) {
+		case DB_BTREE:
+			return (__bt_open(fname, flags & USE_OPEN_FLAGS,
+			    mode, openinfo, flags & DB_FLAGS));
+		case DB_HASH:
+			return (__hash_open(fname, flags & USE_OPEN_FLAGS,
+			    mode, openinfo, flags & DB_FLAGS));
+		case DB_RECNO:
+			return (__rec_open(fname, flags & USE_OPEN_FLAGS,
+			    mode, openinfo, flags & DB_FLAGS));
+		}
+	errno = EINVAL;
+	return (NULL);
+}
+
+static int
+__dberr()
+{
+	return (RET_ERROR);
+}
+
+/*
+ * __DBPANIC -- Stop.
+ *
+ * Parameters:
+ *	dbp:	pointer to the DB structure.
+ */
+void
+__dbpanic(dbp)
+	DB *dbp;
+{
+	/* The only thing that can succeed is a close. */
+	dbp->del = (int (*)())__dberr;
+	dbp->fd = (int (*)())__dberr;
+	dbp->get = (int (*)())__dberr;
+	dbp->put = (int (*)())__dberr;
+	dbp->seq = (int (*)())__dberr;
+	dbp->sync = (int (*)())__dberr;
+}
diff --git a/src/plugins/kdb/db2/libdb2/docs/btree.3.ps b/src/plugins/kdb/db2/libdb2/docs/btree.3.ps
new file mode 100644
index 0000000000..c79c97232c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/btree.3.ps
@@ -0,0 +1,366 @@
+%!PS-Adobe-3.0
+%%Creator: groff version 1.08
+%%DocumentNeededResources: font Times-Roman
+%%+ font Times-Bold
+%%+ font Times-Italic
+%%DocumentSuppliedResources: procset grops 1.08 0
+%%Pages: 2
+%%PageOrder: Ascend
+%%Orientation: Portrait
+%%EndComments
+%%BeginProlog
+%%BeginResource: procset grops 1.08 0
+/setpacking where{
+pop
+currentpacking
+true setpacking
+}if
+/grops 120 dict dup begin
+/SC 32 def
+/A/show load def
+/B{0 SC 3 -1 roll widthshow}bind def
+/C{0 exch ashow}bind def
+/D{0 exch 0 SC 5 2 roll awidthshow}bind def
+/E{0 rmoveto show}bind def
+/F{0 rmoveto 0 SC 3 -1 roll widthshow}bind def
+/G{0 rmoveto 0 exch ashow}bind def
+/H{0 rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/I{0 exch rmoveto show}bind def
+/J{0 exch rmoveto 0 SC 3 -1 roll widthshow}bind def
+/K{0 exch rmoveto 0 exch ashow}bind def
+/L{0 exch rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/M{rmoveto show}bind def
+/N{rmoveto 0 SC 3 -1 roll widthshow}bind def
+/O{rmoveto 0 exch ashow}bind def
+/P{rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/Q{moveto show}bind def
+/R{moveto 0 SC 3 -1 roll widthshow}bind def
+/S{moveto 0 exch ashow}bind def
+/T{moveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/SF{
+findfont exch
+[exch dup 0 exch 0 exch neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/MF{
+findfont
+[5 2 roll
+0 3 1 roll 
+neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/level0 0 def
+/RES 0 def
+/PL 0 def
+/LS 0 def
+/PLG{
+gsave newpath clippath pathbbox grestore
+exch pop add exch pop
+}bind def
+/BP{
+/level0 save def
+1 setlinecap
+1 setlinejoin
+72 RES div dup scale
+LS{
+90 rotate
+}{
+0 PL translate
+}ifelse
+1 -1 scale
+}bind def
+/EP{
+level0 restore
+showpage
+}bind def
+/DA{
+newpath arcn stroke
+}bind def
+/SN{
+transform
+.25 sub exch .25 sub exch
+round .25 add exch round .25 add exch
+itransform
+}bind def
+/DL{
+SN
+moveto
+SN
+lineto stroke
+}bind def
+/DC{
+newpath 0 360 arc closepath
+}bind def
+/TM matrix def
+/DE{
+TM currentmatrix pop
+translate scale newpath 0 0 .5 0 360 arc closepath
+TM setmatrix
+}bind def
+/RC/rcurveto load def
+/RL/rlineto load def
+/ST/stroke load def
+/MT/moveto load def
+/CL/closepath load def
+/FL{
+currentgray exch setgray fill setgray
+}bind def
+/BL/fill load def
+/LW/setlinewidth load def
+/RE{
+findfont
+dup maxlength 1 index/FontName known not{1 add}if dict begin
+{
+1 index/FID ne{def}{pop pop}ifelse
+}forall
+/Encoding exch def
+dup/FontName exch def
+currentdict end definefont pop
+}bind def
+/DEFS 0 def
+/EBEGIN{
+moveto
+DEFS begin
+}bind def
+/EEND/end load def
+/CNT 0 def
+/level1 0 def
+/PBEGIN{
+/level1 save def
+translate
+div 3 1 roll div exch scale
+neg exch neg exch translate
+0 setgray
+0 setlinecap
+1 setlinewidth
+0 setlinejoin
+10 setmiterlimit
+[]0 setdash
+/setstrokeadjust where{
+pop
+false setstrokeadjust
+}if
+/setoverprint where{
+pop
+false setoverprint
+}if
+newpath
+/CNT countdictstack def
+userdict begin
+/showpage{}def
+}bind def
+/PEND{
+clear
+countdictstack CNT sub{end}repeat
+level1 restore
+}bind def
+end def
+/setpacking where{
+pop
+setpacking
+}if
+%%EndResource
+%%IncludeResource: font Times-Roman
+%%IncludeResource: font Times-Bold
+%%IncludeResource: font Times-Italic
+grops begin/DEFS 1 dict def DEFS begin/u{.001 mul}bind def end/RES 72 def/PL
+792 def/LS false def/ENC0[/asciicircum/asciitilde/Scaron/Zcaron/scaron/zcaron
+/Ydieresis/trademark/quotesingle/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/space
+/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft
+/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four
+/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C
+/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash
+/bracketright/circumflex/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q
+/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/tilde/.notdef/quotesinglbase
+/guillemotleft/guillemotright/bullet/florin/fraction/perthousand/dagger
+/daggerdbl/endash/emdash/ff/fi/fl/ffi/ffl/dotlessi/dotlessj/grave/hungarumlaut
+/dotaccent/breve/caron/ring/ogonek/quotedblleft/quotedblright/oe/lslash
+/quotedblbase/OE/Lslash/.notdef/exclamdown/cent/sterling/currency/yen/brokenbar
+/section/dieresis/copyright/ordfeminine/guilsinglleft/logicalnot/minus
+/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu
+/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guilsinglright
+/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde
+/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
+/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis
+/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute
+/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve
+/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex
+/udieresis/yacute/thorn/ydieresis]def/Times-Italic@0 ENC0/Times-Italic RE
+/Times-Bold@0 ENC0/Times-Bold RE/Times-Roman@0 ENC0/Times-Roman RE
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 132.34(BTREE\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 132.34(anual BTREE\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72 84 S
+(ME).18 E F0(btree \255 btree database access method)108 96 Q F1(SYNOPSIS)72
+112.8 Q/F2 10/Times-Bold@0 SF(#include <sys/types.h>)108 124.8 Q(#include <db)
+108 136.8 Q(.h>)-.4 E F1(DESCRIPTION)72 153.6 Q F0 .198(The routine)108 165.6 R
+/F3 10/Times-Italic@0 SF(dbopen)2.698 E F0 .198(is the library interf)2.698 F
+.198(ace to database \214les.)-.1 F .198
+(One of the supported \214le formats is btree \214les.)5.198 F .974
+(The general description of the database access methods is in)108 177.6 R F3
+(dbopen)3.475 E F0 .975(\(3\), this manual page describes only).24 F
+(the btree speci\214c information.)108 189.6 Q(The btree data structure is a s\
+orted, balanced tree structure storing associated k)108 206.4 Q -.15(ey)-.1 G
+(/data pairs.).15 E .504(The btree access method speci\214c data structure pro)
+108 223.2 R .504(vided to)-.15 F F3(dbopen)3.004 E F0 .503
+(is de\214ned in the <db)3.003 F .503(.h> include \214le as)-.4 F(follo)108
+235.2 Q(ws:)-.25 E(typedef struct {)108 252 Q(u_long \215ags;)144 264 Q
+(u_int cachesize;)144 276 Q(inde)144 288 Q(x_t psize;)-.15 E(int lorder;)144
+300 Q(int mink)144 312 Q -.15(ey)-.1 G(page;).15 E
+(int \(*compare\)\(const DBT *k)144 324 Q -.15(ey)-.1 G(1, const DBT *k).15 E
+-.15(ey)-.1 G(2\);).15 E(int \(*pre\214x\)\(const DBT *k)144 336 Q -.15(ey)-.1
+G(1, const DBT *k).15 E -.15(ey)-.1 G(2\);).15 E 2.5(}B)108 348 S(TREEINFO;)
+121.97 348 Q(The elements of this structure are as follo)108 364.8 Q(ws:)-.25 E
+14.61(\215ags The)108 381.6 R(\215ag v)2.5 E(alue is speci\214ed by)-.25 E F3
+(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)313.2 381.6 S(he follo)321.81
+381.6 Q(wing v)-.25 E(alues:)-.25 E(R_DUP)144 398.4 Q 1.296(Permit duplicate k)
+180 410.4 R -.15(ey)-.1 G 3.796(si).15 G 3.796(nt)275.578 410.4 S 1.296
+(he tree, i.e. permit insertion if the k)287.154 410.4 R 1.596 -.15(ey t)-.1 H
+3.796(ob).15 G 3.796(ei)466.878 410.4 S 1.296(nserted already)477.894 410.4 R
+-.15(ex)180 422.4 S 1.935(ists in the tree.).15 F 1.935(The def)6.935 F 1.935
+(ault beha)-.1 F(vior)-.2 E 4.435(,a)-.4 G 4.435(sd)358.215 422.4 S 1.935
+(escribed in)371.54 422.4 R F3(dbopen)4.435 E F0 1.935(\(3\), is to o).24 F
+-.15(ve)-.15 G 1.935(rwrite a).15 F .148(matching k)180 434.4 R .448 -.15(ey w)
+-.1 H .148(hen inserting a ne).15 F 2.649(wk)-.25 G .449 -.15(ey o)329.709
+434.4 T 2.649(rt).15 G 2.649(of)355.407 434.4 S .149(ail if the R_NOO)366.286
+434.4 R(VER)-.5 E .149(WRITE \215ag is speci-)-.55 F 5.972(\214ed. The)180
+446.4 R 3.472(R_DUP \215ag is o)5.972 F -.15(ve)-.15 G 3.472
+(rridden by the R_NOO).15 F(VER)-.5 E 3.471(WRITE \215ag, and if the)-.55 F
+(R_NOO)180 458.4 Q(VER)-.5 E .781
+(WRITE \215ag is speci\214ed, attempts to insert duplicate k)-.55 F -.15(ey)-.1
+G 3.282(si).15 G .782(nto the tree will)474.604 458.4 R -.1(fa)180 470.4 S(il.)
+.1 E 1.13(If the database contains duplicate k)180 487.2 R -.15(ey)-.1 G 1.129
+(s, the order of retrie).15 F -.25(va)-.25 G 3.629(lo).25 G 3.629(fk)439.644
+487.2 S -.15(ey)451.503 487.2 S 1.129(/data pairs is unde-).15 F .837
+(\214ned if the)180 499.2 R F3 -.1(ge)3.337 G(t).1 E F0 .837
+(routine is used, ho)3.337 F(we)-.25 E -.15(ve)-.25 G -.4(r,).15 G F3(seq)3.737
+E F0 .838(routine calls with the R_CURSOR \215ag set)3.337 F(will al)180 511.2
+Q -.1(wa)-.1 G(ys return the logical `).1 E(`\214rst')-.74 E 2.5('o)-.74 G 2.5
+(fa)333.85 511.2 S .3 -.15(ny g)344.12 511.2 T(roup of duplicate k).15 E -.15
+(ey)-.1 G(s.).15 E(cachesize)108 528 Q 3.056(As)144 540 S .556
+(uggested maximum size \(in bytes\) of the memory cache.)158.166 540 R .555
+(This v)5.556 F .555(alue is)-.25 F F2(only)3.055 E F0(advisory)3.055 E 3.055
+(,a)-.65 G .555(nd the)514.725 540 R .759
+(access method will allocate more memory rather than f)144 552 R 3.259
+(ail. Since)-.1 F -2.15 -.25(ev e)3.259 H .76(ry search e).25 F .76
+(xamines the root)-.15 F .055
+(page of the tree, caching the most recently used pages substantially impro)144
+564 R -.15(ve)-.15 G 2.554(sa).15 G .054(ccess time.)459.578 564 R .054
+(In addi-)5.054 F .661(tion, ph)144 576 R .662(ysical writes are delayed as lo\
+ng as possible, so a moderate cache can reduce the number)-.05 F .601
+(of I/O operations signi\214cantly)144 588 R 5.601(.O)-.65 G -.15(bv)280.744
+588 S(iously).15 E 3.101(,u)-.65 G .601(sing a cache increases \(b)324.995 588
+R .6(ut only increases\) the lik)-.2 F(eli-)-.1 E .19(hood of corruption or lo\
+st data if the system crashes while a tree is being modi\214ed.)144 600 R(If)
+5.191 E F3(cac)2.691 E(hesize)-.15 E F0(is)2.691 E 2.5(0\()144 612 S
+(no size is speci\214ed\) a def)154.83 612 Q(ault cache is used.)-.1 E 12.95
+(psize P)108 628.8 R .45
+(age size is the size \(in bytes\) of the pages used for nodes in the tree.)
+-.15 F .449(The minimum page size is)5.449 F .442
+(512 bytes and the maximum page size is 64K.)144 640.8 R(If)5.442 E F3(psize)
+2.942 E F0 .442(is 0 \(no page size is speci\214ed\) a page size)2.942 F
+(is chosen based on the underlying \214le system I/O block size.)144 652.8 Q
+9.62(lorder The)108 669.6 R 1.597(byte order for inte)4.097 F 1.596
+(gers in the stored database metadata.)-.15 F 1.596
+(The number should represent the)6.596 F .688(order as an inte)144 681.6 R .689
+(ger; for e)-.15 F .689(xample, big endian order w)-.15 F .689
+(ould be the number 4,321.)-.1 F(If)5.689 E F3(lor)3.189 E(der)-.37 E F0 .689
+(is 0 \(no)3.189 F(order is speci\214ed\) the current host order is used.)144
+693.6 Q 174.135(4.4BSD June)72 732 R(4, 1993)2.5 E(1)535 732 Q EP
+%%Page: 2 2
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 132.34(BTREE\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 132.34(anual BTREE\(3\))340.17 48 R(mink)108 84 Q -.15(ey)-.1 G(page).15
+E 1.423(The minimum number of k)144 96 R -.15(ey)-.1 G 3.923(sw).15 G 1.422
+(hich will be stored on an)282.245 96 R 3.922(ys)-.15 G 1.422(ingle page.)
+400.618 96 R 1.422(This v)6.422 F 1.422(alue is used to)-.25 F .257
+(determine which k)144 108 R -.15(ey)-.1 G 2.757(sw).15 G .257
+(ill be stored on o)242.001 108 R -.15(ve)-.15 G(r\215o).15 E 2.757(wp)-.25 G
+.257(ages, i.e. if a k)348.006 108 R .558 -.15(ey o)-.1 H 2.758(rd).15 G .258
+(ata item is longer than the)435.11 108 R 1.102(pagesize di)144 120 R 1.102
+(vided by the mink)-.25 F -.15(ey)-.1 G 1.102(page v).15 F 1.102
+(alue, it will be stored on o)-.25 F -.15(ve)-.15 G(r\215o).15 E 3.602(wp)-.25
+G 1.102(ages instead of in the)451.164 120 R(page itself.)144 132 Q(If)5 E/F1
+10/Times-Italic@0 SF(mink)2.5 E -.3(ey)-.1 G(pa).3 E -.1(ge)-.1 G F0
+(is 0 \(no minimum number of k)2.6 E -.15(ey)-.1 G 2.5(si).15 G 2.5(ss)392.84
+132 S(peci\214ed\) a v)403.12 132 Q(alue of 2 is used.)-.25 E(compare)108 148.8
+Q .751(Compare is the k)144 160.8 R 1.051 -.15(ey c)-.1 H .751
+(omparison function.).15 F .751(It must return an inte)5.751 F .752
+(ger less than, equal to, or greater)-.15 F .913(than zero if the \214rst k)144
+172.8 R 1.213 -.15(ey a)-.1 H -.18(rg).15 G .913
+(ument is considered to be respecti).18 F -.15(ve)-.25 G .913
+(ly less than, equal to, or greater).15 F .352(than the second k)144 184.8 R
+.652 -.15(ey a)-.1 H -.18(rg).15 G 2.852(ument. The).18 F .353
+(same comparison function must be used on a gi)2.852 F -.15(ve)-.25 G 2.853(nt)
+.15 G .353(ree e)503.127 184.8 R -.15(ve)-.25 G(ry).15 E .817
+(time it is opened.)144 196.8 R(If)5.817 E F1(compar)3.317 E(e)-.37 E F0 .817
+(is NULL \(no comparison function is speci\214ed\), the k)3.317 F -.15(ey)-.1 G
+3.316(sa).15 G .816(re com-)508.364 196.8 R(pared le)144 208.8 Q(xically)-.15 E
+2.5(,w)-.65 G(ith shorter k)214.57 208.8 Q -.15(ey)-.1 G 2.5(sc).15 G
+(onsidered less than longer k)282.92 208.8 Q -.15(ey)-.1 G(s.).15 E 10.17
+(pre\214x Pre\214x)108 225.6 R .291(is the pre\214x comparison function.)2.791
+F .292(If speci\214ed, this routine must return the number of bytes)5.291 F
+.937(of the second k)144 237.6 R 1.237 -.15(ey a)-.1 H -.18(rg).15 G .937
+(ument which are necessary to determine that it is greater than the \214rst k)
+.18 F -.15(ey)-.1 G(ar)144 249.6 Q 3.477(gument. If)-.18 F .977(the k)3.477 F
+-.15(ey)-.1 G 3.477(sa).15 G .977(re equal, the k)241.898 249.6 R 1.277 -.15
+(ey l)-.1 H .978(ength should be returned.).15 F .978
+(Note, the usefulness of this)5.978 F .558(routine is v)144 261.6 R .558
+(ery data dependent, b)-.15 F .558
+(ut, in some data sets can produce signi\214cantly reduced tree sizes)-.2 F
+.354(and search times.)144 273.6 R(If)5.354 E F1(pr)2.854 E(e\214x)-.37 E F0
+.354(is NULL \(no pre\214x function is speci\214ed\),)2.854 F/F2 10
+/Times-Bold@0 SF(and)2.854 E F0 .354(no comparison function)2.854 F .193
+(is speci\214ed, a def)144 285.6 R .193(ault le)-.1 F .193
+(xical comparison routine is used.)-.15 F(If)5.192 E F1(pr)2.692 E(e\214x)-.37
+E F0 .192(is NULL and a comparison rou-)2.692 F
+(tine is speci\214ed, no pre\214x comparison is done.)144 297.6 Q .79
+(If the \214le already e)108 314.4 R .79(xists \(and the O_TR)-.15 F .79
+(UNC \215ag is not speci\214ed\), the v)-.4 F .79
+(alues speci\214ed for the parameters)-.25 F
+(\215ags, lorder and psize are ignored in f)108 326.4 Q -.2(avo)-.1 G 2.5(ro).2
+G 2.5(ft)284.4 326.4 S(he v)293.01 326.4 Q(alues used when the tree w)-.25 E
+(as created.)-.1 E -.15(Fo)108 343.2 S(rw).15 E
+(ard sequential scans of a tree are from the least k)-.1 E .3 -.15(ey t)-.1 H
+2.5(ot).15 G(he greatest.)348.55 343.2 Q 1.043(Space freed up by deleting k)108
+360 R -.15(ey)-.1 G 1.043(/data pairs from the tree is ne).15 F -.15(ve)-.25 G
+3.543(rr).15 G 1.043(eclaimed, although it is normally made)378.686 360 R -.2
+(av)108 372 S 1.394(ailable for reuse.)-.05 F 1.394
+(This means that the btree storage structure is gro)6.394 F(w-only)-.25 E 6.395
+(.T)-.65 G 1.395(he only solutions are to)441.09 372 R -.2(avo)108 384 S(id e)
+.2 E(xcessi)-.15 E .3 -.15(ve d)-.25 H
+(eletions, or to create a fresh tree periodically from a scan of an e).15 E
+(xisting one.)-.15 E .344(Searches, insertions, and deletions in a btree will \
+all complete in O lg base N where base is the a)108 400.8 R -.15(ve)-.2 G .343
+(rage \214ll).15 F -.1(fa)108 412.8 S(ctor).1 E 5.798(.O)-.55 G .799
+(ften, inserting ordered data into btrees results in a lo)146.188 412.8 R 3.299
+<778c>-.25 G .799(ll f)377.505 412.8 R(actor)-.1 E 5.799(.T)-.55 G .799
+(his implementation has been)423.443 412.8 R(modi\214ed to mak)108 424.8 Q 2.5
+(eo)-.1 G(rdered insertion the best case, resulting in a much better than norm\
+al page \214ll f)185.4 424.8 Q(actor)-.1 E(.)-.55 E/F3 9/Times-Bold@0 SF
+(SEE ALSO)72 441.6 Q F1(dbopen)108 453.6 Q F0(\(3\),).24 E F1(hash)2.5 E F0
+(\(3\),).28 E F1(mpool)2.5 E F0(\(3\),).51 E F1 -.37(re)2.5 G(cno).37 E F0
+(\(3\)).18 E F1(The Ubiquitous B-tr)108 477.6 Q(ee)-.37 E F0 2.5(,D).18 G
+(ouglas Comer)209.47 477.6 Q 2.5(,A)-.4 G(CM Comput. Surv)276.72 477.6 Q 2.5
+(.1)-.65 G(1, 2 \(June 1979\), 121-138.)360.25 477.6 Q F1(Pr)108 501.6 Q 1.588
+(e\214x B-tr)-.37 F(ees)-.37 E F0 4.088(,B).27 G 1.587(ayer and Unterauer)
+177.636 501.6 R 4.087(,A)-.4 G 1.587(CM T)270.447 501.6 R 1.587
+(ransactions on Database Systems, V)-.35 F 1.587(ol. 2, 1 \(March 1977\),)-1.29
+F(11-26.)108 513.6 Q F1(The Art of Computer Pr)108 537.6 Q -.1(og)-.45 G -.15
+(ra).1 G(mming V).15 E(ol. 3: Sorting and Sear)-1.11 E -.15(ch)-.37 G(ing).15 E
+F0 2.5(,D).22 G(.E. Knuth, 1968, pp 471-480.)382 537.6 Q F3 -.09(BU)72 554.4 S
+(GS).09 E F0(Only big and little endian byte order is supported.)108 566.4 Q
+174.135(4.4BSD June)72 732 R(4, 1993)2.5 E(2)535 732 Q EP
+%%Trailer
+end
+%%EOF
diff --git a/src/plugins/kdb/db2/libdb2/docs/dbopen.3.ps b/src/plugins/kdb/db2/libdb2/docs/dbopen.3.ps
new file mode 100644
index 0000000000..c621bef97d
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/dbopen.3.ps
@@ -0,0 +1,508 @@
+%!PS-Adobe-3.0
+%%Creator: groff version 1.08
+%%DocumentNeededResources: font Times-Roman
+%%+ font Times-Bold
+%%+ font Times-Italic
+%%DocumentSuppliedResources: procset grops 1.08 0
+%%Pages: 4
+%%PageOrder: Ascend
+%%Orientation: Portrait
+%%EndComments
+%%BeginProlog
+%%BeginResource: procset grops 1.08 0
+/setpacking where{
+pop
+currentpacking
+true setpacking
+}if
+/grops 120 dict dup begin
+/SC 32 def
+/A/show load def
+/B{0 SC 3 -1 roll widthshow}bind def
+/C{0 exch ashow}bind def
+/D{0 exch 0 SC 5 2 roll awidthshow}bind def
+/E{0 rmoveto show}bind def
+/F{0 rmoveto 0 SC 3 -1 roll widthshow}bind def
+/G{0 rmoveto 0 exch ashow}bind def
+/H{0 rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/I{0 exch rmoveto show}bind def
+/J{0 exch rmoveto 0 SC 3 -1 roll widthshow}bind def
+/K{0 exch rmoveto 0 exch ashow}bind def
+/L{0 exch rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/M{rmoveto show}bind def
+/N{rmoveto 0 SC 3 -1 roll widthshow}bind def
+/O{rmoveto 0 exch ashow}bind def
+/P{rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/Q{moveto show}bind def
+/R{moveto 0 SC 3 -1 roll widthshow}bind def
+/S{moveto 0 exch ashow}bind def
+/T{moveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/SF{
+findfont exch
+[exch dup 0 exch 0 exch neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/MF{
+findfont
+[5 2 roll
+0 3 1 roll 
+neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/level0 0 def
+/RES 0 def
+/PL 0 def
+/LS 0 def
+/PLG{
+gsave newpath clippath pathbbox grestore
+exch pop add exch pop
+}bind def
+/BP{
+/level0 save def
+1 setlinecap
+1 setlinejoin
+72 RES div dup scale
+LS{
+90 rotate
+}{
+0 PL translate
+}ifelse
+1 -1 scale
+}bind def
+/EP{
+level0 restore
+showpage
+}bind def
+/DA{
+newpath arcn stroke
+}bind def
+/SN{
+transform
+.25 sub exch .25 sub exch
+round .25 add exch round .25 add exch
+itransform
+}bind def
+/DL{
+SN
+moveto
+SN
+lineto stroke
+}bind def
+/DC{
+newpath 0 360 arc closepath
+}bind def
+/TM matrix def
+/DE{
+TM currentmatrix pop
+translate scale newpath 0 0 .5 0 360 arc closepath
+TM setmatrix
+}bind def
+/RC/rcurveto load def
+/RL/rlineto load def
+/ST/stroke load def
+/MT/moveto load def
+/CL/closepath load def
+/FL{
+currentgray exch setgray fill setgray
+}bind def
+/BL/fill load def
+/LW/setlinewidth load def
+/RE{
+findfont
+dup maxlength 1 index/FontName known not{1 add}if dict begin
+{
+1 index/FID ne{def}{pop pop}ifelse
+}forall
+/Encoding exch def
+dup/FontName exch def
+currentdict end definefont pop
+}bind def
+/DEFS 0 def
+/EBEGIN{
+moveto
+DEFS begin
+}bind def
+/EEND/end load def
+/CNT 0 def
+/level1 0 def
+/PBEGIN{
+/level1 save def
+translate
+div 3 1 roll div exch scale
+neg exch neg exch translate
+0 setgray
+0 setlinecap
+1 setlinewidth
+0 setlinejoin
+10 setmiterlimit
+[]0 setdash
+/setstrokeadjust where{
+pop
+false setstrokeadjust
+}if
+/setoverprint where{
+pop
+false setoverprint
+}if
+newpath
+/CNT countdictstack def
+userdict begin
+/showpage{}def
+}bind def
+/PEND{
+clear
+countdictstack CNT sub{end}repeat
+level1 restore
+}bind def
+end def
+/setpacking where{
+pop
+setpacking
+}if
+%%EndResource
+%%IncludeResource: font Times-Roman
+%%IncludeResource: font Times-Bold
+%%IncludeResource: font Times-Italic
+grops begin/DEFS 1 dict def DEFS begin/u{.001 mul}bind def end/RES 72 def/PL
+792 def/LS false def/ENC0[/asciicircum/asciitilde/Scaron/Zcaron/scaron/zcaron
+/Ydieresis/trademark/quotesingle/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/space
+/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft
+/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four
+/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C
+/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash
+/bracketright/circumflex/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q
+/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/tilde/.notdef/quotesinglbase
+/guillemotleft/guillemotright/bullet/florin/fraction/perthousand/dagger
+/daggerdbl/endash/emdash/ff/fi/fl/ffi/ffl/dotlessi/dotlessj/grave/hungarumlaut
+/dotaccent/breve/caron/ring/ogonek/quotedblleft/quotedblright/oe/lslash
+/quotedblbase/OE/Lslash/.notdef/exclamdown/cent/sterling/currency/yen/brokenbar
+/section/dieresis/copyright/ordfeminine/guilsinglleft/logicalnot/minus
+/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu
+/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guilsinglright
+/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde
+/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
+/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis
+/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute
+/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve
+/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex
+/udieresis/yacute/thorn/ydieresis]def/Times-Italic@0 ENC0/Times-Italic RE
+/Times-Bold@0 ENC0/Times-Bold RE/Times-Roman@0 ENC0/Times-Roman RE
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.01(DBOPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.01(anual DBOPEN\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72
+84 S(ME).18 E F0(dbopen \255 database access methods)108 96 Q F1(SYNOPSIS)72
+112.8 Q/F2 10/Times-Bold@0 SF(#include <sys/types.h>)108 124.8 Q
+(#include <limits.h>)108 136.8 Q(#include <db)108 148.8 Q(.h>)-.4 E(DB *)108
+172.8 Q(dbopen\(const char *\214le, int \215ags, int mode, DBTYPE type,)108
+184.8 Q(const v)158 196.8 Q(oid *openinf)-.1 E(o\);)-.25 E F1(DESCRIPTION)72
+213.6 Q/F3 10/Times-Italic@0 SF(Dbopen)108 225.6 Q F0 .032
+(is the library interf)2.532 F .031(ace to database \214les.)-.1 F .031
+(The supported \214le formats are btree, hashed and UNIX \214le)5.031 F 2.82
+(oriented. The)108 237.6 R .32
+(btree format is a representation of a sorted, balanced tree structure.)2.82 F
+.321(The hashed format is an)5.321 F -.15(ex)108 249.6 S .424
+(tensible, dynamic hashing scheme.).15 F .423
+(The \215at-\214le format is a byte stream \214le with \214x)5.423 F .423
+(ed or v)-.15 F .423(ariable length)-.25 F 2.906(records. The)108 261.6 R .407
+(formats and \214le format speci\214c information are described in detail in t\
+heir respecti)2.906 F .707 -.15(ve m)-.25 H(anual).15 E(pages)108 273.6 Q F3
+(btr)2.5 E(ee)-.37 E F0(\(3\),).18 E F3(hash)2.5 E F0(\(3\) and).28 E F3 -.37
+(re)2.5 G(cno).37 E F0(\(3\).).18 E .433(Dbopen opens)108 290.4 R F3(\214le)
+2.933 E F0 .433(for reading and/or writing.)2.933 F .433(Files ne)5.433 F -.15
+(ve)-.25 G 2.933(ri).15 G .433(ntended to be preserv)346.737 290.4 R .433
+(ed on disk may be created)-.15 F(by setting the \214le parameter to NULL.)108
+302.4 Q(The)108 319.2 Q F3<8d61>4.661 E(gs)-.1 E F0(and)4.661 E F3 2.161
+(mode ar)4.661 F(guments)-.37 E F0 2.161(are as speci\214ed to the)4.661 F F3
+(open)4.661 E F0 2.162(\(2\) routine, ho).24 F(we)-.25 E -.15(ve)-.25 G 2.962
+-.4(r, o).15 H 2.162(nly the O_CREA).4 F -.74(T,)-1.11 G .128
+(O_EXCL, O_EXLOCK, O_NONBLOCK, O_RDONL)108 331.2 R 2.708 -1.29(Y, O)-1 H(_RD)
+1.29 E .128(WR, O_SHLOCK and O_TR)-.3 F .127(UNC \215ags are)-.4 F 2.5
+(meaningful. \(Note,)108 343.2 R(opening a database \214le O_WR)2.5 E(ONL)-.4 E
+2.5(Yi)-1 G 2.5(sn)342.67 343.2 S(ot possible.\))354.06 343.2 Q(The)108 360 Q
+F3(type)5.337 E F0(ar)5.337 E 2.837
+(gument is of type DBTYPE \(as de\214ned in the <db)-.18 F 2.838
+(.h> include \214le\) and may be set to)-.4 F(DB_BTREE, DB_HASH or DB_RECNO.)
+108 372 Q(The)108 388.8 Q F3(openinfo)2.85 E F0(ar)2.85 E .349(gument is a poi\
+nter to an access method speci\214c structure described in the access method')
+-.18 F(s)-.55 E .03(manual page.)108 400.8 R(If)5.03 E F3(openinfo)2.53 E F0
+.031(is NULL, each access method will use def)2.53 F .031
+(aults appropriate for the system and the)-.1 F(access method.)108 412.8 Q F3
+(Dbopen)108 429.6 Q F0 .416
+(returns a pointer to a DB structure on success and NULL on error)2.917 F 5.416
+(.T)-.55 G .416(he DB structure is de\214ned in)423.21 429.6 R(the <db)108
+441.6 Q(.h> include \214le, and contains at least the follo)-.4 E
+(wing \214elds:)-.25 E(typedef struct {)108 465.6 Q(DBTYPE type;)144 477.6 Q
+(int \(*close\)\(const DB *db\);)144 489.6 Q
+(int \(*del\)\(const DB *db, const DBT *k)144 501.6 Q -.15(ey)-.1 G 2.5(,u)-.5
+G(_int \215ags\);)318.92 501.6 Q(int \(*fd\)\(const DB *db\);)144 513.6 Q
+(int \(*get\)\(const DB *db, DBT *k)144 525.6 Q -.15(ey)-.1 G 2.5(,D)-.5 G
+(BT *data, u_int \215ags\);)297.53 525.6 Q(int \(*put\)\(const DB *db, DBT *k)
+144 537.6 Q -.15(ey)-.1 G 2.5(,c)-.5 G(onst DBT *data,)295.31 537.6 Q
+(u_int \215ags\);)194 549.6 Q(int \(*sync\)\(const DB *db, u_int \215ags\);)144
+561.6 Q(int \(*seq\)\(const DB *db, DBT *k)144 573.6 Q -.15(ey)-.1 G 2.5(,D)-.5
+G(BT *data, u_int \215ags\);)298.64 573.6 Q 2.5(}D)108 585.6 S(B;)122.52 585.6
+Q .101
+(These elements describe a database type and a set of functions performing v)
+108 602.4 R .101(arious actions.)-.25 F .101(These functions)5.101 F(tak)108
+614.4 Q 3.039(eap)-.1 G .539(ointer to a structure as returned by)140.078 614.4
+R F3(dbopen)3.038 E F0 3.038(,a).24 G .538
+(nd sometimes one or more pointers to k)323.196 614.4 R -.15(ey)-.1 G .538
+(/data struc-).15 F(tures and a \215ag v)108 626.4 Q(alue.)-.25 E 16.28
+(type The)108 643.2 R
+(type of the underlying access method \(and \214le format\).)2.5 E 12.95
+(close A)108 660 R .988(pointer to a routine to \215ush an)3.488 F 3.489(yc)
+-.15 G .989(ached information to disk, free an)293.968 660 R 3.489(ya)-.15 G
+.989(llocated resources, and)446.662 660 R .112
+(close the underlying \214le\(s\).)144 672 R .111(Since k)5.112 F -.15(ey)-.1 G
+.111(/data pairs may be cached in memory).15 F 2.611(,f)-.65 G .111
+(ailing to sync the \214le)455.666 672 R .494(with a)144 684 R F3(close)2.994 E
+F0(or)2.994 E F3(sync)2.994 E F0 .495
+(function may result in inconsistent or lost information.)2.994 F F3(Close)
+5.495 E F0 .495(routines return)2.995 F(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15
+G(istrib)132.57 732 Q 89.875(ution September)-.2 F(13, 1993)2.5 E(1)535 732 Q
+EP
+%%Page: 2 2
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.01(DBOPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.01(anual DBOPEN\(3\))340.17 48 R(-1 on error \(setting)144 84 Q
+/F1 10/Times-Italic@0 SF(errno)2.5 E F0 2.5(\)a).18 G(nd 0 on success.)254.43
+84 Q 21.28(del A)108 100.8 R(pointer to a routine to remo)2.5 E .3 -.15(ve k)
+-.15 H -.15(ey).05 G(/data pairs from the database.).15 E(The parameter)144
+117.6 Q F1<8d61>2.5 E(g)-.1 E F0(may be set to the follo)2.5 E(wing v)-.25 E
+(alue:)-.25 E(R_CURSOR)144 134.4 Q .289
+(Delete the record referenced by the cursor)180 146.4 R 5.288(.T)-.55 G .288
+(he cursor must ha)363.342 146.4 R .588 -.15(ve p)-.2 H(re).15 E .288
+(viously been initial-)-.25 F(ized.)180 158.4 Q F1(Delete)144 175.2 Q F0 .03
+(routines return -1 on error \(setting)2.53 F F1(errno)2.53 E F0 .03
+(\), 0 on success, and 1 if the speci\214ed).18 F F1 -.1(ke)2.53 G(y)-.2 E F0
+-.1(wa)2.53 G 2.53(sn).1 G .03(ot in)521.91 175.2 R(the \214le.)144 187.2 Q
+25.17(fd A)108 204 R .451
+(pointer to a routine which returns a \214le descriptor representati)2.951 F
+.75 -.15(ve o)-.25 H 2.95(ft).15 G .45(he underlying database.)431.73 204 R(A)
+5.45 E .942(\214le descriptor referencing the same \214le will be returned to \
+all processes which call)144 216 R F1(dbopen)3.442 E F0(with)3.442 E 1.629
+(the same)144 228 R F1(\214le)4.129 E F0 4.129(name. This)4.129 F 1.628
+(\214le descriptor may be safely used as a ar)4.128 F 1.628(gument to the)-.18
+F F1(fcntl)4.128 E F0 1.628(\(2\) and).51 F F1(\215oc)144 240 Q(k)-.2 E F0 .425
+(\(2\) locking functions.).67 F .425
+(The \214le descriptor is not necessarily associated with an)5.425 F 2.925(yo)
+-.15 G 2.925(ft)492.7 240 S .425(he under)501.735 240 R(-)-.2 E .198
+(lying \214les used by the access method.)144 252 R .198
+(No \214le descriptor is a)5.198 F -.25(va)-.2 G .198
+(ilable for in memory databases.).25 F F1(Fd)5.198 E F0
+(routines return -1 on error \(setting)144 264 Q F1(errno)2.5 E F0
+(\), and the \214le descriptor on success.).18 E 21.28(get A)108 280.8 R
+(pointer to a routine which is the interf)2.5 E .001(ace for k)-.1 F -.15(ey)
+-.1 G .001(ed retrie).15 F -.25(va)-.25 G 2.501(lf).25 G .001
+(rom the database.)399.755 280.8 R .001(The address and)5.001 F .061
+(length of the data associated with the speci\214ed)144 292.8 R F1 -.1(ke)2.561
+G(y)-.2 E F0 .06(are returned in the structure referenced by)2.561 F F1(data)
+2.56 E F0(.).26 E F1(Get)144 304.8 Q F0(routines return -1 on error \(setting)
+2.5 E F1(errno)2.5 E F0(\), 0 on success, and 1 if the).18 E F1 -.1(ke)2.5 G(y)
+-.2 E F0 -.1(wa)2.5 G 2.5(sn).1 G(ot in the \214le.)471.66 304.8 Q 20.72(put A)
+108 321.6 R(pointer to a routine to store k)2.5 E -.15(ey)-.1 G
+(/data pairs in the database.).15 E(The parameter)144 338.4 Q F1<8d61>2.5 E(g)
+-.1 E F0(may be set to one of the follo)2.5 E(wing v)-.25 E(alues:)-.25 E
+(R_CURSOR)144 355.2 Q .051(Replace the k)180 367.2 R -.15(ey)-.1 G .051
+(/data pair referenced by the cursor).15 F 5.052(.T)-.55 G .052
+(he cursor must ha)393.98 367.2 R .352 -.15(ve p)-.2 H(re).15 E .052
+(viously been)-.25 F(initialized.)180 379.2 Q(R_IAFTER)144 396 Q 1.165
+(Append the data immediately after the data referenced by)180 408 R F1 -.1(ke)
+3.664 G(y)-.2 E F0 3.664(,c).32 G 1.164(reating a ne)446.758 408 R 3.664(wk)
+-.25 G -.15(ey)511.27 408 S(/data).15 E(pair)180 420 Q 6.065(.T)-.55 G 1.065
+(he record number of the appended k)209.675 420 R -.15(ey)-.1 G 1.065
+(/data pair is returned in the).15 F F1 -.1(ke)3.565 G(y)-.2 E F0(structure.)
+3.565 E(\(Applicable only to the DB_RECNO access method.\))180 432 Q(R_IBEFORE)
+144 448.8 Q 1.293(Insert the data immediately before the data referenced by)180
+460.8 R F1 -.1(ke)3.793 G(y)-.2 E F0 3.793(,c).32 G 1.293(reating a ne)446.371
+460.8 R 3.793(wk)-.25 G -.15(ey)511.27 460.8 S(/data).15 E(pair)180 472.8 Q
+6.54(.T)-.55 G 1.54(he record number of the inserted k)210.15 472.8 R -.15(ey)
+-.1 G 1.541(/data pair is returned in the).15 F F1 -.1(ke)4.041 G(y)-.2 E F0
+(structure.)4.041 E(\(Applicable only to the DB_RECNO access method.\))180
+484.8 Q(R_NOO)144 501.6 Q(VER)-.5 E(WRITE)-.55 E(Enter the ne)180 513.6 Q 2.5
+(wk)-.25 G -.15(ey)242.69 513.6 S(/data pair only if the k).15 E .3 -.15(ey d)
+-.1 H(oes not pre).15 E(viously e)-.25 E(xist.)-.15 E(R_SETCURSOR)144 530.4 Q
+1.36(Store the k)180 542.4 R -.15(ey)-.1 G 1.36(/data pair).15 F 3.86(,s)-.4 G
+1.359(etting or initializing the position of the cursor to reference it.)283.94
+542.4 R(\(Applicable only to the DB_BTREE and DB_RECNO access methods.\))180
+554.4 Q .563(R_SETCURSOR is a)144 571.2 R -.25(va)-.2 G .564
+(ilable only for the DB_BTREE and DB_RECNO access methods because).25 F
+(it implies that the k)144 583.2 Q -.15(ey)-.1 G 2.5(sh).15 G -2.25 -.2(av e)
+241.81 583.2 T(an inherent order which does not change.)2.7 E .416
+(R_IAFTER and R_IBEFORE are a)144 600 R -.25(va)-.2 G .416
+(ilable only for the DB_RECNO access method because the).25 F(y)-.15 E 1.221
+(each imply that the access method is able to create ne)144 612 R 3.722(wk)-.25
+G -.15(ey)385.644 612 S 3.722(s. This).15 F 1.222(is only true if the k)3.722 F
+-.15(ey)-.1 G 3.722(sa).15 G(re)532.23 612 Q
+(ordered and independent, record numbers for e)144 624 Q(xample.)-.15 E .289
+(The def)144 640.8 R .289(ault beha)-.1 F .289(vior of the)-.2 F F1(put)2.789 E
+F0 .289(routines is to enter the ne)2.789 F 2.789(wk)-.25 G -.15(ey)388.998
+640.8 S .288(/data pair).15 F 2.788(,r)-.4 G .288(eplacing an)444.284 640.8 R
+2.788(yp)-.15 G(re)503.03 640.8 Q(viously)-.25 E -.15(ex)144 652.8 S(isting k)
+.15 E -.15(ey)-.1 G(.)-.5 E F1(Put)144 669.6 Q F0 .37
+(routines return -1 on error \(setting)2.87 F F1(errno)2.87 E F0 .37
+(\), 0 on success, and 1 if the R_NOO).18 F(VER)-.5 E(WRITE)-.55 E F1<8d61>2.87
+E(g)-.1 E F0 -.1(wa)144 681.6 S 2.5(ss).1 G(et and the k)165.84 681.6 Q .3 -.15
+(ey a)-.1 H(lready e).15 E(xists in the \214le.)-.15 E(4.4 Berk)72 732 Q(ele)
+-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 89.875(ution September)-.2 F(13, 1993)
+2.5 E(2)535 732 Q EP
+%%Page: 3 3
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.01(DBOPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.01(anual DBOPEN\(3\))340.17 48 R 20.17(seq A)108 84 R .002
+(pointer to a routine which is the interf)2.502 F .002
+(ace for sequential retrie)-.1 F -.25(va)-.25 G 2.502(lf).25 G .002
+(rom the database.)416.694 84 R .001(The address)5.001 F .219
+(and length of the k)144 96 R .519 -.15(ey a)-.1 H .219
+(re returned in the structure referenced by).15 F/F1 10/Times-Italic@0 SF -.1
+(ke)2.72 G(y)-.2 E F0 2.72(,a).32 G .22(nd the address and length of)426.42 96
+R(the data are returned in the structure referenced by)144 108 Q F1(data)2.5 E
+F0(.).26 E .937(Sequential k)144 124.8 R -.15(ey)-.1 G .937(/data pair retrie)
+.15 F -.25(va)-.25 G 3.437(lm).25 G .936(ay be)289.748 124.8 R .936(gin at an)
+-.15 F 3.436(yt)-.15 G .936(ime, and the position of the `)359.292 124.8 R
+(`cursor')-.74 E 3.436('i)-.74 G 3.436(sn)519.894 124.8 S(ot)532.22 124.8 Q(af)
+144 136.8 Q 1.585(fected by calls to the)-.25 F F1(del)4.085 E F0(,).51 E F1
+-.1(ge)4.085 G(t).1 E F0(,).68 E F1(put)4.086 E F0 4.086(,o).68 G(r)308.452
+136.8 Q F1(sync)4.086 E F0 4.086(routines. Modi\214cations)4.086 F 1.586
+(to the database during a)4.086 F 1.404(sequential scan will be re\215ected in\
+ the scan, i.e. records inserted behind the cursor will not be)144 148.8 R
+(returned while records inserted in front of the cursor will be returned.)144
+160.8 Q(The \215ag v)144 177.6 Q(alue)-.25 E/F2 10/Times-Bold@0 SF(must)2.5 E
+F0(be set to one of the follo)2.5 E(wing v)-.25 E(alues:)-.25 E(R_CURSOR)144
+194.4 Q .523(The data associated with the speci\214ed k)180 206.4 R .824 -.15
+(ey i)-.1 H 3.024(sr).15 G 3.024(eturned. This)367.236 206.4 R(dif)3.024 E .524
+(fers from the)-.25 F F1 -.1(ge)3.024 G(t).1 E F0(routines)3.024 E 1.143
+(in that it sets or initializes the cursor to the location of the k)180 218.4 R
+1.443 -.15(ey a)-.1 H 3.642(sw).15 G 3.642(ell. \(Note,)464.924 218.4 R 1.142
+(for the)3.642 F 1.275(DB_BTREE access method, the returned k)180 230.4 R 1.575
+-.15(ey i)-.1 H 3.775(sn).15 G 1.276(ot necessarily an e)386.425 230.4 R 1.276
+(xact match for the)-.15 F .598(speci\214ed k)180 242.4 R -.15(ey)-.1 G 5.598
+(.T)-.5 G .598(he returned k)246.396 242.4 R .898 -.15(ey i)-.1 H 3.098(st).15
+G .598(he smallest k)325.188 242.4 R .898 -.15(ey g)-.1 H .598
+(reater than or equal to the speci\214ed).15 F -.1(ke)180 254.4 S 1.3 -.65
+(y, p)-.05 H(ermitting partial k).65 E .3 -.15(ey m)-.1 H
+(atches and range searches.\)).15 E(R_FIRST)144 271.2 Q 1.043(The \214rst k)180
+283.2 R -.15(ey)-.1 G 1.044(/data pair of the database is returned, and the cu\
+rsor is set or initialized to).15 F(reference it.)180 295.2 Q(R_LAST)144 312 Q
+.085(The last k)180 324 R -.15(ey)-.1 G .085(/data pair of the database is ret\
+urned, and the cursor is set or initialized to ref-).15 F(erence it.)180 336 Q
+(\(Applicable only to the DB_BTREE and DB_RECNO access methods.\))5 E(R_NEXT)
+144 352.8 Q(Retrie)180 364.8 Q .604 -.15(ve t)-.25 H .304(he k).15 F -.15(ey)
+-.1 G .304(/data pair immediately after the cursor).15 F 5.304(.I)-.55 G 2.804
+(ft)410.622 364.8 S .305(he cursor is not yet set, this is)419.536 364.8 R
+(the same as the R_FIRST \215ag.)180 376.8 Q(R_PREV)144 393.6 Q(Retrie)180
+405.6 Q .755 -.15(ve t)-.25 H .455(he k).15 F -.15(ey)-.1 G .455
+(/data pair immediately before the cursor).15 F 5.455(.I)-.55 G 2.955(ft)419.05
+405.6 S .454(he cursor is not yet set, this)428.115 405.6 R .62
+(is the same as the R_LAST \215ag.)180 417.6 R .621
+(\(Applicable only to the DB_BTREE and DB_RECNO)5.621 F(access methods.\))180
+429.6 Q .911(R_LAST and R_PREV are a)144 446.4 R -.25(va)-.2 G .911
+(ilable only for the DB_BTREE and DB_RECNO access methods).25 F(because the)144
+458.4 Q 2.5(ye)-.15 G(ach imply that the k)202.16 458.4 Q -.15(ey)-.1 G 2.5(sh)
+.15 G -2.25 -.2(av e)302.18 458.4 T(an inherent order which does not change.)
+2.7 E F1(Seq)144 475.2 Q F0 .061(routines return -1 on error \(setting)2.561 F
+F1(errno)2.561 E F0 .061(\), 0 on success and 1 if there are no k).18 F -.15
+(ey)-.1 G .061(/data pairs less).15 F .35
+(than or greater than the speci\214ed or current k)144 487.2 R -.15(ey)-.1 G
+5.349(.I)-.5 G 2.849(ft)346.467 487.2 S .349
+(he DB_RECNO access method is being used,)355.426 487.2 R .025
+(and if the database \214le is a character special \214le and no complete k)144
+499.2 R -.15(ey)-.1 G .025(/data pairs are currently a).15 F -.25(va)-.2 G(il-)
+.25 E(able, the)144 511.2 Q F1(seq)2.5 E F0(routines return 2.)2.5 E 15.17
+(sync A)108 528 R .458(pointer to a routine to \215ush an)2.958 F 2.957(yc)-.15
+G .457(ached information to disk.)289.72 528 R .457
+(If the database is in memory only)5.457 F(,)-.65 E(the)144 540 Q F1(sync)2.5 E
+F0(routine has no ef)2.5 E(fect and will al)-.25 E -.1(wa)-.1 G(ys succeed.).1
+E(The \215ag v)144 556.8 Q(alue may be set to the follo)-.25 E(wing v)-.25 E
+(alue:)-.25 E(R_RECNOSYNC)144 573.6 Q .077(If the DB_RECNO access method is be\
+ing used, this \215ag causes the sync routine to apply)180 585.6 R .75(to the \
+btree \214le which underlies the recno \214le, not the recno \214le itself.)180
+597.6 R .75(\(See the)5.75 F F1(bfname)3.25 E F0(\214eld of the)180 609.6 Q F1
+-.37(re)2.5 G(cno).37 E F0(\(3\) manual page for more information.\)).18 E F1
+(Sync)144 626.4 Q F0(routines return -1 on error \(setting)2.5 E F1(errno)2.5 E
+F0 2.5(\)a).18 G(nd 0 on success.)336.91 626.4 Q/F3 9/Times-Bold@0 SF(KEY/D)72
+643.2 Q -1.35 -.855(AT A)-.315 H -.666(PA)3.105 G(IRS).666 E F0 .134
+(Access to all \214le types is based on k)108 655.2 R -.15(ey)-.1 G .134
+(/data pairs.).15 F .134(Both k)5.134 F -.15(ey)-.1 G 2.634(sa).15 G .134
+(nd data are represented by the follo)359.078 655.2 R .135(wing data)-.25 F
+(structure:)108 667.2 Q(typedef struct {)108 684 Q(4.4 Berk)72 732 Q(ele)-.1 E
+2.5(yD)-.15 G(istrib)132.57 732 Q 89.875(ution September)-.2 F(13, 1993)2.5 E
+(3)535 732 Q EP
+%%Page: 4 4
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.01(DBOPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.01(anual DBOPEN\(3\))340.17 48 R -.2(vo)144 84 S(id *data;).2 E
+(size_t size;)144 96 Q 2.5(}D)108 108 S(BT)122.52 108 Q(;)-.55 E
+(The elements of the DBT structure are de\214ned as follo)108 124.8 Q(ws:)-.25
+E 16.84(data A)108 141.6 R(pointer to a byte string.)2.5 E 17.95(size The)108
+158.4 R(length of the byte string.)2.5 E -2.15 -.25(Ke y)108 175.2 T .829(and \
+data byte strings may reference strings of essentially unlimited length althou\
+gh an)3.579 F 3.328(yt)-.15 G 1.028 -.1(wo o)492.894 175.2 T 3.328(ft).1 G(hem)
+522.78 175.2 Q 1.133(must \214t into a)108 187.2 R -.25(va)-.2 G 1.134
+(ilable memory at the same time.).25 F 1.134
+(It should be noted that the access methods pro)6.134 F 1.134(vide no)-.15 F
+(guarantees about byte string alignment.)108 199.2 Q/F1 9/Times-Bold@0 SF(ERR)
+72 216 Q(ORS)-.27 E F0(The)108 228 Q/F2 10/Times-Italic@0 SF(dbopen)3.389 E F0
+.889(routine may f)3.389 F .889(ail and set)-.1 F F2(errno)3.388 E F0 .888
+(for an)3.388 F 3.388(yo)-.15 G 3.388(ft)324.376 228 S .888
+(he errors speci\214ed for the library routines)333.874 228 R F2(open)3.388 E
+F0(\(2\)).24 E(and)108 240 Q F2(malloc)2.5 E F0(\(3\) or the follo).31 E(wing:)
+-.25 E([EFTYPE])108 256.8 Q 2.5<418c>144 268.8 S(le is incorrectly formatted.)
+159.28 268.8 Q([EINV)108 285.6 Q(AL])-1.35 E 2.812(Ap)144 297.6 S .313(aramete\
+r has been speci\214ed \(hash function, pad byte etc.\) that is incompatible w\
+ith the current)159.032 297.6 R .406
+(\214le speci\214cation or which is not meaningful for the function \(for e)144
+309.6 R .405(xample, use of the cursor with-)-.15 F .099
+(out prior initialization\) or there is a mismatch between the v)144 321.6 R .1
+(ersion number of \214le and the softw)-.15 F(are.)-.1 E(The)108 338.4 Q F2
+(close)3.469 E F0 .969(routines may f)3.469 F .969(ail and set)-.1 F F2(errno)
+3.469 E F0 .969(for an)3.469 F 3.469(yo)-.15 G 3.469(ft)320.18 338.4 S .969
+(he errors speci\214ed for the library routines)329.759 338.4 R F2(close)3.468
+E F0(\(2\),).18 E F2 -.37(re)108 350.4 S(ad).37 E F0(\(2\),).77 E F2(write)2.5
+E F0(\(2\),).18 E F2(fr)2.5 E(ee)-.37 E F0(\(3\), or).18 E F2(fsync)2.5 E F0
+(\(2\).).31 E(The)108 367.2 Q F2(del)2.969 E F0(,).51 E F2 -.1(ge)2.969 G(t).1
+E F0(,).68 E F2(put)2.969 E F0(and)2.969 E F2(seq)2.969 E F0 .469
+(routines may f)2.969 F .469(ail and set)-.1 F F2(errno)2.97 E F0 .47(for an)
+2.97 F 2.97(yo)-.15 G 2.97(ft)377.59 367.2 S .47
+(he errors speci\214ed for the library rou-)386.67 367.2 R(tines)108 379.2 Q F2
+-.37(re)2.5 G(ad).37 E F0(\(2\),).77 E F2(write)2.5 E F0(\(2\),).18 E F2(fr)2.5
+E(ee)-.37 E F0(\(3\) or).18 E F2(malloc)2.5 E F0(\(3\).).31 E(The)108 396 Q F2
+(fd)2.5 E F0(routines will f)2.5 E(ail and set)-.1 E F2(errno)2.5 E F0
+(to ENOENT for in memory databases.)2.5 E(The)108 412.8 Q F2(sync)2.5 E F0
+(routines may f)2.5 E(ail and set)-.1 E F2(errno)2.5 E F0(for an)2.5 E 2.5(yo)
+-.15 G 2.5(ft)307.71 412.8 S(he errors speci\214ed for the library routine)
+316.32 412.8 Q F2(fsync)2.5 E F0(\(2\).).31 E F1(SEE ALSO)72 429.6 Q F2(btr)108
+441.6 Q(ee)-.37 E F0(\(3\),).18 E F2(hash)2.5 E F0(\(3\),).28 E F2(mpool)2.5 E
+F0(\(3\),).51 E F2 -.37(re)2.5 G(cno).37 E F0(\(3\)).18 E F2 .904(LIBTP: P)108
+465.6 R(ortable)-.8 E 3.404(,M)-.1 G .904(odular T)189.738 465.6 R -.15(ra)-.55
+G .904(nsactions for UNIX).15 F F0 3.404(,M).94 G(ar)328.884 465.6 Q .904
+(go Seltzer)-.18 F 3.403(,M)-.4 G .903(ichael Olson, USENIX proceedings,)
+392.041 465.6 R -.4(Wi)108 477.6 S(nter 1992.).4 E F1 -.09(BU)72 494.4 S(GS).09
+E F0 .399(The typedef DBT is a mnemonic for `)108 506.4 R .399
+(`data base thang')-.74 F .399(', and w)-.74 F .399
+(as used because noone could think of a rea-)-.1 F(sonable name that w)108
+518.4 Q(asn')-.1 E 2.5(ta)-.18 G(lready used.)216.03 518.4 Q
+(The \214le descriptor interf)108 535.2 Q
+(ace is a kluge and will be deleted in a future v)-.1 E(ersion of the interf)
+-.15 E(ace.)-.1 E(None of the access methods pro)108 552 Q(vide an)-.15 E 2.5
+(yf)-.15 G(orm of concurrent access, locking, or transactions.)275.16 552 Q
+(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 89.875
+(ution September)-.2 F(13, 1993)2.5 E(4)535 732 Q EP
+%%Trailer
+end
+%%EOF
diff --git a/src/plugins/kdb/db2/libdb2/docs/hash.3.ps b/src/plugins/kdb/db2/libdb2/docs/hash.3.ps
new file mode 100644
index 0000000000..18303cfb7c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/hash.3.ps
@@ -0,0 +1,292 @@
+%!PS-Adobe-3.0
+%%Creator: groff version 1.08
+%%DocumentNeededResources: font Times-Roman
+%%+ font Times-Bold
+%%+ font Times-Italic
+%%DocumentSuppliedResources: procset grops 1.08 0
+%%Pages: 2
+%%PageOrder: Ascend
+%%Orientation: Portrait
+%%EndComments
+%%BeginProlog
+%%BeginResource: procset grops 1.08 0
+/setpacking where{
+pop
+currentpacking
+true setpacking
+}if
+/grops 120 dict dup begin
+/SC 32 def
+/A/show load def
+/B{0 SC 3 -1 roll widthshow}bind def
+/C{0 exch ashow}bind def
+/D{0 exch 0 SC 5 2 roll awidthshow}bind def
+/E{0 rmoveto show}bind def
+/F{0 rmoveto 0 SC 3 -1 roll widthshow}bind def
+/G{0 rmoveto 0 exch ashow}bind def
+/H{0 rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/I{0 exch rmoveto show}bind def
+/J{0 exch rmoveto 0 SC 3 -1 roll widthshow}bind def
+/K{0 exch rmoveto 0 exch ashow}bind def
+/L{0 exch rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/M{rmoveto show}bind def
+/N{rmoveto 0 SC 3 -1 roll widthshow}bind def
+/O{rmoveto 0 exch ashow}bind def
+/P{rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/Q{moveto show}bind def
+/R{moveto 0 SC 3 -1 roll widthshow}bind def
+/S{moveto 0 exch ashow}bind def
+/T{moveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/SF{
+findfont exch
+[exch dup 0 exch 0 exch neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/MF{
+findfont
+[5 2 roll
+0 3 1 roll 
+neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/level0 0 def
+/RES 0 def
+/PL 0 def
+/LS 0 def
+/PLG{
+gsave newpath clippath pathbbox grestore
+exch pop add exch pop
+}bind def
+/BP{
+/level0 save def
+1 setlinecap
+1 setlinejoin
+72 RES div dup scale
+LS{
+90 rotate
+}{
+0 PL translate
+}ifelse
+1 -1 scale
+}bind def
+/EP{
+level0 restore
+showpage
+}bind def
+/DA{
+newpath arcn stroke
+}bind def
+/SN{
+transform
+.25 sub exch .25 sub exch
+round .25 add exch round .25 add exch
+itransform
+}bind def
+/DL{
+SN
+moveto
+SN
+lineto stroke
+}bind def
+/DC{
+newpath 0 360 arc closepath
+}bind def
+/TM matrix def
+/DE{
+TM currentmatrix pop
+translate scale newpath 0 0 .5 0 360 arc closepath
+TM setmatrix
+}bind def
+/RC/rcurveto load def
+/RL/rlineto load def
+/ST/stroke load def
+/MT/moveto load def
+/CL/closepath load def
+/FL{
+currentgray exch setgray fill setgray
+}bind def
+/BL/fill load def
+/LW/setlinewidth load def
+/RE{
+findfont
+dup maxlength 1 index/FontName known not{1 add}if dict begin
+{
+1 index/FID ne{def}{pop pop}ifelse
+}forall
+/Encoding exch def
+dup/FontName exch def
+currentdict end definefont pop
+}bind def
+/DEFS 0 def
+/EBEGIN{
+moveto
+DEFS begin
+}bind def
+/EEND/end load def
+/CNT 0 def
+/level1 0 def
+/PBEGIN{
+/level1 save def
+translate
+div 3 1 roll div exch scale
+neg exch neg exch translate
+0 setgray
+0 setlinecap
+1 setlinewidth
+0 setlinejoin
+10 setmiterlimit
+[]0 setdash
+/setstrokeadjust where{
+pop
+false setstrokeadjust
+}if
+/setoverprint where{
+pop
+false setoverprint
+}if
+newpath
+/CNT countdictstack def
+userdict begin
+/showpage{}def
+}bind def
+/PEND{
+clear
+countdictstack CNT sub{end}repeat
+level1 restore
+}bind def
+end def
+/setpacking where{
+pop
+setpacking
+}if
+%%EndResource
+%%IncludeResource: font Times-Roman
+%%IncludeResource: font Times-Bold
+%%IncludeResource: font Times-Italic
+grops begin/DEFS 1 dict def DEFS begin/u{.001 mul}bind def end/RES 72 def/PL
+792 def/LS false def/ENC0[/asciicircum/asciitilde/Scaron/Zcaron/scaron/zcaron
+/Ydieresis/trademark/quotesingle/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/space
+/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft
+/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four
+/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C
+/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash
+/bracketright/circumflex/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q
+/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/tilde/.notdef/quotesinglbase
+/guillemotleft/guillemotright/bullet/florin/fraction/perthousand/dagger
+/daggerdbl/endash/emdash/ff/fi/fl/ffi/ffl/dotlessi/dotlessj/grave/hungarumlaut
+/dotaccent/breve/caron/ring/ogonek/quotedblleft/quotedblright/oe/lslash
+/quotedblbase/OE/Lslash/.notdef/exclamdown/cent/sterling/currency/yen/brokenbar
+/section/dieresis/copyright/ordfeminine/guilsinglleft/logicalnot/minus
+/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu
+/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guilsinglright
+/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde
+/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
+/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis
+/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute
+/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve
+/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex
+/udieresis/yacute/thorn/ydieresis]def/Times-Italic@0 ENC0/Times-Italic RE
+/Times-Bold@0 ENC0/Times-Bold RE/Times-Roman@0 ENC0/Times-Roman RE
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 136.79(HASH\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 136.79(anual HASH\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72 84 S
+(ME).18 E F0(hash \255 hash database access method)108 96 Q F1(SYNOPSIS)72
+112.8 Q/F2 10/Times-Bold@0 SF(#include <sys/types.h>)108 124.8 Q(#include <db)
+108 136.8 Q(.h>)-.4 E F1(DESCRIPTION)72 153.6 Q F0 .29(The routine)108 165.6 R
+/F3 10/Times-Italic@0 SF(dbopen)2.79 E F0 .29(is the library interf)2.79 F .29
+(ace to database \214les.)-.1 F .29
+(One of the supported \214le formats is hash \214les.)5.29 F .974
+(The general description of the database access methods is in)108 177.6 R F3
+(dbopen)3.475 E F0 .975(\(3\), this manual page describes only).24 F
+(the hash speci\214c information.)108 189.6 Q(The hash data structure is an e)
+108 206.4 Q(xtensible, dynamic hashing scheme.)-.15 E .83
+(The access method speci\214c data structure pro)108 223.2 R .83(vided to)-.15
+F F3(dbopen)3.33 E F0 .83(is de\214ned in the <db)3.33 F .83
+(.h> include \214le as fol-)-.4 F(lo)108 235.2 Q(ws:)-.25 E(typedef struct {)
+108 259.2 Q(int bsize;)144 271.2 Q(int cachesize;)144 283.2 Q(int f)144 295.2 Q
+-.1(fa)-.25 G(ctor;).1 E(u_long \(*hash\)\(const v)144 307.2 Q
+(oid *, size_t\);)-.2 E(int lorder;)144 319.2 Q(int nelem;)144 331.2 Q 2.5(}H)
+108 343.2 S(ASHINFO;)122.52 343.2 Q
+(The elements of this structure are as follo)108 360 Q(ws:)-.25 E(bsize)108
+376.8 Q F3(Bsize)144 376.8 Q F0 1.393(de\214nes the hash table b)3.893 F(uck)
+-.2 E 1.393(et size, and is, by def)-.1 F 1.394(ault, 256 bytes.)-.1 F 1.394
+(It may be preferable to)6.394 F
+(increase the page size for disk-resident tables and tables with lar)144 388.8
+Q(ge data items.)-.18 E(cachesize)108 405.6 Q 3.16(As)144 417.6 S .66
+(uggested maximum size, in bytes, of the memory cache.)158.27 417.6 R .659
+(This v)5.659 F .659(alue is)-.25 F F2(only)3.159 E F0(advisory)3.159 E 3.159
+(,a)-.65 G .659(nd the)514.621 417.6 R
+(access method will allocate more memory rather than f)144 429.6 Q(ail.)-.1 E
+-2.1 -.25(ff a)108 446.4 T(ctor).25 E F3(Ffactor)9.7 E F0 .482
+(indicates a desired density within the hash table.)2.981 F .482
+(It is an approximation of the number of)5.482 F -.1(ke)144 458.4 S .429
+(ys allo)-.05 F .429(wed to accumulate in an)-.25 F 2.929(yo)-.15 G .429(ne b)
+291.454 458.4 R(uck)-.2 E .429(et, determining when the hash table gro)-.1 F
+.428(ws or shrinks.)-.25 F(The def)144 470.4 Q(ault v)-.1 E(alue is 8.)-.25 E
+(hash)108 487.2 Q F3(Hash)144 487.2 Q F0 .1(is a user de\214ned hash function.)
+2.6 F .1(Since no hash function performs equally well on all possible)5.1 F
+.924(data, the user may \214nd that the b)144 499.2 R .923
+(uilt-in hash function does poorly on a particular data set.)-.2 F(User)5.923 E
+1.408(speci\214ed hash functions must tak)144 511.2 R 3.909(et)-.1 G 1.609 -.1
+(wo a)293.431 511.2 T -.18(rg).1 G 1.409
+(uments \(a pointer to a byte string and a length\) and).18 F
+(return an u_long to be used as the hash v)144 523.2 Q(alue.)-.25 E 9.62
+(lorder The)108 540 R 1.597(byte order for inte)4.097 F 1.596
+(gers in the stored database metadata.)-.15 F 1.596
+(The number should represent the)6.596 F .688(order as an inte)144 552 R .689
+(ger; for e)-.15 F .689(xample, big endian order w)-.15 F .689
+(ould be the number 4,321.)-.1 F(If)5.689 E F3(lor)3.189 E(der)-.37 E F0 .689
+(is 0 \(no)3.189 F .822(order is speci\214ed\) the current host order is used.)
+144 564 R .822(If the)5.822 F .822(\214le already e)5.822 F .821
+(xists, the speci\214ed v)-.15 F .821(alue is)-.25 F(ignored and the v)144 576
+Q(alue speci\214ed when the tree w)-.25 E(as created is used.)-.1 E(nelem)108
+592.8 Q F3(Nelem)144 592.8 Q F0 .701
+(is an estimate of the \214nal size of the hash table.)3.2 F .701
+(If not set or set too lo)5.701 F 2.001 -.65(w, h)-.25 H .701(ash tables will)
+.65 F -.15(ex)144 604.8 S .448(pand gracefully as k).15 F -.15(ey)-.1 G 2.948
+(sa).15 G .448(re entered, although a slight performance de)255.912 604.8 R
+.447(gradation may be noticed.)-.15 F(The def)144 616.8 Q(ault v)-.1 E
+(alue is 1.)-.25 E .79(If the \214le already e)108 633.6 R .79
+(xists \(and the O_TR)-.15 F .79(UNC \215ag is not speci\214ed\), the v)-.4 F
+.79(alues speci\214ed for the parameters)-.25 F(bsize, f)108 645.6 Q -.1(fa)
+-.25 G(ctor).1 E 2.5(,l)-.4 G(order and nelem are ignored and the v)167.23
+645.6 Q(alues speci\214ed when the tree w)-.25 E(as created are used.)-.1 E
+1.232(If a hash function is speci\214ed,)108 662.4 R F3(hash_open)3.731 E F0
+1.231(will attempt to determine if the hash function speci\214ed is the)3.731 F
+(same as the one with which the database w)108 674.4 Q(as created, and will f)
+-.1 E(ail if it is not.)-.1 E(Backw)108 691.2 Q .861(ard compatible interf)-.1
+F .861(aces to the routines described in)-.1 F F3(dbm)3.362 E F0 .862
+(\(3\), and).32 F F3(ndbm)3.362 E F0 .862(\(3\) are pro).32 F .862(vided, ho)
+-.15 F(we)-.25 E -.15(ve)-.25 G -.4(r,).15 G(4.4 Berk)72 732 Q(ele)-.1 E 2.5
+(yD)-.15 G(istrib)132.57 732 Q 96.815(ution August)-.2 F(17, 1993)2.5 E(1)535
+732 Q EP
+%%Page: 2 2
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 136.79(HASH\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 136.79(anual HASH\(3\))340.17 48 R(these interf)108 84 Q
+(aces are not compatible with pre)-.1 E(vious \214le formats.)-.25 E/F1 9
+/Times-Bold@0 SF(SEE ALSO)72 100.8 Q/F2 10/Times-Italic@0 SF(btr)108 112.8 Q
+(ee)-.37 E F0(\(3\),).18 E F2(dbopen)2.5 E F0(\(3\),).24 E F2(mpool)2.5 E F0
+(\(3\),).51 E F2 -.37(re)2.5 G(cno).37 E F0(\(3\)).18 E F2(Dynamic Hash T)108
+136.8 Q(ables)-.92 E F0 2.5(,P).27 G(er)206.79 136.8 Q(-Ak)-.2 E 2.5(eL)-.1 G
+(arson, Communications of the A)242.86 136.8 Q(CM, April 1988.)-.4 E F2 2.5(AN)
+108 160.8 S .3 -.15(ew H)123.28 160.8 T(ash P).15 E(ac)-.8 E(ka)-.2 E .2 -.1
+(ge f)-.1 H(or UNIX).1 E F0 2.5(,M).94 G(ar)248.41 160.8 Q(go Seltzer)-.18 E
+2.5(,U)-.4 G(SENIX Proceedings, W)308.09 160.8 Q(inter 1991.)-.4 E F1 -.09(BU)
+72 177.6 S(GS).09 E F0(Only big and little endian byte order is supported.)108
+189.6 Q(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 96.815
+(ution August)-.2 F(17, 1993)2.5 E(2)535 732 Q EP
+%%Trailer
+end
+%%EOF
diff --git a/src/plugins/kdb/db2/libdb2/docs/hash.usenix.ps b/src/plugins/kdb/db2/libdb2/docs/hash.usenix.ps
new file mode 100644
index 0000000000..acdea09926
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/hash.usenix.ps
@@ -0,0 +1,12209 @@
+%!PS-Adobe-1.0
+%%Creator: utopia:margo (& Seltzer,608-13E,8072,)
+%%Title: stdin (ditroff)
+%%CreationDate: Tue Dec 11 15:06:45 1990
+%%EndComments
+%	@(#)psdit.pro	1.3 4/15/88
+% lib/psdit.pro -- prolog for psdit (ditroff) files
+% Copyright (c) 1984, 1985 Adobe Systems Incorporated. All Rights Reserved.
+% last edit: shore Sat Nov 23 20:28:03 1985
+% RCSID: $Header$
+
+% Changed by Edward Wang (edward@ucbarpa.berkeley.edu) to handle graphics,
+% 17 Feb, 87.
+
+/$DITroff 140 dict def $DITroff begin
+/fontnum 1 def /fontsize 10 def /fontheight 10 def /fontslant 0 def
+/xi{0 72 11 mul translate 72 resolution div dup neg scale 0 0 moveto
+ /fontnum 1 def /fontsize 10 def /fontheight 10 def /fontslant 0 def F
+ /pagesave save def}def
+/PB{save /psv exch def currentpoint translate 
+ resolution 72 div dup neg scale 0 0 moveto}def
+/PE{psv restore}def
+/arctoobig 90 def /arctoosmall .05 def
+/m1 matrix def /m2 matrix def /m3 matrix def /oldmat matrix def
+/tan{dup sin exch cos div}def
+/point{resolution 72 div mul}def
+/dround	{transform round exch round exch itransform}def
+/xT{/devname exch def}def
+/xr{/mh exch def /my exch def /resolution exch def}def
+/xp{}def
+/xs{docsave restore end}def
+/xt{}def
+/xf{/fontname exch def /slotno exch def fontnames slotno get fontname eq not
+ {fonts slotno fontname findfont put fontnames slotno fontname put}if}def
+/xH{/fontheight exch def F}def
+/xS{/fontslant exch def F}def
+/s{/fontsize exch def /fontheight fontsize def F}def
+/f{/fontnum exch def F}def
+/F{fontheight 0 le{/fontheight fontsize def}if
+ fonts fontnum get fontsize point 0 0 fontheight point neg 0 0 m1 astore
+ fontslant 0 ne{1 0 fontslant tan 1 0 0 m2 astore m3 concatmatrix}if
+ makefont setfont .04 fontsize point mul 0 dround pop setlinewidth}def
+/X{exch currentpoint exch pop moveto show}def
+/N{3 1 roll moveto show}def
+/Y{exch currentpoint pop exch moveto show}def
+/S{show}def
+/ditpush{}def/ditpop{}def
+/AX{3 -1 roll currentpoint exch pop moveto 0 exch ashow}def
+/AN{4 2 roll moveto 0 exch ashow}def
+/AY{3 -1 roll currentpoint pop exch moveto 0 exch ashow}def
+/AS{0 exch ashow}def
+/MX{currentpoint exch pop moveto}def
+/MY{currentpoint pop exch moveto}def
+/MXY{moveto}def
+/cb{pop}def	% action on unknown char -- nothing for now
+/n{}def/w{}def
+/p{pop showpage pagesave restore /pagesave save def}def
+/Dt{/Dlinewidth exch def}def 1 Dt
+/Ds{/Ddash exch def}def -1 Ds
+/Di{/Dstipple exch def}def 1 Di
+/Dsetlinewidth{2 Dlinewidth mul setlinewidth}def
+/Dsetdash{Ddash 4 eq{[8 12]}{Ddash 16 eq{[32 36]}
+ {Ddash 20 eq{[32 12 8 12]}{[]}ifelse}ifelse}ifelse 0 setdash}def
+/Dstroke{gsave Dsetlinewidth Dsetdash 1 setlinecap stroke grestore
+ currentpoint newpath moveto}def
+/Dl{rlineto Dstroke}def
+/arcellipse{/diamv exch def /diamh exch def oldmat currentmatrix pop
+ currentpoint translate 1 diamv diamh div scale /rad diamh 2 div def
+ currentpoint exch rad add exch rad -180 180 arc oldmat setmatrix}def
+/Dc{dup arcellipse Dstroke}def
+/De{arcellipse Dstroke}def
+/Da{/endv exch def /endh exch def /centerv exch def /centerh exch def
+ /cradius centerv centerv mul centerh centerh mul add sqrt def
+ /eradius endv endv mul endh endh mul add sqrt def
+ /endang endv endh atan def
+ /startang centerv neg centerh neg atan def
+ /sweep startang endang sub dup 0 lt{360 add}if def
+ sweep arctoobig gt
+ {/midang startang sweep 2 div sub def /midrad cradius eradius add 2 div def
+  /midh midang cos midrad mul def /midv midang sin midrad mul def
+  midh neg midv neg endh endv centerh centerv midh midv Da
+  Da}
+ {sweep arctoosmall ge
+  {/controldelt 1 sweep 2 div cos sub 3 sweep 2 div sin mul div 4 mul def
+   centerv neg controldelt mul centerh controldelt mul
+   endv neg controldelt mul centerh add endh add
+   endh controldelt mul centerv add endv add
+   centerh endh add centerv endv add rcurveto Dstroke}
+  {centerh endh add centerv endv add rlineto Dstroke}
+  ifelse}
+ ifelse}def
+/Dpatterns[
+[%cf[widthbits]
+[8<0000000000000010>]
+[8<0411040040114000>]
+[8<0204081020408001>]
+[8<0000103810000000>]
+[8<6699996666999966>]
+[8<0000800100001008>]
+[8<81c36666c3810000>]
+[8<0f0e0c0800000000>]
+[8<0000000000000010>]
+[8<0411040040114000>]
+[8<0204081020408001>]
+[8<0000001038100000>]
+[8<6699996666999966>]
+[8<0000800100001008>]
+[8<81c36666c3810000>]
+[8<0f0e0c0800000000>]
+[8<0042660000246600>]
+[8<0000990000990000>]
+[8<0804020180402010>]
+[8<2418814242811824>]
+[8<6699996666999966>]
+[8<8000000008000000>]
+[8<00001c3e363e1c00>]
+[8<0000000000000000>]
+[32<00000040000000c00000004000000040000000e0000000000000000000000000>]
+[32<00000000000060000000900000002000000040000000f0000000000000000000>]
+[32<000000000000000000e0000000100000006000000010000000e0000000000000>]
+[32<00000000000000002000000060000000a0000000f00000002000000000000000>]
+[32<0000000e0000000000000000000000000000000f000000080000000e00000001>]
+[32<0000090000000600000000000000000000000000000007000000080000000e00>]
+[32<00010000000200000004000000040000000000000000000000000000000f0000>]
+[32<0900000006000000090000000600000000000000000000000000000006000000>]]
+[%ug
+[8<0000020000000000>]
+[8<0000020000002000>]
+[8<0004020000002000>]
+[8<0004020000402000>]
+[8<0004060000402000>]
+[8<0004060000406000>]
+[8<0006060000406000>]
+[8<0006060000606000>]
+[8<00060e0000606000>]
+[8<00060e000060e000>]
+[8<00070e000060e000>]
+[8<00070e000070e000>]
+[8<00070e020070e000>]
+[8<00070e020070e020>]
+[8<04070e020070e020>]
+[8<04070e024070e020>]
+[8<04070e064070e020>]
+[8<04070e064070e060>]
+[8<06070e064070e060>]
+[8<06070e066070e060>]
+[8<06070f066070e060>]
+[8<06070f066070f060>]
+[8<060f0f066070f060>]
+[8<060f0f0660f0f060>]
+[8<060f0f0760f0f060>]
+[8<060f0f0760f0f070>]
+[8<0e0f0f0760f0f070>]
+[8<0e0f0f07e0f0f070>]
+[8<0e0f0f0fe0f0f070>]
+[8<0e0f0f0fe0f0f0f0>]
+[8<0f0f0f0fe0f0f0f0>]
+[8<0f0f0f0ff0f0f0f0>]
+[8<1f0f0f0ff0f0f0f0>]
+[8<1f0f0f0ff1f0f0f0>]
+[8<1f0f0f8ff1f0f0f0>]
+[8<1f0f0f8ff1f0f0f8>]
+[8<9f0f0f8ff1f0f0f8>]
+[8<9f0f0f8ff9f0f0f8>]
+[8<9f0f0f9ff9f0f0f8>]
+[8<9f0f0f9ff9f0f0f9>]
+[8<9f8f0f9ff9f0f0f9>]
+[8<9f8f0f9ff9f8f0f9>]
+[8<9f8f1f9ff9f8f0f9>]
+[8<9f8f1f9ff9f8f1f9>]
+[8<bf8f1f9ff9f8f1f9>]
+[8<bf8f1f9ffbf8f1f9>]
+[8<bf8f1fdffbf8f1f9>]
+[8<bf8f1fdffbf8f1fd>]
+[8<ff8f1fdffbf8f1fd>]
+[8<ff8f1fdffff8f1fd>]
+[8<ff8f1ffffff8f1fd>]
+[8<ff8f1ffffff8f1ff>]
+[8<ff9f1ffffff8f1ff>]
+[8<ff9f1ffffff9f1ff>]
+[8<ff9f9ffffff9f1ff>]
+[8<ff9f9ffffff9f9ff>]
+[8<ffbf9ffffff9f9ff>]
+[8<ffbf9ffffffbf9ff>]
+[8<ffbfdffffffbf9ff>]
+[8<ffbfdffffffbfdff>]
+[8<ffffdffffffbfdff>]
+[8<ffffdffffffffdff>]
+[8<fffffffffffffdff>]
+[8<ffffffffffffffff>]]
+[%mg
+[8<8000000000000000>]
+[8<0822080080228000>]
+[8<0204081020408001>]
+[8<40e0400000000000>]
+[8<66999966>]
+[8<8001000010080000>]
+[8<81c36666c3810000>]
+[8<f0e0c08000000000>]
+[16<07c00f801f003e007c00f800f001e003c007800f001f003e007c00f801f003e0>]
+[16<1f000f8007c003e001f000f8007c003e001f800fc007e003f001f8007c003e00>]
+[8<c3c300000000c3c3>]
+[16<0040008001000200040008001000200040008000000100020004000800100020>]
+[16<0040002000100008000400020001800040002000100008000400020001000080>]
+[16<1fc03fe07df0f8f8f07de03fc01f800fc01fe03ff07df8f87df03fe01fc00f80>]
+[8<80>]
+[8<8040201000000000>]
+[8<84cc000048cc0000>]
+[8<9900009900000000>]
+[8<08040201804020100800020180002010>]
+[8<2418814242811824>]
+[8<66999966>]
+[8<8000000008000000>]
+[8<70f8d8f870000000>]
+[8<0814224180402010>]
+[8<aa00440a11a04400>]
+[8<018245aa45820100>]
+[8<221c224180808041>]
+[8<88000000>]
+[8<0855800080550800>]
+[8<2844004482440044>]
+[8<0810204080412214>]
+[8<00>]]]def
+/Dfill{
+ transform /maxy exch def /maxx exch def
+ transform /miny exch def /minx exch def
+ minx maxx gt{/minx maxx /maxx minx def def}if
+ miny maxy gt{/miny maxy /maxy miny def def}if
+ Dpatterns Dstipple 1 sub get exch 1 sub get
+ aload pop /stip exch def /stipw exch def /stiph 128 def
+ /imatrix[stipw 0 0 stiph 0 0]def
+ /tmatrix[stipw 0 0 stiph 0 0]def
+ /minx minx cvi stiph idiv stiph mul def
+ /miny miny cvi stipw idiv stipw mul def
+ gsave eoclip 0 setgray
+ miny stiph maxy{
+  tmatrix exch 5 exch put
+  minx stipw maxx{
+   tmatrix exch 4 exch put tmatrix setmatrix
+   stipw stiph true imatrix {stip} imagemask
+  }for
+ }for
+ grestore
+}def
+/Dp{Dfill Dstroke}def
+/DP{Dfill currentpoint newpath moveto}def
+end
+
+/ditstart{$DITroff begin
+ /nfonts 60 def			% NFONTS makedev/ditroff dependent!
+ /fonts[nfonts{0}repeat]def
+ /fontnames[nfonts{()}repeat]def
+/docsave save def
+}def
+
+% character outcalls
+/oc{
+ /pswid exch def /cc exch def /name exch def
+ /ditwid pswid fontsize mul resolution mul 72000 div def
+ /ditsiz fontsize resolution mul 72 div def
+ ocprocs name known{ocprocs name get exec}{name cb}ifelse
+}def
+/fractm [.65 0 0 .6 0 0] def
+/fraction{
+ /fden exch def /fnum exch def gsave /cf currentfont def
+ cf fractm makefont setfont 0 .3 dm 2 copy neg rmoveto
+ fnum show rmoveto currentfont cf setfont(\244)show setfont fden show 
+ grestore ditwid 0 rmoveto
+}def
+/oce{grestore ditwid 0 rmoveto}def
+/dm{ditsiz mul}def
+/ocprocs 50 dict def ocprocs begin
+(14){(1)(4)fraction}def
+(12){(1)(2)fraction}def
+(34){(3)(4)fraction}def
+(13){(1)(3)fraction}def
+(23){(2)(3)fraction}def
+(18){(1)(8)fraction}def
+(38){(3)(8)fraction}def
+(58){(5)(8)fraction}def
+(78){(7)(8)fraction}def
+(sr){gsave 0 .06 dm rmoveto(\326)show oce}def
+(is){gsave 0 .15 dm rmoveto(\362)show oce}def
+(->){gsave 0 .02 dm rmoveto(\256)show oce}def
+(<-){gsave 0 .02 dm rmoveto(\254)show oce}def
+(==){gsave 0 .05 dm rmoveto(\272)show oce}def
+(uc){gsave currentpoint 400 .009 dm mul add translate
+     8 -8 scale ucseal oce}def
+end
+
+% an attempt at a PostScript FONT to implement ditroff special chars
+% this will enable us to 
+%	cache the little buggers
+%	generate faster, more compact PS out of psdit
+%	confuse everyone (including myself)!
+50 dict dup begin
+/FontType 3 def
+/FontName /DIThacks def
+/FontMatrix [.001 0 0 .001 0 0] def
+/FontBBox [-260 -260 900 900] def% a lie but ...
+/Encoding 256 array def
+0 1 255{Encoding exch /.notdef put}for
+Encoding
+ dup 8#040/space put %space
+ dup 8#110/rc put %right ceil
+ dup 8#111/lt put %left  top curl
+ dup 8#112/bv put %bold vert
+ dup 8#113/lk put %left  mid curl
+ dup 8#114/lb put %left  bot curl
+ dup 8#115/rt put %right top curl
+ dup 8#116/rk put %right mid curl
+ dup 8#117/rb put %right bot curl
+ dup 8#120/rf put %right floor
+ dup 8#121/lf put %left  floor
+ dup 8#122/lc put %left  ceil
+ dup 8#140/sq put %square
+ dup 8#141/bx put %box
+ dup 8#142/ci put %circle
+ dup 8#143/br put %box rule
+ dup 8#144/rn put %root extender
+ dup 8#145/vr put %vertical rule
+ dup 8#146/ob put %outline bullet
+ dup 8#147/bu put %bullet
+ dup 8#150/ru put %rule
+ dup 8#151/ul put %underline
+ pop
+/DITfd 100 dict def
+/BuildChar{0 begin
+ /cc exch def /fd exch def
+ /charname fd /Encoding get cc get def
+ /charwid fd /Metrics get charname get def
+ /charproc fd /CharProcs get charname get def
+ charwid 0 fd /FontBBox get aload pop setcachedevice
+ 2 setlinejoin 40 setlinewidth
+ newpath 0 0 moveto gsave charproc grestore
+ end}def
+/BuildChar load 0 DITfd put
+/CharProcs 50 dict def
+CharProcs begin
+/space{}def
+/.notdef{}def
+/ru{500 0 rls}def
+/rn{0 840 moveto 500 0 rls}def
+/vr{0 800 moveto 0 -770 rls}def
+/bv{0 800 moveto 0 -1000 rls}def
+/br{0 840 moveto 0 -1000 rls}def
+/ul{0 -140 moveto 500 0 rls}def
+/ob{200 250 rmoveto currentpoint newpath 200 0 360 arc closepath stroke}def
+/bu{200 250 rmoveto currentpoint newpath 200 0 360 arc closepath fill}def
+/sq{80 0 rmoveto currentpoint dround newpath moveto
+    640 0 rlineto 0 640 rlineto -640 0 rlineto closepath stroke}def
+/bx{80 0 rmoveto currentpoint dround newpath moveto
+    640 0 rlineto 0 640 rlineto -640 0 rlineto closepath fill}def
+/ci{500 360 rmoveto currentpoint newpath 333 0 360 arc
+    50 setlinewidth stroke}def
+
+/lt{0 -200 moveto 0 550 rlineto currx 800 2cx s4 add exch s4 a4p stroke}def
+/lb{0 800 moveto 0 -550 rlineto currx -200 2cx s4 add exch s4 a4p stroke}def
+/rt{0 -200 moveto 0 550 rlineto currx 800 2cx s4 sub exch s4 a4p stroke}def
+/rb{0 800 moveto 0 -500 rlineto currx -200 2cx s4 sub exch s4 a4p stroke}def
+/lk{0 800 moveto 0 300 -300 300 s4 arcto pop pop 1000 sub
+    0 300 4 2 roll s4 a4p 0 -200 lineto stroke}def
+/rk{0 800 moveto 0 300 s2 300 s4 arcto pop pop 1000 sub
+    0 300 4 2 roll s4 a4p 0 -200 lineto stroke}def
+/lf{0 800 moveto 0 -1000 rlineto s4 0 rls}def
+/rf{0 800 moveto 0 -1000 rlineto s4 neg 0 rls}def
+/lc{0 -200 moveto 0 1000 rlineto s4 0 rls}def
+/rc{0 -200 moveto 0 1000 rlineto s4 neg 0 rls}def
+end
+
+/Metrics 50 dict def Metrics begin
+/.notdef 0 def
+/space 500 def
+/ru 500 def
+/br 0 def
+/lt 416 def
+/lb 416 def
+/rt 416 def
+/rb 416 def
+/lk 416 def
+/rk 416 def
+/rc 416 def
+/lc 416 def
+/rf 416 def
+/lf 416 def
+/bv 416 def
+/ob 350 def
+/bu 350 def
+/ci 750 def
+/bx 750 def
+/sq 750 def
+/rn 500 def
+/ul 500 def
+/vr 0 def
+end
+
+DITfd begin
+/s2 500 def /s4 250 def /s3 333 def
+/a4p{arcto pop pop pop pop}def
+/2cx{2 copy exch}def
+/rls{rlineto stroke}def
+/currx{currentpoint pop}def
+/dround{transform round exch round exch itransform} def
+end
+end
+/DIThacks exch definefont pop
+ditstart
+(psc)xT
+576 1 1 xr
+1(Times-Roman)xf 1 f
+2(Times-Italic)xf 2 f
+3(Times-Bold)xf 3 f
+4(Times-BoldItalic)xf 4 f
+5(Helvetica)xf 5 f
+6(Helvetica-Bold)xf 6 f
+7(Courier)xf 7 f
+8(Courier-Bold)xf 8 f
+9(Symbol)xf 9 f
+10(DIThacks)xf 10 f
+10 s
+1 f
+xi
+%%EndProlog
+
+%%Page: 1 1
+10 s 10 xH 0 xS 1 f
+3 f
+22 s
+1249 626(A)N
+1420(N)X
+1547(ew)X
+1796(H)X
+1933(ashing)X
+2467(P)X
+2574(ackage)X
+3136(for)X
+3405(U)X
+3532(N)X
+3659(IX)X
+2 f
+20 s
+3855 562(1)N
+1 f
+12 s
+1607 779(Margo)N
+1887(Seltzer)X
+9 f
+2179(-)X
+1 f
+2256(University)X
+2686(of)X
+2790(California,)X
+3229(Berkeley)X
+2015 875(Ozan)N
+2242(Yigit)X
+9 f
+2464(-)X
+1 f
+2541(York)X
+2762(University)X
+3 f
+2331 1086(ABSTRACT)N
+1 f
+10 s
+1152 1222(UNIX)N
+1385(support)X
+1657(of)X
+1756(disk)X
+1921(oriented)X
+2216(hashing)X
+2497(was)X
+2654(originally)X
+2997(provided)X
+3314(by)X
+2 f
+3426(dbm)X
+1 f
+3595([ATT79])X
+3916(and)X
+1152 1310(subsequently)N
+1595(improved)X
+1927(upon)X
+2112(in)X
+2 f
+2199(ndbm)X
+1 f
+2402([BSD86].)X
+2735(In)X
+2826(AT&T)X
+3068(System)X
+3327(V,)X
+3429(in-memory)X
+3809(hashed)X
+1152 1398(storage)N
+1420(and)X
+1572(access)X
+1814(support)X
+2090(was)X
+2251(added)X
+2479(in)X
+2577(the)X
+2 f
+2711(hsearch)X
+1 f
+3000(library)X
+3249(routines)X
+3542([ATT85].)X
+3907(The)X
+1152 1486(result)N
+1367(is)X
+1457(a)X
+1530(system)X
+1789(with)X
+1968(two)X
+2125(incompatible)X
+2580(hashing)X
+2865(schemes,)X
+3193(each)X
+3377(with)X
+3555(its)X
+3666(own)X
+3840(set)X
+3965(of)X
+1152 1574(shortcomings.)N
+1152 1688(This)N
+1316(paper)X
+1517(presents)X
+1802(the)X
+1922(design)X
+2152(and)X
+2289(performance)X
+2717(characteristics)X
+3198(of)X
+3286(a)X
+3343(new)X
+3498(hashing)X
+3768(package)X
+1152 1776(providing)N
+1483(a)X
+1539(superset)X
+1822(of)X
+1909(the)X
+2027(functionality)X
+2456(provided)X
+2761(by)X
+2 f
+2861(dbm)X
+1 f
+3019(and)X
+2 f
+3155(hsearch)X
+1 f
+3409(.)X
+3469(The)X
+3614(new)X
+3768(package)X
+1152 1864(uses)N
+1322(linear)X
+1537(hashing)X
+1818(to)X
+1912(provide)X
+2189(ef\256cient)X
+2484(support)X
+2755(of)X
+2853(both)X
+3026(memory)X
+3324(based)X
+3538(and)X
+3685(disk)X
+3849(based)X
+1152 1952(hash)N
+1319(tables)X
+1526(with)X
+1688(performance)X
+2115(superior)X
+2398(to)X
+2480(both)X
+2 f
+2642(dbm)X
+1 f
+2800(and)X
+2 f
+2936(hsearch)X
+1 f
+3210(under)X
+3413(most)X
+3588(conditions.)X
+3 f
+1380 2128(Introduction)N
+1 f
+892 2260(Current)N
+1196(UNIX)X
+1456(systems)X
+1768(offer)X
+1984(two)X
+2163(forms)X
+2409(of)X
+720 2348(hashed)N
+973(data)X
+1137(access.)X
+2 f
+1413(Dbm)X
+1 f
+1599(and)X
+1745(its)X
+1850(derivatives)X
+2231(provide)X
+720 2436(keyed)N
+939(access)X
+1171(to)X
+1259(disk)X
+1418(resident)X
+1698(data)X
+1858(while)X
+2 f
+2062(hsearch)X
+1 f
+2342(pro-)X
+720 2524(vides)N
+929(access)X
+1175(for)X
+1309(memory)X
+1616(resident)X
+1910(data.)X
+2124(These)X
+2356(two)X
+720 2612(access)N
+979(methods)X
+1302(are)X
+1453(incompatible)X
+1923(in)X
+2037(that)X
+2209(memory)X
+720 2700(resident)N
+1011(hash)X
+1195(tables)X
+1419(may)X
+1593(not)X
+1731(be)X
+1843(stored)X
+2075(on)X
+2191(disk)X
+2360(and)X
+720 2788(disk)N
+884(resident)X
+1169(tables)X
+1387(cannot)X
+1632(be)X
+1739(read)X
+1909(into)X
+2063(memory)X
+2360(and)X
+720 2876(accessed)N
+1022(using)X
+1215(the)X
+1333(in-memory)X
+1709(routines.)X
+2 f
+892 2990(Dbm)N
+1 f
+1091(has)X
+1241(several)X
+1512(shortcomings.)X
+2026(Since)X
+2247(data)X
+2423(is)X
+720 3078(assumed)N
+1032(to)X
+1130(be)X
+1242(disk)X
+1411(resident,)X
+1721(each)X
+1905(access)X
+2146(requires)X
+2440(a)X
+720 3166(system)N
+963(call,)X
+1120(and)X
+1257(almost)X
+1491(certainly,)X
+1813(a)X
+1869(disk)X
+2022(operation.)X
+2365(For)X
+720 3254(extremely)N
+1072(large)X
+1264(databases,)X
+1623(where)X
+1851(caching)X
+2131(is)X
+2214(unlikely)X
+720 3342(to)N
+810(be)X
+914(effective,)X
+1244(this)X
+1386(is)X
+1466(acceptable,)X
+1853(however,)X
+2177(when)X
+2378(the)X
+720 3430(database)N
+1022(is)X
+1100(small)X
+1298(\(i.e.)X
+1447(the)X
+1569(password)X
+1896(\256le\),)X
+2069(performance)X
+720 3518(improvements)N
+1204(can)X
+1342(be)X
+1443(obtained)X
+1744(through)X
+2018(caching)X
+2293(pages)X
+720 3606(of)N
+818(the)X
+947(database)X
+1255(in)X
+1348(memory.)X
+1685(In)X
+1782(addition,)X
+2 f
+2094(dbm)X
+1 f
+2262(cannot)X
+720 3694(store)N
+902(data)X
+1062(items)X
+1261(whose)X
+1492(total)X
+1660(key)X
+1802(and)X
+1943(data)X
+2102(size)X
+2252(exceed)X
+720 3782(the)N
+850(page)X
+1034(size)X
+1191(of)X
+1290(the)X
+1420(hash)X
+1599(table.)X
+1827(Similarly,)X
+2176(if)X
+2257(two)X
+2409(or)X
+720 3870(more)N
+907(keys)X
+1076(produce)X
+1357(the)X
+1477(same)X
+1664(hash)X
+1833(value)X
+2029(and)X
+2166(their)X
+2334(total)X
+720 3958(size)N
+876(exceeds)X
+1162(the)X
+1291(page)X
+1474(size,)X
+1650(the)X
+1779(table)X
+1966(cannot)X
+2210(store)X
+2396(all)X
+720 4046(the)N
+838(colliding)X
+1142(keys.)X
+892 4160(The)N
+1050(in-memory)X
+2 f
+1439(hsearch)X
+1 f
+1725(routines)X
+2015(have)X
+2199(different)X
+720 4248(shortcomings.)N
+1219(First,)X
+1413(the)X
+1539(notion)X
+1771(of)X
+1865(a)X
+1928(single)X
+2146(hash)X
+2320(table)X
+720 4336(is)N
+807(embedded)X
+1171(in)X
+1266(the)X
+1397(interface,)X
+1732(preventing)X
+2108(an)X
+2217(applica-)X
+720 4424(tion)N
+902(from)X
+1116(accessing)X
+1482(multiple)X
+1806(tables)X
+2050(concurrently.)X
+720 4512(Secondly,)N
+1063(the)X
+1186(routine)X
+1438(to)X
+1525(create)X
+1743(a)X
+1804(hash)X
+1976(table)X
+2157(requires)X
+2440(a)X
+720 4600(parameter)N
+1066(which)X
+1286(declares)X
+1573(the)X
+1694(size)X
+1842(of)X
+1932(the)X
+2053(hash)X
+2223(table.)X
+2422(If)X
+720 4688(this)N
+856(size)X
+1001(is)X
+1074(set)X
+1183(too)X
+1305(low,)X
+1465(performance)X
+1892(degradation)X
+2291(or)X
+2378(the)X
+720 4776(inability)N
+1008(to)X
+1092(add)X
+1230(items)X
+1425(to)X
+1509(the)X
+1628(table)X
+1805(may)X
+1964(result.)X
+2223(In)X
+2311(addi-)X
+720 4864(tion,)N
+2 f
+910(hsearch)X
+1 f
+1210(requires)X
+1515(that)X
+1681(the)X
+1825(application)X
+2226(allocate)X
+720 4952(memory)N
+1037(for)X
+1181(the)X
+1329(key)X
+1495(and)X
+1661(data)X
+1845(items.)X
+2108(Lastly,)X
+2378(the)X
+2 f
+720 5040(hsearch)N
+1 f
+1013(routines)X
+1310(provide)X
+1594(no)X
+1713(interface)X
+2034(to)X
+2135(store)X
+2329(hash)X
+720 5128(tables)N
+927(on)X
+1027(disk.)X
+16 s
+720 5593 MXY
+864 0 Dl
+2 f
+8 s
+760 5648(1)N
+1 f
+9 s
+5673(UNIX)Y
+990(is)X
+1056(a)X
+1106(registered)X
+1408(trademark)X
+1718(of)X
+1796(AT&T.)X
+10 s
+2878 2128(The)N
+3032(goal)X
+3199(of)X
+3295(our)X
+3431(work)X
+3625(was)X
+3779(to)X
+3870(design)X
+4108(and)X
+4253(imple-)X
+2706 2216(ment)N
+2900(a)X
+2970(new)X
+3138(package)X
+3436(that)X
+3590(provides)X
+3899(a)X
+3968(superset)X
+4264(of)X
+4364(the)X
+2706 2304(functionality)N
+3144(of)X
+3240(both)X
+2 f
+3411(dbm)X
+1 f
+3578(and)X
+2 f
+3723(hsearch)X
+1 f
+3977(.)X
+4045(The)X
+4198(package)X
+2706 2392(had)N
+2871(to)X
+2982(overcome)X
+3348(the)X
+3495(interface)X
+3826(shortcomings)X
+4306(cited)X
+2706 2480(above)N
+2930(and)X
+3078(its)X
+3185(implementation)X
+3719(had)X
+3867(to)X
+3961(provide)X
+4238(perfor-)X
+2706 2568(mance)N
+2942(equal)X
+3142(or)X
+3235(superior)X
+3524(to)X
+3612(that)X
+3758(of)X
+3851(the)X
+3975(existing)X
+4253(imple-)X
+2706 2656(mentations.)N
+3152(In)X
+3274(order)X
+3498(to)X
+3614(provide)X
+3913(a)X
+4003(compact)X
+4329(disk)X
+2706 2744(representation,)N
+3224(graceful)X
+3531(table)X
+3729(growth,)X
+4018(and)X
+4176(expected)X
+2706 2832(constant)N
+3033(time)X
+3234(performance,)X
+3720(we)X
+3873(selected)X
+4191(Litwin's)X
+2706 2920(linear)N
+2923(hashing)X
+3206(algorithm)X
+3551([LAR88,)X
+3872(LIT80].)X
+4178(We)X
+4324(then)X
+2706 3008(enhanced)N
+3037(the)X
+3161(algorithm)X
+3498(to)X
+3586(handle)X
+3826(page)X
+4004(over\257ows)X
+4346(and)X
+2706 3096(large)N
+2900(key)X
+3049(handling)X
+3362(with)X
+3537(a)X
+3606(single)X
+3830(mechanism,)X
+4248(named)X
+2706 3184(buddy-in-waiting.)N
+3 f
+2975 3338(Existing)N
+3274(UNIX)X
+3499(Hashing)X
+3802(Techniques)X
+1 f
+2878 3470(Over)N
+3076(the)X
+3210(last)X
+3357(decade,)X
+3637(several)X
+3901(dynamic)X
+4213(hashing)X
+2706 3558(schemes)N
+3000(have)X
+3174(been)X
+3348(developed)X
+3700(for)X
+3816(the)X
+3936(UNIX)X
+4159(timeshar-)X
+2706 3646(ing)N
+2856(system,)X
+3146(starting)X
+3433(with)X
+3622(the)X
+3767(inclusion)X
+4107(of)X
+2 f
+4221(dbm)X
+1 f
+4359(,)X
+4426(a)X
+2706 3734(minimal)N
+3008(database)X
+3321(library)X
+3571(written)X
+3834(by)X
+3950(Ken)X
+4120(Thompson)X
+2706 3822([THOM90],)N
+3141(in)X
+3248(the)X
+3391(Seventh)X
+3694(Edition)X
+3974(UNIX)X
+4220(system.)X
+2706 3910(Since)N
+2916(then,)X
+3106(an)X
+3214(extended)X
+3536(version)X
+3804(of)X
+3903(the)X
+4032(same)X
+4228(library,)X
+2 f
+2706 3998(ndbm)N
+1 f
+2884(,)X
+2933(and)X
+3078(a)X
+3142(public-domain)X
+3637(clone)X
+3839(of)X
+3934(the)X
+4060(latter,)X
+2 f
+4273(sdbm)X
+1 f
+4442(,)X
+2706 4086(have)N
+2902(been)X
+3098(developed.)X
+3491(Another)X
+3797 0.1645(interface-compatible)AX
+2706 4174(library)N
+2 f
+2950(gdbm)X
+1 f
+3128(,)X
+3178(was)X
+3333(recently)X
+3622(made)X
+3826(available)X
+4145(as)X
+4241(part)X
+4395(of)X
+2706 4262(the)N
+2829(Free)X
+2997(Software)X
+3312(Foundation's)X
+3759(\(FSF\))X
+3970(software)X
+4271(distri-)X
+2706 4350(bution.)N
+2878 4464(All)N
+3017(of)X
+3121(these)X
+3323(implementations)X
+3893(are)X
+4029(based)X
+4248(on)X
+4364(the)X
+2706 4552(idea)N
+2871(of)X
+2969(revealing)X
+3299(just)X
+3445(enough)X
+3711(bits)X
+3856(of)X
+3953(a)X
+4019(hash)X
+4196(value)X
+4400(to)X
+2706 4640(locate)N
+2920(a)X
+2978(page)X
+3151(in)X
+3234(a)X
+3291(single)X
+3503(access.)X
+3770(While)X
+2 f
+3987(dbm/ndbm)X
+1 f
+4346(and)X
+2 f
+2706 4728(sdbm)N
+1 f
+2908(map)X
+3079(the)X
+3210(hash)X
+3390(value)X
+3597(directly)X
+3874(to)X
+3968(a)X
+4036(disk)X
+4201(address,)X
+2 f
+2706 4816(gdbm)N
+1 f
+2921(uses)X
+3096(the)X
+3231(hash)X
+3414(value)X
+3624(to)X
+3722(index)X
+3936(into)X
+4096(a)X
+2 f
+4168(directory)X
+1 f
+2706 4904([ENB88])N
+3020(containing)X
+3378(disk)X
+3531(addresses.)X
+2878 5018(The)N
+2 f
+3033(hsearch)X
+1 f
+3317(routines)X
+3605(in)X
+3697(System)X
+3962(V)X
+4049(are)X
+4177(designed)X
+2706 5106(to)N
+2804(provide)X
+3085(memory-resident)X
+3669(hash)X
+3852(tables.)X
+4115(Since)X
+4328(data)X
+2706 5194(access)N
+2948(does)X
+3131(not)X
+3269(require)X
+3533(disk)X
+3702(access,)X
+3964(simple)X
+4213(hashing)X
+2706 5282(schemes)N
+3010(which)X
+3238(may)X
+3408(require)X
+3667(multiple)X
+3964(probes)X
+4209(into)X
+4364(the)X
+2706 5370(table)N
+2889(are)X
+3015(used.)X
+3209(A)X
+3294(more)X
+3486(interesting)X
+3851(version)X
+4114(of)X
+2 f
+4208(hsearch)X
+1 f
+2706 5458(is)N
+2784(a)X
+2845(public)X
+3070(domain)X
+3335(library,)X
+2 f
+3594(dynahash)X
+1 f
+3901(,)X
+3945(that)X
+4089(implements)X
+2706 5546(Larson's)N
+3036(in-memory)X
+3440(adaptation)X
+3822([LAR88])X
+4164(of)X
+4279(linear)X
+2706 5634(hashing)N
+2975([LIT80].)X
+3 f
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+1 f
+4424(1)X
+
+2 p
+%%Page: 2 2
+10 s 10 xH 0 xS 1 f
+3 f
+432 258(A)N
+510(New)X
+682(Hashing)X
+985(Package)X
+1290(for)X
+1413(UNIX)X
+3663(Seltzer)X
+3920(&)X
+4007(Yigit)X
+2 f
+1074 538(dbm)N
+1 f
+1232(and)X
+2 f
+1368(ndbm)X
+1 f
+604 670(The)N
+2 f
+760(dbm)X
+1 f
+928(and)X
+2 f
+1074(ndbm)X
+1 f
+1282(library)X
+1526(implementations)X
+2089(are)X
+432 758(based)N
+667(on)X
+799(the)X
+949(same)X
+1166(algorithm)X
+1529(by)X
+1661(Ken)X
+1846(Thompson)X
+432 846([THOM90,)N
+824(TOR88,)X
+1113(WAL84],)X
+1452(but)X
+1582(differ)X
+1789(in)X
+1879(their)X
+2054(pro-)X
+432 934(grammatic)N
+801(interfaces.)X
+1160(The)X
+1311(latter)X
+1502(is)X
+1581(a)X
+1643(modi\256ed)X
+1952(version)X
+432 1022(of)N
+533(the)X
+665(former)X
+918(which)X
+1148(adds)X
+1328(support)X
+1601(for)X
+1728(multiple)X
+2027(data-)X
+432 1110(bases)N
+634(to)X
+724(be)X
+828(open)X
+1011(concurrently.)X
+1484(The)X
+1636(discussion)X
+1996(of)X
+2090(the)X
+432 1198(algorithm)N
+774(that)X
+925(follows)X
+1196(is)X
+1280(applicable)X
+1640(to)X
+1732(both)X
+2 f
+1904(dbm)X
+1 f
+2072(and)X
+2 f
+432 1286(ndbm)N
+1 f
+610(.)X
+604 1400(The)N
+760(basic)X
+956(structure)X
+1268(of)X
+2 f
+1366(dbm)X
+1 f
+1535(calls)X
+1712(for)X
+1836(\256xed-sized)X
+432 1488(disk)N
+612(blocks)X
+868(\(buckets\))X
+1214(and)X
+1377(an)X
+2 f
+1499(access)X
+1 f
+1755(function)X
+2068(that)X
+432 1576(maps)N
+623(a)X
+681(key)X
+819(to)X
+902(a)X
+959(bucket.)X
+1234(The)X
+1380(interface)X
+1683(routines)X
+1962(use)X
+2090(the)X
+2 f
+432 1664(access)N
+1 f
+673(function)X
+970(to)X
+1062(obtain)X
+1292(the)X
+1420(appropriate)X
+1816(bucket)X
+2060(in)X
+2152(a)X
+432 1752(single)N
+643(disk)X
+796(access.)X
+604 1866(Within)N
+869(the)X
+2 f
+1010(access)X
+1 f
+1263(function,)X
+1593(a)X
+1672(bit-randomizing)X
+432 1954(hash)N
+610(function)X
+2 f
+8 s
+877 1929(2)N
+1 f
+10 s
+940 1954(is)N
+1024(used)X
+1202(to)X
+1294(convert)X
+1565(a)X
+1631(key)X
+1777(into)X
+1931(a)X
+1997(32-bit)X
+432 2042(hash)N
+605(value.)X
+825(Out)X
+971(of)X
+1064(these)X
+1254(32)X
+1359(bits,)X
+1519(only)X
+1686(as)X
+1778(many)X
+1981(bits)X
+2121(as)X
+432 2130(necessary)N
+773(are)X
+900(used)X
+1075(to)X
+1165(determine)X
+1514(the)X
+1639(particular)X
+1974(bucket)X
+432 2218(on)N
+533(which)X
+750(a)X
+807(key)X
+944(resides.)X
+1228(An)X
+1347(in-memory)X
+1724(bitmap)X
+1967(is)X
+2041(used)X
+432 2306(to)N
+533(determine)X
+893(how)X
+1070(many)X
+1287(bits)X
+1441(are)X
+1579(required.)X
+1905(Each)X
+2104(bit)X
+432 2394(indicates)N
+746(whether)X
+1033(its)X
+1136(associated)X
+1494(bucket)X
+1736(has)X
+1871(been)X
+2051(split)X
+432 2482(yet)N
+562(\(a)X
+657(0)X
+728(indicating)X
+1079(that)X
+1230(the)X
+1359(bucket)X
+1604(has)X
+1742(not)X
+1875(yet)X
+2004(split\).)X
+432 2570(The)N
+590(use)X
+730(of)X
+830(the)X
+961(hash)X
+1141(function)X
+1441(and)X
+1590(the)X
+1720(bitmap)X
+1974(is)X
+2059(best)X
+432 2658(described)N
+769(by)X
+878(stepping)X
+1177(through)X
+1454(database)X
+1759(creation)X
+2046(with)X
+432 2746(multiple)N
+718(invocations)X
+1107(of)X
+1194(a)X
+2 f
+1250(store)X
+1 f
+1430(operation.)X
+604 2860(Initially,)N
+906(the)X
+1033(hash)X
+1209(table)X
+1394(contains)X
+1690(a)X
+1755(single)X
+1974(bucket)X
+432 2948(\(bucket)N
+711(0\),)X
+836(the)X
+972(bit)X
+1094(map)X
+1270(contains)X
+1575(a)X
+1649(single)X
+1878(bit)X
+2000(\(bit)X
+2148(0)X
+432 3036(corresponding)N
+913(to)X
+997(bucket)X
+1233(0\),)X
+1342(and)X
+1480(0)X
+1542(bits)X
+1699(of)X
+1788(a)X
+1846(hash)X
+2014(value)X
+432 3124(are)N
+560(examined)X
+901(to)X
+992(determine)X
+1342(where)X
+1568(a)X
+1633(key)X
+1778(is)X
+1860(placed)X
+2099(\(in)X
+432 3212(bucket)N
+670(0\).)X
+801(When)X
+1017(bucket)X
+1255(0)X
+1319(is)X
+1396(full,)X
+1551(its)X
+1650(bit)X
+1758(in)X
+1844(the)X
+1966(bitmap)X
+432 3300(\(bit)N
+564(0\))X
+652(is)X
+726(set,)X
+856(and)X
+993(its)X
+1089(contents)X
+1377(are)X
+1497(split)X
+1655(between)X
+1943(buckets)X
+432 3388(0)N
+499(and)X
+641(1,)X
+727(by)X
+833(considering)X
+1233(the)X
+1357(0)X
+2 f
+7 s
+3356(th)Y
+10 s
+1 f
+1480 3388(bit)N
+1590(\(the)X
+1741(lowest)X
+1976(bit)X
+2086(not)X
+432 3476(previously)N
+800(examined\))X
+1169(of)X
+1266(the)X
+1393(hash)X
+1569(value)X
+1772(for)X
+1895(each)X
+2072(key)X
+432 3564(within)N
+668(the)X
+798(bucket.)X
+1064(Given)X
+1292(a)X
+1359(well-designed)X
+1840(hash)X
+2018(func-)X
+432 3652(tion,)N
+613(approximately)X
+1112(half)X
+1273(of)X
+1376(the)X
+1510(keys)X
+1693(will)X
+1853(have)X
+2041(hash)X
+432 3740(values)N
+666(with)X
+837(the)X
+964(0)X
+2 f
+7 s
+3708(th)Y
+10 s
+1 f
+1090 3740(bit)N
+1203(set.)X
+1341(All)X
+1471(such)X
+1646(keys)X
+1821(and)X
+1965(associ-)X
+432 3828(ated)N
+586(data)X
+740(are)X
+859(moved)X
+1097(to)X
+1179(bucket)X
+1413(1,)X
+1493(and)X
+1629(the)X
+1747(rest)X
+1883(remain)X
+2126(in)X
+432 3916(bucket)N
+666(0.)X
+604 4030(After)N
+804(this)X
+949(split,)X
+1135(the)X
+1262(\256le)X
+1393(now)X
+1560(contains)X
+1856(two)X
+2005(buck-)X
+432 4118(ets,)N
+562(and)X
+699(the)X
+818(bitmap)X
+1061(contains)X
+1349(three)X
+1530(bits:)X
+1687(the)X
+1805(0)X
+2 f
+7 s
+4086(th)Y
+10 s
+1 f
+1922 4118(bit)N
+2026(is)X
+2099(set)X
+432 4206(to)N
+525(indicate)X
+810(a)X
+876(bucket)X
+1120(0)X
+1190(split)X
+1357(when)X
+1561(no)X
+1671(bits)X
+1816(of)X
+1913(the)X
+2041(hash)X
+432 4294(value)N
+648(are)X
+789(considered,)X
+1199(and)X
+1357(two)X
+1519(more)X
+1726(unset)X
+1937(bits)X
+2094(for)X
+432 4382(buckets)N
+706(0)X
+775(and)X
+920(1.)X
+1029(The)X
+1183(placement)X
+1542(of)X
+1638(an)X
+1742(incoming)X
+2072(key)X
+432 4470(now)N
+604(requires)X
+897(examination)X
+1327(of)X
+1428(the)X
+1560(0)X
+2 f
+7 s
+4438(th)Y
+10 s
+1 f
+1691 4470(bit)N
+1809(of)X
+1910(the)X
+2041(hash)X
+432 4558(value,)N
+667(and)X
+824(the)X
+963(key)X
+1119(is)X
+1212(placed)X
+1462(either)X
+1685(in)X
+1787(bucket)X
+2041(0)X
+2121(or)X
+432 4646(bucket)N
+674(1.)X
+782(If)X
+864(either)X
+1075(bucket)X
+1317(0)X
+1385(or)X
+1480(bucket)X
+1722(1)X
+1790(\256lls)X
+1937(up,)X
+2064(it)X
+2135(is)X
+432 4734(split)N
+598(as)X
+693(before,)X
+947(its)X
+1050(bit)X
+1162(is)X
+1243(set)X
+1360(in)X
+1450(the)X
+1576(bitmap,)X
+1846(and)X
+1990(a)X
+2054(new)X
+432 4822(set)N
+541(of)X
+628(unset)X
+817(bits)X
+952(are)X
+1071(added)X
+1283(to)X
+1365(the)X
+1483(bitmap.)X
+604 4936(Each)N
+791(time)X
+959(we)X
+1079(consider)X
+1376(a)X
+1437(new)X
+1596(bit)X
+1705(\(bit)X
+1841(n\),)X
+1953(we)X
+2072(add)X
+432 5024(2)N
+2 f
+7 s
+4992(n)Y
+9 f
+509(+)X
+1 f
+540(1)X
+10 s
+595 5024(bits)N
+737(to)X
+826(the)X
+951(bitmap)X
+1199(and)X
+1341(obtain)X
+1567(2)X
+2 f
+7 s
+4992(n)Y
+9 f
+1644(+)X
+1 f
+1675(1)X
+10 s
+1729 5024(more)N
+1920(address-)X
+432 5112(able)N
+595(buckets)X
+869(in)X
+960(the)X
+1087(\256le.)X
+1258(As)X
+1376(a)X
+1441(result,)X
+1668(the)X
+1795(bitmap)X
+2045(con-)X
+432 5200(tains)N
+618(the)X
+751(previous)X
+1062(2)X
+2 f
+7 s
+5168(n)Y
+9 f
+1139(+)X
+1 f
+1170(1)X
+2 f
+10 s
+9 f
+5200(-)Y
+1 f
+1242(1)X
+1317(bits)X
+1467(\(1)X
+2 f
+9 f
+1534(+)X
+1 f
+1578(2)X
+2 f
+9 f
+(+)S
+1 f
+1662(4)X
+2 f
+9 f
+(+)S
+1 f
+1746(...)X
+2 f
+9 f
+(+)S
+1 f
+1850(2)X
+2 f
+7 s
+5168(n)Y
+10 s
+1 f
+1931 5200(\))N
+1992(which)X
+432 5288(trace)N
+649(the)X
+807(entire)X
+2 f
+1050(split)X
+1247(history)X
+1 f
+1529(of)X
+1656(the)X
+1813(addressable)X
+16 s
+432 5433 MXY
+864 0 Dl
+2 f
+8 s
+472 5488(2)N
+1 f
+9 s
+523 5513(This)N
+670(bit-randomizing)X
+1153(property)X
+1416(is)X
+1482(important)X
+1780(to)X
+1854(obtain)X
+2052(radi-)X
+432 5593(cally)N
+599(different)X
+874(hash)X
+1033(values)X
+1244(for)X
+1355(nearly)X
+1562(identical)X
+1836(keys,)X
+2012(which)X
+432 5673(in)N
+506(turn)X
+640(avoids)X
+846(clustering)X
+1148(of)X
+1226(such)X
+1376(keys)X
+1526(in)X
+1600(a)X
+1650(single)X
+1840(bucket.)X
+10 s
+2418 538(buckets.)N
+2590 652(Given)N
+2809(a)X
+2868(key)X
+3007(and)X
+3146(the)X
+3267(bitmap)X
+3512(created)X
+3768(by)X
+3871(this)X
+4009(algo-)X
+2418 740(rithm,)N
+2638(we)X
+2759(\256rst)X
+2910(examine)X
+3209(bit)X
+3320(0)X
+3386(of)X
+3479(the)X
+3603(bitmap)X
+3851(\(the)X
+4002(bit)X
+4112(to)X
+2418 828(consult)N
+2673(when)X
+2871(0)X
+2934(bits)X
+3072(of)X
+3162(the)X
+3283(hash)X
+3453(value)X
+3650(are)X
+3772(being)X
+3973(exam-)X
+2418 916(ined\).)N
+2631(If)X
+2713(it)X
+2785(is)X
+2866(set)X
+2982(\(indicating)X
+3356(that)X
+3503(the)X
+3628(bucket)X
+3869(split\),)X
+4080(we)X
+2418 1004(begin)N
+2617(considering)X
+3012(the)X
+3131(bits)X
+3267(of)X
+3355(the)X
+3473(32-bit)X
+3684(hash)X
+3851(value.)X
+4085(As)X
+2418 1092(bit)N
+2525(n)X
+2587(is)X
+2662(revealed,)X
+2977(a)X
+3035(mask)X
+3226(equal)X
+3422(to)X
+3506(2)X
+2 f
+7 s
+1060(n)Y
+9 f
+3583(+)X
+1 f
+3614(1)X
+2 f
+10 s
+9 f
+1092(-)Y
+1 f
+3686(1)X
+3748(will)X
+3894(yield)X
+4076(the)X
+2418 1180(current)N
+2675(bucket)X
+2918(address.)X
+3228(Adding)X
+3496(2)X
+2 f
+7 s
+1148(n)Y
+9 f
+3573(+)X
+1 f
+3604(1)X
+2 f
+10 s
+9 f
+1180(-)Y
+1 f
+3676(1)X
+3744(to)X
+3834(the)X
+3960(bucket)X
+2418 1268(address)N
+2701(identi\256es)X
+3035(which)X
+3272(bit)X
+3397(in)X
+3500(the)X
+3639(bitmap)X
+3902(must)X
+4098(be)X
+2418 1356(checked.)N
+2743(We)X
+2876(continue)X
+3173(revealing)X
+3493(bits)X
+3628(of)X
+3715(the)X
+3833(hash)X
+4000(value)X
+2418 1444(until)N
+2591(all)X
+2698(set)X
+2814(bits)X
+2955(in)X
+3043(the)X
+3167(bitmap)X
+3415(are)X
+3540(exhausted.)X
+3907(The)X
+4058(fol-)X
+2418 1532(lowing)N
+2682(algorithm,)X
+3055(a)X
+3133(simpli\256cation)X
+3614(of)X
+3723(the)X
+3863(algorithm)X
+2418 1620(due)N
+2565(to)X
+2658(Ken)X
+2823(Thompson)X
+3196([THOM90,)X
+3590(TOR88],)X
+3908(uses)X
+4076(the)X
+2418 1708(hash)N
+2625(value)X
+2839(and)X
+2995(the)X
+3133(bitmap)X
+3395(to)X
+3497(calculate)X
+3823(the)X
+3960(bucket)X
+2418 1796(address)N
+2679(as)X
+2766(discussed)X
+3093(above.)X
+0(Courier)xf 0 f
+1 f
+0 f
+8 s
+2418 2095(hash)N
+2608(=)X
+2684 -0.4038(calchash\(key\);)AX
+2418 2183(mask)N
+2608(=)X
+2684(0;)X
+2418 2271(while)N
+2646 -0.4018(\(isbitset\(\(hash)AX
+3254(&)X
+3330(mask\))X
+3558(+)X
+3634(mask\)\))X
+2706 2359(mask)N
+2896(=)X
+2972(\(mask)X
+3200(<<)X
+3314(1\))X
+3428(+)X
+3504(1;)X
+2418 2447(bucket)N
+2684(=)X
+2760(hash)X
+2950(&)X
+3026(mask;)X
+2 f
+10 s
+3211 2812(sdbm)N
+1 f
+2590 2944(The)N
+2 f
+2738(sdbm)X
+1 f
+2930(library)X
+3167(is)X
+3243(a)X
+3302(public-domain)X
+3791(clone)X
+3987(of)X
+4076(the)X
+2 f
+2418 3032(ndbm)N
+1 f
+2638(library,)X
+2914(developed)X
+3286(by)X
+3408(Ozan)X
+3620(Yigit)X
+3826(to)X
+3929(provide)X
+2 f
+2418 3120(ndbm)N
+1 f
+2596('s)X
+2692(functionality)X
+3139(under)X
+3359(some)X
+3565(versions)X
+3869(of)X
+3973(UNIX)X
+2418 3208(that)N
+2559(exclude)X
+2830(it)X
+2894(for)X
+3008(licensing)X
+3317(reasons)X
+3578([YIG89].)X
+3895(The)X
+4040(pro-)X
+2418 3296(grammer)N
+2735(interface,)X
+3064(and)X
+3207(the)X
+3332(basic)X
+3524(structure)X
+3832(of)X
+2 f
+3926(sdbm)X
+1 f
+4121(is)X
+2418 3384(identical)N
+2733(to)X
+2 f
+2834(ndbm)X
+1 f
+3051(but)X
+3192(internal)X
+3476(details)X
+3723(of)X
+3828(the)X
+2 f
+3964(access)X
+1 f
+2418 3472(function,)N
+2726(such)X
+2894(as)X
+2982(the)X
+3101(calculation)X
+3474(of)X
+3561(the)X
+3679(bucket)X
+3913(address,)X
+2418 3560(and)N
+2563(the)X
+2690(use)X
+2825(of)X
+2920(different)X
+3225(hash)X
+3400(functions)X
+3726(make)X
+3928(the)X
+4054(two)X
+2418 3648(incompatible)N
+2856(at)X
+2934(the)X
+3052(database)X
+3349(level.)X
+2590 3762(The)N
+2 f
+2740(sdbm)X
+1 f
+2934(library)X
+3173(is)X
+3251(based)X
+3458(on)X
+3562(a)X
+3622(simpli\256ed)X
+3965(imple-)X
+2418 3850(mentation)N
+2778(of)X
+2885(Larson's)X
+3206(1978)X
+2 f
+3406(dynamic)X
+3717(hashing)X
+1 f
+4009(algo-)X
+2418 3938(rithm)N
+2616(including)X
+2943(the)X
+2 f
+3066(re\256nements)X
+3461(and)X
+3605(variations)X
+1 f
+3953(of)X
+4044(sec-)X
+2418 4026(tion)N
+2562(5)X
+2622([LAR78].)X
+2956(Larson's)X
+3257(original)X
+3526(algorithm)X
+3857(calls)X
+4024(for)X
+4138(a)X
+2418 4114(forest)N
+2635(of)X
+2736(binary)X
+2975(hash)X
+3156(trees)X
+3341(that)X
+3494(are)X
+3626(accessed)X
+3941(by)X
+4054(two)X
+2418 4202(hash)N
+2586(functions.)X
+2925(The)X
+3071(\256rst)X
+3216(hash)X
+3384(function)X
+3672(selects)X
+3907(a)X
+3964(partic-)X
+2418 4290(ular)N
+2571(tree)X
+2720(within)X
+2952(the)X
+3078(forest.)X
+3309(The)X
+3462(second)X
+3713(hash)X
+3887(function,)X
+2418 4378(which)N
+2659(is)X
+2757(required)X
+3070(to)X
+3177(be)X
+3297(a)X
+3377(boolean)X
+3675(pseudo-random)X
+2418 4466(number)N
+2687(generator)X
+3015(that)X
+3159(is)X
+3236(seeded)X
+3479(by)X
+3583(the)X
+3705(key,)X
+3865(is)X
+3942(used)X
+4112(to)X
+2418 4554(traverse)N
+2733(the)X
+2890(tree)X
+3070(until)X
+3275(internal)X
+3579(\(split\))X
+3829(nodes)X
+4075(are)X
+2418 4642(exhausted)N
+2763(and)X
+2903(an)X
+3003(external)X
+3286(\(non-split\))X
+3648(node)X
+3827(is)X
+3903(reached.)X
+2418 4730(The)N
+2571(bucket)X
+2813(addresses)X
+3149(are)X
+3276(stored)X
+3500(directly)X
+3772(in)X
+3861(the)X
+3986(exter-)X
+2418 4818(nal)N
+2536(nodes.)X
+2590 4932(Larson's)N
+2903(re\256nements)X
+3309(are)X
+3440(based)X
+3655(on)X
+3767(the)X
+3897(observa-)X
+2418 5020(tion)N
+2570(that)X
+2718(the)X
+2844(nodes)X
+3059(can)X
+3199(be)X
+3303(represented)X
+3702(by)X
+3809(a)X
+3872(single)X
+4090(bit)X
+2418 5108(that)N
+2569(is)X
+2653(set)X
+2773(for)X
+2898(internal)X
+3174(nodes)X
+3392(and)X
+3539(not)X
+3672(set)X
+3791(for)X
+3915(external)X
+2418 5196(nodes,)N
+2652(resulting)X
+2959(in)X
+3048(a)X
+3111(radix)X
+3303(search)X
+3536(trie.)X
+3709(Figure)X
+3944(1)X
+4010(illus-)X
+2418 5284(trates)N
+2621(this.)X
+2804(Nodes)X
+3037(A)X
+3123(and)X
+3267(B)X
+3348(are)X
+3475(internal)X
+3748(\(split\))X
+3967(nodes,)X
+2418 5372(thus)N
+2573(having)X
+2813(no)X
+2915(bucket)X
+3151(addresses)X
+3480(associated)X
+3831(with)X
+3994(them.)X
+2418 5460(Instead,)N
+2693(the)X
+2814(external)X
+3096(nodes)X
+3306(\(C,)X
+3429(D,)X
+3530(and)X
+3669(E\))X
+3768(each)X
+3938(need)X
+4112(to)X
+2418 5548(refer)N
+2594(to)X
+2679(a)X
+2738(bucket)X
+2975(address.)X
+3279(These)X
+3494(bucket)X
+3731(addresses)X
+4062(can)X
+2418 5636(be)N
+2529(stored)X
+2760(in)X
+2857(the)X
+2990(trie)X
+3132(itself)X
+3327(where)X
+3559(the)X
+3691(subtries)X
+3974(would)X
+3 f
+432 5960(2)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+3 p
+%%Page: 3 3
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+720 258(Seltzer)N
+977(&)X
+1064(Yigit)X
+3278(A)X
+3356(New)X
+3528(Hashing)X
+3831(Package)X
+4136(for)X
+4259(UNIX)X
+1 f
+720 538(live)N
+862(if)X
+933(they)X
+1092(existed)X
+1340([KNU68].)X
+1709(For)X
+1841(example,)X
+2154(if)X
+2224(nodes)X
+2432(F)X
+720 626(and)N
+858(G)X
+938(were)X
+1117(the)X
+1237(children)X
+1522(of)X
+1610(node)X
+1787(C,)X
+1881(the)X
+2000(bucket)X
+2235(address)X
+720 714(L00)N
+886(could)X
+1101(reside)X
+1330(in)X
+1429(the)X
+1563(bits)X
+1714(that)X
+1870(will)X
+2030(eventually)X
+2400(be)X
+720 802(used)N
+887(to)X
+969(store)X
+1145(nodes)X
+1352(F)X
+1416(and)X
+1552(G)X
+1630(and)X
+1766(all)X
+1866(their)X
+2033(children.)X
+10 f
+720 890 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+1894 2247(L1)N
+784 1925(A)N
+1431(E)X
+1106 2247(D)N
+1428 1281(C)N
+1109 1603(B)N
+1884 1930(L01)N
+1879 1286(L00)N
+1221 1814(1)N
+903 2131(1)N
+1221 1402(0)N
+903 1714(0)N
+1 Dt
+1397 1821 MXY
+-8 -32 Dl
+-5 19 Dl
+-20 6 Dl
+33 7 Dl
+-187 -182 Dl
+1397 1322 MXY
+-33 7 Dl
+20 6 Dl
+5 19 Dl
+8 -32 Dl
+-187 182 Dl
+1069 1639 MXY
+-32 7 Dl
+20 6 Dl
+5 19 Dl
+7 -32 Dl
+-186 182 Dl
+1374 1891 MXY
+185 Dc
+1779 2133 MXY
+0 161 Dl
+322 0 Dl
+0 -161 Dl
+-322 0 Dl
+1811 MY
+0 161 Dl
+322 0 Dl
+0 -161 Dl
+-322 0 Dl
+1166 MY
+0 161 Dl
+322 0 Dl
+0 -161 Dl
+-322 0 Dl
+1052 2213 MXY
+185 Dc
+1569 MY
+185 Dc
+720 1881 MXY
+185 Dc
+1779 2213 MXY
+-28 -17 Dl
+10 17 Dl
+-10 18 Dl
+28 -18 Dl
+-543 0 Dl
+1769 1891 MXY
+-28 -18 Dl
+10 18 Dl
+-10 18 Dl
+28 -18 Dl
+-201 0 Dl
+1364 1247 MXY
+185 Dc
+1769 MX
+-28 -18 Dl
+10 18 Dl
+-10 18 Dl
+28 -18 Dl
+-201 0 Dl
+1064 2143 MXY
+-7 -32 Dl
+-5 19 Dl
+-20 6 Dl
+32 7 Dl
+-181 -181 Dl
+3 Dt
+-1 Ds
+8 s
+720 2482(Figure)N
+925(1:)X
+1 f
+1002(Radix)X
+1179(search)X
+1365(trie)X
+1474(with)X
+1612(internal)X
+1831(nodes)X
+2004(A)X
+2074(and)X
+2189(B,)X
+2271(external)X
+720 2570(nodes)N
+891(C,)X
+972(D,)X
+1056(and)X
+1170(E,)X
+1247(and)X
+1361(bucket)X
+1553(addresses)X
+1819(stored)X
+1997(in)X
+2069(the)X
+2168(unused)X
+2370(por-)X
+720 2658(tion)N
+836(of)X
+905(the)X
+999(trie.)X
+10 s
+10 f
+720 2922 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+1 f
+892 3124(Further)N
+1153(simpli\256cations)X
+1647(of)X
+1738(the)X
+1860(above)X
+2076([YIG89])X
+2377(are)X
+720 3212(possible.)N
+1038(Using)X
+1265(a)X
+1337(single)X
+1564(radix)X
+1765(trie)X
+1908(to)X
+2006(avoid)X
+2219(the)X
+2352(\256rst)X
+720 3300(hash)N
+904(function,)X
+1227(replacing)X
+1562(the)X
+1696(pseudo-random)X
+2231(number)X
+720 3388(generator)N
+1052(with)X
+1222(a)X
+1286(well)X
+1452(designed,)X
+1785(bit-randomizing)X
+2329(hash)X
+720 3476(function,)N
+1053(and)X
+1215(using)X
+1434(the)X
+1578(portion)X
+1855(of)X
+1967(the)X
+2110(hash)X
+2302(value)X
+720 3564(exposed)N
+1021(during)X
+1268(the)X
+1404(trie)X
+1549(traversal)X
+1864(as)X
+1969(a)X
+2042(direct)X
+2262(bucket)X
+720 3652(address)N
+990(results)X
+1228(in)X
+1319(an)X
+2 f
+1424(access)X
+1 f
+1663(function)X
+1959(that)X
+2108(works)X
+2333(very)X
+720 3740(similar)N
+974(to)X
+1068(Thompson's)X
+1499(algorithm)X
+1841(above.)X
+2084(The)X
+2240(follow-)X
+720 3828(ing)N
+847(algorithm)X
+1183(uses)X
+1346(the)X
+1469(hash)X
+1641(value)X
+1840(to)X
+1927(traverse)X
+2206(a)X
+2266(linear-)X
+720 3916(ized)N
+874(radix)X
+1059(trie)X
+2 f
+8 s
+1166 3891(3)N
+1 f
+10 s
+1218 3916(starting)N
+1478(at)X
+1556(the)X
+1674(0)X
+2 f
+7 s
+3884(th)Y
+10 s
+1 f
+1791 3916(bit.)N
+0 f
+8 s
+720 4215(tbit)N
+910(=)X
+986(0;)X
+1296(/*)X
+1410(radix)X
+1638(trie)X
+1828(index)X
+2056(*/)X
+720 4303(hbit)N
+910(=)X
+986(0;)X
+1296(/*)X
+1410(hash)X
+1600(bit)X
+1752(index)X
+2056(*/)X
+720 4391(mask)N
+910(=)X
+986(0;)X
+720 4479(hash)N
+910(=)X
+986 -0.4038(calchash\(key\);)AX
+720 4655(for)N
+872(\(mask)X
+1100(=)X
+1176(0;)X
+910 4743 -0.4018(isbitset\(tbit\);)AN
+910 4831(mask)N
+1100(=)X
+1176(\(mask)X
+1404(<<)X
+1518(1\))X
+1632(+)X
+1708(1\))X
+1008 4919(if)N
+1122(\(hash)X
+1350(&)X
+1426(\(1)X
+1540(<<)X
+1654 -0.4219(hbit++\)\)\))AX
+1160 5007(/*)N
+1274(right)X
+1502(son)X
+1692(*/)X
+1160 5095(tbit)N
+1350(=)X
+1426(2)X
+1502(*)X
+1578(tbit)X
+1768(+)X
+1844(2;)X
+1008 5183(else)N
+1 f
+16 s
+720 5353 MXY
+864 0 Dl
+2 f
+8 s
+760 5408(3)N
+1 f
+9 s
+818 5433(A)N
+896(linearized)X
+1206(radix)X
+1380(trie)X
+1502(is)X
+1576(merely)X
+1802(an)X
+1895(array)X
+2068(representation)X
+720 5513(of)N
+800(the)X
+908(radix)X
+1076(search)X
+1280(trie)X
+1396(described)X
+1692(above.)X
+1920(The)X
+2052(children)X
+2308(of)X
+2388(the)X
+720 5593(node)N
+885(with)X
+1038(index)X
+1223(i)X
+1267(can)X
+1391(be)X
+1483(found)X
+1675(at)X
+1751(the)X
+1863(nodes)X
+2055(indexed)X
+2307(2*i+1)X
+720 5673(and)N
+842(2*i+2.)X
+0 f
+8 s
+3146 538(/*)N
+3260(left)X
+3450(son)X
+3678(*/)X
+3146 626(tbit)N
+3336(=)X
+3412(2)X
+3488(*)X
+3564(tbit)X
+3754(+)X
+3830(1;)X
+2706 802(bucket)N
+2972(=)X
+3048(hash)X
+3238(&)X
+3314(mask;)X
+2 f
+10 s
+3495 1167(gdbm)N
+1 f
+2878 1299(The)N
+3027(gdbm)X
+3233(\(GNU)X
+3458(data)X
+3616(base)X
+3783(manager\))X
+4111(library)X
+4349(is)X
+4426(a)X
+2706 1387(UNIX)N
+2933(database)X
+3236(manager)X
+3539(written)X
+3792(by)X
+3897(Philip)X
+4112(A.)X
+4215(Nelson,)X
+2706 1475(and)N
+2848(made)X
+3048(available)X
+3364(as)X
+3457(a)X
+3518(part)X
+3668(of)X
+3760(the)X
+3883(FSF)X
+4040(software)X
+4342(dis-)X
+2706 1563(tribution.)N
+3052(The)X
+3207(gdbm)X
+3419(library)X
+3663(provides)X
+3969(the)X
+4097(same)X
+4292(func-)X
+2706 1651(tionality)N
+3028(of)X
+3151(the)X
+2 f
+3304(dbm)X
+1 f
+3442(/)X
+2 f
+3464(ndbm)X
+1 f
+3697(libraries)X
+4015([NEL90])X
+4360(but)X
+2706 1739(attempts)N
+3018(to)X
+3121(avoid)X
+3340(some)X
+3550(of)X
+3658(their)X
+3846(shortcomings.)X
+4337(The)X
+2706 1827(gdbm)N
+2918(library)X
+3162(allows)X
+3401(for)X
+3525(arbitrary-length)X
+4059(data,)X
+4242(and)X
+4387(its)X
+2706 1915(database)N
+3027(is)X
+3124(a)X
+3203(singular,)X
+3524(non-sparse)X
+2 f
+8 s
+3872 1890(4)N
+1 f
+10 s
+3947 1915(\256le.)N
+4112(The)X
+4280(gdbm)X
+2706 2003(library)N
+2947(also)X
+3103(includes)X
+2 f
+3396(dbm)X
+1 f
+3560(and)X
+2 f
+3702(ndbm)X
+1 f
+3906(compatible)X
+4288(inter-)X
+2706 2091(faces.)N
+2878 2205(The)N
+3025(gdbm)X
+3229(library)X
+3465(is)X
+3540(based)X
+3745(on)X
+2 f
+3847(extensible)X
+4189(hashing)X
+1 f
+4442(,)X
+2706 2293(a)N
+2766(dynamic)X
+3066(hashing)X
+3339(algorithm)X
+3674(by)X
+3778(Fagin)X
+3984(et)X
+4066(al)X
+4148([FAG79].)X
+2706 2381(This)N
+2881(algorithm)X
+3225(differs)X
+3467(from)X
+3655(the)X
+3785(previously)X
+4155(discussed)X
+2706 2469(algorithms)N
+3069(in)X
+3152(that)X
+3293(it)X
+3358(uses)X
+3517(a)X
+2 f
+3574(directory)X
+1 f
+3889(that)X
+4030(is)X
+4103(a)X
+4159(collapsed)X
+2706 2557(representation)N
+3192([ENB88])X
+3517(of)X
+3615(the)X
+3744(radix)X
+3940(search)X
+4177(trie)X
+4315(used)X
+2706 2645(by)N
+2 f
+2806(sdbm)X
+1 f
+2975(.)X
+10 f
+2706 2733 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+7 s
+3572 3761(L1)N
+1 Dt
+3485 3738 MXY
+-20 -13 Dl
+7 13 Dl
+-7 13 Dl
+20 -13 Dl
+-400 0 Dl
+3180 3027 MXY
+136 Dc
+2706 3494 MXY
+136 Dc
+2950 3264 MXY
+136 Dc
+3738 MY
+136 Dc
+3485 2968 MXY
+0 118 Dl
+238 0 Dl
+0 -118 Dl
+-238 0 Dl
+3442 MY
+0 119 Dl
+238 0 Dl
+0 -119 Dl
+-238 0 Dl
+3679 MY
+0 119 Dl
+238 0 Dl
+0 -119 Dl
+-238 0 Dl
+3187 3501 MXY
+136 Dc
+2963 3316 MXY
+-24 5 Dl
+15 4 Dl
+4 15 Dl
+5 -24 Dl
+-137 134 Dl
+3204 3083 MXY
+-24 5 Dl
+15 4 Dl
+3 14 Dl
+6 -23 Dl
+-137 133 Dl
+3204 3450 MXY
+-6 -24 Dl
+-3 14 Dl
+-15 5 Dl
+24 5 Dl
+-137 -134 Dl
+2842 3369(0)N
+3075 3139(0)N
+2842 3676(1)N
+3075 3443(1)N
+3562 3054(L00)N
+3565 3528(L01)N
+4197 2968 MXY
+0 118 Dl
+237 0 Dl
+0 -118 Dl
+-237 0 Dl
+3205 MY
+0 119 Dl
+237 0 Dl
+0 -119 Dl
+-237 0 Dl
+3561 MY
+0 118 Dl
+237 0 Dl
+0 -118 Dl
+-237 0 Dl
+3960 2909 MXY
+0 237 Dl
+118 0 Dl
+0 -237 Dl
+-118 0 Dl
+3146 MY
+0 237 Dl
+118 0 Dl
+0 -237 Dl
+-118 0 Dl
+3383 MY
+0 237 Dl
+118 0 Dl
+0 -237 Dl
+-118 0 Dl
+3620 MY
+0 237 Dl
+118 0 Dl
+0 -237 Dl
+-118 0 Dl
+4197 3027 MXY
+-21 -13 Dl
+8 13 Dl
+-8 13 Dl
+21 -13 Dl
+-119 0 Dl
+4197 3264 MXY
+-21 -13 Dl
+8 13 Dl
+-8 13 Dl
+21 -13 Dl
+-119 0 Dl
+3501 MY
+59 0 Dl
+0 89 Dl
+4078 3738 MXY
+59 0 Dl
+0 -88 Dl
+4197 3590 MXY
+-21 -13 Dl
+8 13 Dl
+-8 13 Dl
+21 -13 Dl
+-60 0 Dl
+4197 3650 MXY
+-21 -13 Dl
+8 13 Dl
+-8 13 Dl
+21 -13 Dl
+-60 0 Dl
+3991 3050(00)N
+3991 3287(01)N
+3991 3524(10)N
+3991 3761(11)N
+4269 3050(L00)N
+4269 3287(L01)N
+4283 3643(L1)N
+3485 3501 MXY
+-20 -13 Dl
+7 13 Dl
+-7 13 Dl
+20 -13 Dl
+-155 0 Dl
+3485 3027 MXY
+-20 -13 Dl
+7 13 Dl
+-7 13 Dl
+20 -13 Dl
+-163 0 Dl
+2967 3687 MXY
+-5 -24 Dl
+-4 14 Dl
+-15 4 Dl
+24 6 Dl
+-141 -141 Dl
+3 Dt
+-1 Ds
+8 s
+2706 4033(Figure)N
+2903(2:)X
+1 f
+2972(A)X
+3034(radix)X
+3181(search)X
+3359(trie)X
+3460(and)X
+3568(a)X
+3612(directory)X
+3858(representing)X
+4189(the)X
+4283(trie.)X
+10 s
+10 f
+2706 4209 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+1 f
+2878 4411(In)N
+2968(this)X
+3106(algorithm,)X
+3460(a)X
+3519(directory)X
+3832(consists)X
+4108(of)X
+4198(a)X
+4256(search)X
+2706 4499(trie)N
+2847(of)X
+2947(depth)X
+2 f
+3158(n)X
+1 f
+3211(,)X
+3264(containing)X
+3635(2)X
+2 f
+7 s
+4467(n)Y
+10 s
+1 f
+3749 4499(bucket)N
+3996(addresses)X
+4337(\(i.e.)X
+2706 4587(each)N
+2897(element)X
+3194(of)X
+3304(the)X
+3445(trie)X
+3594(is)X
+3689(a)X
+3767(bucket)X
+4023(address\).)X
+4373(To)X
+2706 4675(access)N
+2935(the)X
+3056(hash)X
+3226(table,)X
+3425(a)X
+3483(32-bit)X
+3696(hash)X
+3865(value)X
+4061(is)X
+4136(calculated)X
+2706 4763(and)N
+2 f
+2861(n)X
+1 f
+2953(bits)X
+3107(of)X
+3213(the)X
+3350(value)X
+3563(are)X
+3701(used)X
+3886(to)X
+3986(index)X
+4202(into)X
+4364(the)X
+2706 4851(directory)N
+3018(to)X
+3102(obtain)X
+3324(a)X
+3382(bucket)X
+3618(address.)X
+3921(It)X
+3992(is)X
+4067(important)X
+4400(to)X
+2706 4939(note)N
+2866(that)X
+3008(multiple)X
+3296(entries)X
+3532(of)X
+3620(this)X
+3756(directory)X
+4067(may)X
+4226(contain)X
+2706 5027(the)N
+2833(same)X
+3026(bucket)X
+3268(address)X
+3537(as)X
+3632(a)X
+3696(result)X
+3902(of)X
+3997(directory)X
+4315(dou-)X
+2706 5115(bling)N
+2903(during)X
+3145(bucket)X
+3392(splitting.)X
+3706(Figure)X
+3948(2)X
+4021(illustrates)X
+4364(the)X
+2706 5203(relationship)N
+3126(between)X
+3436(a)X
+3513(typical)X
+3772(\(skewed\))X
+4108(search)X
+4355(trie)X
+2706 5291(and)N
+2850(its)X
+2953(directory)X
+3271(representation.)X
+3774(The)X
+3927(formation)X
+4270(of)X
+4364(the)X
+2706 5379(directory)N
+3016(shown)X
+3245(in)X
+3327(the)X
+3445(\256gure)X
+3652(is)X
+3725(as)X
+3812(follows.)X
+16 s
+2706 5593 MXY
+864 0 Dl
+2 f
+8 s
+2746 5648(4)N
+1 f
+9 s
+2796 5673(It)N
+2858(does)X
+3008(not)X
+3118(contain)X
+3348(holes.)X
+3 f
+10 s
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+4424(3)X
+
+4 p
+%%Page: 4 4
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+432 258(A)N
+510(New)X
+682(Hashing)X
+985(Package)X
+1290(for)X
+1413(UNIX)X
+3663(Seltzer)X
+3920(&)X
+4007(Yigit)X
+1 f
+604 538(Initially,)N
+937(there)X
+1158(is)X
+1271(one)X
+1446(slot)X
+1620(in)X
+1741(the)X
+1898(directory)X
+432 626(addressing)N
+802(a)X
+865(single)X
+1083(bucket.)X
+1364(The)X
+1515(depth)X
+1719(of)X
+1812(the)X
+1936(trie)X
+2069(is)X
+2148(0)X
+432 714(and)N
+577(0)X
+646(bits)X
+790(of)X
+886(each)X
+1063(hash)X
+1239(value)X
+1442(are)X
+1570(examined)X
+1910(to)X
+2000(deter-)X
+432 802(mine)N
+624(in)X
+718(which)X
+946(bucket)X
+1192(to)X
+1286(place)X
+1488(a)X
+1556(key;)X
+1726(all)X
+1837(keys)X
+2015(go)X
+2126(in)X
+432 890(bucket)N
+682(0.)X
+797(When)X
+1024(this)X
+1174(bucket)X
+1423(is)X
+1511(full,)X
+1677(its)X
+1787(contents)X
+2089(are)X
+432 978(divided)N
+698(between)X
+992(L0)X
+1107(and)X
+1249(L1)X
+1363(as)X
+1455(was)X
+1605(done)X
+1786(in)X
+1873(the)X
+1996(previ-)X
+432 1066(ously)N
+664(discussed)X
+1030(algorithms.)X
+1471(After)X
+1700(this)X
+1874(split,)X
+2090(the)X
+432 1154(address)N
+710(of)X
+814(the)X
+948(second)X
+1207(bucket)X
+1457(must)X
+1648(be)X
+1760(stored)X
+1992(in)X
+2090(the)X
+432 1242(directory.)N
+796(To)X
+939(accommodate)X
+1438(the)X
+1589(new)X
+1776(address,)X
+2090(the)X
+432 1330(directory)N
+752(is)X
+835(split)X
+2 f
+8 s
+972 1305(5)N
+1 f
+10 s
+1330(,)Y
+1054(by)X
+1163(doubling)X
+1476(it,)X
+1569(thus)X
+1731(increasing)X
+2090(the)X
+432 1418(depth)N
+630(of)X
+717(the)X
+835(directory)X
+1145(by)X
+1245(one.)X
+604 1532(After)N
+813(this)X
+967(split,)X
+1163(a)X
+1237(single)X
+1466(bit)X
+1588(of)X
+1693(the)X
+1829(hash)X
+2014(value)X
+432 1620(needs)N
+663(to)X
+773(be)X
+896(examined)X
+1255(to)X
+1364(decide)X
+1621(whether)X
+1927(the)X
+2072(key)X
+432 1708(belongs)N
+711(to)X
+803(L0)X
+922(or)X
+1019(L1.)X
+1158(Once)X
+1358(one)X
+1504(of)X
+1601(these)X
+1795(buckets)X
+2069(\256lls)X
+432 1796(\(L0)N
+578(for)X
+702(example\),)X
+1051(it)X
+1125(is)X
+1208(split)X
+1375(as)X
+1472(before,)X
+1728(and)X
+1873(the)X
+2000(direc-)X
+432 1884(tory)N
+585(is)X
+662(split)X
+823(again)X
+1021(to)X
+1107(make)X
+1305(room)X
+1498(for)X
+1615(the)X
+1736(address)X
+2000(of)X
+2090(the)X
+432 1972(third)N
+618(bucket.)X
+927(This)X
+1104(splitting)X
+1400(causes)X
+1645(the)X
+1778(addresses)X
+2121(of)X
+432 2060(the)N
+567(non-splitting)X
+1012(bucket)X
+1263(\(L1\))X
+1443(to)X
+1541(be)X
+1653(duplicated.)X
+2063(The)X
+432 2148(directory)N
+766(now)X
+948(has)X
+1099(four)X
+1277(entries,)X
+1555(a)X
+1635(depth)X
+1857(of)X
+1968(2,)X
+2072(and)X
+432 2236(indexes)N
+700(the)X
+821(buckets)X
+1089(L00,)X
+1261(L01)X
+1413(and)X
+1552(L1,)X
+1684(as)X
+1774(shown)X
+2006(in)X
+2090(the)X
+432 2324(Figure)N
+661(2.)X
+604 2438(The)N
+756(crucial)X
+1002(part)X
+1154(of)X
+1247(the)X
+1371(algorithm)X
+1708(is)X
+1787(the)X
+1911(observa-)X
+432 2526(tion)N
+580(that)X
+724(L1)X
+837(is)X
+914(addressed)X
+1255(twice)X
+1453(in)X
+1539(the)X
+1661(directory.)X
+1995(If)X
+2073(this)X
+432 2614(bucket)N
+679(were)X
+869(to)X
+964(split)X
+1134(now,)X
+1324(the)X
+1454(directory)X
+1776(already)X
+2045(con-)X
+432 2702(tains)N
+611(room)X
+808(to)X
+898(hold)X
+1067(the)X
+1192(address)X
+1460(of)X
+1554(the)X
+1679(new)X
+1840(bucket.)X
+2121(In)X
+432 2790(general,)N
+711(the)X
+831(relationship)X
+1231(between)X
+1521(the)X
+1641(directory)X
+1953(and)X
+2090(the)X
+432 2878(number)N
+704(of)X
+798(bucket)X
+1039(addresses)X
+1374(contained)X
+1713(therein)X
+1962(is)X
+2041(used)X
+432 2966(to)N
+517(decide)X
+750(when)X
+947(to)X
+1031(split)X
+1190(the)X
+1310(directory.)X
+1662(Each)X
+1845(bucket)X
+2081(has)X
+432 3054(a)N
+505(depth,)X
+740(\()X
+2 f
+767(n)X
+7 s
+3070(b)Y
+10 s
+1 f
+848 3054(\),)N
+932(associated)X
+1299(with)X
+1478(it)X
+1558(and)X
+1710(appears)X
+1992(in)X
+2090(the)X
+432 3142(directory)N
+744(exactly)X
+998(2)X
+2 f
+7 s
+3106(n)Y
+9 f
+1075(-)X
+2 f
+1106(n)X
+4 s
+3110(b)Y
+7 s
+1 f
+10 s
+1181 3142(times.)N
+1396(When)X
+1610(a)X
+1668(bucket)X
+1904(splits,)X
+2113(its)X
+432 3230(depth)N
+638(increases)X
+961(by)X
+1069(one.)X
+1253(The)X
+1406(directory)X
+1724(must)X
+1907(split)X
+2072(any)X
+432 3318(time)N
+602(a)X
+665(bucket's)X
+964(depth)X
+1169(exceeds)X
+1451(the)X
+1576(depth)X
+1781(of)X
+1875(the)X
+2000(direc-)X
+432 3406(tory.)N
+630(The)X
+784(following)X
+1123(code)X
+1303(fragment)X
+1621(helps)X
+1818(to)X
+1908(illustrate)X
+432 3494(the)N
+554(extendible)X
+912(hashing)X
+1185(algorithm)X
+1520([FAG79])X
+1838(for)X
+1955(access-)X
+432 3582(ing)N
+554(individual)X
+898(buckets)X
+1163(and)X
+1299(maintaining)X
+1701(the)X
+1819(directory.)X
+0 f
+8 s
+432 3881(hash)N
+622(=)X
+698 -0.4038(calchash\(key\);)AX
+432 3969(mask)N
+622(=)X
+698 -0.4018(maskvec[depth];)AX
+432 4145(bucket)N
+698(=)X
+774 -0.4038(directory[hash)AX
+1344(&)X
+1420(mask];)X
+432 4321(/*)N
+546(Key)X
+698 -0.4219(Insertion)AX
+1078(*/)X
+432 4409(if)N
+546 -0.4038(\(store\(bucket,)AX
+1116(key,)X
+1306(data\))X
+1534(==)X
+1648(FAIL\))X
+1876({)X
+720 4497(newbl)N
+948(=)X
+1024 -0.4167(getpage\(\);)AX
+720 4585 -0.4000(bucket->depth++;)AN
+720 4673 -0.4091(newbl->depth)AN
+1214(=)X
+1290 -0.4038(bucket->depth;)AX
+720 4761(if)N
+834 -0.4038(\(bucket->depth)AX
+1404(>)X
+1480(depth\))X
+1746({)X
+1008 4849(/*)N
+1122(double)X
+1388 -0.4219(directory)AX
+1768(*/)X
+1008 4937(depth++;)N
+1 f
+16 s
+432 5033 MXY
+864 0 Dl
+2 f
+8 s
+472 5088(5)N
+1 f
+9 s
+534 5113(This)N
+692(decision)X
+962(to)X
+1048(split)X
+1202(the)X
+1319(directory)X
+1608(is)X
+1685(based)X
+1878(on)X
+1979(a)X
+2040(com-)X
+432 5193(parison)N
+666(of)X
+748(the)X
+858(depth)X
+1040(of)X
+1121(the)X
+1230(page)X
+1387(being)X
+1568(split)X
+1713(and)X
+1838(the)X
+1947(depth)X
+2128(of)X
+432 5273(the)N
+543(trie.)X
+698(In)X
+781(Figure)X
+992(2,)X
+1069(the)X
+1180(depths)X
+1390(of)X
+1472(both)X
+1622(L00)X
+1760(and)X
+1886(L01)X
+2024(are)X
+2134(2,)X
+432 5353(whereas)N
+689(the)X
+798(depth)X
+979(of)X
+1060(L1)X
+1161(is)X
+1230(1.)X
+1323(Therefore,)X
+1646(if)X
+1710(L1)X
+1810(were)X
+1970(to)X
+2046(split,)X
+432 5433(the)N
+543(directory)X
+826(would)X
+1029(not)X
+1144(need)X
+1303(to)X
+1382(split.)X
+1565(In)X
+1648(reality,)X
+1872(a)X
+1926(bucket)X
+2140(is)X
+432 5513(allocated)N
+727(for)X
+846(the)X
+969(directory)X
+1264(at)X
+1351(the)X
+1474(time)X
+1637(of)X
+1732(\256le)X
+1858(creation)X
+2124(so)X
+432 5593(although)N
+707(the)X
+818(directory)X
+1100(splits)X
+1274(logically,)X
+1566(physical)X
+1828(splits)X
+2002(do)X
+2096(not)X
+432 5673(occur)N
+610(until)X
+760(the)X
+866(\256le)X
+976(becomes)X
+1246(quite)X
+1408(large.)X
+0 f
+8 s
+2994 538 -0.4219(directory)AN
+3374(=)X
+3450 -0.3971(double\(directory\);)AX
+2706 626(})N
+2706 714 -0.3958(splitbucket\(bucket,)AN
+3466(newbl\))X
+2706 802(...)N
+2418 890(})N
+2 f
+10 s
+3169 1255(hsearch)N
+1 f
+2590 1387(Since)N
+2 f
+2807(hsearch)X
+1 f
+3100(does)X
+3286(not)X
+3427(have)X
+3617(to)X
+3717(translate)X
+4027(hash)X
+2418 1475(values)N
+2659(into)X
+2819(disk)X
+2988(addresses,)X
+3352(it)X
+3432(can)X
+3579(use)X
+3721(much)X
+3934(simpler)X
+2418 1563(algorithms)N
+2808(than)X
+2994(those)X
+3211(de\256ned)X
+3495(above.)X
+3775(System)X
+4058(V's)X
+2 f
+2418 1651(hsearch)N
+1 f
+2708(constructs)X
+3069(a)X
+3141(\256xed-size)X
+3489(hash)X
+3671(table)X
+3862(\(speci\256ed)X
+2418 1739(by)N
+2519(the)X
+2637(user)X
+2791(at)X
+2869(table)X
+3045(creation\).)X
+3391(By)X
+3504(default,)X
+3767(a)X
+3823(multiplica-)X
+2418 1827(tive)N
+2570(hash)X
+2748(function)X
+3046(based)X
+3260(on)X
+3371(that)X
+3522(described)X
+3861(in)X
+3954(Knuth,)X
+2418 1915(Volume)N
+2710(3,)X
+2804(section)X
+3065(6.4)X
+3199([KNU68])X
+3541(is)X
+3628(used)X
+3809(to)X
+3905(obtain)X
+4138(a)X
+2418 2003(primary)N
+2694(bucket)X
+2930(address.)X
+3233(If)X
+3309(this)X
+3446(bucket)X
+3681(is)X
+3755(full,)X
+3907(a)X
+3964(secon-)X
+2418 2091(dary)N
+2593(multiplicative)X
+3069(hash)X
+3248(value)X
+3454(is)X
+3538(computed)X
+3885(to)X
+3978(de\256ne)X
+2418 2179(the)N
+2542(probe)X
+2751(interval.)X
+3062(The)X
+3213(probe)X
+3422(interval)X
+3693(is)X
+3772(added)X
+3989(to)X
+4076(the)X
+2418 2267(original)N
+2712(bucket)X
+2971(address)X
+3257(\(modulo)X
+3573(the)X
+3716(table)X
+3916(size\))X
+4112(to)X
+2418 2355(obtain)N
+2658(a)X
+2734(new)X
+2908(bucket)X
+3162(address.)X
+3483(This)X
+3665(process)X
+3946(repeats)X
+2418 2443(until)N
+2588(an)X
+2688(empty)X
+2911(bucket)X
+3148(is)X
+3224(found.)X
+3474(If)X
+3551(no)X
+3654(bucket)X
+3891(is)X
+3967(found,)X
+2418 2531(an)N
+2514(insertion)X
+2814(fails)X
+2972(with)X
+3134(a)X
+3190(``table)X
+3420(full'')X
+3605(condition.)X
+2590 2645(The)N
+2768(basic)X
+2986(algorithm)X
+3350(may)X
+3541(be)X
+3670(modi\256ed)X
+4006(by)X
+4138(a)X
+2418 2733(number)N
+2705(of)X
+2813(compile)X
+3112(time)X
+3295(options)X
+3571(available)X
+3902(to)X
+4005(those)X
+2418 2821(users)N
+2604(with)X
+2767(AT&T)X
+3006(source)X
+3237(code.)X
+3450(First,)X
+3637(the)X
+3756(package)X
+4040(pro-)X
+2418 2909(vides)N
+2638(two)X
+2809(options)X
+3094(for)X
+3238(hash)X
+3435(functions.)X
+3803(Users)X
+4036(may)X
+2418 2997(specify)N
+2690(their)X
+2877(own)X
+3055(hash)X
+3242(function)X
+3549(by)X
+3669(compiling)X
+4032(with)X
+2418 3085(``USCR'')N
+2757(de\256ned)X
+3016(and)X
+3155(declaring)X
+3477(and)X
+3616(de\256ning)X
+3901(the)X
+4022(vari-)X
+2418 3173(able)N
+2 f
+2578(hcompar)X
+1 f
+2863(,)X
+2909(a)X
+2971(function)X
+3263(taking)X
+3488(two)X
+3633(string)X
+3840(arguments)X
+2418 3261(and)N
+2560(returning)X
+2880(an)X
+2982(integer.)X
+3271(Users)X
+3480(may)X
+3643(also)X
+3797(request)X
+4054(that)X
+2418 3349(hash)N
+2587(values)X
+2814(be)X
+2912(computed)X
+3250(simply)X
+3489(by)X
+3590(taking)X
+3811(the)X
+3930(modulo)X
+2418 3437(of)N
+2521(key)X
+2673(\(using)X
+2909(division)X
+3201(rather)X
+3424(than)X
+3597(multiplication)X
+4080(for)X
+2418 3525(hash)N
+2589(value)X
+2787(calculation\).)X
+3230(If)X
+3308(this)X
+3447(technique)X
+3783(is)X
+3859(used,)X
+4049(col-)X
+2418 3613(lisions)N
+2651(are)X
+2775(resolved)X
+3072(by)X
+3176(scanning)X
+3485(sequentially)X
+3896(from)X
+4076(the)X
+2418 3701(selected)N
+2702(bucket)X
+2941(\(linear)X
+3176(probing\).)X
+3517(This)X
+3684(option)X
+3913(is)X
+3991(avail-)X
+2418 3789(able)N
+2572(by)X
+2672(de\256ning)X
+2954(the)X
+3072(variable)X
+3351(``DIV'')X
+3622(at)X
+3700(compile)X
+3978(time.)X
+2590 3903(A)N
+2720(second)X
+3015(option,)X
+3311(based)X
+3565(on)X
+3716(an)X
+3863(algorithm)X
+2418 3991(discovered)N
+2787(by)X
+2888(Richard)X
+3163(P.)X
+3248(Brent,)X
+3466(rearranges)X
+3822(the)X
+3940(table)X
+4116(at)X
+2418 4079(the)N
+2549(time)X
+2724(of)X
+2824(insertion)X
+3137(in)X
+3232(order)X
+3434(to)X
+3528(speed)X
+3743(up)X
+3855(retrievals.)X
+2418 4167(The)N
+2571(basic)X
+2764(idea)X
+2926(is)X
+3007(to)X
+3097(shorten)X
+3361(long)X
+3531(probe)X
+3741(sequences)X
+4094(by)X
+2418 4255(lengthening)N
+2833(short)X
+3030(probe)X
+3249(sequences.)X
+3651(Once)X
+3857(the)X
+3991(probe)X
+2418 4343(chain)N
+2613(has)X
+2741(exceeded)X
+3062(some)X
+3252(threshold)X
+3571(\(Brent)X
+3796(suggests)X
+4087(2\),)X
+2418 4431(we)N
+2541(attempt)X
+2809(to)X
+2899(shuf\257e)X
+3145(any)X
+3289(colliding)X
+3601(keys)X
+3776(\(keys)X
+3978(which)X
+2418 4519(appeared)N
+2734(in)X
+2821(the)X
+2944(probe)X
+3152(sequence)X
+3471(of)X
+3562(the)X
+3684(new)X
+3842(key\).)X
+4049(The)X
+2418 4607(details)N
+2652(of)X
+2744(this)X
+2884(key)X
+3025(shuf\257ing)X
+3333(can)X
+3469(be)X
+3569(found)X
+3780(in)X
+3866([KNU68])X
+2418 4695(and)N
+2576([BRE73].)X
+2946(This)X
+3129(algorithm)X
+3481(may)X
+3660(be)X
+3777(obtained)X
+4094(by)X
+2418 4783(de\256ning)N
+2700(the)X
+2818(variable)X
+3097(``BRENT'')X
+3487(at)X
+3565(compile)X
+3843(time.)X
+2590 4897(A)N
+2698(third)X
+2899(set)X
+3038(of)X
+3154(options,)X
+3458(obtained)X
+3783(by)X
+3912(de\256ning)X
+2418 4985(``CHAINED'',)N
+2943(use)X
+3086(linked)X
+3321(lists)X
+3484(to)X
+3581(resolve)X
+3848(collisions.)X
+2418 5073(Either)N
+2647(of)X
+2747(the)X
+2878(primary)X
+3164(hash)X
+3343(function)X
+3642(described)X
+3982(above)X
+2418 5161(may)N
+2584(be)X
+2688(used,)X
+2882(but)X
+3011(all)X
+3118(collisions)X
+3451(are)X
+3577(resolved)X
+3876(by)X
+3983(build-)X
+2418 5249(ing)N
+2554(a)X
+2623(linked)X
+2856(list)X
+2986(of)X
+3086(entries)X
+3333(from)X
+3522(the)X
+3653(primary)X
+3940(bucket.)X
+2418 5337(By)N
+2542(default,)X
+2816(new)X
+2981(entries)X
+3226(will)X
+3381(be)X
+3488(added)X
+3711(to)X
+3804(a)X
+3871(bucket)X
+4116(at)X
+2418 5425(the)N
+2541(beginning)X
+2886(of)X
+2978(the)X
+3101(bucket)X
+3339(chain.)X
+3577(However,)X
+3916(compile)X
+2418 5513(options)N
+2706(``SORTUP'')X
+3173(or)X
+3293(``SORTDOWN'')X
+3908(may)X
+4098(be)X
+2418 5601(speci\256ed)N
+2723(to)X
+2805(order)X
+2995(the)X
+3113(hash)X
+3280(chains)X
+3505(within)X
+3729(each)X
+3897(bucket.)X
+3 f
+432 5960(4)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+5 p
+%%Page: 5 5
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+720 258(Seltzer)N
+977(&)X
+1064(Yigit)X
+3278(A)X
+3356(New)X
+3528(Hashing)X
+3831(Package)X
+4136(for)X
+4259(UNIX)X
+2 f
+1444 538(dynahash)N
+1 f
+892 670(The)N
+2 f
+1054(dynahash)X
+1 f
+1398(library,)X
+1669(written)X
+1932(by)X
+2048(Esmond)X
+2346(Pitt,)X
+720 758(implements)N
+1183(Larson's)X
+1554(linear)X
+1827(hashing)X
+2165(algorithm)X
+720 846([LAR88])N
+1097(with)X
+1302(an)X
+2 f
+1440(hsearch)X
+1 f
+1756(compatible)X
+2174(interface.)X
+720 934(Intuitively,)N
+1099(a)X
+1161(hash)X
+1334(table)X
+1516(begins)X
+1751(as)X
+1844(a)X
+1905(single)X
+2121(bucket)X
+2360(and)X
+720 1022(grows)N
+941(in)X
+1028(generations,)X
+1443(where)X
+1665(a)X
+1725(generation)X
+2088(corresponds)X
+720 1110(to)N
+815(a)X
+884(doubling)X
+1201(in)X
+1296(the)X
+1427(size)X
+1585(of)X
+1685(the)X
+1815(hash)X
+1994(table.)X
+2222(The)X
+2379(0)X
+2 f
+7 s
+1078(th)Y
+10 s
+1 f
+720 1198(generation)N
+1085(occurs)X
+1321(as)X
+1414(the)X
+1538(table)X
+1719(grows)X
+1940(from)X
+2121(one)X
+2262(bucket)X
+720 1286(to)N
+814(two.)X
+1006(In)X
+1105(the)X
+1235(next)X
+1405(generation)X
+1776(the)X
+1906(table)X
+2093(grows)X
+2320(from)X
+720 1374(two)N
+862(to)X
+946(four.)X
+1122(During)X
+1371(each)X
+1541(generation,)X
+1921(every)X
+2121(bucket)X
+2356(that)X
+720 1462(existed)N
+967(at)X
+1045(the)X
+1163(beginning)X
+1503(of)X
+1590(the)X
+1708(generation)X
+2067(is)X
+2140(split.)X
+892 1576(The)N
+1041(table)X
+1221(starts)X
+1414(as)X
+1505(a)X
+1565(single)X
+1780(bucket)X
+2018(\(numbered)X
+2389(0\),)X
+720 1664(the)N
+839(current)X
+1088(split)X
+1245(bucket)X
+1479(is)X
+1552(set)X
+1661(to)X
+1743(bucket)X
+1977(0,)X
+2057(and)X
+2193(the)X
+2311(max-)X
+720 1752(imum)N
+933(split)X
+1097(point)X
+1288(is)X
+1368(set)X
+1483(to)X
+1571(twice)X
+1771(the)X
+1895(current)X
+2149(split)X
+2312(point)X
+720 1840(\(0\).)N
+863(When)X
+1084(it)X
+1157(is)X
+1239(time)X
+1410(for)X
+1532(a)X
+1596(bucket)X
+1838(to)X
+1928(split,)X
+2113(the)X
+2239(keys)X
+2414(in)X
+720 1928(the)N
+872(current)X
+1154(split)X
+1345(bucket)X
+1612(are)X
+1764(divided)X
+2057(between)X
+2378(the)X
+720 2016(current)N
+981(split)X
+1151(bucket)X
+1397(and)X
+1545(a)X
+1613(new)X
+1779(bucket)X
+2025(whose)X
+2262(bucket)X
+720 2104(number)N
+1000(is)X
+1088(equal)X
+1297(to)X
+1394(1)X
+1469(+)X
+1549(current)X
+1812(split)X
+1984(bucket)X
+2232(+)X
+2311(max-)X
+720 2192(imum)N
+927(split)X
+1085(point.)X
+1310(We)X
+1442(can)X
+1574(determine)X
+1915(which)X
+2131(keys)X
+2298(move)X
+720 2280(to)N
+807(the)X
+929(new)X
+1087(bucket)X
+1325(by)X
+1429(examining)X
+1791(the)X
+2 f
+1913(n)X
+7 s
+1962 2248(th)N
+10 s
+1 f
+2043 2280(bit)N
+2151(of)X
+2242(a)X
+2302(key's)X
+720 2368(hash)N
+899(value)X
+1105(where)X
+1334(n)X
+1406(is)X
+1491(the)X
+1620(generation)X
+1990(number.)X
+2306(After)X
+720 2456(the)N
+846(bucket)X
+1088(at)X
+1174(the)X
+1300(maximum)X
+1651(split)X
+1815(point)X
+2006(has)X
+2140(been)X
+2319(split,)X
+720 2544(the)N
+839(generation)X
+1198(number)X
+1463(is)X
+1536(incremented,)X
+1973(the)X
+2091(current)X
+2339(split)X
+720 2632(point)N
+908(is)X
+985(set)X
+1098(back)X
+1274(to)X
+1360(zero,)X
+1543(and)X
+1683(the)X
+1805(maximum)X
+2152(split)X
+2312(point)X
+720 2720(is)N
+815(set)X
+946(to)X
+1050(the)X
+1190(number)X
+1477(of)X
+1586(the)X
+1725(last)X
+1877(bucket)X
+2132(in)X
+2235(the)X
+2374(\256le)X
+720 2808(\(which)N
+971(is)X
+1052(equal)X
+1253(to)X
+1342(twice)X
+1543(the)X
+1668(old)X
+1797(maximum)X
+2148(split)X
+2312(point)X
+720 2896(plus)N
+873(1\).)X
+892 3010(To)N
+1031(facilitate)X
+1361(locating)X
+1668(keys,)X
+1884(we)X
+2027(maintain)X
+2356(two)X
+720 3098(masks.)N
+989(The)X
+1143(low)X
+1291(mask)X
+1488(is)X
+1569(equal)X
+1771(to)X
+1861(the)X
+1987(maximum)X
+2339(split)X
+720 3186(bucket)N
+967(and)X
+1116(the)X
+1247(high)X
+1422(mask)X
+1624(is)X
+1710(equal)X
+1917(to)X
+2011(the)X
+2141(next)X
+2311(max-)X
+720 3274(imum)N
+931(split)X
+1093(bucket.)X
+1372(To)X
+1486(locate)X
+1703(a)X
+1764(speci\256c)X
+2033(key,)X
+2193(we)X
+2311(com-)X
+720 3362(pute)N
+881(a)X
+940(32-bit)X
+1154(hash)X
+1324(value)X
+1520(using)X
+1715(a)X
+1773(bit-randomizing)X
+2311(algo-)X
+720 3450(rithm)N
+932(such)X
+1118(as)X
+1224(the)X
+1361(one)X
+1516(described)X
+1862(in)X
+1962([LAR88].)X
+2334(This)X
+720 3538(hash)N
+893(value)X
+1093(is)X
+1172(then)X
+1336(masked)X
+1607(with)X
+1775(the)X
+1898(high)X
+2065(mask.)X
+2299(If)X
+2378(the)X
+720 3626(resulting)N
+1026(number)X
+1297(is)X
+1376(greater)X
+1626(than)X
+1790(the)X
+1913(maximum)X
+2262(bucket)X
+720 3714(in)N
+823(the)X
+962(table)X
+1159(\(current)X
+1455(split)X
+1633(bucket)X
+1888(+)X
+1974(maximum)X
+2339(split)X
+720 3802(point\),)N
+962(the)X
+1091(hash)X
+1269(value)X
+1474(is)X
+1558(masked)X
+1834(with)X
+2007(the)X
+2136(low)X
+2287(mask.)X
+720 3890(In)N
+825(either)X
+1046(case,)X
+1242(the)X
+1377(result)X
+1592(of)X
+1696(the)X
+1831(mask)X
+2037(is)X
+2127(the)X
+2262(bucket)X
+720 3978(number)N
+989(for)X
+1107(the)X
+1229(given)X
+1431(key.)X
+1611(The)X
+1759(algorithm)X
+2093(below)X
+2312(illus-)X
+720 4066(trates)N
+914(this)X
+1049(process.)X
+0 f
+8 s
+720 4365(h)N
+796(=)X
+872 -0.4038(calchash\(key\);)AX
+720 4453(bucket)N
+986(=)X
+1062(h)X
+1138(&)X
+1214 -0.4167(high_mask;)AX
+720 4541(if)N
+834(\()X
+910(bucket)X
+1176(>)X
+1252 -0.4167(max_bucket)AX
+1670(\))X
+1008 4629(bucket)N
+1274(=)X
+1350(h)X
+1426(&)X
+1502 -0.4219(low_mask;)AX
+720 4717 -0.4018(return\(bucket\);)AN
+1 f
+10 s
+892 5042(In)N
+1013(order)X
+1237(to)X
+1353(decide)X
+1617(when)X
+1845(to)X
+1961(split)X
+2152(a)X
+2242(bucket,)X
+2 f
+720 5130(dynahash)N
+1 f
+1050(uses)X
+2 f
+1210(controlled)X
+1561(splitting)X
+1 f
+1822(.)X
+1884(A)X
+1964(hash)X
+2133(table)X
+2311(has)X
+2440(a)X
+720 5218(\256ll)N
+837(factor)X
+1054(which)X
+1279(is)X
+1361(expressed)X
+1707(in)X
+1798(terms)X
+2004(of)X
+2099(the)X
+2225(average)X
+720 5306(number)N
+990(of)X
+1082(keys)X
+1253(in)X
+1339(each)X
+1511(bucket.)X
+1789(Each)X
+1974(time)X
+2140(the)X
+2262(table's)X
+720 5394(total)N
+885(number)X
+1153(of)X
+1243(keys)X
+1413(divided)X
+1676(by)X
+1778(its)X
+1875(number)X
+2142(of)X
+2231(buckets)X
+720 5482(exceeds)N
+995(this)X
+1130(\256ll)X
+1238(factor,)X
+1466(a)X
+1522(bucket)X
+1756(is)X
+1829(split.)X
+2878 538(Since)N
+3079(the)X
+2 f
+3200(hsearch)X
+1 f
+3477(create)X
+3693(interface)X
+3998(\()X
+2 f
+4025(hcreate)X
+1 f
+4266(\))X
+4315(calls)X
+2706 626(for)N
+2842(an)X
+2960(estimate)X
+3269(of)X
+3378(the)X
+3518(\256nal)X
+3702(size)X
+3869(of)X
+3978(the)X
+4118(hash)X
+4306(table)X
+2706 714(\()N
+2 f
+2733(nelem)X
+1 f
+2925(\),)X
+2 f
+3007(dynahash)X
+1 f
+3349(uses)X
+3522(this)X
+3672(information)X
+4085(to)X
+4182(initialize)X
+2706 802(the)N
+2848(table.)X
+3088(The)X
+3257(initial)X
+3486(number)X
+3774(of)X
+3884(buckets)X
+4172(is)X
+4268(set)X
+4400(to)X
+2 f
+2706 890(nelem)N
+1 f
+2926(rounded)X
+3217(to)X
+3306(the)X
+3431(next)X
+3596(higher)X
+3828(power)X
+4056(of)X
+4150(two.)X
+4337(The)X
+2706 978(current)N
+2958(split)X
+3118(point)X
+3305(is)X
+3381(set)X
+3493(to)X
+3578(0)X
+3641(and)X
+3780(the)X
+3901(maximum)X
+4248(bucket)X
+2706 1066(and)N
+2842(maximum)X
+3186(split)X
+3343(point)X
+3527(are)X
+3646(set)X
+3755(to)X
+3837(this)X
+3972(rounded)X
+4255(value.)X
+3 f
+3148 1220(The)N
+3301(New)X
+3473(Implementation)X
+1 f
+2878 1352(Our)N
+3042(implementation)X
+3583(is)X
+3675(also)X
+3842(based)X
+4063(on)X
+4181(Larson's)X
+2706 1440(linear)N
+2939(hashing)X
+3238([LAR88])X
+3582(algorithm)X
+3943(as)X
+4060(well)X
+4248(as)X
+4364(the)X
+2 f
+2706 1528(dynahash)N
+1 f
+3047(implementation.)X
+3623(The)X
+2 f
+3782(dbm)X
+1 f
+3954(family)X
+4197(of)X
+4297(algo-)X
+2706 1616(rithms)N
+2942(decide)X
+3184(dynamically)X
+3612(which)X
+3840(bucket)X
+4085(to)X
+4178(split)X
+4346(and)X
+2706 1704(when)N
+2914(to)X
+3010(split)X
+3180(it)X
+3257(\(when)X
+3491(it)X
+3568(over\257ows\))X
+3944(while)X
+2 f
+4155(dynahash)X
+1 f
+2706 1792(splits)N
+2933(in)X
+3054(a)X
+3149(prede\256ned)X
+3547(order)X
+3776(\(linearly\))X
+4134(and)X
+4309(at)X
+4426(a)X
+2706 1880(prede\256ned)N
+3116(time)X
+3328(\(when)X
+3599(the)X
+3767(table)X
+3993(\256ll)X
+4151(factor)X
+4409(is)X
+2706 1968(exceeded\).)N
+3121(We)X
+3280(use)X
+3434(a)X
+3517(hybrid)X
+3773(of)X
+3887(these)X
+4099(techniques.)X
+2706 2056(Splits)N
+2913(occur)X
+3118(in)X
+3206(the)X
+3330(prede\256ned)X
+3695(order)X
+3891(of)X
+3984(linear)X
+4193(hashing,)X
+2706 2144(but)N
+2845(the)X
+2980(time)X
+3159(at)X
+3253(which)X
+3485(pages)X
+3704(are)X
+3839(split)X
+4012(is)X
+4101(determined)X
+2706 2232(both)N
+2869(by)X
+2970(page)X
+3143(over\257ows)X
+3480(\()X
+2 f
+3507(uncontrolled)X
+3937(splitting)X
+1 f
+4198(\))X
+4246(and)X
+4382(by)X
+2706 2320(exceeding)N
+3052(the)X
+3170(\256ll)X
+3278(factor)X
+3486(\()X
+2 f
+3513(controlled)X
+3862(splitting)X
+1 f
+4123(\))X
+2878 2434(A)N
+2962(hash)X
+3135(table)X
+3317(is)X
+3395(parameterized)X
+3876(by)X
+3981(both)X
+4148(its)X
+4248(bucket)X
+2706 2522(size)N
+2904(\()X
+2 f
+2931(bsize)X
+1 f
+(\))S
+3191(and)X
+3380(\256ll)X
+3541(factor)X
+3801(\()X
+2 f
+3828(ffactor)X
+1 f
+4041(\).)X
+4180(Whereas)X
+2 f
+2706 2610(dynahash's)N
+1 f
+3095(buckets)X
+3364(can)X
+3500(be)X
+3599(represented)X
+3993(as)X
+4083(a)X
+4142(linked)X
+4365(list)X
+2706 2698(of)N
+2798(elements)X
+3108(in)X
+3195(memory,)X
+3507(our)X
+3639(package)X
+3928(needs)X
+4136(to)X
+4222(support)X
+2706 2786(disk)N
+2874(access,)X
+3135(and)X
+3286(must)X
+3476(represent)X
+3806(buckets)X
+4086(in)X
+4183(terms)X
+4395(of)X
+2706 2874(pages.)N
+2955(The)X
+2 f
+3106(bsize)X
+1 f
+3291(is)X
+3369(the)X
+3492(size)X
+3642(\(in)X
+3756(bytes\))X
+3977(of)X
+4069(these)X
+4259(pages.)X
+2706 2962(As)N
+2833(in)X
+2933(linear)X
+3154(hashing,)X
+3461(the)X
+3597(number)X
+3879(of)X
+3983(buckets)X
+4265(in)X
+4364(the)X
+2706 3050(table)N
+2906(is)X
+3003(equal)X
+3221(to)X
+3327(the)X
+3469(number)X
+3758(of)X
+3869(keys)X
+4060(in)X
+4165(the)X
+4306(table)X
+2706 3138(divided)N
+2988(by)X
+2 f
+3110(ffactor)X
+1 f
+3323(.)X
+2 f
+8 s
+3113(6)Y
+1 f
+10 s
+3417 3138(The)N
+3584(controlled)X
+3950(splitting)X
+4252(occurs)X
+2706 3226(each)N
+2878(time)X
+3044(the)X
+3166(number)X
+3435(of)X
+3526(keys)X
+3697(in)X
+3783(the)X
+3905(table)X
+4085(exceeds)X
+4364(the)X
+2706 3314(\256ll)N
+2814(factor)X
+3022(multiplied)X
+3370(by)X
+3470(the)X
+3588(number)X
+3853(of)X
+3940(buckets.)X
+2878 3428(Inserting)N
+3187(keys)X
+3358(and)X
+3498(splitting)X
+3783(buckets)X
+4051(is)X
+4127(performed)X
+2706 3516(precisely)N
+3018(as)X
+3107(described)X
+3437(previously)X
+3796(for)X
+2 f
+3911(dynahash)X
+1 f
+4218(.)X
+4279(How-)X
+2706 3604(ever,)N
+2897(since)X
+3094(buckets)X
+3371(are)X
+3502(now)X
+3671(comprised)X
+4036(of)X
+4134(pages,)X
+4368(we)X
+2706 3692(must)N
+2883(be)X
+2981(prepared)X
+3284(to)X
+3367(handle)X
+3602(cases)X
+3793(where)X
+4011(the)X
+4130(size)X
+4276(of)X
+4364(the)X
+2706 3780(keys)N
+2873(and)X
+3009(data)X
+3163(in)X
+3245(a)X
+3301(bucket)X
+3535(exceed)X
+3779(the)X
+3897(bucket)X
+4131(size.)X
+3 f
+3318 3934(Over\257ow)N
+3654(Pages)X
+1 f
+2878 4066(There)N
+3095(are)X
+3223(two)X
+3372(cases)X
+3571(where)X
+3797(a)X
+3862(key)X
+4007(may)X
+4174(not)X
+4305(\256t)X
+4400(in)X
+2706 4154(its)N
+2802(designated)X
+3166(bucket.)X
+3441(In)X
+3529(the)X
+3647(\256rst)X
+3791(case,)X
+3970(the)X
+4088(total)X
+4250(size)X
+4395(of)X
+2706 4242(the)N
+2833(key)X
+2978(and)X
+3123(data)X
+3286(may)X
+3453(exceed)X
+3706(the)X
+3833(bucket)X
+4076(size.)X
+4269(In)X
+4364(the)X
+2706 4330(second,)N
+3008(addition)X
+3328(of)X
+3453(a)X
+3547(new)X
+3739(key)X
+3913(could)X
+4149(cause)X
+4386(an)X
+2706 4418(over\257ow,)N
+3068(but)X
+3227(the)X
+3382(bucket)X
+3652(in)X
+3770(question)X
+4097(is)X
+4206(not)X
+4364(yet)X
+2706 4506(scheduled)N
+3049(to)X
+3133(be)X
+3230(split.)X
+3428(In)X
+3516(existing)X
+3790(implementations,)X
+4364(the)X
+2706 4594(second)N
+2953(case)X
+3115(never)X
+3317(arises)X
+3523(\(since)X
+3738(buckets)X
+4006(are)X
+4128(split)X
+4288(when)X
+2706 4682(they)N
+2871(over\257ow\))X
+3210(and)X
+3352(the)X
+3476(\256rst)X
+3626(case)X
+3791(is)X
+3870(not)X
+3998(handled)X
+4278(at)X
+4362(all.)X
+2706 4770(Although)N
+3036(large)X
+3225(key/data)X
+3525(pair)X
+3678(handling)X
+3986(is)X
+4066(dif\256cult)X
+4346(and)X
+2706 4858(expensive,)N
+3083(it)X
+3163(is)X
+3252(essential.)X
+3604(In)X
+3706(a)X
+3777(linear)X
+3995(hashed)X
+4253(imple-)X
+2706 4946(mentation,)N
+3087(over\257ow)X
+3413(pages)X
+3636(are)X
+3775(required)X
+4083(for)X
+4217(buckets)X
+2706 5034(which)N
+2935(over\257ow)X
+3253(before)X
+3492(they)X
+3662(are)X
+3793(split,)X
+3982(so)X
+4085(we)X
+4211(can)X
+4355(use)X
+2706 5122(the)N
+2833(same)X
+3027(mechanism)X
+3421(for)X
+3544(large)X
+3734(key/data)X
+4035(pairs)X
+4220(that)X
+4368(we)X
+2706 5210(use)N
+2837(for)X
+2955(over\257ow)X
+3264(pages.)X
+3511(Logically,)X
+3862(we)X
+3980(chain)X
+4177(over\257ow)X
+16 s
+2706 5353 MXY
+864 0 Dl
+2 f
+8 s
+2746 5408(6)N
+1 f
+9 s
+2801 5433(This)N
+2952(is)X
+3023(not)X
+3138(strictly)X
+3361(true.)X
+3532(The)X
+3667(\256le)X
+3782(does)X
+3937(not)X
+4052(contract)X
+4306(when)X
+2706 5513(keys)N
+2861(are)X
+2972(deleted,)X
+3221(so)X
+3308(the)X
+3419(number)X
+3662(of)X
+3744(buckets)X
+3986(is)X
+4056(actually)X
+4306(equal)X
+2706 5593(to)N
+2782(the)X
+2890(maximum)X
+3202(number)X
+3441(of)X
+3520(keys)X
+3671(ever)X
+3814(present)X
+4041(in)X
+4116(the)X
+4223(table)X
+4382(di-)X
+2706 5673(vided)N
+2884(by)X
+2974(the)X
+3080(\256ll)X
+3178(factor.)X
+3 f
+10 s
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+4424(5)X
+
+6 p
+%%Page: 6 6
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+432 258(A)N
+510(New)X
+682(Hashing)X
+985(Package)X
+1290(for)X
+1413(UNIX)X
+3663(Seltzer)X
+3920(&)X
+4007(Yigit)X
+1 f
+432 538(pages)N
+639(to)X
+725(the)X
+847(buckets)X
+1116(\(also)X
+1296(called)X
+1512(primary)X
+1789(pages\).)X
+2062(In)X
+2152(a)X
+432 626(memory)N
+730(based)X
+943(representation,)X
+1448(over\257ow)X
+1763(pages)X
+1976(do)X
+2086(not)X
+432 714(pose)N
+628(any)X
+792(special)X
+1063(problems)X
+1409(because)X
+1712(we)X
+1854(can)X
+2014(chain)X
+432 802(over\257ow)N
+776(pages)X
+1017(to)X
+1137(primary)X
+1449(pages)X
+1690(using)X
+1921(memory)X
+432 890(pointers.)N
+776(However,)X
+1137(mapping)X
+1463(these)X
+1674(over\257ow)X
+2005(pages)X
+432 978(into)N
+584(a)X
+648(disk)X
+809(\256le)X
+939(is)X
+1019(more)X
+1211(of)X
+1305(a)X
+1368(challenge,)X
+1723(since)X
+1915(we)X
+2036(need)X
+432 1066(to)N
+547(be)X
+675(able)X
+861(to)X
+975(address)X
+1268(both)X
+1462(bucket)X
+1728(pages,)X
+1983(whose)X
+432 1154(numbers)N
+729(are)X
+849(growing)X
+1137(linearly,)X
+1422(and)X
+1558(some)X
+1747(indeterminate)X
+432 1242(number)N
+715(of)X
+820(over\257ow)X
+1143(pages)X
+1364(without)X
+1646(reorganizing)X
+2090(the)X
+432 1330(\256le.)N
+604 1444(One)N
+789(simple)X
+1053(solution)X
+1361(would)X
+1612(be)X
+1739(to)X
+1852(allocate)X
+2152(a)X
+432 1532(separate)N
+737(\256le)X
+880(for)X
+1015(over\257ow)X
+1341(pages.)X
+1604(The)X
+1769(disadvantage)X
+432 1620(with)N
+605(such)X
+783(a)X
+850(technique)X
+1193(is)X
+1276(that)X
+1426(it)X
+1500(requires)X
+1789(an)X
+1895(extra)X
+2086(\256le)X
+432 1708(descriptor,)N
+794(an)X
+891(extra)X
+1073(system)X
+1316(call)X
+1453(on)X
+1554(open)X
+1731(and)X
+1867(close,)X
+2072(and)X
+432 1796(logically)N
+739(associating)X
+1122(two)X
+1269(independent)X
+1687(\256les.)X
+1886(For)X
+2023(these)X
+432 1884(reasons,)N
+728(we)X
+857(wanted)X
+1123(to)X
+1219(map)X
+1391(both)X
+1567(primary)X
+1855(pages)X
+2072(and)X
+432 1972(over\257ow)N
+737(pages)X
+940(into)X
+1084(the)X
+1202(same)X
+1387(\256le)X
+1509(space.)X
+604 2086(The)N
+799(buddy-in-waiting)X
+1425(algorithm)X
+1806(provides)X
+2152(a)X
+432 2174(mechanism)N
+851(to)X
+966(support)X
+1259(multiple)X
+1578(pages)X
+1814(per)X
+1970(logical)X
+432 2262(bucket)N
+685(while)X
+902(retaining)X
+1226(the)X
+1362(simple)X
+1613(split)X
+1788(sequence)X
+2121(of)X
+432 2350(linear)N
+681(hashing.)X
+1015(Over\257ow)X
+1383(pages)X
+1631(are)X
+1795(preallocated)X
+432 2438(between)N
+781(generations)X
+1232(of)X
+1379(primary)X
+1713(pages.)X
+1996(These)X
+432 2526(over\257ow)N
+759(pages)X
+984(are)X
+1125(used)X
+1314(by)X
+1436(any)X
+1594(bucket)X
+1850(containing)X
+432 2614(more)N
+646(keys)X
+842(than)X
+1029(\256t)X
+1144(on)X
+1273(the)X
+1420(primary)X
+1723(page)X
+1924(and)X
+2089(are)X
+432 2702(reclaimed,)N
+808(if)X
+896(possible,)X
+1217(when)X
+1430(the)X
+1567(bucket)X
+1819(later)X
+2000(splits.)X
+432 2790(Figure)N
+687(3)X
+773(depicts)X
+1045(the)X
+1188(layout)X
+1433(of)X
+1545(primary)X
+1844(pages)X
+2072(and)X
+432 2878(over\257ow)N
+752(pages)X
+970(within)X
+1209(the)X
+1342(same)X
+1542(\256le.)X
+1699(Over\257ow)X
+2036(page)X
+432 2966(use)N
+586(information)X
+1011(is)X
+1111(recorded)X
+1440(in)X
+1548(bitmaps)X
+1847(which)X
+2089(are)X
+432 3054(themselves)N
+819(stored)X
+1046(on)X
+1157(over\257ow)X
+1472(pages.)X
+1725(The)X
+1880(addresses)X
+432 3142(of)N
+520(the)X
+639(bitmap)X
+882(pages)X
+1086(and)X
+1223(the)X
+1342(number)X
+1608(of)X
+1695(pages)X
+1898(allocated)X
+432 3230(at)N
+515(each)X
+688(split)X
+850(point)X
+1039(are)X
+1163(stored)X
+1384(in)X
+1470(the)X
+1592(\256le)X
+1718(header.)X
+1997(Using)X
+432 3318(this)N
+577(information,)X
+1005(both)X
+1177(over\257ow)X
+1492(addresses)X
+1829(and)X
+1974(bucket)X
+432 3406(addresses)N
+764(can)X
+900(be)X
+999(mapped)X
+1276(to)X
+1361(disk)X
+1517(addresses)X
+1848(by)X
+1951(the)X
+2072(fol-)X
+432 3494(lowing)N
+674(calculation:)X
+0 f
+8 s
+432 3793(int)N
+736(bucket;)X
+1192(/*)X
+1306(bucket)X
+1572(address)X
+1876(*/)X
+432 3881(u_short)N
+736(oaddr;)X
+1192(/*)X
+1306(OVERFLOW)X
+1648(address)X
+1952(*/)X
+432 3969(int)N
+736 -0.4125(nhdr_pages;)AX
+1192(/*)X
+1306(npages)X
+1572(in)X
+1686 -112.4062(\256le)AX
+1838(header)X
+2104(*/)X
+432 4057(int)N
+736 -0.4125(spares[32];)AX
+1192(/*)X
+1306(npages)X
+1572(at)X
+1686(each)X
+1876(split)X
+2104(*/)X
+432 4145(int)N
+736(log2\(\);)X
+1198(/*)X
+1312(ceil\(log)X
+1654(base)X
+1844(2\))X
+1958(*/)X
+432 4321(#DEFINE)N
+736 -0.3929(BUCKET_TO_PAGE\(bucket\))AX
+1610(\\)X
+584 4409(bucket)N
+850(+)X
+926 -0.4167(nhdr_pages)AX
+1344(+)X
+1420(\\)X
+584 4497 -0.3894(\(bucket?spares[logs2\(bucket)AN
+1648(+)X
+1724(1\)-1]:0\))X
+432 4673(#DEFINE)N
+736 -0.3947(OADDR_TO_PAGE\(oaddr\))AX
+1534(\\)X
+584 4761 -0.3984(BUCKET_TO_PAGE\(\(1)AN
+1268(<<)X
+1382 -0.4091(\(oaddr>>11\)\))AX
+1876(-)X
+1952(1\))X
+2066(+)X
+2142(\\)X
+584 4849(oaddr)N
+812(&)X
+888(0x7ff;)X
+1 f
+10 s
+604 5262(An)N
+728(over\257ow)X
+1039(page)X
+1217(is)X
+1295(addressed)X
+1637(by)X
+1742(its)X
+1842(split)X
+2004(point,)X
+432 5350(identifying)N
+858(the)X
+1031(generations)X
+1476(between)X
+1819(which)X
+2090(the)X
+432 5438(over\257ow)N
+740(page)X
+915(is)X
+991(allocated,)X
+1324(and)X
+1463(its)X
+1561(page)X
+1736(number,)X
+2023(iden-)X
+432 5526(tifying)N
+665(the)X
+783(particular)X
+1111(page)X
+1283(within)X
+1507(the)X
+1625(split)X
+1782(point.)X
+1986(In)X
+2073(this)X
+432 5614(implementation,)N
+983(offsets)X
+1225(within)X
+1457(pages)X
+1668(are)X
+1795(16)X
+1903(bits)X
+2046(long)X
+432 5702(\(limiting)N
+732(the)X
+851(maximum)X
+1196(page)X
+1368(size)X
+1513(to)X
+1595(32K\),)X
+1800(so)X
+1891(we)X
+2005(select)X
+2418 538(an)N
+2535(over\257ow)X
+2860(page)X
+3052(addressing)X
+3435(algorithm)X
+3786(that)X
+3946(can)X
+4098(be)X
+2418 626(expressed)N
+2760(in)X
+2847(16)X
+2952(bits)X
+3091(and)X
+3231(which)X
+3451(allows)X
+3684(quick)X
+3886(retrieval.)X
+2418 714(The)N
+2568(top)X
+2695(\256ve)X
+2840(bits)X
+2980(indicate)X
+3258(the)X
+3380(split)X
+3541(point)X
+3729(and)X
+3869(the)X
+3991(lower)X
+2418 802(eleven)N
+2650(indicate)X
+2926(the)X
+3046(page)X
+3220(number)X
+3487(within)X
+3713(the)X
+3832(split)X
+3990(point.)X
+2418 890(Since)N
+2633(\256ve)X
+2789(bits)X
+2940(are)X
+3075(reserved)X
+3384(for)X
+3514(the)X
+3648(split)X
+3821(point,)X
+4041(\256les)X
+2418 978(may)N
+2578(split)X
+2737(32)X
+2839(times)X
+3034(yielding)X
+3318(a)X
+3376(maximum)X
+3721(\256le)X
+3844(size)X
+3990(of)X
+4078(2)X
+7 s
+946(32)Y
+10 s
+2418 1066(buckets)N
+2698(and)X
+2849(32)X
+2 f
+(*)S
+1 f
+2982(2)X
+7 s
+1034(11)Y
+10 s
+3113 1066(over\257ow)N
+3433(pages.)X
+3691(The)X
+3850(maximum)X
+2418 1154(page)N
+2597(size)X
+2749(is)X
+2829(2)X
+7 s
+1122(15)Y
+10 s
+1154(,)Y
+2971(yielding)X
+3259(a)X
+3321(maximum)X
+3671(\256le)X
+3799(size)X
+3950(greater)X
+2418 1242(than)N
+2601(131,000)X
+2906(GB)X
+3061(\(on)X
+3212(\256le)X
+3358(systems)X
+3655(supporting)X
+4041(\256les)X
+2418 1330(larger)N
+2626(than)X
+2784(4GB\).)X
+10 f
+2418 1418 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+1 Dt
+4014 2275 MXY
+0 133 Dl
+3881 2275 MXY
+0 133 Dl
+3748 2275 MXY
+0 133 Dl
+3083 2275 MXY
+0 133 Dl
+5 s
+1 f
+3523 2475(2/3)N
+3390(2/2)X
+3257(2/1)X
+2859(1/2)X
+2726(1/1)X
+5 Dt
+3814 1743 MXY
+0 133 Dl
+3282 1743 MXY
+0 133 Dl
+3017 1743 MXY
+0 133 Dl
+2884 1743 MXY
+0 133 Dl
+1 Dt
+3681 1743 MXY
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3548 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3415 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3282 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3150 MX
+0 133 Dl
+132 0 Dl
+0 -133 Dl
+-132 0 Dl
+3017 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+2884 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3 f
+8 s
+3017 2601(Over\257ow)N
+3285(Addresses)X
+3515 2833(Over\257ow)N
+3783(Pages)X
+2850(Buckets)X
+1 Di
+3349 2740 MXY
+ 3349 2740 lineto
+ 3482 2740 lineto
+ 3482 2873 lineto
+ 3349 2873 lineto
+ 3349 2740 lineto
+closepath 3 3349 2740 3482 2873 Dp
+2684 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+5 Dt
+4146 2275 MXY
+0 133 Dl
+3216 2275 MXY
+0 133 Dl
+2684 2275 MXY
+0 133 Dl
+2551 2275 MXY
+0 133 Dl
+1 f
+3798 1963(3)N
+3266 1980(2)N
+3001(1)X
+2868(0)X
+1 Dt
+2751 1743 MXY
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3548 2275 MXY
+-15 -22 Dl
+2 16 Dl
+-13 11 Dl
+26 -5 Dl
+-282 -117 Dl
+3432 2275 MXY
+-10 -25 Dl
+-2 16 Dl
+-15 8 Dl
+27 1 Dl
+-166 -117 Dl
+3282 2275 MXY
+12 -25 Dl
+-14 10 Dl
+-15 -6 Dl
+17 21 Dl
+-16 -117 Dl
+2884 2275 MXY
+26 7 Dl
+-12 -12 Dl
+3 -16 Dl
+-17 21 Dl
+382 -117 Dl
+2751 2275 MXY
+25 9 Dl
+-11 -12 Dl
+5 -17 Dl
+-19 20 Dl
+515 -117 Dl
+3 f
+3070 2152(Over\257ow)N
+3338(Pages)X
+3482 2275 MXY
+ 3482 2275 lineto
+ 3615 2275 lineto
+ 3615 2408 lineto
+ 3482 2408 lineto
+ 3482 2275 lineto
+closepath 3 3482 2275 3615 2408 Dp
+3349 MX
+ 3349 2275 lineto
+ 3482 2275 lineto
+ 3482 2408 lineto
+ 3349 2408 lineto
+ 3349 2275 lineto
+closepath 3 3349 2275 3482 2408 Dp
+3216 MX
+ 3216 2275 lineto
+ 3349 2275 lineto
+ 3349 2408 lineto
+ 3216 2408 lineto
+ 3216 2275 lineto
+closepath 3 3216 2275 3349 2408 Dp
+2817 MX
+ 2817 2275 lineto
+ 2950 2275 lineto
+ 2950 2408 lineto
+ 2817 2408 lineto
+ 2817 2275 lineto
+closepath 3 2817 2275 2950 2408 Dp
+2684 MX
+ 2684 2275 lineto
+ 2817 2275 lineto
+ 2817 2408 lineto
+ 2684 2408 lineto
+ 2684 2275 lineto
+closepath 3 2684 2275 2817 2408 Dp
+3615 MX
+0 133 Dl
+531 0 Dl
+0 -133 Dl
+-531 0 Dl
+2950 MX
+0 133 Dl
+266 0 Dl
+0 -133 Dl
+-266 0 Dl
+2551 MX
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3798 1726 MXY
+-21 -18 Dl
+6 16 Dl
+-10 13 Dl
+25 -11 Dl
+-599 -99 Dl
+3266 1726 MXY
+-1 -27 Dl
+-7 15 Dl
+-17 1 Dl
+25 11 Dl
+-67 -99 Dl
+3033 1726 MXY
+27 1 Dl
+-14 -8 Dl
+-1 -17 Dl
+-12 24 Dl
+166 -99 Dl
+2900 1726 MXY
+27 7 Dl
+-13 -11 Dl
+3 -17 Dl
+-17 21 Dl
+299 -99 Dl
+3058 1621(Split)N
+3203(Points)X
+2418 2275 MXY
+0 133 Dl
+133 0 Dl
+0 -133 Dl
+-133 0 Dl
+3 Dt
+-1 Ds
+3137(Figure)Y
+2619(3:)X
+1 f
+2691(Split)X
+2832(points)X
+3008(occur)X
+3168(between)X
+3399(generations)X
+3712(and)X
+3823(are)X
+3919(numbered)X
+2418 3225(from)N
+2560(0.)X
+2642(In)X
+2713(this)X
+2824(\256gure)X
+2991(there)X
+3136(are)X
+3231(two)X
+3345(over\257ow)X
+3590(pages)X
+3753(allocated)X
+4000(at)X
+4063(split)X
+2418 3313(point)N
+2566(1)X
+2614(and)X
+2722(three)X
+2865(allocated)X
+3111(at)X
+3173(split)X
+3300(point)X
+3448(2.)X
+10 s
+10 f
+2418 3489 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+2949 3731(Buffer)N
+3192(Management)X
+1 f
+2590 3863(The)N
+2744(hash)X
+2920(table)X
+3105(is)X
+3187(stored)X
+3412(in)X
+3502(memory)X
+3797(as)X
+3892(a)X
+3956(logical)X
+2418 3951(array)N
+2633(of)X
+2749(bucket)X
+3012(pointers.)X
+3359(Physically,)X
+3761(the)X
+3907(array)X
+4121(is)X
+2418 4039(arranged)N
+2728(in)X
+2818(segments)X
+3144(of)X
+3239(256)X
+3387(pointers.)X
+3713(Initially,)X
+4013(there)X
+2418 4127(is)N
+2530(space)X
+2767(to)X
+2887(allocate)X
+3195(256)X
+3373(segments.)X
+3769(Reallocation)X
+2418 4215(occurs)N
+2651(when)X
+2847(the)X
+2967(number)X
+3234(of)X
+3323(buckets)X
+3590(exceeds)X
+3867(32K)X
+4027(\(256)X
+2418 4303(*)N
+2508(256\).)X
+2745(Primary)X
+3053(pages)X
+3286(may)X
+3473(be)X
+3598(accessed)X
+3929(directly)X
+2418 4391(through)N
+2711(the)X
+2853(array)X
+3062(by)X
+3185(bucket)X
+3442(number)X
+3730(and)X
+3889(over\257ow)X
+2418 4479(pages)N
+2628(are)X
+2754 0.4028(referenced)AX
+3122(logically)X
+3429(by)X
+3536(their)X
+3710(over\257ow)X
+4022(page)X
+2418 4567(address.)N
+2726(For)X
+2864(small)X
+3063(hash)X
+3236(tables,)X
+3469(it)X
+3539(is)X
+3618(desirable)X
+3934(to)X
+4022(keep)X
+2418 4655(all)N
+2525(pages)X
+2735(in)X
+2823(main)X
+3009(memory)X
+3302(while)X
+3506(on)X
+3612(larger)X
+3826(tables,)X
+4059(this)X
+2418 4743(is)N
+2523(probably)X
+2860(impossible.)X
+3298(To)X
+3438(satisfy)X
+3698(both)X
+3891(of)X
+4009(these)X
+2418 4831(requirements,)N
+2900(the)X
+3041(package)X
+3348(includes)X
+3658(buffer)X
+3897(manage-)X
+2418 4919(ment)N
+2598(with)X
+2760(LRU)X
+2940(\(least)X
+3134(recently)X
+3413(used\))X
+3607(replacement.)X
+2590 5033(By)N
+2730(default,)X
+3020(the)X
+3165(package)X
+3475(allocates)X
+3802(up)X
+3928(to)X
+4036(64K)X
+2418 5121(bytes)N
+2616(of)X
+2712(buffered)X
+3014(pages.)X
+3246(All)X
+3377(pages)X
+3589(in)X
+3680(the)X
+3807(buffer)X
+4032(pool)X
+2418 5209(are)N
+2542(linked)X
+2766(in)X
+2852(LRU)X
+3036(order)X
+3230(to)X
+3316(facilitate)X
+3621(fast)X
+3761(replacement.)X
+2418 5297(Whereas)N
+2724(ef\256cient)X
+3011(access)X
+3241(to)X
+3327(primary)X
+3605(pages)X
+3812(is)X
+3889(provided)X
+2418 5385(by)N
+2521(the)X
+2642(bucket)X
+2879(array,)X
+3087(ef\256cient)X
+3372(access)X
+3600(to)X
+3684(over\257ow)X
+3991(pages)X
+2418 5473(is)N
+2501(provided)X
+2816(by)X
+2926(linking)X
+3182(over\257ow)X
+3497(page)X
+3679(buffers)X
+3936(to)X
+4027(their)X
+2418 5561(predecessor)N
+2827(page)X
+3008(\(either)X
+3247(the)X
+3374(primary)X
+3657(page)X
+3838(or)X
+3933(another)X
+2418 5649(over\257ow)N
+2742(page\).)X
+3000(This)X
+3181(means)X
+3425(that)X
+3584(an)X
+3699(over\257ow)X
+4022(page)X
+3 f
+432 5960(6)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+7 p
+%%Page: 7 7
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+720 258(Seltzer)N
+977(&)X
+1064(Yigit)X
+3278(A)X
+3356(New)X
+3528(Hashing)X
+3831(Package)X
+4136(for)X
+4259(UNIX)X
+1 f
+720 538(cannot)N
+955(be)X
+1052(present)X
+1305(in)X
+1388(the)X
+1507(buffer)X
+1724(pool)X
+1886(if)X
+1955(its)X
+2050(primary)X
+2324(page)X
+720 626(is)N
+804(not)X
+937(present.)X
+1240(This)X
+1413(does)X
+1591(not)X
+1724(impact)X
+1972(performance)X
+2409(or)X
+720 714(functionality,)N
+1209(because)X
+1524(an)X
+1660(over\257ow)X
+2005(page)X
+2217(will)X
+2400(be)X
+720 802(accessed)N
+1048(only)X
+1236(after)X
+1430(its)X
+1550(predecessor)X
+1975(page)X
+2172(has)X
+2324(been)X
+720 890(accessed.)N
+1068(Figure)X
+1303(4)X
+1369(depicts)X
+1622(the)X
+1746(data)X
+1905(structures)X
+2242(used)X
+2414(to)X
+720 978(manage)N
+990(the)X
+1108(buffer)X
+1325(pool.)X
+892 1092(The)N
+1040(in-memory)X
+1419(bucket)X
+1656(array)X
+1845(contains)X
+2134(pointers)X
+2414(to)X
+720 1180(buffer)N
+975(header)X
+1248(structures)X
+1617(which)X
+1870(represent)X
+2222(primary)X
+720 1268(pages.)N
+968(Buffer)X
+1203(headers)X
+1474(contain)X
+1735(modi\256ed)X
+2043(bits,)X
+2202(the)X
+2324(page)X
+720 1356(address)N
+995(of)X
+1096(the)X
+1228(buffer,)X
+1479(a)X
+1548(pointer)X
+1808(to)X
+1903(the)X
+2034(actual)X
+2259(buffer,)X
+720 1444(and)N
+875(a)X
+950(pointer)X
+1216(to)X
+1317(the)X
+1454(buffer)X
+1690(header)X
+1944(for)X
+2077(an)X
+2191(over\257ow)X
+720 1532(page)N
+901(if)X
+979(it)X
+1052(exists,)X
+1283(in)X
+1374(addition)X
+1665(to)X
+1756(the)X
+1883(LRU)X
+2072(links.)X
+2296(If)X
+2378(the)X
+720 1620(buffer)N
+950(corresponding)X
+1442(to)X
+1537(a)X
+1606(particular)X
+1947(bucket)X
+2194(is)X
+2280(not)X
+2414(in)X
+720 1708(memory,)N
+1048(its)X
+1164(pointer)X
+1432(is)X
+1526(NULL.)X
+1801(In)X
+1909(effect,)X
+2154(pages)X
+2377(are)X
+720 1796(linked)N
+950(in)X
+1042(three)X
+1233(ways.)X
+1468(Using)X
+1689(the)X
+1817(buffer)X
+2043(headers,)X
+2338(they)X
+720 1884(are)N
+851(linked)X
+1083(physically)X
+1444(through)X
+1725(the)X
+1854(LRU)X
+2045(links)X
+2231(and)X
+2378(the)X
+720 1972(over\257ow)N
+1036(links.)X
+1241(Using)X
+1462(the)X
+1590(pages)X
+1803(themselves,)X
+2209(they)X
+2377(are)X
+720 2060(linked)N
+943(logically)X
+1246(through)X
+1518(the)X
+1639(over\257ow)X
+1946(addresses)X
+2276(on)X
+2378(the)X
+720 2148(page.)N
+948(Since)X
+1162(over\257ow)X
+1482(pages)X
+1700(are)X
+1834(accessed)X
+2151(only)X
+2328(after)X
+720 2236(their)N
+904(predecessor)X
+1321(pages,)X
+1560(they)X
+1734(are)X
+1869(removed)X
+2186(from)X
+2378(the)X
+720 2324(buffer)N
+937(pool)X
+1099(when)X
+1293(their)X
+1460(primary)X
+1734(is)X
+1807(removed.)X
+10 f
+720 2412 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+1 Dt
+2309 3177 MXY
+24 15 Dl
+-8 -15 Dl
+8 -15 Dl
+-24 15 Dl
+52 0 Dl
+789 3160 MXY
+-35 0 Dl
+0 -156 Dl
+1607 0 Dl
+0 173 Dl
+789 3091 MXY
+-24 -15 Dl
+9 15 Dl
+-9 15 Dl
+24 -15 Dl
+-69 0 Dl
+2309 3125 MXY
+104 0 Dl
+0 -155 Dl
+-1693 0 Dl
+0 121 Dl
+927 3160 MXY
+24 15 Dl
+-9 -15 Dl
+9 -15 Dl
+-24 15 Dl
+553 0 Dl
+1618 3177 MXY
+8 27 Dl
+4 -17 Dl
+16 -6 Dl
+-28 -4 Dl
+138 121 Dl
+1895 3315 MXY
+28 3 Dl
+-15 -9 Dl
+1 -18 Dl
+-14 24 Dl
+276 -138 Dl
+3108 MY
+-28 -3 Dl
+15 10 Dl
+-1 17 Dl
+14 -24 Dl
+-276 138 Dl
+1756 3229 MXY
+-8 -27 Dl
+-3 17 Dl
+-16 6 Dl
+27 4 Dl
+-138 -121 Dl
+1480 MX
+-24 -15 Dl
+9 15 Dl
+-9 15 Dl
+24 -15 Dl
+-553 0 Dl
+3 f
+5 s
+1083 3073(LRU)N
+1178(chain)X
+4 Ds
+1402 3851 MXY
+ 1402 3851 lineto
+ 1471 3851 lineto
+ 1471 3920 lineto
+ 1402 3920 lineto
+ 1402 3851 lineto
+closepath 19 1402 3851 1471 3920 Dp
+1445 3747(Over\257ow)N
+1613(Address)X
+1549 3609 MXY
+0 69 Dl
+1756 MX
+-23 -15 Dl
+8 15 Dl
+-8 15 Dl
+23 -15 Dl
+-207 0 Dl
+-1 Ds
+3 Dt
+1756 3419 MXY
+-6 -28 Dl
+-4 17 Dl
+-17 5 Dl
+27 6 Dl
+-138 -138 Dl
+2240 3471 MXY
+15 -24 Dl
+-15 9 Dl
+-15 -9 Dl
+15 24 Dl
+0 -138 Dl
+1826 3609 MXY
+15 -24 Dl
+-15 9 Dl
+-16 -9 Dl
+16 24 Dl
+0 -138 Dl
+1549 MX
+15 -24 Dl
+-15 9 Dl
+-15 -9 Dl
+15 24 Dl
+0 -138 Dl
+858 3471 MXY
+15 -24 Dl
+-15 9 Dl
+-15 -9 Dl
+15 24 Dl
+0 -138 Dl
+2240 3056 MXY
+15 -24 Dl
+-15 9 Dl
+-15 -9 Dl
+15 24 Dl
+0 -138 Dl
+1549 3056 MXY
+15 -24 Dl
+-15 9 Dl
+-15 -9 Dl
+15 24 Dl
+0 -138 Dl
+858 3056 MXY
+15 -24 Dl
+-15 9 Dl
+-15 -9 Dl
+15 24 Dl
+0 -138 Dl
+1 Dt
+2171 3471 MXY
+ 2171 3471 lineto
+ 2448 3471 lineto
+ 2448 3609 lineto
+ 2171 3609 lineto
+ 2171 3471 lineto
+closepath 19 2171 3471 2448 3609 Dp
+1756 3609 MXY
+ 1756 3609 lineto
+ 2033 3609 lineto
+ 2033 3747 lineto
+ 1756 3747 lineto
+ 1756 3609 lineto
+closepath 3 1756 3609 2033 3747 Dp
+1480 3471 MXY
+ 1480 3471 lineto
+ 1756 3471 lineto
+ 1756 3609 lineto
+ 1480 3609 lineto
+ 1480 3471 lineto
+closepath 19 1480 3471 1756 3609 Dp
+789 MX
+ 789 3471 lineto
+ 1065 3471 lineto
+ 1065 3609 lineto
+ 789 3609 lineto
+ 789 3471 lineto
+closepath 19 789 3471 1065 3609 Dp
+962 3903(Buffer)N
+1083(Header)X
+849 3851 MXY
+ 849 3851 lineto
+ 918 3851 lineto
+ 918 3920 lineto
+ 849 3920 lineto
+ 849 3851 lineto
+closepath 14 849 3851 918 3920 Dp
+1756 3194 MXY
+ 1756 3194 lineto
+ 1895 3194 lineto
+ 1895 3471 lineto
+ 1756 3471 lineto
+ 1756 3194 lineto
+closepath 14 1756 3194 1895 3471 Dp
+2171 3056 MXY
+ 2171 3056 lineto
+ 2309 3056 lineto
+ 2309 3333 lineto
+ 2171 3333 lineto
+ 2171 3056 lineto
+closepath 14 2171 3056 2309 3333 Dp
+1480 MX
+ 1480 3056 lineto
+ 1618 3056 lineto
+ 1618 3333 lineto
+ 1480 3333 lineto
+ 1480 3056 lineto
+closepath 14 1480 3056 1618 3333 Dp
+789 MX
+ 789 3056 lineto
+ 927 3056 lineto
+ 927 3333 lineto
+ 789 3333 lineto
+ 789 3056 lineto
+closepath 14 789 3056 927 3333 Dp
+2780 MY
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+927 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+1065 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+1203 MX
+0 138 Dl
+139 0 Dl
+0 -138 Dl
+-139 0 Dl
+1342 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+1480 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+1618 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+1756 MX
+0 138 Dl
+139 0 Dl
+0 -138 Dl
+-139 0 Dl
+1895 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+2033 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+2171 MX
+0 138 Dl
+138 0 Dl
+0 -138 Dl
+-138 0 Dl
+2309 MX
+0 138 Dl
+139 0 Dl
+0 -138 Dl
+-139 0 Dl
+13 s
+1048 2720(In)N
+1173(Memory)X
+1580(Bucket)X
+1918(Array)X
+867 3584(B0)N
+1558(B5)X
+2223(B10)X
+1788 3722(O1/1)N
+5 s
+1515 3903(Primay)N
+1651(Buffer)X
+4 Ds
+1990 3851 MXY
+ 1990 3851 lineto
+ 2059 3851 lineto
+ 2059 3920 lineto
+ 1990 3920 lineto
+ 1990 3851 lineto
+closepath 3 1990 3851 2059 3920 Dp
+2102 3903(Over\257ow)N
+2270(Buffer)X
+3 Dt
+-1 Ds
+8 s
+720 4184(Figure)N
+922(4:)X
+1 f
+996(Three)X
+1164(primary)X
+1386(pages)X
+1551(\(B0,)X
+1683(B5,)X
+1794(B10\))X
+1942(are)X
+2039(accessed)X
+2281(directly)X
+720 4272(from)N
+862(the)X
+958(bucket)X
+1146(array.)X
+1326(The)X
+1443(one)X
+1553(over\257ow)X
+1798(page)X
+1935(\(O1/1\))X
+2122(is)X
+2182(linked)X
+2359(phy-)X
+720 4360(sically)N
+915(from)X
+1067(its)X
+1155(primary)X
+1384(page's)X
+1577(buffer)X
+1759(header)X
+1955(as)X
+2035(well)X
+2172(as)X
+2252(logically)X
+720 4448(from)N
+860(its)X
+937(predecessor)X
+1253(page)X
+1389(buffer)X
+1560(\(B5\).)X
+10 s
+10 f
+720 4624 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+1191 4954(Table)N
+1406(Parameterization)X
+1 f
+892 5086(When)N
+1107(a)X
+1166(hash)X
+1336(table)X
+1515(is)X
+1590(created,)X
+1865(the)X
+1985(bucket)X
+2221(size,)X
+2388(\256ll)X
+720 5174(factor,)N
+953(initial)X
+1164(number)X
+1434(of)X
+1526(elements,)X
+1856(number)X
+2125(of)X
+2216(bytes)X
+2409(of)X
+720 5262(main)N
+919(memory)X
+1225(used)X
+1411(for)X
+1543(caching,)X
+1851(and)X
+2005(a)X
+2079(user-de\256ned)X
+720 5350(hash)N
+892(function)X
+1184(may)X
+1347(be)X
+1448(speci\256ed.)X
+1797(The)X
+1946(bucket)X
+2184(size)X
+2333(\(and)X
+720 5438(page)N
+906(size)X
+1064(for)X
+1191(over\257ow)X
+1509(pages\))X
+1752(defaults)X
+2039(to)X
+2134(256)X
+2287(bytes.)X
+720 5526(For)N
+858(tables)X
+1072(with)X
+1241(large)X
+1429(data)X
+1590(items,)X
+1810(it)X
+1881(may)X
+2046(be)X
+2149(preferable)X
+720 5614(to)N
+803(increase)X
+1088(the)X
+1207(page)X
+1380(size,)X
+1545(and,)X
+1701(conversely,)X
+2089(applications)X
+720 5702(storing)N
+1002(small)X
+1235(items)X
+1467(exclusively)X
+1891(in)X
+2012(memory)X
+2338(may)X
+2706 538(bene\256t)N
+2966(from)X
+3164(a)X
+3242(smaller)X
+3520(bucket)X
+3776(size.)X
+3983(A)X
+4082(bucket)X
+4337(size)X
+2706 626(smaller)N
+2962(than)X
+3120(64)X
+3220(bytes)X
+3409(is)X
+3482(not)X
+3604(recommended.)X
+2878 740(The)N
+3031(\256ll)X
+3147(factor)X
+3363(indicates)X
+3676(a)X
+3740(desired)X
+4000(density)X
+4258(within)X
+2706 828(the)N
+2833(hash)X
+3009(table.)X
+3234(It)X
+3312(is)X
+3394(an)X
+3499(approximation)X
+3995(of)X
+4091(the)X
+4217(number)X
+2706 916(of)N
+2815(keys)X
+3004(allowed)X
+3300(to)X
+3404(accumulate)X
+3811(in)X
+3914(any)X
+4071(one)X
+4228(bucket,)X
+2706 1004(determining)N
+3119(when)X
+3319(the)X
+3442(hash)X
+3614(table)X
+3795(grows.)X
+4056(Its)X
+4161(default)X
+4409(is)X
+2706 1092(eight.)N
+2953(If)X
+3054(the)X
+3199(user)X
+3380(knows)X
+3636(the)X
+3781(average)X
+4079(size)X
+4251(of)X
+4364(the)X
+2706 1180(key/data)N
+3008(pairs)X
+3194(being)X
+3402(stored)X
+3627(in)X
+3718(the)X
+3845(table,)X
+4050(near)X
+4218(optimal)X
+2706 1268(bucket)N
+2943(sizes)X
+3122(and)X
+3261(\256ll)X
+3372(factors)X
+3614(may)X
+3775(be)X
+3874(selected)X
+4155(by)X
+4257(apply-)X
+2706 1356(ing)N
+2828(the)X
+2946(equation:)X
+0 f
+8 s
+2706 1655(\(1\))N
+2994 -0.3938(\(\(average_pair_length)AX
+3830(+)X
+3906(4\))X
+4020(*)X
+3032 1743(ffactor\))N
+3374(>=)X
+3488(bsize)X
+1 f
+10 s
+2706 2042(For)N
+2859(highly)X
+3104(time)X
+3287(critical)X
+3551(applications,)X
+3999(experimenting)X
+2706 2130(with)N
+2919(different)X
+3266(bucket)X
+3550(sizes)X
+3776(and)X
+3962(\256ll)X
+4120(factors)X
+4409(is)X
+2706 2218(encouraged.)N
+2878 2332(Figures)N
+3144(5a,b,)X
+3326(and)X
+3468(c)X
+3530(illustrate)X
+3836(the)X
+3960(effects)X
+4200(of)X
+4292(vary-)X
+2706 2420(ing)N
+2841(page)X
+3026(sizes)X
+3215(and)X
+3363(\256ll)X
+3483(factors)X
+3734(for)X
+3860(the)X
+3990(same)X
+4187(data)X
+4353(set.)X
+2706 2508(The)N
+2864(data)X
+3031(set)X
+3152(consisted)X
+3482(of)X
+3581(24474)X
+3813(keys)X
+3992(taken)X
+4198(from)X
+4386(an)X
+2706 2596(online)N
+2931(dictionary.)X
+3301(The)X
+3451(data)X
+3609(value)X
+3807(for)X
+3925(each)X
+4097(key)X
+4237(was)X
+4386(an)X
+2706 2684(ASCII)N
+2938(string)X
+3143(for)X
+3260(an)X
+3359(integer)X
+3605(from)X
+3784(1)X
+3847(to)X
+3931(24474)X
+4153(inclusive.)X
+2706 2772(The)N
+2867(test)X
+3013(run)X
+3155(consisted)X
+3488(of)X
+3590(creating)X
+3884(a)X
+3955(new)X
+4124(hash)X
+4306(table)X
+2706 2860(\(where)N
+2966(the)X
+3100(ultimate)X
+3398(size)X
+3559(of)X
+3662(the)X
+3796(table)X
+3987(was)X
+4147(known)X
+4400(in)X
+2706 2948(advance\),)N
+3054(entering)X
+3354(each)X
+3539(key/data)X
+3848(pair)X
+4010(into)X
+4171(the)X
+4306(table)X
+2706 3036(and)N
+2849(then)X
+3014(retrieving)X
+3353(each)X
+3528(key/data)X
+3827(pair)X
+3979(from)X
+4162(the)X
+4286(table.)X
+2706 3124(Each)N
+2898(of)X
+2996(the)X
+3125(graphs)X
+3369(shows)X
+3599(the)X
+3727(timings)X
+3996(resulting)X
+4306(from)X
+2706 3212(varying)N
+2973(the)X
+3093(pagesize)X
+3392(from)X
+3570(128)X
+3712(bytes)X
+3903(to)X
+3986(1M)X
+4118(and)X
+4255(the)X
+4374(\256ll)X
+2706 3300(factor)N
+2929(from)X
+3120(1)X
+3195(to)X
+3292(128.)X
+3486(For)X
+3631(each)X
+3813(run,)X
+3974(the)X
+4106(buffer)X
+4337(size)X
+2706 3388(was)N
+2874(set)X
+3006(at)X
+3106(1M.)X
+3299(The)X
+3466(tests)X
+3650(were)X
+3849(all)X
+3971(run)X
+4120(on)X
+4242(an)X
+4360(HP)X
+2706 3476(9000/370)N
+3077(\(33.3)X
+3312(Mhz)X
+3527(MC68030\),)X
+3966(with)X
+4176(16M)X
+4395(of)X
+2706 3564(memory,)N
+3042(64K)X
+3228(physically)X
+3605(addressed)X
+3970(cache,)X
+4222(and)X
+4386(an)X
+2706 3652(HP7959S)N
+3055(disk)X
+3231(drive,)X
+3459(running)X
+3751(4.3BSD-Reno)X
+4244(single-)X
+2706 3740(user.)N
+2878 3854(Both)N
+3066(system)X
+3321(time)X
+3496(\(Figure)X
+3764(5a\))X
+3899(and)X
+4047(elapsed)X
+4320(time)X
+2706 3942(\(Figure)N
+2966(5b\))X
+3097(show)X
+3290(that)X
+3434(for)X
+3552(all)X
+3655(bucket)X
+3892(sizes,)X
+4091(the)X
+4212(greatest)X
+2706 4030(performance)N
+3137(gains)X
+3329(are)X
+3451(made)X
+3648(by)X
+3751(increasing)X
+4104(the)X
+4225(\256ll)X
+4336(fac-)X
+2706 4118(tor)N
+2822(until)X
+2995(equation)X
+3298(1)X
+3365(is)X
+3445(satis\256ed.)X
+3774(The)X
+3925(user)X
+4085(time)X
+4253(shown)X
+2706 4206(in)N
+2791(Figure)X
+3023(5c)X
+3122(gives)X
+3314(a)X
+3373(more)X
+3561(detailed)X
+3838(picture)X
+4083(of)X
+4172(how)X
+4332(per-)X
+2706 4294(formance)N
+3054(varies.)X
+3330(The)X
+3499(smaller)X
+3778(bucket)X
+4035(sizes)X
+4234(require)X
+2706 4382(fewer)N
+2921(keys)X
+3099(per)X
+3233(page)X
+3416(to)X
+3509(satisfy)X
+3749(equation)X
+4056(1)X
+4127(and)X
+4274(there-)X
+2706 4470(fore)N
+2860(incur)X
+3049(fewer)X
+3257(collisions.)X
+3607(However,)X
+3946(when)X
+4144(the)X
+4265(buffer)X
+2706 4558(pool)N
+2884(size)X
+3045(is)X
+3134(\256xed,)X
+3349(smaller)X
+3620(pages)X
+3838(imply)X
+4059(more)X
+4259(pages.)X
+2706 4646(An)N
+2830(increased)X
+3160(number)X
+3430(of)X
+3522(pages)X
+3730(means)X
+3960(more)X
+2 f
+4150(malloc\(3\))X
+1 f
+2706 4734(calls)N
+2879(and)X
+3021(more)X
+3212(overhead)X
+3533(in)X
+3621(the)X
+3745(hash)X
+3918(package's)X
+4265(buffer)X
+2706 4822(manager)N
+3003(to)X
+3085(manage)X
+3355(the)X
+3473(additional)X
+3813(pages.)X
+2878 4936(The)N
+3028(tradeoff)X
+3308(works)X
+3529(out)X
+3655(most)X
+3834(favorably)X
+4166(when)X
+4364(the)X
+2706 5024(page)N
+2886(size)X
+3039(is)X
+3120(256)X
+3268(and)X
+3412(the)X
+3538(\256ll)X
+3654(factor)X
+3870(is)X
+3950(8.)X
+4057(Similar)X
+4319(con-)X
+2706 5112(clusions)N
+3009(were)X
+3207(obtained)X
+3524(if)X
+3614(the)X
+3753(test)X
+3905(was)X
+4071(run)X
+4218(without)X
+2706 5200(knowing)N
+3007(the)X
+3126(\256nal)X
+3289(table)X
+3466(size)X
+3612(in)X
+3695(advance.)X
+4020(If)X
+4095(the)X
+4214(\256le)X
+4337(was)X
+2706 5288(closed)N
+2942(and)X
+3088(written)X
+3345(to)X
+3437(disk,)X
+3620(the)X
+3748(conclusions)X
+4156(were)X
+4343(still)X
+2706 5376(the)N
+2832(same.)X
+3065(However,)X
+3408(rereading)X
+3740(the)X
+3865(\256le)X
+3994(from)X
+4177(disk)X
+4337(was)X
+2706 5464(slightly)N
+2983(faster)X
+3199(if)X
+3285(a)X
+3358(larger)X
+3583(bucket)X
+3834(size)X
+3996(and)X
+4149(\256ll)X
+4274(factor)X
+2706 5552(were)N
+2898(used)X
+3079(\(1K)X
+3238(bucket)X
+3486(size)X
+3645(and)X
+3795(32)X
+3909(\256ll)X
+4031(factor\).)X
+4320(This)X
+2706 5640(follows)N
+2987(intuitively)X
+3356(from)X
+3553(the)X
+3691(improved)X
+4038(ef\256ciency)X
+4395(of)X
+3 f
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+4424(7)X
+
+8 p
+%%Page: 8 8
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+432 258(A)N
+510(New)X
+682(Hashing)X
+985(Package)X
+1290(for)X
+1413(UNIX)X
+3663(Seltzer)X
+3920(&)X
+4007(Yigit)X
+1 f
+432 538(performing)N
+830(1K)X
+965(reads)X
+1172(from)X
+1365(the)X
+1500(disk)X
+1670(rather)X
+1894(than)X
+2068(256)X
+432 626(byte)N
+609(reads.)X
+857(In)X
+962(general,)X
+1257(performance)X
+1702(for)X
+1834(disk)X
+2005(based)X
+432 714(tables)N
+639(is)X
+712(best)X
+861(when)X
+1055(the)X
+1173(page)X
+1345(size)X
+1490(is)X
+1563(approximately)X
+2046(1K.)X
+10 f
+432 802 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+619 2380 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+629 2437 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+648 2504 MXY
+-12 25 Dl
+24 0 Dl
+-12 -25 Dl
+686 2515 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+762 2516 MXY
+-12 24 Dl
+25 0 Dl
+-13 -24 Dl
+916 2515 MXY
+-13 24 Dl
+25 0 Dl
+-12 -24 Dl
+1222 2516 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+1834 2515 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+1 Dt
+619 2392 MXY
+10 57 Dl
+19 67 Dl
+38 11 Dl
+76 1 Dl
+154 -1 Dl
+306 1 Dl
+612 -1 Dl
+8 s
+1 f
+1628 2522(128)N
+3 Dt
+607 2245 MXY
+24 Dc
+617 2375 MXY
+23 Dc
+635 2442 MXY
+24 Dc
+674 2525 MXY
+23 Dc
+750 2529 MXY
+24 Dc
+904 2527 MXY
+23 Dc
+1210 MX
+23 Dc
+1822 2528 MXY
+23 Dc
+20 Ds
+1 Dt
+619 2245 MXY
+10 130 Dl
+19 67 Dl
+38 83 Dl
+76 4 Dl
+154 -2 Dl
+306 0 Dl
+612 1 Dl
+678 2482(256)N
+-1 Ds
+3 Dt
+619 2127 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+629 2191 MXY
+0 25 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+648 2334 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+686 2409 MXY
+0 25 Dl
+0 -13 Dl
+12 0 Dl
+-24 0 Dl
+762 2516 MXY
+0 25 Dl
+0 -12 Dl
+13 0 Dl
+-25 0 Dl
+916 2516 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-25 0 Dl
+1222 2515 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+1834 2515 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+5 Dt
+619 2139 MXY
+10 65 Dl
+19 142 Dl
+38 75 Dl
+76 108 Dl
+154 -1 Dl
+306 -1 Dl
+612 0 Dl
+694 2401(512)N
+3 Dt
+631 2064 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+641 2077 MXY
+-24 25 Dl
+12 -12 Dl
+-12 -13 Dl
+24 25 Dl
+660 2132 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+698 2292 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+775 2382 MXY
+-25 24 Dl
+12 -12 Dl
+-12 -12 Dl
+25 24 Dl
+928 2516 MXY
+-25 24 Dl
+13 -12 Dl
+-13 -12 Dl
+25 24 Dl
+1234 2516 MXY
+-24 25 Dl
+12 -12 Dl
+-12 -13 Dl
+24 25 Dl
+1846 2516 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+16 Ds
+1 Dt
+619 2076 MXY
+10 14 Dl
+19 54 Dl
+38 160 Dl
+76 90 Dl
+154 134 Dl
+306 1 Dl
+612 -1 Dl
+694 2257(1024)N
+-1 Ds
+3 Dt
+619 1877 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+629 1855 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+648 1838 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+686 1860 MXY
+12 -25 Dl
+-24 0 Dl
+12 25 Dl
+762 1923 MXY
+13 -24 Dl
+-25 0 Dl
+12 24 Dl
+916 2087 MXY
+12 -24 Dl
+-25 0 Dl
+13 24 Dl
+1222 2256 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+1834 2541 MXY
+12 -25 Dl
+-24 0 Dl
+12 25 Dl
+619 1865 MXY
+10 -22 Dl
+19 -17 Dl
+38 21 Dl
+76 64 Dl
+154 164 Dl
+306 169 Dl
+612 285 Dl
+1645 2427(4096)N
+619 1243 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+629 1196 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+648 1146 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+686 1174 MXY
+0 25 Dl
+0 -13 Dl
+12 0 Dl
+-24 0 Dl
+762 1249 MXY
+0 24 Dl
+0 -12 Dl
+13 0 Dl
+-25 0 Dl
+916 1371 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-25 0 Dl
+1222 1680 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+1834 1999 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+619 1255 MXY
+10 -47 Dl
+19 -50 Dl
+38 28 Dl
+76 75 Dl
+154 122 Dl
+306 309 Dl
+612 319 Dl
+1741 1934(8192)N
+5 Dt
+609 2531 MXY
+1225 0 Dl
+609 MX
+0 -1553 Dl
+2531 MY
+0 16 Dl
+4 Ds
+1 Dt
+2531 MY
+0 -1553 Dl
+593 2625(0)N
+-1 Ds
+5 Dt
+916 2531 MXY
+0 16 Dl
+4 Ds
+1 Dt
+2531 MY
+0 -1553 Dl
+884 2625(32)N
+-1 Ds
+5 Dt
+1222 2531 MXY
+0 16 Dl
+4 Ds
+1 Dt
+2531 MY
+0 -1553 Dl
+1190 2625(64)N
+-1 Ds
+5 Dt
+1528 2531 MXY
+0 16 Dl
+4 Ds
+1 Dt
+2531 MY
+0 -1553 Dl
+1496 2625(96)N
+-1 Ds
+5 Dt
+1834 2531 MXY
+0 16 Dl
+4 Ds
+1 Dt
+2531 MY
+0 -1553 Dl
+1786 2625(128)N
+-1 Ds
+5 Dt
+609 2531 MXY
+-16 0 Dl
+4 Ds
+1 Dt
+609 MX
+1225 0 Dl
+545 2558(0)N
+-1 Ds
+5 Dt
+609 2013 MXY
+-16 0 Dl
+4 Ds
+1 Dt
+609 MX
+1225 0 Dl
+481 2040(100)N
+-1 Ds
+5 Dt
+609 1496 MXY
+-16 0 Dl
+4 Ds
+1 Dt
+609 MX
+1225 0 Dl
+481 1523(200)N
+-1 Ds
+5 Dt
+609 978 MXY
+-16 0 Dl
+4 Ds
+1 Dt
+609 MX
+1225 0 Dl
+481 1005(300)N
+1088 2724(Fill)N
+1194(Factor)X
+422 1611(S)N
+426 1667(e)N
+426 1724(c)N
+424 1780(o)N
+424 1837(n)N
+424 1893(d)N
+428 1949(s)N
+3 Dt
+-1 Ds
+3 f
+432 2882(Figure)N
+636(5a:)X
+1 f
+744(System)X
+956(Time)X
+1113(for)X
+1209(dictionary)X
+1490(data)X
+1618(set)X
+1711(with)X
+1847(1M)X
+1958(of)X
+2033(buffer)X
+432 2970(space)N
+594(and)X
+707(varying)X
+923(bucket)X
+1114(sizes)X
+1259(and)X
+1372(\256ll)X
+1465(factors.)X
+1675(Each)X
+1823(line)X
+1940(is)X
+2004(labeled)X
+432 3058(with)N
+562(its)X
+639(bucket)X
+825(size.)X
+10 s
+10 f
+432 3234 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+8 s
+1 f
+428 4381(s)N
+424 4325(d)N
+424 4269(n)N
+424 4212(o)N
+426 4156(c)N
+426 4099(e)N
+422 4043(S)N
+1116 5156(Fill)N
+1222(Factor)X
+506 3437(3200)N
+4 Ds
+1 Dt
+666 3410 MXY
+1168 0 Dl
+-1 Ds
+5 Dt
+666 MX
+-16 0 Dl
+506 3825(2400)N
+4 Ds
+1 Dt
+666 3799 MXY
+1168 0 Dl
+-1 Ds
+5 Dt
+666 MX
+-16 0 Dl
+506 4214(1600)N
+4 Ds
+1 Dt
+666 4186 MXY
+1168 0 Dl
+-1 Ds
+5 Dt
+666 MX
+-16 0 Dl
+538 4602(800)N
+4 Ds
+1 Dt
+666 4575 MXY
+1168 0 Dl
+-1 Ds
+5 Dt
+666 MX
+-16 0 Dl
+602 4990(0)N
+4 Ds
+1 Dt
+666 4963 MXY
+1168 0 Dl
+-1 Ds
+5 Dt
+666 MX
+-16 0 Dl
+1786 5057(128)N
+4 Ds
+1 Dt
+1834 4963 MXY
+0 -1553 Dl
+-1 Ds
+5 Dt
+4963 MY
+0 16 Dl
+1510 5057(96)N
+4 Ds
+1 Dt
+1542 4963 MXY
+0 -1553 Dl
+-1 Ds
+5 Dt
+4963 MY
+0 16 Dl
+1218 5057(64)N
+4 Ds
+1 Dt
+1250 4963 MXY
+0 -1553 Dl
+-1 Ds
+5 Dt
+4963 MY
+0 16 Dl
+926 5057(32)N
+4 Ds
+1 Dt
+958 4963 MXY
+0 -1553 Dl
+-1 Ds
+5 Dt
+4963 MY
+0 16 Dl
+650 5057(0)N
+4 Ds
+1 Dt
+666 4963 MXY
+0 -1553 Dl
+-1 Ds
+5 Dt
+4963 MY
+0 16 Dl
+4963 MY
+0 -1553 Dl
+4963 MY
+1168 0 Dl
+1741 4752(8192)N
+3 Dt
+675 3732 MXY
+9 -172 Dl
+18 -118 Dl
+37 128 Dl
+73 -121 Dl
+146 623 Dl
+292 497 Dl
+584 245 Dl
+4802 MY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+1250 4557 MXY
+0 25 Dl
+0 -13 Dl
+12 0 Dl
+-24 0 Dl
+958 4060 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+812 3437 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+739 3558 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+702 3430 MXY
+0 25 Dl
+0 -13 Dl
+13 0 Dl
+-25 0 Dl
+684 3548 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+675 3720 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+1637 4912(4096)N
+675 4307 MXY
+9 -58 Dl
+18 30 Dl
+37 89 Dl
+73 144 Dl
+146 235 Dl
+292 122 Dl
+584 89 Dl
+4970 MY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+1250 4881 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+958 4759 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+812 4524 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+739 4380 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+702 4291 MXY
+13 -24 Dl
+-25 0 Dl
+12 24 Dl
+684 4261 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+675 4319 MXY
+12 -24 Dl
+-24 0 Dl
+12 24 Dl
+734 4662(1024)N
+16 Ds
+1 Dt
+675 4352 MXY
+9 60 Dl
+18 134 Dl
+37 266 Dl
+73 117 Dl
+146 30 Dl
+292 0 Dl
+584 -1 Dl
+-1 Ds
+3 Dt
+1846 4946 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+1262 4946 MXY
+-24 25 Dl
+12 -12 Dl
+-12 -13 Dl
+24 25 Dl
+970 4947 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+824 4917 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+751 4800 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+715 4534 MXY
+-25 25 Dl
+12 -13 Dl
+-12 -12 Dl
+25 25 Dl
+696 4400 MXY
+-24 24 Dl
+12 -12 Dl
+-12 -12 Dl
+24 24 Dl
+687 4339 MXY
+-24 25 Dl
+12 -12 Dl
+-12 -13 Dl
+24 25 Dl
+718 4792(512)N
+5 Dt
+675 4422 MXY
+9 137 Dl
+18 278 Dl
+37 105 Dl
+73 18 Dl
+146 -1 Dl
+292 0 Dl
+584 -1 Dl
+3 Dt
+4946 MY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+1250 4946 MXY
+0 25 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+958 4947 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+812 4948 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+739 4930 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+702 4824 MXY
+0 25 Dl
+0 -12 Dl
+13 0 Dl
+-25 0 Dl
+684 4547 MXY
+0 24 Dl
+0 -12 Dl
+12 0 Dl
+-24 0 Dl
+675 4410 MXY
+0 25 Dl
+0 -13 Dl
+12 0 Dl
+-24 0 Dl
+750 4921(256)N
+20 Ds
+1 Dt
+675 4597 MXY
+9 246 Dl
+18 106 Dl
+37 10 Dl
+73 0 Dl
+146 0 Dl
+292 0 Dl
+584 -1 Dl
+-1 Ds
+3 Dt
+1822 MX
+23 Dc
+1238 4959 MXY
+23 Dc
+946 MX
+23 Dc
+800 MX
+23 Dc
+727 MX
+23 Dc
+691 4949 MXY
+23 Dc
+672 4843 MXY
+24 Dc
+663 4597 MXY
+24 Dc
+1395 4961(128)N
+1 Dt
+675 4855 MXY
+9 93 Dl
+18 10 Dl
+37 1 Dl
+73 0 Dl
+146 -1 Dl
+292 0 Dl
+584 0 Dl
+3 Dt
+4946 MY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+1250 MX
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+958 MX
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+812 MX
+-12 25 Dl
+24 0 Dl
+-12 -25 Dl
+739 4947 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+702 4946 MXY
+-12 24 Dl
+25 0 Dl
+-13 -24 Dl
+684 4936 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+675 4843 MXY
+-12 24 Dl
+24 0 Dl
+-12 -24 Dl
+3 Dt
+-1 Ds
+3 f
+432 5314(Figure)N
+634(5b:)X
+1 f
+744(Elapsed)X
+967(Time)X
+1123(for)X
+1218(dictionary)X
+1498(data)X
+1625(set)X
+1717(with)X
+1851(1M)X
+1960(of)X
+2033(buffer)X
+432 5402(space)N
+593(and)X
+705(varying)X
+920(bucket)X
+1110(sizes)X
+1254(and)X
+1366(\256ll)X
+1457(factors.)X
+1681(Each)X
+1827(line)X
+1942(is)X
+2004(labeled)X
+432 5490(with)N
+562(its)X
+639(bucket)X
+825(size.)X
+10 s
+2590 538(If)N
+2677(an)X
+2785(approximation)X
+3284(of)X
+3383(the)X
+3513(number)X
+3790(of)X
+3889(elements)X
+2418 626(ultimately)N
+2773(to)X
+2866(be)X
+2973(stored)X
+3200(in)X
+3293(the)X
+3422(hash)X
+3599(table)X
+3785(is)X
+3868(known)X
+4116(at)X
+2418 714(the)N
+2564(time)X
+2754(of)X
+2869(creation,)X
+3196(the)X
+3342(hash)X
+3536(package)X
+3847(takes)X
+4059(this)X
+2418 802(number)N
+2688(as)X
+2779(a)X
+2839(parameter)X
+3185(and)X
+3325(uses)X
+3487(it)X
+3555(to)X
+3641(hash)X
+3812(entries)X
+4050(into)X
+2418 890(the)N
+2541(full)X
+2677(sized)X
+2867(table)X
+3048(rather)X
+3261(than)X
+3424(growing)X
+3716(the)X
+3838(table)X
+4018(from)X
+2418 978(a)N
+2477(single)X
+2691(bucket.)X
+2968(If)X
+3044(this)X
+3181(number)X
+3448(is)X
+3523(not)X
+3647(known,)X
+3907(the)X
+4027(hash)X
+2418 1066(table)N
+2632(starts)X
+2859(with)X
+3059(a)X
+3153(single)X
+3402(bucket)X
+3674(and)X
+3848(gracefully)X
+2418 1154(expands)N
+2707(as)X
+2800(elements)X
+3111(are)X
+3236(added,)X
+3474(although)X
+3780(a)X
+3842(slight)X
+4044(per-)X
+2418 1242(formance)N
+2747(degradation)X
+3151(may)X
+3313(be)X
+3413(noticed.)X
+3713(Figure)X
+3946(6)X
+4010(illus-)X
+2418 1330(trates)N
+2625(the)X
+2756(difference)X
+3116(in)X
+3211(performance)X
+3651(between)X
+3952(storing)X
+2418 1418(keys)N
+2588(in)X
+2673(a)X
+2732(\256le)X
+2857(when)X
+3054(the)X
+3174(ultimate)X
+3458(size)X
+3605(is)X
+3680(known)X
+3920(\(the)X
+4067(left)X
+2418 1506(bars)N
+2581(in)X
+2672(each)X
+2849(set\),)X
+3014(compared)X
+3360(to)X
+3450(building)X
+3744(the)X
+3870(\256le)X
+4000(when)X
+2418 1594(the)N
+2550(ultimate)X
+2846(size)X
+3005(is)X
+3091(unknown)X
+3422(\(the)X
+3580(right)X
+3764(bars)X
+3931(in)X
+4026(each)X
+2418 1682(set\).)N
+2609(Once)X
+2814(the)X
+2947(\256ll)X
+3069(factor)X
+3291(is)X
+3378(suf\256ciently)X
+3772(high)X
+3948(for)X
+4076(the)X
+2418 1770(page)N
+2596(size)X
+2747(\(8\),)X
+2887(growing)X
+3180(the)X
+3304(table)X
+3486(dynamically)X
+3908(does)X
+4081(lit-)X
+2418 1858(tle)N
+2518(to)X
+2600(degrade)X
+2875(performance.)X
+10 f
+2418 1946 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+9 s
+1 f
+2413 3238(s)N
+2409 3173(d)N
+2409 3108(n)N
+2409 3043(o)N
+2411 2979(c)N
+2411 2914(e)N
+2407 2849(S)N
+3143 4129(Fill)N
+3261(Factor)X
+2448 2152(15)N
+4 Ds
+1 Dt
+2557 2122 MXY
+1473 0 Dl
+-1 Ds
+5 Dt
+2557 MX
+-19 0 Dl
+2448 2747(10)N
+4 Ds
+1 Dt
+2557 2717 MXY
+1473 0 Dl
+-1 Ds
+5 Dt
+2557 MX
+-19 0 Dl
+2484 3343(5)N
+4 Ds
+1 Dt
+2557 3313 MXY
+1473 0 Dl
+-1 Ds
+5 Dt
+2557 MX
+-19 0 Dl
+2484 3938(0)N
+4 Ds
+1 Dt
+2557 3908 MXY
+1473 0 Dl
+-1 Ds
+5 Dt
+2557 MX
+-19 0 Dl
+3976 4015(128)N
+4 Ds
+1 Dt
+4030 3908 MXY
+0 -1786 Dl
+-1 Ds
+5 Dt
+3908 MY
+0 19 Dl
+3626 4015(96)N
+4 Ds
+1 Dt
+3662 3908 MXY
+0 -1786 Dl
+-1 Ds
+5 Dt
+3908 MY
+0 19 Dl
+3258 4015(64)N
+4 Ds
+1 Dt
+3294 3908 MXY
+0 -1786 Dl
+-1 Ds
+5 Dt
+3908 MY
+0 19 Dl
+2889 4015(32)N
+4 Ds
+1 Dt
+2925 3908 MXY
+0 -1786 Dl
+-1 Ds
+5 Dt
+3908 MY
+0 19 Dl
+2539 4015(0)N
+4 Ds
+1 Dt
+2557 3908 MXY
+0 -1786 Dl
+-1 Ds
+5 Dt
+3908 MY
+0 19 Dl
+3908 MY
+0 -1786 Dl
+3908 MY
+1473 0 Dl
+4053 2378(8192)N
+3 Dt
+2569 2277 MXY
+11 0 Dl
+23 48 Dl
+46 -167 Dl
+92 35 Dl
+184 12 Dl
+369 143 Dl
+736 0 Dl
+2334 MY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+3294 2334 MXY
+0 28 Dl
+0 -14 Dl
+13 0 Dl
+-27 0 Dl
+2925 2192 MXY
+0 27 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2741 2180 MXY
+0 27 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2649 2144 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2603 2311 MXY
+0 27 Dl
+0 -13 Dl
+14 0 Dl
+-28 0 Dl
+2580 2263 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2569 2263 MXY
+0 28 Dl
+0 -14 Dl
+13 0 Dl
+-27 0 Dl
+4053 2591(4096)N
+2569 2348 MXY
+11 -11 Dl
+23 -96 Dl
+46 71 Dl
+92 72 Dl
+184 226 Dl
+369 48 Dl
+736 -60 Dl
+2612 MY
+14 -28 Dl
+-28 0 Dl
+14 28 Dl
+3294 2672 MXY
+13 -28 Dl
+-27 0 Dl
+14 28 Dl
+2925 2624 MXY
+14 -28 Dl
+-28 0 Dl
+14 28 Dl
+2741 2398 MXY
+14 -28 Dl
+-28 0 Dl
+14 28 Dl
+2649 2326 MXY
+14 -27 Dl
+-28 0 Dl
+14 27 Dl
+2603 2255 MXY
+14 -28 Dl
+-28 0 Dl
+14 28 Dl
+2580 2350 MXY
+14 -27 Dl
+-28 0 Dl
+14 27 Dl
+2569 2362 MXY
+13 -28 Dl
+-27 0 Dl
+14 28 Dl
+4053 2681(1024)N
+16 Ds
+1 Dt
+2569 2300 MXY
+11 48 Dl
+23 96 Dl
+46 95 Dl
+92 274 Dl
+184 202 Dl
+369 -155 Dl
+736 -190 Dl
+-1 Ds
+3 Dt
+4044 2656 MXY
+-28 28 Dl
+14 -14 Dl
+-14 -14 Dl
+28 28 Dl
+3307 2846 MXY
+-27 28 Dl
+14 -14 Dl
+-14 -14 Dl
+27 28 Dl
+2939 3001 MXY
+-28 28 Dl
+14 -14 Dl
+-14 -14 Dl
+28 28 Dl
+2755 2799 MXY
+-28 28 Dl
+14 -14 Dl
+-14 -14 Dl
+28 28 Dl
+2663 2525 MXY
+-28 28 Dl
+14 -14 Dl
+-14 -14 Dl
+28 28 Dl
+2617 2430 MXY
+-28 28 Dl
+14 -14 Dl
+-14 -14 Dl
+28 28 Dl
+2594 2334 MXY
+-28 28 Dl
+14 -14 Dl
+-14 -14 Dl
+28 28 Dl
+2582 2287 MXY
+-27 27 Dl
+14 -14 Dl
+-14 -13 Dl
+27 27 Dl
+4053 2851(512)N
+5 Dt
+2569 2372 MXY
+11 -24 Dl
+23 405 Dl
+46 83 Dl
+92 227 Dl
+184 -72 Dl
+369 -119 Dl
+736 -107 Dl
+3 Dt
+2751 MY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+3294 2858 MXY
+0 28 Dl
+0 -14 Dl
+13 0 Dl
+-27 0 Dl
+2925 2977 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2741 3049 MXY
+0 27 Dl
+0 -13 Dl
+14 0 Dl
+-28 0 Dl
+2649 2823 MXY
+0 27 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2603 2739 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2580 2334 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2569 2358 MXY
+0 28 Dl
+0 -14 Dl
+13 0 Dl
+-27 0 Dl
+4053 2795(256)N
+20 Ds
+1 Dt
+2569 2456 MXY
+11 285 Dl
+23 95 Dl
+46 251 Dl
+92 -60 Dl
+184 -84 Dl
+369 -107 Dl
+736 -71 Dl
+-1 Ds
+3 Dt
+4016 MX
+27 Dc
+3280 2836 MXY
+27 Dc
+2912 2943 MXY
+27 Dc
+2728 3027 MXY
+27 Dc
+2635 3087 MXY
+28 Dc
+2589 2836 MXY
+28 Dc
+2566 2741 MXY
+27 Dc
+2554 2456 MXY
+28 Dc
+4053 2741(128)N
+1 Dt
+2569 2729 MXY
+11 203 Dl
+23 131 Dl
+46 -60 Dl
+92 -119 Dl
+184 -60 Dl
+369 -83 Dl
+736 -12 Dl
+3 Dt
+2716 MY
+-14 27 Dl
+28 0 Dl
+-14 -27 Dl
+3294 2727 MXY
+-14 28 Dl
+27 0 Dl
+-13 -28 Dl
+2925 2811 MXY
+-14 27 Dl
+28 0 Dl
+-14 -27 Dl
+2741 2870 MXY
+-14 28 Dl
+28 0 Dl
+-14 -28 Dl
+2649 2989 MXY
+-14 28 Dl
+28 0 Dl
+-14 -28 Dl
+2603 3049 MXY
+-14 27 Dl
+28 0 Dl
+-14 -27 Dl
+2580 2918 MXY
+-14 28 Dl
+28 0 Dl
+-14 -28 Dl
+2569 2716 MXY
+-14 27 Dl
+27 0 Dl
+-13 -27 Dl
+3 Dt
+-1 Ds
+3 f
+8 s
+2418 4286(Figure)N
+2628(5c:)X
+1 f
+2738(User)X
+2887(Time)X
+3051(for)X
+3154(dictionary)X
+3442(data)X
+3577(set)X
+3677(with)X
+3820(1M)X
+3938(of)X
+4019(buffer)X
+2418 4374(space)N
+2579(and)X
+2691(varying)X
+2906(bucket)X
+3096(sizes)X
+3240(and)X
+3352(\256ll)X
+3443(factors.)X
+3667(Each)X
+3813(line)X
+3928(is)X
+3990(labeled)X
+2418 4462(with)N
+2548(its)X
+2625(bucket)X
+2811(size.)X
+10 s
+10 f
+2418 4638 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+1 f
+2590 4840(Since)N
+2796(no)X
+2904(known)X
+3150(hash)X
+3325(function)X
+3620(performs)X
+3938(equally)X
+2418 4928(well)N
+2589(on)X
+2702(all)X
+2815(possible)X
+3110(data,)X
+3297(the)X
+3428(user)X
+3595(may)X
+3766(\256nd)X
+3923(that)X
+4076(the)X
+2418 5016(built-in)N
+2678(hash)X
+2849(function)X
+3140(does)X
+3311(poorly)X
+3544(on)X
+3648(a)X
+3708(particular)X
+4040(data)X
+2418 5104(set.)N
+2548(In)X
+2636(this)X
+2771(case,)X
+2950(a)X
+3006(hash)X
+3173(function,)X
+3480(taking)X
+3700(two)X
+3840(arguments)X
+2418 5192(\(a)N
+2507(pointer)X
+2760(to)X
+2848(a)X
+2910(byte)X
+3074(string)X
+3282(and)X
+3424(a)X
+3486(length\))X
+3739(and)X
+3880(returning)X
+2418 5280(an)N
+2517(unsigned)X
+2829(long)X
+2993(to)X
+3077(be)X
+3175(used)X
+3344(as)X
+3433(the)X
+3553(hash)X
+3722(value,)X
+3938(may)X
+4098(be)X
+2418 5368(speci\256ed)N
+2731(at)X
+2817(hash)X
+2992(table)X
+3176(creation)X
+3463(time.)X
+3673(When)X
+3893(an)X
+3996(exist-)X
+2418 5456(ing)N
+2570(hash)X
+2767(table)X
+2973(is)X
+3076(opened)X
+3358(and)X
+3524(a)X
+3609(hash)X
+3805(function)X
+4121(is)X
+2418 5544(speci\256ed,)N
+2752(the)X
+2879(hash)X
+3054(package)X
+3346(will)X
+3498(try)X
+3615(to)X
+3705(determine)X
+4054(that)X
+2418 5632(the)N
+2546(hash)X
+2723(function)X
+3020(supplied)X
+3321(is)X
+3404(the)X
+3532(one)X
+3678(with)X
+3850(which)X
+4076(the)X
+2418 5720(table)N
+2630(was)X
+2811(created.)X
+3139(There)X
+3382(are)X
+3536(a)X
+3627(variety)X
+3905(of)X
+4027(hash)X
+3 f
+432 5960(8)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+9 p
+%%Page: 9 9
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+720 258(Seltzer)N
+977(&)X
+1064(Yigit)X
+3278(A)X
+3356(New)X
+3528(Hashing)X
+3831(Package)X
+4136(for)X
+4259(UNIX)X
+1 f
+720 538(functions)N
+1065(provided)X
+1397(with)X
+1586(the)X
+1731(package.)X
+2082(The)X
+2253(default)X
+720 626(function)N
+1014(for)X
+1135(the)X
+1260(package)X
+1551(is)X
+1631(the)X
+1755(one)X
+1897(which)X
+2119(offered)X
+2378(the)X
+720 714(best)N
+875(performance)X
+1308(in)X
+1396(terms)X
+1600(of)X
+1693(cycles)X
+1920(executed)X
+2232(per)X
+2360(call)X
+720 802(\(it)N
+827(did)X
+965(not)X
+1103(produce)X
+1398(the)X
+1531(fewest)X
+1776(collisions)X
+2117(although)X
+2432(it)X
+720 890(was)N
+866(within)X
+1091(a)X
+1148(small)X
+1341(percentage)X
+1710(of)X
+1797(the)X
+1915(function)X
+2202(that)X
+2342(pro-)X
+720 978(duced)N
+947(the)X
+1080(fewest)X
+1324(collisions\).)X
+1731(Again,)X
+1981(in)X
+2077(time)X
+2253(critical)X
+720 1066(applications,)N
+1152(users)X
+1342(are)X
+1466(encouraged)X
+1862(to)X
+1949(experiment)X
+2334(with)X
+720 1154(a)N
+783(variety)X
+1032(of)X
+1125(hash)X
+1298(functions)X
+1622(to)X
+1710(achieve)X
+1982(optimal)X
+2252(perfor-)X
+720 1242(mance.)N
+10 f
+720 1330 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+7 s
+1038 2925(Full)N
+1149(size)X
+1251(table)X
+1384(\(left\))X
+1547 2718(Fill)N
+1643(Factor)X
+2268 2662(64)N
+1964(32)X
+1674(16)X
+1384(8)X
+1093(4)X
+4 Ds
+1 Dt
+900 2280 MXY
+1548 0 Dl
+900 1879 MXY
+1548 0 Dl
+900 1506 MXY
+1548 0 Dl
+1563 2902 MXY
+111 0 Dl
+-1 Ds
+900 MX
+110 0 Dl
+1425 2828(System)N
+983(User)X
+1895 2778 MXY
+ 1895 2778 lineto
+ 1950 2778 lineto
+ 1950 2833 lineto
+ 1895 2833 lineto
+ 1895 2778 lineto
+closepath 21 1895 2778 1950 2833 Dp
+1342 MX
+ 1342 2778 lineto
+ 1397 2778 lineto
+ 1397 2833 lineto
+ 1342 2833 lineto
+ 1342 2778 lineto
+closepath 14 1342 2778 1397 2833 Dp
+900 MX
+ 900 2778 lineto
+ 955 2778 lineto
+ 955 2833 lineto
+ 900 2833 lineto
+ 900 2778 lineto
+closepath 3 900 2778 955 2833 Dp
+5 Dt
+2283 2211 MXY
+96 0 Dl
+1992 MX
+97 0 Dl
+1702 MX
+97 0 Dl
+1411 2252 MXY
+97 0 Dl
+4 Ds
+1 Dt
+2283 2211 MXY
+ 2283 2211 lineto
+ 2379 2211 lineto
+ 2379 2252 lineto
+ 2283 2252 lineto
+ 2283 2211 lineto
+closepath 14 2283 2211 2379 2252 Dp
+1992 MX
+ 1992 2211 lineto
+ 2089 2211 lineto
+ 2089 2252 lineto
+ 1992 2252 lineto
+ 1992 2211 lineto
+closepath 14 1992 2211 2089 2252 Dp
+1702 MX
+ 1702 2211 lineto
+ 1799 2211 lineto
+ 1799 2252 lineto
+ 1702 2252 lineto
+ 1702 2211 lineto
+closepath 14 1702 2211 1799 2252 Dp
+1411 2252 MXY
+ 1411 2252 lineto
+ 1508 2252 lineto
+ 1508 2294 lineto
+ 1411 2294 lineto
+ 1411 2252 lineto
+closepath 14 1411 2252 1508 2294 Dp
+2283 MX
+ 2283 2252 lineto
+ 2379 2252 lineto
+ 2379 2612 lineto
+ 2283 2612 lineto
+ 2283 2252 lineto
+closepath 3 2283 2252 2379 2612 Dp
+1992 MX
+ 1992 2252 lineto
+ 2089 2252 lineto
+ 2089 2612 lineto
+ 1992 2612 lineto
+ 1992 2252 lineto
+closepath 3 1992 2252 2089 2612 Dp
+1702 MX
+ 1702 2252 lineto
+ 1799 2252 lineto
+ 1799 2612 lineto
+ 1702 2612 lineto
+ 1702 2252 lineto
+closepath 3 1702 2252 1799 2612 Dp
+1411 2294 MXY
+ 1411 2294 lineto
+ 1508 2294 lineto
+ 1508 2612 lineto
+ 1411 2612 lineto
+ 1411 2294 lineto
+closepath 3 1411 2294 1508 2612 Dp
+-1 Ds
+2158 2238 MXY
+ 2158 2238 lineto
+ 2255 2238 lineto
+ 2255 2252 lineto
+ 2158 2252 lineto
+ 2158 2238 lineto
+closepath 21 2158 2238 2255 2252 Dp
+1868 MX
+ 1868 2238 lineto
+ 1965 2238 lineto
+ 1965 2280 lineto
+ 1868 2280 lineto
+ 1868 2238 lineto
+closepath 21 1868 2238 1965 2280 Dp
+1577 MX
+ 1577 2238 lineto
+ 1674 2238 lineto
+ 1674 2308 lineto
+ 1577 2308 lineto
+ 1577 2238 lineto
+closepath 21 1577 2238 1674 2308 Dp
+1287 2308 MXY
+ 1287 2308 lineto
+ 1287 2280 lineto
+ 1384 2280 lineto
+ 1384 2308 lineto
+ 1287 2308 lineto
+closepath 21 1287 2280 1384 2308 Dp
+2158 2280 MXY
+ 2158 2280 lineto
+ 2158 2252 lineto
+ 2255 2252 lineto
+ 2255 2280 lineto
+ 2158 2280 lineto
+closepath 14 2158 2252 2255 2280 Dp
+1868 2308 MXY
+ 1868 2308 lineto
+ 1868 2280 lineto
+ 1965 2280 lineto
+ 1965 2308 lineto
+ 1868 2308 lineto
+closepath 14 1868 2280 1965 2308 Dp
+1577 2335 MXY
+ 1577 2335 lineto
+ 1577 2308 lineto
+ 1674 2308 lineto
+ 1674 2335 lineto
+ 1577 2335 lineto
+closepath 14 1577 2308 1674 2335 Dp
+1287 2363 MXY
+ 1287 2363 lineto
+ 1287 2308 lineto
+ 1384 2308 lineto
+ 1384 2363 lineto
+ 1287 2363 lineto
+closepath 14 1287 2308 1384 2363 Dp
+2158 2280 MXY
+ 2158 2280 lineto
+ 2255 2280 lineto
+ 2255 2612 lineto
+ 2158 2612 lineto
+ 2158 2280 lineto
+closepath 3 2158 2280 2255 2612 Dp
+1868 2308 MXY
+ 1868 2308 lineto
+ 1965 2308 lineto
+ 1965 2612 lineto
+ 1868 2612 lineto
+ 1868 2308 lineto
+closepath 3 1868 2308 1965 2612 Dp
+1577 2335 MXY
+ 1577 2335 lineto
+ 1674 2335 lineto
+ 1674 2612 lineto
+ 1577 2612 lineto
+ 1577 2335 lineto
+closepath 3 1577 2335 1674 2612 Dp
+1287 2363 MXY
+ 1287 2363 lineto
+ 1384 2363 lineto
+ 1384 2612 lineto
+ 1287 2612 lineto
+ 1287 2363 lineto
+closepath 3 1287 2363 1384 2612 Dp
+4 Ds
+1121 2066 MXY
+ 1121 2066 lineto
+ 1218 2066 lineto
+ 1224 2080 lineto
+ 1127 2080 lineto
+ 1121 2066 lineto
+closepath 21 1121 2066 1224 2080 Dp
+2080 MY
+ 1121 2080 lineto
+ 1218 2080 lineto
+ 1218 2273 lineto
+ 1121 2273 lineto
+ 1121 2080 lineto
+closepath 14 1121 2080 1218 2273 Dp
+2273 MY
+ 1121 2273 lineto
+ 1218 2273 lineto
+ 1218 2612 lineto
+ 1121 2612 lineto
+ 1121 2273 lineto
+closepath 3 1121 2273 1218 2612 Dp
+-1 Ds
+997 1589 MXY
+ 997 1589 lineto
+ 1093 1589 lineto
+ 1093 1644 lineto
+ 997 1644 lineto
+ 997 1589 lineto
+closepath 21 997 1589 1093 1644 Dp
+1644 MY
+ 997 1644 lineto
+ 1093 1644 lineto
+ 1093 2280 lineto
+ 997 2280 lineto
+ 997 1644 lineto
+closepath 14 997 1644 1093 2280 Dp
+2280 MY
+ 997 2280 lineto
+ 1093 2280 lineto
+ 1093 2612 lineto
+ 997 2612 lineto
+ 997 2280 lineto
+closepath 3 997 2280 1093 2612 Dp
+10 s
+719 2093(s)N
+712 2037(d)N
+712 1982(n)N
+714 1927(o)N
+716 1872(c)N
+716 1816(e)N
+712 1761(S)N
+804 2286(10)N
+804 1899(20)N
+804 1540(30)N
+3 Dt
+900 1506 MXY
+0 1106 Dl
+1548 0 Dl
+7 s
+1978 2828(Elapsed)N
+1701 2925(Dynamically)N
+2018(grown)X
+2184(table)X
+2317(\(right\))X
+3 Dt
+-1 Ds
+8 s
+720 3180(Figure)N
+934(6:)X
+1 f
+1020(The)X
+1152(total)X
+1299(regions)X
+1520(indicate)X
+1755(the)X
+1865(difference)X
+2154(between)X
+2398(the)X
+720 3268(elapsed)N
+931(time)X
+1065(and)X
+1177(the)X
+1275(sum)X
+1402(of)X
+1475(the)X
+1573(system)X
+1771(and)X
+1883(user)X
+2008(time.)X
+2173(The)X
+2291(left)X
+2395(bar)X
+720 3356(of)N
+798(each)X
+939(set)X
+1035(depicts)X
+1241(the)X
+1344(timing)X
+1537(of)X
+1615(the)X
+1718(test)X
+1831(run)X
+1940(when)X
+2102(the)X
+2204(number)X
+2423(of)X
+720 3444(entries)N
+910(is)X
+973(known)X
+1167(in)X
+1237(advance.)X
+1496(The)X
+1614(right)X
+1754(bars)X
+1879(depict)X
+2054(the)X
+2151(timing)X
+2338(when)X
+720 3532(the)N
+814(\256le)X
+912(is)X
+971(grown)X
+1150(from)X
+1290(a)X
+1334(single)X
+1503(bucket.)X
+10 s
+10 f
+720 3708 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+1 f
+892 3910(Since)N
+1131(this)X
+1307(hashing)X
+1617(package)X
+1942(provides)X
+2279(buffer)X
+720 3998(management,)N
+1188(the)X
+1323(amount)X
+1600(of)X
+1704(space)X
+1920(allocated)X
+2247(for)X
+2378(the)X
+720 4086(buffer)N
+948(pool)X
+1121(may)X
+1290(be)X
+1397(speci\256ed)X
+1713(by)X
+1824(the)X
+1953(user.)X
+2157(Using)X
+2378(the)X
+720 4174(same)N
+910(data)X
+1069(set)X
+1183(and)X
+1324(test)X
+1459(procedure)X
+1805(as)X
+1896(used)X
+2067(to)X
+2153(derive)X
+2378(the)X
+720 4262(graphs)N
+962(in)X
+1052(Figures)X
+1320(5a-c,)X
+1507(Figure)X
+1744(7)X
+1812(shows)X
+2039(the)X
+2164(impact)X
+2409(of)X
+720 4350(varying)N
+997(the)X
+1126(size)X
+1282(of)X
+1380(the)X
+1509(buffer)X
+1737(pool.)X
+1950(The)X
+2106(bucket)X
+2351(size)X
+720 4438(was)N
+873(set)X
+989(to)X
+1078(256)X
+1225(bytes)X
+1421(and)X
+1564(the)X
+1689(\256ll)X
+1804(factor)X
+2019(was)X
+2171(set)X
+2287(to)X
+2376(16.)X
+720 4526(The)N
+869(buffer)X
+1090(pool)X
+1256(size)X
+1404(was)X
+1552(varied)X
+1776(from)X
+1955(0)X
+2018(\(the)X
+2166(minimum)X
+720 4614(number)N
+986(of)X
+1074(pages)X
+1277(required)X
+1565(to)X
+1647(be)X
+1743(buffered\))X
+2063(to)X
+2145(1M.)X
+2316(With)X
+720 4702(1M)N
+854(of)X
+944(buffer)X
+1164(space,)X
+1386(the)X
+1507(package)X
+1794(performed)X
+2151(no)X
+2253(I/O)X
+2382(for)X
+720 4790(this)N
+871(data)X
+1040(set.)X
+1204(As)X
+1328(Figure)X
+1572(7)X
+1647(illustrates,)X
+2013(increasing)X
+2378(the)X
+720 4878(buffer)N
+944(pool)X
+1113(size)X
+1265(can)X
+1404(have)X
+1583(a)X
+1646(dramatic)X
+1954(affect)X
+2165(on)X
+2271(result-)X
+720 4966(ing)N
+842(performance.)X
+2 f
+8 s
+1269 4941(7)N
+1 f
+16 s
+720 5353 MXY
+864 0 Dl
+2 f
+8 s
+760 5408(7)N
+1 f
+9 s
+826 5433(Some)N
+1024(allocators)X
+1338(are)X
+1460(extremely)X
+1782(inef\256cient)X
+2107(at)X
+2192(allocating)X
+720 5513(memory.)N
+1029(If)X
+1110(you)X
+1251(\256nd)X
+1396(that)X
+1536(applications)X
+1916(are)X
+2036(running)X
+2292(out)X
+2416(of)X
+720 5593(memory)N
+1005(before)X
+1234(you)X
+1386(think)X
+1578(they)X
+1746(should,)X
+2000(try)X
+2124(varying)X
+2388(the)X
+720 5673(pagesize)N
+986(to)X
+1060(get)X
+1166(better)X
+1348(utilization)X
+1658(from)X
+1816(the)X
+1922(memory)X
+2180(allocator.)X
+10 s
+2830 1975 MXY
+0 -28 Dl
+28 0 Dl
+0 28 Dl
+-28 0 Dl
+2853 2004 MXY
+0 -27 Dl
+28 0 Dl
+0 27 Dl
+-28 0 Dl
+2876 2016 MXY
+0 -27 Dl
+27 0 Dl
+0 27 Dl
+-27 0 Dl
+2922 1998 MXY
+0 -27 Dl
+27 0 Dl
+0 27 Dl
+-27 0 Dl
+2967 2025 MXY
+0 -28 Dl
+28 0 Dl
+0 28 Dl
+-28 0 Dl
+3013 2031 MXY
+0 -28 Dl
+28 0 Dl
+0 28 Dl
+-28 0 Dl
+3059 MX
+0 -28 Dl
+27 0 Dl
+0 28 Dl
+-27 0 Dl
+3196 2052 MXY
+0 -28 Dl
+27 0 Dl
+0 28 Dl
+-27 0 Dl
+3561 2102 MXY
+0 -28 Dl
+28 0 Dl
+0 28 Dl
+-28 0 Dl
+4292 2105 MXY
+0 -28 Dl
+27 0 Dl
+0 28 Dl
+-27 0 Dl
+4 Ds
+1 Dt
+2844 1961 MXY
+23 30 Dl
+23 12 Dl
+45 -18 Dl
+46 26 Dl
+46 6 Dl
+45 0 Dl
+137 21 Dl
+366 50 Dl
+730 3 Dl
+9 s
+4227 2158(User)N
+-1 Ds
+3 Dt
+2830 1211 MXY
+27 Dc
+2853 1261 MXY
+27 Dc
+2876 1267 MXY
+27 Dc
+2921 1341 MXY
+27 Dc
+2967 1385 MXY
+27 Dc
+3013 1450 MXY
+27 Dc
+3059 1497 MXY
+27 Dc
+3196 1686 MXY
+27 Dc
+3561 2109 MXY
+27 Dc
+4292 2295 MXY
+27 Dc
+20 Ds
+1 Dt
+2844 1211 MXY
+23 50 Dl
+23 6 Dl
+45 74 Dl
+46 44 Dl
+46 65 Dl
+45 47 Dl
+137 189 Dl
+366 423 Dl
+730 186 Dl
+4181 2270(System)N
+-1 Ds
+3 Dt
+2844 583 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2867 672 MXY
+0 27 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+2890 701 MXY
+0 28 Dl
+0 -14 Dl
+13 0 Dl
+-27 0 Dl
+2935 819 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-27 0 Dl
+2981 849 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+3027 908 MXY
+0 27 Dl
+0 -13 Dl
+14 0 Dl
+-28 0 Dl
+3072 1026 MXY
+0 27 Dl
+0 -13 Dl
+14 0 Dl
+-27 0 Dl
+3209 1292 MXY
+0 27 Dl
+0 -14 Dl
+14 0 Dl
+-27 0 Dl
+3575 1823 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-28 0 Dl
+4305 2059 MXY
+0 28 Dl
+0 -14 Dl
+14 0 Dl
+-27 0 Dl
+5 Dt
+2844 597 MXY
+23 88 Dl
+23 30 Dl
+45 118 Dl
+46 30 Dl
+46 59 Dl
+45 118 Dl
+137 265 Dl
+366 532 Dl
+730 236 Dl
+4328 2103(Total)N
+2844 2310 MXY
+1461 0 Dl
+2844 MX
+0 -1772 Dl
+2310 MY
+0 18 Dl
+4 Ds
+1 Dt
+2310 MY
+0 -1772 Dl
+2826 2416(0)N
+-1 Ds
+5 Dt
+3209 2310 MXY
+0 18 Dl
+4 Ds
+1 Dt
+2310 MY
+0 -1772 Dl
+3155 2416(256)N
+-1 Ds
+5 Dt
+3575 2310 MXY
+0 18 Dl
+4 Ds
+1 Dt
+2310 MY
+0 -1772 Dl
+3521 2416(512)N
+-1 Ds
+5 Dt
+3940 2310 MXY
+0 18 Dl
+4 Ds
+1 Dt
+2310 MY
+0 -1772 Dl
+3886 2416(768)N
+-1 Ds
+5 Dt
+4305 2310 MXY
+0 18 Dl
+4 Ds
+1 Dt
+2310 MY
+0 -1772 Dl
+4233 2416(1024)N
+-1 Ds
+5 Dt
+2844 2310 MXY
+-18 0 Dl
+4 Ds
+1 Dt
+2844 MX
+1461 0 Dl
+2771 2340(0)N
+-1 Ds
+5 Dt
+2844 2014 MXY
+-18 0 Dl
+2844 1719 MXY
+-18 0 Dl
+4 Ds
+1 Dt
+2844 MX
+1461 0 Dl
+2735 1749(20)N
+-1 Ds
+5 Dt
+2844 1423 MXY
+-18 0 Dl
+2844 1128 MXY
+-18 0 Dl
+4 Ds
+1 Dt
+2844 MX
+1461 0 Dl
+2735 1158(40)N
+-1 Ds
+5 Dt
+2844 833 MXY
+-18 0 Dl
+2844 538 MXY
+-18 0 Dl
+4 Ds
+1 Dt
+2844 MX
+1461 0 Dl
+2735 568(60)N
+3239 2529(Buffer)N
+3445(Pool)X
+3595(Size)X
+3737(\(in)X
+3835(K\))X
+2695 1259(S)N
+2699 1324(e)N
+2699 1388(c)N
+2697 1452(o)N
+2697 1517(n)N
+2697 1581(d)N
+2701 1645(s)N
+3 Dt
+-1 Ds
+3 f
+8 s
+2706 2773(Figure)N
+2908(7:)X
+1 f
+2982(User)X
+3123(time)X
+3258(is)X
+3322(virtually)X
+3560(insensitive)X
+3854(to)X
+3924(the)X
+4022(amount)X
+4234(of)X
+4307(buffer)X
+2706 2861(pool)N
+2852(available,)X
+3130(however,)X
+3396(both)X
+3541(system)X
+3750(time)X
+3895(and)X
+4018(elapsed)X
+4240(time)X
+4385(are)X
+2706 2949(inversely)N
+2960(proportional)X
+3296(to)X
+3366(the)X
+3464(size)X
+3583(of)X
+3656(the)X
+3753(buffer)X
+3927(pool.)X
+4092(Even)X
+4242(for)X
+4335(large)X
+2706 3037(data)N
+2831(sets)X
+2946(where)X
+3120(one)X
+3230(expects)X
+3439(few)X
+3552(collisions,)X
+3832(specifying)X
+4116(a)X
+4162(large)X
+4307(buffer)X
+2706 3125(pool)N
+2836(dramatically)X
+3171(improves)X
+3425(performance.)X
+10 s
+10 f
+2706 3301 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+3175 3543(Enhanced)N
+3536(Functionality)X
+1 f
+2878 3675(This)N
+3046(hashing)X
+3320(package)X
+3609(provides)X
+3910(a)X
+3971(set)X
+4085(of)X
+4177(compati-)X
+2706 3763(bility)N
+2895(routines)X
+3174(to)X
+3257(implement)X
+3620(the)X
+2 f
+3739(ndbm)X
+1 f
+3937(interface.)X
+4279(How-)X
+2706 3851(ever,)N
+2893(when)X
+3095(the)X
+3220(native)X
+3443(interface)X
+3752(is)X
+3832(used,)X
+4026(the)X
+4151(following)X
+2706 3939(additional)N
+3046(functionality)X
+3475(is)X
+3548(provided:)X
+10 f
+2798 4071(g)N
+1 f
+2946(Inserts)X
+3197(never)X
+3413(fail)X
+3556(because)X
+3847(too)X
+3985(many)X
+4199(keys)X
+2946 4159(hash)N
+3113(to)X
+3195(the)X
+3313(same)X
+3498(value.)X
+10 f
+2798 4247(g)N
+1 f
+2946(Inserts)X
+3187(never)X
+3393(fail)X
+3527(because)X
+3808(key)X
+3950(and/or)X
+4181(asso-)X
+2946 4335(ciated)N
+3158(data)X
+3312(is)X
+3385(too)X
+3507(large)X
+10 f
+2798 4423(g)N
+1 f
+2946(Hash)X
+3131(functions)X
+3449(may)X
+3607(be)X
+3703(user-speci\256ed.)X
+10 f
+2798 4511(g)N
+1 f
+2946(Multiple)X
+3268(pages)X
+3498(may)X
+3683(be)X
+3806(cached)X
+4077(in)X
+4186(main)X
+2946 4599(memory.)N
+2706 4731(It)N
+2801(also)X
+2976(provides)X
+3298(a)X
+3380(set)X
+3514(of)X
+3626(compatibility)X
+4097(routines)X
+4400(to)X
+2706 4819(implement)N
+3087(the)X
+2 f
+3224(hsearch)X
+1 f
+3516(interface.)X
+3876(Again,)X
+4130(the)X
+4266(native)X
+2706 4907(interface)N
+3008(offers)X
+3216(enhanced)X
+3540(functionality:)X
+10 f
+2798 5039(g)N
+1 f
+2946(Files)X
+3121(may)X
+3279(grow)X
+3464(beyond)X
+2 f
+3720(nelem)X
+1 f
+3932(elements.)X
+10 f
+2798 5127(g)N
+1 f
+2946(Multiple)X
+3247(hash)X
+3420(tables)X
+3632(may)X
+3795(be)X
+3896(accessed)X
+4203(con-)X
+2946 5215(currently.)N
+10 f
+2798 5303(g)N
+1 f
+2946(Hash)X
+3134(tables)X
+3344(may)X
+3505(be)X
+3604(stored)X
+3823(and)X
+3962(accessed)X
+4266(on)X
+2946 5391(disk.)N
+10 f
+2798 5479(g)N
+1 f
+2946(Hash)X
+3155(functions)X
+3497(may)X
+3679(be)X
+3799(user-speci\256ed)X
+4288(at)X
+2946 5567(runtime.)N
+3 f
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+4424(9)X
+
+10 p
+%%Page: 10 10
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+432 258(A)N
+510(New)X
+682(Hashing)X
+985(Package)X
+1290(for)X
+1413(UNIX)X
+3663(Seltzer)X
+3920(&)X
+4007(Yigit)X
+459 538(Relative)N
+760(Performance)X
+1227(of)X
+1314(the)X
+1441(New)X
+1613(Implementation)X
+1 f
+604 670(The)N
+761(performance)X
+1200(testing)X
+1445(of)X
+1544(the)X
+1674(new)X
+1840(package)X
+2135(is)X
+432 758(divided)N
+711(into)X
+874(two)X
+1033(test)X
+1183(suites.)X
+1424(The)X
+1588(\256rst)X
+1751(suite)X
+1941(of)X
+2046(tests)X
+432 846(requires)N
+727(that)X
+882(the)X
+1015(tables)X
+1237(be)X
+1348(read)X
+1522(from)X
+1713(and)X
+1864(written)X
+2126(to)X
+432 934(disk.)N
+640(In)X
+742(these)X
+942(tests,)X
+1139(the)X
+1272(basis)X
+1467(for)X
+1595(comparison)X
+2003(is)X
+2090(the)X
+432 1022(4.3BSD-Reno)N
+908(version)X
+1169(of)X
+2 f
+1260(ndbm)X
+1 f
+1438(.)X
+1502(Based)X
+1722(on)X
+1826(the)X
+1948(designs)X
+432 1110(of)N
+2 f
+521(sdbm)X
+1 f
+712(and)X
+2 f
+850(gdbm)X
+1 f
+1028(,)X
+1070(they)X
+1230(are)X
+1351(expected)X
+1659(to)X
+1743(perform)X
+2024(simi-)X
+432 1198(larly)N
+605(to)X
+2 f
+693(ndbm)X
+1 f
+871(,)X
+917(and)X
+1059(we)X
+1179(do)X
+1285(not)X
+1413(show)X
+1608(their)X
+1781(performance)X
+432 1286(numbers.)N
+800(The)X
+977(second)X
+1252(suite)X
+1454(contains)X
+1772(the)X
+1921(memory)X
+432 1374(resident)N
+712(test)X
+849(which)X
+1071(does)X
+1243(not)X
+1370(require)X
+1623(that)X
+1768(the)X
+1891(\256les)X
+2049(ever)X
+432 1462(be)N
+533(written)X
+784(to)X
+870(disk,)X
+1047(only)X
+1213(that)X
+1357(hash)X
+1528(tables)X
+1739(may)X
+1901(be)X
+2001(mani-)X
+432 1550(pulated)N
+692(in)X
+778(main)X
+961(memory.)X
+1291(In)X
+1381(this)X
+1519(test,)X
+1673(we)X
+1790(compare)X
+2090(the)X
+432 1638(performance)N
+859(to)X
+941(that)X
+1081(of)X
+1168(the)X
+2 f
+1286(hsearch)X
+1 f
+1560(routines.)X
+604 1752(For)N
+760(both)X
+947(suites,)X
+1194(two)X
+1358(different)X
+1679(databases)X
+2031(were)X
+432 1840(used.)N
+656(The)X
+818(\256rst)X
+979(is)X
+1069(the)X
+1204(dictionary)X
+1566(database)X
+1880(described)X
+432 1928(previously.)N
+836(The)X
+987(second)X
+1236(was)X
+1386(constructed)X
+1781(from)X
+1962(a)X
+2023(pass-)X
+432 2016(word)N
+647(\256le)X
+799(with)X
+990(approximately)X
+1502(300)X
+1671(accounts.)X
+2041(Two)X
+432 2104(records)N
+700(were)X
+887(constructed)X
+1287(for)X
+1411(each)X
+1589(account.)X
+1909(The)X
+2064(\256rst)X
+432 2192(used)N
+604(the)X
+727(logname)X
+1028(as)X
+1120(the)X
+1243(key)X
+1384(and)X
+1525(the)X
+1648(remainder)X
+1999(of)X
+2090(the)X
+432 2280(password)N
+768(entry)X
+965(for)X
+1091(the)X
+1221(data.)X
+1427(The)X
+1584(second)X
+1839(was)X
+1996(keyed)X
+432 2368(by)N
+541(uid)X
+672(and)X
+817(contained)X
+1157(the)X
+1283(entire)X
+1494(password)X
+1825(entry)X
+2018(as)X
+2113(its)X
+432 2456(data)N
+589(\256eld.)X
+794(The)X
+942(tests)X
+1107(were)X
+1287(all)X
+1389(run)X
+1518(on)X
+1620(the)X
+1740(HP)X
+1864(9000)X
+2046(with)X
+432 2544(the)N
+574(same)X
+783(con\256guration)X
+1254(previously)X
+1636(described.)X
+2027(Each)X
+432 2632(test)N
+576(was)X
+734(run)X
+874(\256ve)X
+1027(times)X
+1232(and)X
+1380(the)X
+1510(timing)X
+1750(results)X
+1991(of)X
+2090(the)X
+432 2720(runs)N
+602(were)X
+791(averaged.)X
+1154(The)X
+1311(variance)X
+1616(across)X
+1849(the)X
+1979(5)X
+2050(runs)X
+432 2808(was)N
+591(approximately)X
+1088(1%)X
+1229(of)X
+1330(the)X
+1462(average)X
+1746(yielding)X
+2041(95%)X
+432 2896(con\256dence)N
+800(intervals)X
+1096(of)X
+1183(approximately)X
+1666(2%.)X
+3 f
+1021 3050(Disk)N
+1196(Based)X
+1420(Tests)X
+1 f
+604 3182(In)N
+693(these)X
+880(tests,)X
+1064(we)X
+1180(use)X
+1308(a)X
+1365(bucket)X
+1600(size)X
+1746(of)X
+1834(1024)X
+2015(and)X
+2152(a)X
+432 3270(\256ll)N
+540(factor)X
+748(of)X
+835(32.)X
+3 f
+432 3384(create)N
+663(test)X
+1 f
+547 3498(The)N
+703(keys)X
+881(are)X
+1011(entered)X
+1279(into)X
+1433(the)X
+1561(hash)X
+1738(table,)X
+1944(and)X
+2090(the)X
+547 3586(\256le)N
+669(is)X
+742(\257ushed)X
+993(to)X
+1075(disk.)X
+3 f
+432 3700(read)N
+608(test)X
+1 f
+547 3814(A)N
+640(lookup)X
+897(is)X
+984(performed)X
+1353(for)X
+1481(each)X
+1663(key)X
+1813(in)X
+1909(the)X
+2041(hash)X
+547 3902(table.)N
+3 f
+432 4016(verify)N
+653(test)X
+1 f
+547 4130(A)N
+640(lookup)X
+897(is)X
+984(performed)X
+1353(for)X
+1481(each)X
+1663(key)X
+1813(in)X
+1909(the)X
+2041(hash)X
+547 4218(table,)N
+759(and)X
+911(the)X
+1045(data)X
+1215(returned)X
+1519(is)X
+1608(compared)X
+1961(against)X
+547 4306(that)N
+687(originally)X
+1018(stored)X
+1234(in)X
+1316(the)X
+1434(hash)X
+1601(table.)X
+3 f
+432 4420(sequential)N
+798(retrieve)X
+1 f
+547 4534(All)N
+674(keys)X
+846(are)X
+970(retrieved)X
+1281(in)X
+1367(sequential)X
+1716(order)X
+1910(from)X
+2090(the)X
+547 4622(hash)N
+724(table.)X
+950(The)X
+2 f
+1105(ndbm)X
+1 f
+1313(interface)X
+1625(allows)X
+1863(sequential)X
+547 4710(retrieval)N
+848(of)X
+948(the)X
+1079(keys)X
+1259(from)X
+1448(the)X
+1578(database,)X
+1907(but)X
+2041(does)X
+547 4798(not)N
+701(return)X
+945(the)X
+1094(data)X
+1279(associated)X
+1660(with)X
+1853(each)X
+2052(key.)X
+547 4886(Therefore,)N
+929(we)X
+1067(compare)X
+1388(the)X
+1530(performance)X
+1980(of)X
+2090(the)X
+547 4974(new)N
+703(package)X
+989(to)X
+1073(two)X
+1215(different)X
+1514(runs)X
+1674(of)X
+2 f
+1763(ndbm)X
+1 f
+1941(.)X
+2002(In)X
+2090(the)X
+547 5062(\256rst)N
+697(case,)X
+2 f
+882(ndbm)X
+1 f
+1086(returns)X
+1335(only)X
+1503(the)X
+1627(keys)X
+1800(while)X
+2003(in)X
+2090(the)X
+547 5150(second,)N
+2 f
+823(ndbm)X
+1 f
+1034(returns)X
+1290(both)X
+1465(the)X
+1596(keys)X
+1776(and)X
+1924(the)X
+2054(data)X
+547 5238(\(requiring)N
+894(a)X
+956(second)X
+1204(call)X
+1345(to)X
+1432(the)X
+1555(library\).)X
+1861(There)X
+2074(is)X
+2152(a)X
+547 5326(single)N
+764(run)X
+897(for)X
+1017(the)X
+1141(new)X
+1300(library)X
+1539(since)X
+1729(it)X
+1798(returns)X
+2046(both)X
+547 5414(the)N
+665(key)X
+801(and)X
+937(the)X
+1055(data.)X
+3 f
+3014 538(In-Memory)N
+3431(Test)X
+1 f
+2590 670(This)N
+2757(test)X
+2892(uses)X
+3054(a)X
+3114(bucket)X
+3352(size)X
+3501(of)X
+3592(256)X
+3736(and)X
+3876(a)X
+3936(\256ll)X
+4048(fac-)X
+2418 758(tor)N
+2527(of)X
+2614(8.)X
+3 f
+2418 872(create/read)N
+2827(test)X
+1 f
+2533 986(In)N
+2627(this)X
+2769(test,)X
+2927(a)X
+2989(hash)X
+3162(table)X
+3344(is)X
+3423(created)X
+3682(by)X
+3788(inserting)X
+4094(all)X
+2533 1074(the)N
+2660(key/data)X
+2961(pairs.)X
+3186(Then)X
+3380(a)X
+3445(keyed)X
+3666(retrieval)X
+3963(is)X
+4044(per-)X
+2533 1162(formed)N
+2801(for)X
+2931(each)X
+3115(pair,)X
+3295(and)X
+3446(the)X
+3579(hash)X
+3761(table)X
+3952(is)X
+4040(des-)X
+2533 1250(troyed.)N
+3 f
+2938 1404(Performance)N
+3405(Results)X
+1 f
+2590 1536(Figures)N
+2866(8a)X
+2978(and)X
+3130(8b)X
+3246(show)X
+3451(the)X
+3585(user)X
+3755(time,)X
+3952(system)X
+2418 1624(time,)N
+2608(and)X
+2752(elapsed)X
+3021(time)X
+3191(for)X
+3312(each)X
+3487(test)X
+3625(for)X
+3746(both)X
+3915(the)X
+4040(new)X
+2418 1712(implementation)N
+2951(and)X
+3098(the)X
+3227(old)X
+3360(implementation)X
+3893(\()X
+2 f
+3920(hsearch)X
+1 f
+2418 1800(or)N
+2 f
+2528(ndbm)X
+1 f
+2706(,)X
+2769(whichever)X
+3147(is)X
+3243(appropriate\))X
+3678(as)X
+3787(well)X
+3967(as)X
+4076(the)X
+2418 1888(improvement.)N
+2929(The)X
+3098(improvement)X
+3569(is)X
+3666(expressed)X
+4027(as)X
+4138(a)X
+2418 1976(percentage)N
+2787(of)X
+2874(the)X
+2992(old)X
+3114(running)X
+3383(time:)X
+0 f
+8 s
+2418 2275(%)N
+2494(=)X
+2570(100)X
+2722(*)X
+2798 -0.4219(\(old_time)AX
+3178(-)X
+3254 -0.4219(new_time\))AX
+3634(/)X
+3710(old_time)X
+1 f
+10 s
+2590 2600(In)N
+2700(nearly)X
+2944(all)X
+3067(cases,)X
+3299(the)X
+3439(new)X
+3615(routines)X
+3915(perform)X
+2418 2688(better)N
+2628(than)X
+2793(the)X
+2918(old)X
+3047(routines)X
+3332(\(both)X
+2 f
+3527(hsearch)X
+1 f
+3807(and)X
+2 f
+3949(ndbm)X
+1 f
+4127(\).)X
+2418 2776(Although)N
+2755(the)X
+3 f
+2888(create)X
+1 f
+3134(tests)X
+3311(exhibit)X
+3567(superior)X
+3864(user)X
+4032(time)X
+2418 2864(performance,)N
+2869(the)X
+2991(test)X
+3126(time)X
+3292(is)X
+3369(dominated)X
+3731(by)X
+3834(the)X
+3955(cost)X
+4107(of)X
+2418 2952(writing)N
+2677(the)X
+2803(actual)X
+3023(\256le)X
+3153(to)X
+3243(disk.)X
+3444(For)X
+3583(the)X
+3709(large)X
+3897(database)X
+2418 3040(\(the)N
+2564(dictionary\),)X
+2957(this)X
+3093(completely)X
+3470(overwhelmed)X
+3927(the)X
+4045(sys-)X
+2418 3128(tem)N
+2570(time.)X
+2783(However,)X
+3129(for)X
+3254(the)X
+3383(small)X
+3587(data)X
+3752(base,)X
+3946(we)X
+4071(see)X
+2418 3216(that)N
+2569(differences)X
+2958(in)X
+3051(both)X
+3224(user)X
+3389(and)X
+3536(system)X
+3788(time)X
+3960(contri-)X
+2418 3304(bute)N
+2576(to)X
+2658(the)X
+2776(superior)X
+3059(performance)X
+3486(of)X
+3573(the)X
+3691(new)X
+3845(package.)X
+2590 3418(The)N
+3 f
+2764(read)X
+1 f
+2920(,)X
+3 f
+2989(verify)X
+1 f
+3190(,)X
+3259(and)X
+3 f
+3424(sequential)X
+1 f
+3818(results)X
+4075(are)X
+2418 3506(deceptive)N
+2758(for)X
+2883(the)X
+3012(small)X
+3216(database)X
+3524(since)X
+3720(the)X
+3849(entire)X
+4063(test)X
+2418 3594(ran)N
+2551(in)X
+2643(under)X
+2856(a)X
+2922(second.)X
+3215(However,)X
+3560(on)X
+3669(the)X
+3796(larger)X
+4013(data-)X
+2418 3682(base)N
+2590(the)X
+3 f
+2716(read)X
+1 f
+2900(and)X
+3 f
+3044(verify)X
+1 f
+3273(tests)X
+3443(bene\256t)X
+3689(from)X
+3873(the)X
+3999(cach-)X
+2418 3770(ing)N
+2546(of)X
+2639(buckets)X
+2910(in)X
+2998(the)X
+3122(new)X
+3282(package)X
+3571(to)X
+3658(improve)X
+3950(perfor-)X
+2418 3858(mance)N
+2666(by)X
+2784(over)X
+2965(80%.)X
+3169(Since)X
+3384(the)X
+3519(\256rst)X
+3 f
+3680(sequential)X
+1 f
+4063(test)X
+2418 3946(does)N
+2598(not)X
+2733(require)X
+2 f
+2994(ndbm)X
+1 f
+3205(to)X
+3299(return)X
+3523(the)X
+3653(data)X
+3819(values,)X
+4076(the)X
+2418 4034(user)N
+2573(time)X
+2735(is)X
+2808(lower)X
+3011(than)X
+3169(for)X
+3283(the)X
+3401(new)X
+3555(package.)X
+3879(However)X
+2418 4122(when)N
+2613(we)X
+2728(require)X
+2977(both)X
+3139(packages)X
+3454(to)X
+3536(return)X
+3748(data,)X
+3922(the)X
+4040(new)X
+2418 4210(package)N
+2702(excels)X
+2923(in)X
+3005(all)X
+3105(three)X
+3286(timings.)X
+2590 4324(The)N
+2773(small)X
+3003(database)X
+3337(runs)X
+3532(so)X
+3660(quickly)X
+3957(in)X
+4076(the)X
+2418 4412(memory-resident)N
+3000(case)X
+3173(that)X
+3326(the)X
+3457(results)X
+3699(are)X
+3831(uninterest-)X
+2418 4500(ing.)N
+2589(However,)X
+2933(for)X
+3056(the)X
+3183(larger)X
+3400(database)X
+3706(the)X
+3833(new)X
+3995(pack-)X
+2418 4588(age)N
+2567(pays)X
+2751(a)X
+2824(small)X
+3033(penalty)X
+3305(in)X
+3403(system)X
+3661(time)X
+3839(because)X
+4130(it)X
+2418 4676(limits)N
+2636(its)X
+2748(main)X
+2944(memory)X
+3247(utilization)X
+3607(and)X
+3759(swaps)X
+3991(pages)X
+2418 4764(out)N
+2550(to)X
+2642(temporary)X
+3002(storage)X
+3264(in)X
+3356(the)X
+3484(\256le)X
+3616(system)X
+3868(while)X
+4076(the)X
+2 f
+2418 4852(hsearch)N
+1 f
+2698(package)X
+2988(requires)X
+3273(that)X
+3419(the)X
+3543(application)X
+3924(allocate)X
+2418 4940(enough)N
+2692(space)X
+2909(for)X
+3041(all)X
+3159(key/data)X
+3468(pair.)X
+3670(However,)X
+4022(even)X
+2418 5028(with)N
+2600(the)X
+2738(system)X
+3000(time)X
+3182(penalty,)X
+3477(the)X
+3614(resulting)X
+3933(elapsed)X
+2418 5116(time)N
+2580(improves)X
+2898(by)X
+2998(over)X
+3161(50%.)X
+3 f
+432 5960(10)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+11 p
+%%Page: 11 11
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+720 258(Seltzer)N
+977(&)X
+1064(Yigit)X
+3278(A)X
+3356(New)X
+3528(Hashing)X
+3831(Package)X
+4136(for)X
+4259(UNIX)X
+1 f
+10 f
+908 454(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2 f
+1379 546(hash)N
+1652(ndbm)X
+1950(%change)X
+1 f
+10 f
+908 550(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+948 642(CREATE)N
+10 f
+908 646(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+1125 738(user)N
+1424(6.4)X
+1671(12.2)X
+2073(48)X
+1157 826(sys)N
+1384(32.5)X
+1671(34.7)X
+2113(6)X
+3 f
+1006 914(elapsed)N
+10 f
+1310 922(c)N
+890(c)Y
+810(c)Y
+730(c)Y
+3 f
+1384 914(90.4)N
+10 f
+1581 922(c)N
+890(c)Y
+810(c)Y
+730(c)Y
+3 f
+1671 914(99.6)N
+10 f
+1883 922(c)N
+890(c)Y
+810(c)Y
+730(c)Y
+3 f
+2113 914(9)N
+1 f
+10 f
+908 910(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+908 926(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+948 1010(READ)N
+10 f
+908 1014(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+1125 1106(user)N
+1424(3.4)X
+1711(6.1)X
+2073(44)X
+1157 1194(sys)N
+1424(1.2)X
+1671(15.3)X
+2073(92)X
+3 f
+1006 1282(elapsed)N
+10 f
+1310 1290(c)N
+1258(c)Y
+1178(c)Y
+1098(c)Y
+3 f
+1424 1282(4.0)N
+10 f
+1581 1290(c)N
+1258(c)Y
+1178(c)Y
+1098(c)Y
+3 f
+1671 1282(21.2)N
+10 f
+1883 1290(c)N
+1258(c)Y
+1178(c)Y
+1098(c)Y
+3 f
+2073 1282(81)N
+1 f
+10 f
+908 1278(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+908 1294(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+948 1378(VERIFY)N
+10 f
+908 1382(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+1125 1474(user)N
+1424(3.5)X
+1711(6.3)X
+2073(44)X
+1157 1562(sys)N
+1424(1.2)X
+1671(15.3)X
+2073(92)X
+3 f
+1006 1650(elapsed)N
+10 f
+1310 1658(c)N
+1626(c)Y
+1546(c)Y
+1466(c)Y
+3 f
+1424 1650(4.0)N
+10 f
+1581 1658(c)N
+1626(c)Y
+1546(c)Y
+1466(c)Y
+3 f
+1671 1650(21.2)N
+10 f
+1883 1658(c)N
+1626(c)Y
+1546(c)Y
+1466(c)Y
+3 f
+2073 1650(81)N
+1 f
+10 f
+908 1646(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+908 1662(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+948 1746(SEQUENTIAL)N
+10 f
+908 1750(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+1125 1842(user)N
+1424(2.7)X
+1711(1.9)X
+2046(-42)X
+1157 1930(sys)N
+1424(0.7)X
+1711(3.9)X
+2073(82)X
+3 f
+1006 2018(elapsed)N
+10 f
+1310 2026(c)N
+1994(c)Y
+1914(c)Y
+1834(c)Y
+3 f
+1424 2018(3.0)N
+10 f
+1581 2026(c)N
+1994(c)Y
+1914(c)Y
+1834(c)Y
+3 f
+1711 2018(5.0)N
+10 f
+1883 2026(c)N
+1994(c)Y
+1914(c)Y
+1834(c)Y
+3 f
+2073 2018(40)N
+1 f
+10 f
+908 2014(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+908 2030(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+948 2114(SEQUENTIAL)N
+1467(\(with)X
+1656(data)X
+1810(retrieval\))X
+10 f
+908 2118(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+1125 2210(user)N
+1424(2.7)X
+1711(8.2)X
+2073(67)X
+1157 2298(sys)N
+1424(0.7)X
+1711(4.3)X
+2073(84)X
+3 f
+1006 2386(elapsed)N
+1424(3.0)X
+1671(12.0)X
+2073(75)X
+1 f
+10 f
+908 2390(i)N
+927(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+899 2394(c)N
+2378(c)Y
+2298(c)Y
+2218(c)Y
+2138(c)Y
+2058(c)Y
+1978(c)Y
+1898(c)Y
+1818(c)Y
+1738(c)Y
+1658(c)Y
+1578(c)Y
+1498(c)Y
+1418(c)Y
+1338(c)Y
+1258(c)Y
+1178(c)Y
+1098(c)Y
+1018(c)Y
+938(c)Y
+858(c)Y
+778(c)Y
+698(c)Y
+618(c)Y
+538(c)Y
+1310 2394(c)N
+2362(c)Y
+2282(c)Y
+2202(c)Y
+1581 2394(c)N
+2362(c)Y
+2282(c)Y
+2202(c)Y
+1883 2394(c)N
+2362(c)Y
+2282(c)Y
+2202(c)Y
+2278 2394(c)N
+2378(c)Y
+2298(c)Y
+2218(c)Y
+2138(c)Y
+2058(c)Y
+1978(c)Y
+1898(c)Y
+1818(c)Y
+1738(c)Y
+1658(c)Y
+1578(c)Y
+1498(c)Y
+1418(c)Y
+1338(c)Y
+1258(c)Y
+1178(c)Y
+1098(c)Y
+1018(c)Y
+938(c)Y
+858(c)Y
+778(c)Y
+698(c)Y
+618(c)Y
+538(c)Y
+905 2574(i)N
+930(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2 f
+1318 2666(hash)N
+1585(hsearch)X
+1953(%change)X
+1 f
+10 f
+905 2670(i)N
+930(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+945 2762(CREATE/READ)N
+10 f
+905 2766(i)N
+930(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+1064 2858(user)N
+1343(6.6)X
+1642(17.2)X
+2096(62)X
+1096 2946(sys)N
+1343(1.1)X
+1682(0.3)X
+2029(-266)X
+3 f
+945 3034(elapsed)N
+1343(7.8)X
+1642(17.0)X
+2096(54)X
+1 f
+10 f
+905 3038(i)N
+930(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+896 3050(c)N
+2978(c)Y
+2898(c)Y
+2818(c)Y
+2738(c)Y
+2658(c)Y
+1249 3034(c)N
+3010(c)Y
+2930(c)Y
+2850(c)Y
+1520 3034(c)N
+3010(c)Y
+2930(c)Y
+2850(c)Y
+1886 3034(c)N
+3010(c)Y
+2930(c)Y
+2850(c)Y
+2281 3050(c)N
+2978(c)Y
+2898(c)Y
+2818(c)Y
+2738(c)Y
+2658(c)Y
+3 f
+720 3174(Figure)N
+967(8a:)X
+1 f
+1094(Timing)X
+1349(results)X
+1578(for)X
+1692(the)X
+1810(dictionary)X
+2155(database.)X
+10 f
+720 3262 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+1407 3504(Conclusion)N
+1 f
+892 3636(This)N
+1063(paper)X
+1271(has)X
+1407(presented)X
+1744(the)X
+1871(design,)X
+2129(implemen-)X
+720 3724(tation)N
+928(and)X
+1070(performance)X
+1503(of)X
+1596(a)X
+1658(new)X
+1818(hashing)X
+2093(package)X
+2382(for)X
+720 3812(UNIX.)N
+993(The)X
+1150(new)X
+1316(package)X
+1612(provides)X
+1919(a)X
+1986(superset)X
+2280(of)X
+2378(the)X
+720 3900(functionality)N
+1159(of)X
+1255(existing)X
+1537(hashing)X
+1815(packages)X
+2139(and)X
+2284(incor-)X
+720 3988(porates)N
+975(additional)X
+1318(features)X
+1596(such)X
+1766(as)X
+1855(large)X
+2038(key)X
+2176(handling,)X
+720 4076(user)N
+876(de\256ned)X
+1134(hash)X
+1302(functions,)X
+1641(multiple)X
+1928(hash)X
+2096(tables,)X
+2324(vari-)X
+720 4164(able)N
+894(sized)X
+1099(pages,)X
+1342(and)X
+1498(linear)X
+1721(hashing.)X
+2050(In)X
+2156(nearly)X
+2396(all)X
+720 4252(cases,)N
+954(the)X
+1096(new)X
+1274(package)X
+1582(provides)X
+1902(improved)X
+2252(perfor-)X
+720 4340(mance)N
+974(on)X
+1098(the)X
+1240(order)X
+1454(of)X
+1565(50-80%)X
+1863(for)X
+2001(the)X
+2142(workloads)X
+720 4428(shown.)N
+990(Applications)X
+1420(such)X
+1588(as)X
+1676(the)X
+1794(loader,)X
+2035(compiler,)X
+2360(and)X
+720 4516(mail,)N
+921(which)X
+1156(currently)X
+1485(implement)X
+1866(their)X
+2051(own)X
+2227(hashing)X
+720 4604(routines,)N
+1032(should)X
+1279(be)X
+1389(modi\256ed)X
+1706(to)X
+1801(use)X
+1941(the)X
+2072(generic)X
+2342(rou-)X
+720 4692(tines.)N
+892 4806(This)N
+1087(hashing)X
+1389(package)X
+1705(is)X
+1810(one)X
+1978(access)X
+2236(method)X
+720 4894(which)N
+953(is)X
+1043(part)X
+1205(of)X
+1309(a)X
+1382(generic)X
+1656(database)X
+1970(access)X
+2212(package)X
+720 4982(being)N
+955(developed)X
+1342(at)X
+1457(the)X
+1612(University)X
+2007(of)X
+2131(California,)X
+720 5070(Berkeley.)N
+1089(It)X
+1177(will)X
+1340(include)X
+1614(a)X
+1688(btree)X
+1887(access)X
+2131(method)X
+2409(as)X
+720 5158(well)N
+916(as)X
+1041(\256xed)X
+1259(and)X
+1433(variable)X
+1750(length)X
+2007(record)X
+2270(access)X
+720 5246(methods)N
+1024(in)X
+1119(addition)X
+1414(to)X
+1509(the)X
+1640(hashed)X
+1896(support)X
+2168(presented)X
+720 5334(here.)N
+948(All)X
+1099(of)X
+1215(the)X
+1361(access)X
+1615(methods)X
+1934(are)X
+2081(based)X
+2312(on)X
+2440(a)X
+720 5422(key/data)N
+1037(pair)X
+1207(interface)X
+1533(and)X
+1693(appear)X
+1952(identical)X
+2272(to)X
+2378(the)X
+720 5510(application)N
+1121(layer,)X
+1347(allowing)X
+1671(application)X
+2071(implementa-)X
+720 5598(tions)N
+906(to)X
+999(be)X
+1106(largely)X
+1360(independent)X
+1783(of)X
+1881(the)X
+2010(database)X
+2318(type.)X
+720 5686(The)N
+873(package)X
+1165(is)X
+1246(expected)X
+1560(to)X
+1650(be)X
+1754(an)X
+1858(integral)X
+2131(part)X
+2284(of)X
+2378(the)X
+2706 538(4.4BSD)N
+3006(system,)X
+3293(with)X
+3479(various)X
+3759(standard)X
+4075(applications)X
+2706 626(such)N
+2879(as)X
+2972(more\(1\),)X
+3277(sort\(1\))X
+3517(and)X
+3659(vi\(1\))X
+3841(based)X
+4050(on)X
+4156(it.)X
+4266(While)X
+2706 714(the)N
+2833(current)X
+3089(design)X
+3326(does)X
+3501(not)X
+3631(support)X
+3899(multi-user)X
+4256(access)X
+2706 802(or)N
+2804(transactions,)X
+3238(they)X
+3407(could)X
+3616(be)X
+3723(incorporated)X
+4159(relatively)X
+2706 890(easily.)N
+10 f
+2894 938(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2 f
+3365 1030(hash)N
+3638(ndbm)X
+3936(%change)X
+1 f
+10 f
+2894 1034(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2934 1126(CREATE)N
+10 f
+2894 1130(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+3111 1222(user)N
+3390(0.2)X
+3677(0.4)X
+4079(50)X
+3143 1310(sys)N
+3390(0.1)X
+3677(1.0)X
+4079(90)X
+3 f
+2992 1398(elapsed)N
+10 f
+3296 1406(c)N
+1374(c)Y
+1294(c)Y
+1214(c)Y
+3 f
+3390 1398(0)N
+10 f
+3567 1406(c)N
+1374(c)Y
+1294(c)Y
+1214(c)Y
+3 f
+3677 1398(3.2)N
+10 f
+3869 1406(c)N
+1374(c)Y
+1294(c)Y
+1214(c)Y
+3 f
+4039 1398(100)N
+1 f
+10 f
+2894 1394(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2894 1410(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2934 1494(READ)N
+10 f
+2894 1498(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+3111 1590(user)N
+3390(0.1)X
+3677(0.1)X
+4119(0)X
+3143 1678(sys)N
+3390(0.1)X
+3677(0.4)X
+4079(75)X
+3 f
+2992 1766(elapsed)N
+10 f
+3296 1774(c)N
+1742(c)Y
+1662(c)Y
+1582(c)Y
+3 f
+3390 1766(0.0)N
+10 f
+3567 1774(c)N
+1742(c)Y
+1662(c)Y
+1582(c)Y
+3 f
+3677 1766(0.0)N
+10 f
+3869 1774(c)N
+1742(c)Y
+1662(c)Y
+1582(c)Y
+3 f
+4119 1766(0)N
+1 f
+10 f
+2894 1762(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2894 1778(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2934 1862(VERIFY)N
+10 f
+2894 1866(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+3111 1958(user)N
+3390(0.1)X
+3677(0.2)X
+4079(50)X
+3143 2046(sys)N
+3390(0.1)X
+3677(0.3)X
+4079(67)X
+3 f
+2992 2134(elapsed)N
+10 f
+3296 2142(c)N
+2110(c)Y
+2030(c)Y
+1950(c)Y
+3 f
+3390 2134(0.0)N
+10 f
+3567 2142(c)N
+2110(c)Y
+2030(c)Y
+1950(c)Y
+3 f
+3677 2134(0.0)N
+10 f
+3869 2142(c)N
+2110(c)Y
+2030(c)Y
+1950(c)Y
+3 f
+4119 2134(0)N
+1 f
+10 f
+2894 2130(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2894 2146(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2934 2230(SEQUENTIAL)N
+10 f
+2894 2234(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+3111 2326(user)N
+3390(0.1)X
+3677(0.0)X
+4012(-100)X
+3143 2414(sys)N
+3390(0.1)X
+3677(0.1)X
+4119(0)X
+3 f
+2992 2502(elapsed)N
+10 f
+3296 2510(c)N
+2478(c)Y
+2398(c)Y
+2318(c)Y
+3 f
+3390 2502(0.0)N
+10 f
+3567 2510(c)N
+2478(c)Y
+2398(c)Y
+2318(c)Y
+3 f
+3677 2502(0.0)N
+10 f
+3869 2510(c)N
+2478(c)Y
+2398(c)Y
+2318(c)Y
+3 f
+4119 2502(0)N
+1 f
+10 f
+2894 2498(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2894 2514(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2934 2598(SEQUENTIAL)N
+3453(\(with)X
+3642(data)X
+3796(retrieval\))X
+10 f
+2894 2602(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+3111 2694(user)N
+3390(0.1)X
+3677(0.1)X
+4119(0)X
+3143 2782(sys)N
+3390(0.1)X
+3677(0.1)X
+4119(0)X
+3 f
+2992 2870(elapsed)N
+3390(0.0)X
+3677(0.0)X
+4119(0)X
+1 f
+10 f
+2894 2874(i)N
+2913(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2885 2878(c)N
+2862(c)Y
+2782(c)Y
+2702(c)Y
+2622(c)Y
+2542(c)Y
+2462(c)Y
+2382(c)Y
+2302(c)Y
+2222(c)Y
+2142(c)Y
+2062(c)Y
+1982(c)Y
+1902(c)Y
+1822(c)Y
+1742(c)Y
+1662(c)Y
+1582(c)Y
+1502(c)Y
+1422(c)Y
+1342(c)Y
+1262(c)Y
+1182(c)Y
+1102(c)Y
+1022(c)Y
+3296 2878(c)N
+2846(c)Y
+2766(c)Y
+2686(c)Y
+3567 2878(c)N
+2846(c)Y
+2766(c)Y
+2686(c)Y
+3869 2878(c)N
+2846(c)Y
+2766(c)Y
+2686(c)Y
+4264 2878(c)N
+2862(c)Y
+2782(c)Y
+2702(c)Y
+2622(c)Y
+2542(c)Y
+2462(c)Y
+2382(c)Y
+2302(c)Y
+2222(c)Y
+2142(c)Y
+2062(c)Y
+1982(c)Y
+1902(c)Y
+1822(c)Y
+1742(c)Y
+1662(c)Y
+1582(c)Y
+1502(c)Y
+1422(c)Y
+1342(c)Y
+1262(c)Y
+1182(c)Y
+1102(c)Y
+1022(c)Y
+2891 3058(i)N
+2916(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2 f
+3304 3150(hash)N
+3571(hsearch)X
+3939(%change)X
+1 f
+10 f
+2891 3154(i)N
+2916(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2931 3246(CREATE/READ)N
+10 f
+2891 3250(i)N
+2916(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+3050 3342(user)N
+3329(0.3)X
+3648(0.4)X
+4048(25)X
+3082 3430(sys)N
+3329(0.0)X
+3648(0.0)X
+4088(0)X
+3 f
+2931 3518(elapsed)N
+3329(0.0)X
+3648(0.0)X
+4088(0)X
+1 f
+10 f
+2891 3522(i)N
+2916(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2882 3534(c)N
+3462(c)Y
+3382(c)Y
+3302(c)Y
+3222(c)Y
+3142(c)Y
+3235 3518(c)N
+3494(c)Y
+3414(c)Y
+3334(c)Y
+3506 3518(c)N
+3494(c)Y
+3414(c)Y
+3334(c)Y
+3872 3518(c)N
+3494(c)Y
+3414(c)Y
+3334(c)Y
+4267 3534(c)N
+3462(c)Y
+3382(c)Y
+3302(c)Y
+3222(c)Y
+3142(c)Y
+3 f
+2706 3658(Figure)N
+2953(8b:)X
+1 f
+3084(Timing)X
+3339(results)X
+3568(for)X
+3682(the)X
+3800(password)X
+4123(database.)X
+10 f
+2706 3746 -0.0930(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)AN
+3 f
+3396 3988(References)N
+1 f
+2706 4120([ATT79])N
+3058(AT&T,)X
+3358(DBM\(3X\),)X
+2 f
+3773(Unix)X
+3990(Programmer's)X
+2878 4208(Manual,)N
+3194(Seventh)X
+3491(Edition,)X
+3793(Volume)X
+4085(1)X
+1 f
+(,)S
+4192(January,)X
+2878 4296(1979.)N
+2706 4472([ATT85])N
+3027(AT&T,)X
+3296(HSEARCH\(BA_LIB\),)X
+2 f
+4053(Unix)X
+4239(System)X
+2878 4560(User's)N
+3112(Manual,)X
+3401(System)X
+3644(V.3)X
+1 f
+3753(,)X
+3793(pp.)X
+3913(506-508,)X
+4220(1985.)X
+2706 4736([BRE73])N
+3025(Brent,)X
+3253(Richard)X
+3537(P.,)X
+3651(``Reducing)X
+4041(the)X
+4168(Retrieval)X
+2878 4824(Time)N
+3071(of)X
+3162(Scatter)X
+3409(Storage)X
+3678(Techniques'',)X
+2 f
+4146(Commun-)X
+2878 4912(ications)N
+3175(of)X
+3281(the)X
+3422(ACM)X
+1 f
+3591(,)X
+3654(Volume)X
+3955(16,)X
+4098(No.)X
+4259(2,)X
+4362(pp.)X
+2878 5000(105-109,)N
+3185(February,)X
+3515(1973.)X
+2706 5176([BSD86])N
+3055(NDBM\(3\),)X
+2 f
+3469(4.3BSD)X
+3775(Unix)X
+3990(Programmer's)X
+2878 5264(Manual)N
+3155(Reference)X
+3505(Guide)X
+1 f
+3701(,)X
+3749(University)X
+4114(of)X
+4208(Califor-)X
+2878 5352(nia,)N
+3016(Berkeley,)X
+3346(1986.)X
+2706 5528([ENB88])N
+3025(Enbody,)X
+3319(R.)X
+3417(J.,)X
+3533(Du,)X
+3676(H.)X
+3779(C.,)X
+3897(``Dynamic)X
+4270(Hash-)X
+2878 5616(ing)N
+3034(Schemes'',)X
+2 f
+3427(ACM)X
+3630(Computing)X
+4019(Surveys)X
+1 f
+4269(,)X
+4322(Vol.)X
+2878 5704(20,)N
+2998(No.)X
+3136(2,)X
+3216(pp.)X
+3336(85-113,)X
+3603(June)X
+3770(1988.)X
+3 f
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+4384(11)X
+
+12 p
+%%Page: 12 12
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+432 258(A)N
+510(New)X
+682(Hashing)X
+985(Package)X
+1290(for)X
+1413(UNIX)X
+3663(Seltzer)X
+3920(&)X
+4007(Yigit)X
+1 f
+432 538([FAG79])N
+776(Ronald)X
+1057(Fagin,)X
+1308(Jurg)X
+1495(Nievergelt,)X
+1903(Nicholas)X
+604 626(Pippenger,)N
+1003(H.)X
+1135(Raymond)X
+1500(Strong,)X
+1787(``Extendible)X
+604 714(Hashing)N
+901(--)X
+985(A)X
+1073(Fast)X
+1236(Access)X
+1493(Method)X
+1771(for)X
+1894(Dynamic)X
+604 802(Files'',)N
+2 f
+855(ACM)X
+1046(Transactions)X
+1485(on)X
+1586(Database)X
+1914(Systems)X
+1 f
+2168(,)X
+604 890(Volume)N
+882(4,)X
+962(No.)X
+1100(3.,)X
+1200(September)X
+1563(1979,)X
+1763(pp)X
+1863(315-34)X
+432 1066([KNU68],)N
+802(Knuth,)X
+1064(D.E.,)X
+2 f
+1273(The)X
+1434(Art)X
+1577(of)X
+1680(Computer)X
+2041(Pro-)X
+604 1154(gramming)N
+971(Vol.)X
+1140(3:)X
+1245(Sorting)X
+1518(and)X
+1676(Searching)X
+1 f
+2001(,)X
+2058(sec-)X
+604 1242(tions)N
+779(6.3-6.4,)X
+1046(pp)X
+1146(481-550.)X
+432 1418([LAR78])N
+747(Larson,)X
+1011(Per-Ake,)X
+1319(``Dynamic)X
+1687(Hashing'',)X
+2 f
+2048(BIT)X
+1 f
+(,)S
+604 1506(Vol.)N
+764(18,)X
+884(1978,)X
+1084(pp.)X
+1204(184-201.)X
+432 1682([LAR88])N
+752(Larson,)X
+1021(Per-Ake,)X
+1335(``Dynamic)X
+1709(Hash)X
+1900(Tables'',)X
+2 f
+604 1770(Communications)N
+1183(of)X
+1281(the)X
+1415(ACM)X
+1 f
+1584(,)X
+1640(Volume)X
+1934(31,)X
+2070(No.)X
+604 1858(4.,)N
+704(April)X
+893(1988,)X
+1093(pp)X
+1193(446-457.)X
+432 2034([LIT80])N
+731(Witold,)X
+1013(Litwin,)X
+1286(``Linear)X
+1590(Hashing:)X
+1939(A)X
+2036(New)X
+604 2122(Tool)N
+786(for)X
+911(File)X
+1065(and)X
+1211(Table)X
+1424(Addressing'',)X
+2 f
+1893(Proceed-)X
+604 2210(ings)N
+761(of)X
+847(the)X
+969(6th)X
+1095(International)X
+1540(Conference)X
+1933(on)X
+2036(Very)X
+604 2298(Large)N
+815(Databases)X
+1 f
+1153(,)X
+1193(1980.)X
+432 2474([NEL90])N
+743(Nelson,)X
+1011(Philip)X
+1222(A.,)X
+2 f
+1341(Gdbm)X
+1558(1.4)X
+1679(source)X
+1913(distribu-)X
+604 2562(tion)N
+748(and)X
+888(README)X
+1 f
+1209(,)X
+1249(August)X
+1500(1990.)X
+432 2738([THOM90])N
+840(Ken)X
+1011(Thompson,)X
+1410(private)X
+1670(communication,)X
+604 2826(Nov.)N
+782(1990.)X
+432 3002([TOR87])N
+790(Torek,)X
+1066(C.,)X
+1222(``Re:)X
+1470(dbm.a)X
+1751(and)X
+1950(ndbm.a)X
+604 3090(archives'',)N
+2 f
+966(USENET)X
+1279(newsgroup)X
+1650(comp.unix)X
+1 f
+2002(1987.)X
+432 3266([TOR88])N
+760(Torek,)X
+1006(C.,)X
+1133(``Re:)X
+1351(questions)X
+1686(regarding)X
+2027(data-)X
+604 3354(bases)N
+826(created)X
+1106(with)X
+1295(dbm)X
+1484(and)X
+1647(ndbm)X
+1876(routines'')X
+2 f
+604 3442(USENET)N
+937(newsgroup)X
+1328(comp.unix.questions)X
+1 f
+1982(,)X
+2041(June)X
+604 3530(1988.)N
+432 3706([WAL84])N
+773(Wales,)X
+1018(R.,)X
+1135(``Discussion)X
+1564(of)X
+1655("dbm")X
+1887(data)X
+2045(base)X
+604 3794(system'',)N
+2 f
+973(USENET)X
+1339(newsgroup)X
+1762(unix.wizards)X
+1 f
+2168(,)X
+604 3882(January,)N
+894(1984.)X
+432 4058([YIG89])N
+751(Ozan)X
+963(S.)X
+1069(Yigit,)X
+1294(``How)X
+1545(to)X
+1648(Roll)X
+1826(Your)X
+2032(Own)X
+604 4146(Dbm/Ndbm'',)N
+2 f
+1087(unpublished)X
+1504(manuscript)X
+1 f
+(,)S
+1910(Toronto,)X
+604 4234(July,)N
+777(1989)X
+3 f
+432 5960(12)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+13 p
+%%Page: 13 13
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+720 258(Seltzer)N
+977(&)X
+1064(Yigit)X
+3278(A)X
+3356(New)X
+3528(Hashing)X
+3831(Package)X
+4136(for)X
+4259(UNIX)X
+1 f
+720 538(Margo)N
+960(I.)X
+1033(Seltzer)X
+1282(is)X
+1361(a)X
+1423(Ph.D.)X
+1631(student)X
+1887(in)X
+1974(the)X
+2097(Department)X
+720 626(of)N
+823(Electrical)X
+1167(Engineering)X
+1595(and)X
+1747(Computer)X
+2102(Sciences)X
+2418(at)X
+720 714(the)N
+850(University)X
+1220(of)X
+1318(California,)X
+1694(Berkeley.)X
+2055(Her)X
+2207(research)X
+720 802(interests)N
+1017(include)X
+1283(\256le)X
+1415(systems,)X
+1718(databases,)X
+2076(and)X
+2221(transac-)X
+720 890(tion)N
+896(processing)X
+1291(systems.)X
+1636(She)X
+1807(spent)X
+2027(several)X
+2306(years)X
+720 978(working)N
+1026(at)X
+1123(startup)X
+1380(companies)X
+1762(designing)X
+2112(and)X
+2267(imple-)X
+720 1066(menting)N
+1048(\256le)X
+1216(systems)X
+1535(and)X
+1716(transaction)X
+2133(processing)X
+720 1154(software)N
+1026(and)X
+1170(designing)X
+1509(microprocessors.)X
+2103(Ms.)X
+2253(Seltzer)X
+720 1242(received)N
+1057(her)X
+1223(AB)X
+1397(in)X
+1522(Applied)X
+1843(Mathematics)X
+2320(from)X
+720 1330 0.1953(Harvard/Radcliffe)AN
+1325(College)X
+1594(in)X
+1676(1983.)X
+720 1444(In)N
+810(her)X
+936(spare)X
+1129(time,)X
+1313(Margo)X
+1549(can)X
+1683(usually)X
+1936(be)X
+2034(found)X
+2243(prepar-)X
+720 1532(ing)N
+868(massive)X
+1171(quantities)X
+1527(of)X
+1639(food)X
+1831(for)X
+1970(hungry)X
+2242(hoards,)X
+720 1620(studying)N
+1022(Japanese,)X
+1355(or)X
+1449(playing)X
+1716(soccer)X
+1948(with)X
+2116(an)X
+2218(exciting)X
+720 1708(Bay)N
+912(Area)X
+1132(Women's)X
+1507(Soccer)X
+1788(team,)X
+2026(the)X
+2186(Berkeley)X
+720 1796(Bruisers.)N
+720 1910(Ozan)N
+915(\()X
+3 f
+942(Oz)X
+1 f
+1040(\))X
+1092(Yigit)X
+1281(is)X
+1358(currently)X
+1672(a)X
+1732(software)X
+2033(engineer)X
+2334(with)X
+720 1998(the)N
+886(Communications)X
+1499(Research)X
+1861(and)X
+2044(Development)X
+720 2086(group,)N
+948(Computing)X
+1328(Services,)X
+1641(York)X
+1826(University.)X
+2224(His)X
+2355(for-)X
+720 2174(mative)N
+967(years)X
+1166(were)X
+1352(also)X
+1510(spent)X
+1708(at)X
+1795(York,)X
+2009(where)X
+2234(he)X
+2338(held)X
+720 2262(system)N
+985(programmer)X
+1425(and)X
+1583(administrator)X
+2052(positions)X
+2382(for)X
+720 2350(various)N
+995(mixtures)X
+1314(of)X
+1420(of)X
+1526(UNIX)X
+1765(systems)X
+2056(starting)X
+2334(with)X
+720 2438(Berkeley)N
+1031(4.1)X
+1151(in)X
+1233(1982,)X
+1433(while)X
+1631(at)X
+1709(the)X
+1827(same)X
+2012(time)X
+2174(obtaining)X
+720 2526(a)N
+776(degree)X
+1011(in)X
+1093(Computer)X
+1433(Science.)X
+720 2640(In)N
+813(his)X
+931(copious)X
+1205(free)X
+1356(time,)X
+1543(Oz)X
+1662(enjoys)X
+1896(working)X
+2188(on)X
+2293(what-)X
+720 2728(ever)N
+890(software)X
+1197(looks)X
+1400(interesting,)X
+1788(which)X
+2014(often)X
+2209(includes)X
+720 2816(language)N
+1044(interpreters,)X
+1464(preprocessors,)X
+1960(and)X
+2110(lately,)X
+2342(pro-)X
+720 2904(gram)N
+905(generators)X
+1260(and)X
+1396(expert)X
+1617(systems.)X
+720 3018(Oz)N
+836(has)X
+964(authored)X
+1266(several)X
+1515(public-domain)X
+2003(software)X
+2301(tools,)X
+720 3106(including)N
+1069(an)X
+1191(nroff-like)X
+1545(text)X
+1711(formatter)X
+2 f
+2056(proff)X
+1 f
+2257(that)X
+2423(is)X
+720 3194(apparently)N
+1083(still)X
+1226(used)X
+1397(in)X
+1483(some)X
+1676(basement)X
+2002(PCs.)X
+2173(His)X
+2307(latest)X
+720 3282(obsessions)N
+1143(include)X
+1460(the)X
+1639(incredible)X
+2040(programming)X
+720 3370(language)N
+1030(Scheme,)X
+1324(and)X
+1460(Chinese)X
+1738(Brush)X
+1949(painting.)X
+3 f
+720 5960(USENIX)N
+9 f
+1042(-)X
+3 f
+1106(Winter)X
+1371('91)X
+9 f
+1498(-)X
+3 f
+1562(Dallas,)X
+1815(TX)X
+4384(13)X
+
+14 p
+%%Page: 14 14
+0(Courier)xf 0 f
+10 s 10 xH 0 xS 0 f
+3 f
+432 5960(14)N
+2970(USENIX)X
+9 f
+3292(-)X
+3 f
+3356(Winter)X
+3621('91)X
+9 f
+3748(-)X
+3 f
+3812(Dallas,)X
+4065(TX)X
+
+14 p
+%%Trailer
+xt
+
+xs
diff --git a/src/plugins/kdb/db2/libdb2/docs/libtp.usenix.ps b/src/plugins/kdb/db2/libdb2/docs/libtp.usenix.ps
new file mode 100644
index 0000000000..5b5ba6e1b8
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/libtp.usenix.ps
@@ -0,0 +1,12340 @@
+%!PS-Adobe-1.0
+%%Creator: utopia:margo (& Seltzer,608-13E,8072,)
+%%Title: stdin (ditroff)
+%%CreationDate: Thu Dec 12 15:32:11 1991
+%%EndComments
+%	@(#)psdit.pro	1.3 4/15/88
+% lib/psdit.pro -- prolog for psdit (ditroff) files
+% Copyright (c) 1984, 1985 Adobe Systems Incorporated. All Rights Reserved.
+% last edit: shore Sat Nov 23 20:28:03 1985
+% RCSID: $Header$
+
+% Changed by Edward Wang (edward@ucbarpa.berkeley.edu) to handle graphics,
+% 17 Feb, 87.
+
+/$DITroff 140 dict def $DITroff begin
+/fontnum 1 def /fontsize 10 def /fontheight 10 def /fontslant 0 def
+/xi{0 72 11 mul translate 72 resolution div dup neg scale 0 0 moveto
+ /fontnum 1 def /fontsize 10 def /fontheight 10 def /fontslant 0 def F
+ /pagesave save def}def
+/PB{save /psv exch def currentpoint translate 
+ resolution 72 div dup neg scale 0 0 moveto}def
+/PE{psv restore}def
+/arctoobig 90 def /arctoosmall .05 def
+/m1 matrix def /m2 matrix def /m3 matrix def /oldmat matrix def
+/tan{dup sin exch cos div}def
+/point{resolution 72 div mul}def
+/dround	{transform round exch round exch itransform}def
+/xT{/devname exch def}def
+/xr{/mh exch def /my exch def /resolution exch def}def
+/xp{}def
+/xs{docsave restore end}def
+/xt{}def
+/xf{/fontname exch def /slotno exch def fontnames slotno get fontname eq not
+ {fonts slotno fontname findfont put fontnames slotno fontname put}if}def
+/xH{/fontheight exch def F}def
+/xS{/fontslant exch def F}def
+/s{/fontsize exch def /fontheight fontsize def F}def
+/f{/fontnum exch def F}def
+/F{fontheight 0 le{/fontheight fontsize def}if
+ fonts fontnum get fontsize point 0 0 fontheight point neg 0 0 m1 astore
+ fontslant 0 ne{1 0 fontslant tan 1 0 0 m2 astore m3 concatmatrix}if
+ makefont setfont .04 fontsize point mul 0 dround pop setlinewidth}def
+/X{exch currentpoint exch pop moveto show}def
+/N{3 1 roll moveto show}def
+/Y{exch currentpoint pop exch moveto show}def
+/S{show}def
+/ditpush{}def/ditpop{}def
+/AX{3 -1 roll currentpoint exch pop moveto 0 exch ashow}def
+/AN{4 2 roll moveto 0 exch ashow}def
+/AY{3 -1 roll currentpoint pop exch moveto 0 exch ashow}def
+/AS{0 exch ashow}def
+/MX{currentpoint exch pop moveto}def
+/MY{currentpoint pop exch moveto}def
+/MXY{moveto}def
+/cb{pop}def	% action on unknown char -- nothing for now
+/n{}def/w{}def
+/p{pop showpage pagesave restore /pagesave save def}def
+/Dt{/Dlinewidth exch def}def 1 Dt
+/Ds{/Ddash exch def}def -1 Ds
+/Di{/Dstipple exch def}def 1 Di
+/Dsetlinewidth{2 Dlinewidth mul setlinewidth}def
+/Dsetdash{Ddash 4 eq{[8 12]}{Ddash 16 eq{[32 36]}
+ {Ddash 20 eq{[32 12 8 12]}{[]}ifelse}ifelse}ifelse 0 setdash}def
+/Dstroke{gsave Dsetlinewidth Dsetdash 1 setlinecap stroke grestore
+ currentpoint newpath moveto}def
+/Dl{rlineto Dstroke}def
+/arcellipse{/diamv exch def /diamh exch def oldmat currentmatrix pop
+ currentpoint translate 1 diamv diamh div scale /rad diamh 2 div def
+ currentpoint exch rad add exch rad -180 180 arc oldmat setmatrix}def
+/Dc{dup arcellipse Dstroke}def
+/De{arcellipse Dstroke}def
+/Da{/endv exch def /endh exch def /centerv exch def /centerh exch def
+ /cradius centerv centerv mul centerh centerh mul add sqrt def
+ /eradius endv endv mul endh endh mul add sqrt def
+ /endang endv endh atan def
+ /startang centerv neg centerh neg atan def
+ /sweep startang endang sub dup 0 lt{360 add}if def
+ sweep arctoobig gt
+ {/midang startang sweep 2 div sub def /midrad cradius eradius add 2 div def
+  /midh midang cos midrad mul def /midv midang sin midrad mul def
+  midh neg midv neg endh endv centerh centerv midh midv Da
+  Da}
+ {sweep arctoosmall ge
+  {/controldelt 1 sweep 2 div cos sub 3 sweep 2 div sin mul div 4 mul def
+   centerv neg controldelt mul centerh controldelt mul
+   endv neg controldelt mul centerh add endh add
+   endh controldelt mul centerv add endv add
+   centerh endh add centerv endv add rcurveto Dstroke}
+  {centerh endh add centerv endv add rlineto Dstroke}
+  ifelse}
+ ifelse}def
+/Dpatterns[
+[%cf[widthbits]
+[8<0000000000000010>]
+[8<0411040040114000>]
+[8<0204081020408001>]
+[8<0000103810000000>]
+[8<6699996666999966>]
+[8<0000800100001008>]
+[8<81c36666c3810000>]
+[8<0f0e0c0800000000>]
+[8<0000000000000010>]
+[8<0411040040114000>]
+[8<0204081020408001>]
+[8<0000001038100000>]
+[8<6699996666999966>]
+[8<0000800100001008>]
+[8<81c36666c3810000>]
+[8<0f0e0c0800000000>]
+[8<0042660000246600>]
+[8<0000990000990000>]
+[8<0804020180402010>]
+[8<2418814242811824>]
+[8<6699996666999966>]
+[8<8000000008000000>]
+[8<00001c3e363e1c00>]
+[8<0000000000000000>]
+[32<00000040000000c00000004000000040000000e0000000000000000000000000>]
+[32<00000000000060000000900000002000000040000000f0000000000000000000>]
+[32<000000000000000000e0000000100000006000000010000000e0000000000000>]
+[32<00000000000000002000000060000000a0000000f00000002000000000000000>]
+[32<0000000e0000000000000000000000000000000f000000080000000e00000001>]
+[32<0000090000000600000000000000000000000000000007000000080000000e00>]
+[32<00010000000200000004000000040000000000000000000000000000000f0000>]
+[32<0900000006000000090000000600000000000000000000000000000006000000>]]
+[%ug
+[8<0000020000000000>]
+[8<0000020000002000>]
+[8<0004020000002000>]
+[8<0004020000402000>]
+[8<0004060000402000>]
+[8<0004060000406000>]
+[8<0006060000406000>]
+[8<0006060000606000>]
+[8<00060e0000606000>]
+[8<00060e000060e000>]
+[8<00070e000060e000>]
+[8<00070e000070e000>]
+[8<00070e020070e000>]
+[8<00070e020070e020>]
+[8<04070e020070e020>]
+[8<04070e024070e020>]
+[8<04070e064070e020>]
+[8<04070e064070e060>]
+[8<06070e064070e060>]
+[8<06070e066070e060>]
+[8<06070f066070e060>]
+[8<06070f066070f060>]
+[8<060f0f066070f060>]
+[8<060f0f0660f0f060>]
+[8<060f0f0760f0f060>]
+[8<060f0f0760f0f070>]
+[8<0e0f0f0760f0f070>]
+[8<0e0f0f07e0f0f070>]
+[8<0e0f0f0fe0f0f070>]
+[8<0e0f0f0fe0f0f0f0>]
+[8<0f0f0f0fe0f0f0f0>]
+[8<0f0f0f0ff0f0f0f0>]
+[8<1f0f0f0ff0f0f0f0>]
+[8<1f0f0f0ff1f0f0f0>]
+[8<1f0f0f8ff1f0f0f0>]
+[8<1f0f0f8ff1f0f0f8>]
+[8<9f0f0f8ff1f0f0f8>]
+[8<9f0f0f8ff9f0f0f8>]
+[8<9f0f0f9ff9f0f0f8>]
+[8<9f0f0f9ff9f0f0f9>]
+[8<9f8f0f9ff9f0f0f9>]
+[8<9f8f0f9ff9f8f0f9>]
+[8<9f8f1f9ff9f8f0f9>]
+[8<9f8f1f9ff9f8f1f9>]
+[8<bf8f1f9ff9f8f1f9>]
+[8<bf8f1f9ffbf8f1f9>]
+[8<bf8f1fdffbf8f1f9>]
+[8<bf8f1fdffbf8f1fd>]
+[8<ff8f1fdffbf8f1fd>]
+[8<ff8f1fdffff8f1fd>]
+[8<ff8f1ffffff8f1fd>]
+[8<ff8f1ffffff8f1ff>]
+[8<ff9f1ffffff8f1ff>]
+[8<ff9f1ffffff9f1ff>]
+[8<ff9f9ffffff9f1ff>]
+[8<ff9f9ffffff9f9ff>]
+[8<ffbf9ffffff9f9ff>]
+[8<ffbf9ffffffbf9ff>]
+[8<ffbfdffffffbf9ff>]
+[8<ffbfdffffffbfdff>]
+[8<ffffdffffffbfdff>]
+[8<ffffdffffffffdff>]
+[8<fffffffffffffdff>]
+[8<ffffffffffffffff>]]
+[%mg
+[8<8000000000000000>]
+[8<0822080080228000>]
+[8<0204081020408001>]
+[8<40e0400000000000>]
+[8<66999966>]
+[8<8001000010080000>]
+[8<81c36666c3810000>]
+[8<f0e0c08000000000>]
+[16<07c00f801f003e007c00f800f001e003c007800f001f003e007c00f801f003e0>]
+[16<1f000f8007c003e001f000f8007c003e001f800fc007e003f001f8007c003e00>]
+[8<c3c300000000c3c3>]
+[16<0040008001000200040008001000200040008000000100020004000800100020>]
+[16<0040002000100008000400020001800040002000100008000400020001000080>]
+[16<1fc03fe07df0f8f8f07de03fc01f800fc01fe03ff07df8f87df03fe01fc00f80>]
+[8<80>]
+[8<8040201000000000>]
+[8<84cc000048cc0000>]
+[8<9900009900000000>]
+[8<08040201804020100800020180002010>]
+[8<2418814242811824>]
+[8<66999966>]
+[8<8000000008000000>]
+[8<70f8d8f870000000>]
+[8<0814224180402010>]
+[8<aa00440a11a04400>]
+[8<018245aa45820100>]
+[8<221c224180808041>]
+[8<88000000>]
+[8<0855800080550800>]
+[8<2844004482440044>]
+[8<0810204080412214>]
+[8<00>]]]def
+/Dfill{
+ transform /maxy exch def /maxx exch def
+ transform /miny exch def /minx exch def
+ minx maxx gt{/minx maxx /maxx minx def def}if
+ miny maxy gt{/miny maxy /maxy miny def def}if
+ Dpatterns Dstipple 1 sub get exch 1 sub get
+ aload pop /stip exch def /stipw exch def /stiph 128 def
+ /imatrix[stipw 0 0 stiph 0 0]def
+ /tmatrix[stipw 0 0 stiph 0 0]def
+ /minx minx cvi stiph idiv stiph mul def
+ /miny miny cvi stipw idiv stipw mul def
+ gsave eoclip 0 setgray
+ miny stiph maxy{
+  tmatrix exch 5 exch put
+  minx stipw maxx{
+   tmatrix exch 4 exch put tmatrix setmatrix
+   stipw stiph true imatrix {stip} imagemask
+  }for
+ }for
+ grestore
+}def
+/Dp{Dfill Dstroke}def
+/DP{Dfill currentpoint newpath moveto}def
+end
+
+/ditstart{$DITroff begin
+ /nfonts 60 def			% NFONTS makedev/ditroff dependent!
+ /fonts[nfonts{0}repeat]def
+ /fontnames[nfonts{()}repeat]def
+/docsave save def
+}def
+
+% character outcalls
+/oc{
+ /pswid exch def /cc exch def /name exch def
+ /ditwid pswid fontsize mul resolution mul 72000 div def
+ /ditsiz fontsize resolution mul 72 div def
+ ocprocs name known{ocprocs name get exec}{name cb}ifelse
+}def
+/fractm [.65 0 0 .6 0 0] def
+/fraction{
+ /fden exch def /fnum exch def gsave /cf currentfont def
+ cf fractm makefont setfont 0 .3 dm 2 copy neg rmoveto
+ fnum show rmoveto currentfont cf setfont(\244)show setfont fden show 
+ grestore ditwid 0 rmoveto
+}def
+/oce{grestore ditwid 0 rmoveto}def
+/dm{ditsiz mul}def
+/ocprocs 50 dict def ocprocs begin
+(14){(1)(4)fraction}def
+(12){(1)(2)fraction}def
+(34){(3)(4)fraction}def
+(13){(1)(3)fraction}def
+(23){(2)(3)fraction}def
+(18){(1)(8)fraction}def
+(38){(3)(8)fraction}def
+(58){(5)(8)fraction}def
+(78){(7)(8)fraction}def
+(sr){gsave 0 .06 dm rmoveto(\326)show oce}def
+(is){gsave 0 .15 dm rmoveto(\362)show oce}def
+(->){gsave 0 .02 dm rmoveto(\256)show oce}def
+(<-){gsave 0 .02 dm rmoveto(\254)show oce}def
+(==){gsave 0 .05 dm rmoveto(\272)show oce}def
+(uc){gsave currentpoint 400 .009 dm mul add translate
+     8 -8 scale ucseal oce}def
+end
+
+% an attempt at a PostScript FONT to implement ditroff special chars
+% this will enable us to 
+%	cache the little buggers
+%	generate faster, more compact PS out of psdit
+%	confuse everyone (including myself)!
+50 dict dup begin
+/FontType 3 def
+/FontName /DIThacks def
+/FontMatrix [.001 0 0 .001 0 0] def
+/FontBBox [-260 -260 900 900] def% a lie but ...
+/Encoding 256 array def
+0 1 255{Encoding exch /.notdef put}for
+Encoding
+ dup 8#040/space put %space
+ dup 8#110/rc put %right ceil
+ dup 8#111/lt put %left  top curl
+ dup 8#112/bv put %bold vert
+ dup 8#113/lk put %left  mid curl
+ dup 8#114/lb put %left  bot curl
+ dup 8#115/rt put %right top curl
+ dup 8#116/rk put %right mid curl
+ dup 8#117/rb put %right bot curl
+ dup 8#120/rf put %right floor
+ dup 8#121/lf put %left  floor
+ dup 8#122/lc put %left  ceil
+ dup 8#140/sq put %square
+ dup 8#141/bx put %box
+ dup 8#142/ci put %circle
+ dup 8#143/br put %box rule
+ dup 8#144/rn put %root extender
+ dup 8#145/vr put %vertical rule
+ dup 8#146/ob put %outline bullet
+ dup 8#147/bu put %bullet
+ dup 8#150/ru put %rule
+ dup 8#151/ul put %underline
+ pop
+/DITfd 100 dict def
+/BuildChar{0 begin
+ /cc exch def /fd exch def
+ /charname fd /Encoding get cc get def
+ /charwid fd /Metrics get charname get def
+ /charproc fd /CharProcs get charname get def
+ charwid 0 fd /FontBBox get aload pop setcachedevice
+ 2 setlinejoin 40 setlinewidth
+ newpath 0 0 moveto gsave charproc grestore
+ end}def
+/BuildChar load 0 DITfd put
+/CharProcs 50 dict def
+CharProcs begin
+/space{}def
+/.notdef{}def
+/ru{500 0 rls}def
+/rn{0 840 moveto 500 0 rls}def
+/vr{0 800 moveto 0 -770 rls}def
+/bv{0 800 moveto 0 -1000 rls}def
+/br{0 840 moveto 0 -1000 rls}def
+/ul{0 -140 moveto 500 0 rls}def
+/ob{200 250 rmoveto currentpoint newpath 200 0 360 arc closepath stroke}def
+/bu{200 250 rmoveto currentpoint newpath 200 0 360 arc closepath fill}def
+/sq{80 0 rmoveto currentpoint dround newpath moveto
+    640 0 rlineto 0 640 rlineto -640 0 rlineto closepath stroke}def
+/bx{80 0 rmoveto currentpoint dround newpath moveto
+    640 0 rlineto 0 640 rlineto -640 0 rlineto closepath fill}def
+/ci{500 360 rmoveto currentpoint newpath 333 0 360 arc
+    50 setlinewidth stroke}def
+
+/lt{0 -200 moveto 0 550 rlineto currx 800 2cx s4 add exch s4 a4p stroke}def
+/lb{0 800 moveto 0 -550 rlineto currx -200 2cx s4 add exch s4 a4p stroke}def
+/rt{0 -200 moveto 0 550 rlineto currx 800 2cx s4 sub exch s4 a4p stroke}def
+/rb{0 800 moveto 0 -500 rlineto currx -200 2cx s4 sub exch s4 a4p stroke}def
+/lk{0 800 moveto 0 300 -300 300 s4 arcto pop pop 1000 sub
+    0 300 4 2 roll s4 a4p 0 -200 lineto stroke}def
+/rk{0 800 moveto 0 300 s2 300 s4 arcto pop pop 1000 sub
+    0 300 4 2 roll s4 a4p 0 -200 lineto stroke}def
+/lf{0 800 moveto 0 -1000 rlineto s4 0 rls}def
+/rf{0 800 moveto 0 -1000 rlineto s4 neg 0 rls}def
+/lc{0 -200 moveto 0 1000 rlineto s4 0 rls}def
+/rc{0 -200 moveto 0 1000 rlineto s4 neg 0 rls}def
+end
+
+/Metrics 50 dict def Metrics begin
+/.notdef 0 def
+/space 500 def
+/ru 500 def
+/br 0 def
+/lt 416 def
+/lb 416 def
+/rt 416 def
+/rb 416 def
+/lk 416 def
+/rk 416 def
+/rc 416 def
+/lc 416 def
+/rf 416 def
+/lf 416 def
+/bv 416 def
+/ob 350 def
+/bu 350 def
+/ci 750 def
+/bx 750 def
+/sq 750 def
+/rn 500 def
+/ul 500 def
+/vr 0 def
+end
+
+DITfd begin
+/s2 500 def /s4 250 def /s3 333 def
+/a4p{arcto pop pop pop pop}def
+/2cx{2 copy exch}def
+/rls{rlineto stroke}def
+/currx{currentpoint pop}def
+/dround{transform round exch round exch itransform} def
+end
+end
+/DIThacks exch definefont pop
+ditstart
+(psc)xT
+576 1 1 xr
+1(Times-Roman)xf 1 f
+2(Times-Italic)xf 2 f
+3(Times-Bold)xf 3 f
+4(Times-BoldItalic)xf 4 f
+5(Helvetica)xf 5 f
+6(Helvetica-Bold)xf 6 f
+7(Courier)xf 7 f
+8(Courier-Bold)xf 8 f
+9(Symbol)xf 9 f
+10(DIThacks)xf 10 f
+10 s
+1 f
+xi
+%%EndProlog
+
+%%Page: 1 1
+10 s 10 xH 0 xS 1 f
+3 f
+14 s
+1205 1206(LIBTP:)N
+1633(Portable,)X
+2100(M)X
+2206(odular)X
+2551(Transactions)X
+3202(for)X
+3374(UNIX)X
+1 f
+11 s
+3661 1162(1)N
+2 f
+12 s
+2182 1398(Margo)N
+2467(Seltzer)X
+2171 1494(Michael)N
+2511(Olson)X
+1800 1590(University)N
+2225(of)X
+2324(California,)X
+2773(Berkeley)X
+3 f
+2277 1878(Abstract)N
+1 f
+10 s
+755 2001(Transactions)N
+1198(provide)X
+1475(a)X
+1543(useful)X
+1771(programming)X
+2239(paradigm)X
+2574(for)X
+2700(maintaining)X
+3114(logical)X
+3364(consistency,)X
+3790(arbitrating)X
+4156(con-)X
+555 2091(current)N
+808(access,)X
+1059(and)X
+1200(managing)X
+1540(recovery.)X
+1886(In)X
+1977(traditional)X
+2330(UNIX)X
+2555(systems,)X
+2852(the)X
+2974(only)X
+3140(easy)X
+3307(way)X
+3465(of)X
+3556(using)X
+3753(transactions)X
+4160(is)X
+4237(to)X
+555 2181(purchase)N
+876(a)X
+947(database)X
+1258(system.)X
+1554(Such)X
+1748(systems)X
+2035(are)X
+2168(often)X
+2367(slow,)X
+2572(costly,)X
+2817(and)X
+2967(may)X
+3139(not)X
+3275(provide)X
+3554(the)X
+3686(exact)X
+3890(functionality)X
+555 2271(desired.)N
+848(This)X
+1011(paper)X
+1210(presents)X
+1493(the)X
+1611(design,)X
+1860(implementation,)X
+2402(and)X
+2538(performance)X
+2965(of)X
+3052(LIBTP,)X
+3314(a)X
+3370(simple,)X
+3623(non-proprietary)X
+4147(tran-)X
+555 2361(saction)N
+809(library)X
+1050(using)X
+1249(the)X
+1373(4.4BSD)X
+1654(database)X
+1957(access)X
+2189(routines)X
+2473(\()X
+3 f
+2500(db)X
+1 f
+2588(\(3\)\).)X
+2775(On)X
+2899(a)X
+2961(conventional)X
+3401(transaction)X
+3779(processing)X
+4148(style)X
+555 2451(benchmark,)N
+959(its)X
+1061(performance)X
+1495(is)X
+1575(approximately)X
+2065(85%)X
+2239(that)X
+2386(of)X
+2480(the)X
+2604(database)X
+2907(access)X
+3139(routines)X
+3423(without)X
+3693(transaction)X
+4071(protec-)X
+555 2541(tion,)N
+725(200%)X
+938(that)X
+1084(of)X
+1177(using)X
+3 f
+1376(fsync)X
+1 f
+1554(\(2\))X
+1674(to)X
+1761(commit)X
+2030(modi\256cations)X
+2490(to)X
+2577(disk,)X
+2755(and)X
+2896(125%)X
+3108(that)X
+3253(of)X
+3345(a)X
+3406(commercial)X
+3810(relational)X
+4138(data-)X
+555 2631(base)N
+718(system.)X
+3 f
+555 2817(1.)N
+655(Introduction)X
+1 f
+755 2940(Transactions)N
+1186(are)X
+1306(used)X
+1474(in)X
+1557(database)X
+1855(systems)X
+2129(to)X
+2212(enable)X
+2443(concurrent)X
+2807(users)X
+2992(to)X
+3074(apply)X
+3272(multi-operation)X
+3790(updates)X
+4055(without)X
+555 3030(violating)N
+863(the)X
+985(integrity)X
+1280(of)X
+1371(the)X
+1493(database.)X
+1814(They)X
+2003(provide)X
+2271(the)X
+2392(properties)X
+2736(of)X
+2826(atomicity,)X
+3171(consistency,)X
+3588(isolation,)X
+3906(and)X
+4045(durabil-)X
+555 3120(ity.)N
+701(By)X
+816(atomicity,)X
+1160(we)X
+1276(mean)X
+1472(that)X
+1614(the)X
+1734(set)X
+1845(of)X
+1934(updates)X
+2200(comprising)X
+2581(a)X
+2638(transaction)X
+3011(must)X
+3187(be)X
+3284(applied)X
+3541(as)X
+3629(a)X
+3686(single)X
+3898(unit;)X
+4085(that)X
+4226(is,)X
+555 3210(they)N
+714(must)X
+890(either)X
+1094(all)X
+1195(be)X
+1292(applied)X
+1549(to)X
+1632(the)X
+1751(database)X
+2049(or)X
+2137(all)X
+2238(be)X
+2335(absent.)X
+2601(Consistency)X
+3013(requires)X
+3293(that)X
+3434(a)X
+3491(transaction)X
+3864(take)X
+4019(the)X
+4138(data-)X
+555 3300(base)N
+725(from)X
+908(one)X
+1051(logically)X
+1358(consistent)X
+1704(state)X
+1877(to)X
+1965(another.)X
+2272(The)X
+2423(property)X
+2721(of)X
+2814(isolation)X
+3115(requires)X
+3400(that)X
+3546(concurrent)X
+3916(transactions)X
+555 3390(yield)N
+750(results)X
+994(which)X
+1225(are)X
+1358(indistinguishable)X
+1938(from)X
+2128(the)X
+2260(results)X
+2503(which)X
+2733(would)X
+2967(be)X
+3077(obtained)X
+3387(by)X
+3501(running)X
+3784(the)X
+3916(transactions)X
+555 3480(sequentially.)N
+1002(Finally,)X
+1268(durability)X
+1599(requires)X
+1878(that)X
+2018(once)X
+2190(transactions)X
+2593(have)X
+2765(been)X
+2937(committed,)X
+3319(their)X
+3486(results)X
+3715(must)X
+3890(be)X
+3986(preserved)X
+555 3570(across)N
+776(system)X
+1018(failures)X
+1279([TPCB90].)X
+755 3693(Although)N
+1080(these)X
+1268(properties)X
+1612(are)X
+1734(most)X
+1912(frequently)X
+2265(discussed)X
+2595(in)X
+2680(the)X
+2801(context)X
+3060(of)X
+3150(databases,)X
+3501(they)X
+3661(are)X
+3782(useful)X
+4000(program-)X
+555 3783(ming)N
+750(paradigms)X
+1114(for)X
+1238(more)X
+1433(general)X
+1700(purpose)X
+1984(applications.)X
+2441(There)X
+2659(are)X
+2788(several)X
+3046(different)X
+3353(situations)X
+3689(where)X
+3916(transactions)X
+555 3873(can)N
+687(be)X
+783(used)X
+950(to)X
+1032(replace)X
+1285(current)X
+1533(ad-hoc)X
+1772(mechanisms.)X
+755 3996(One)N
+910(situation)X
+1206(is)X
+1280(when)X
+1475(multiple)X
+1762(\256les)X
+1916(or)X
+2004(parts)X
+2181(of)X
+2269(\256les)X
+2422(need)X
+2594(to)X
+2676(be)X
+2772(updated)X
+3046(in)X
+3128(an)X
+3224(atomic)X
+3462(fashion.)X
+3758(For)X
+3889(example,)X
+4201(the)X
+555 4086(traditional)N
+907(UNIX)X
+1131(\256le)X
+1256(system)X
+1501(uses)X
+1661(ordering)X
+1955(constraints)X
+2324(to)X
+2408(achieve)X
+2676(recoverability)X
+3144(in)X
+3228(the)X
+3348(face)X
+3505(of)X
+3594(crashes.)X
+3893(When)X
+4107(a)X
+4165(new)X
+555 4176(\256le)N
+678(is)X
+752(created,)X
+1026(its)X
+1122(inode)X
+1321(is)X
+1395(written)X
+1642(to)X
+1724(disk)X
+1877(before)X
+2103(the)X
+2221(new)X
+2375(\256le)X
+2497(is)X
+2570(added)X
+2782(to)X
+2864(the)X
+2982(directory)X
+3292(structure.)X
+3633(This)X
+3795(guarantees)X
+4159(that,)X
+555 4266(if)N
+627(the)X
+748(system)X
+993(crashes)X
+1253(between)X
+1544(the)X
+1665(two)X
+1808(I/O's,)X
+2016(the)X
+2137(directory)X
+2450(does)X
+2620(not)X
+2744(contain)X
+3002(a)X
+3060 0.4531(reference)AX
+3383(to)X
+3467(an)X
+3565(invalid)X
+3809(inode.)X
+4049(In)X
+4138(actu-)X
+555 4356(ality,)N
+741(the)X
+863(desired)X
+1119(effect)X
+1326(is)X
+1402(that)X
+1545(these)X
+1733(two)X
+1876(updates)X
+2144(have)X
+2319(the)X
+2440(transactional)X
+2873(property)X
+3168(of)X
+3258(atomicity)X
+3583(\(either)X
+3816(both)X
+3981(writes)X
+4200(are)X
+555 4446(visible)N
+790(or)X
+879(neither)X
+1124(is\).)X
+1266(Rather)X
+1501(than)X
+1660(building)X
+1947(special)X
+2191(purpose)X
+2466(recovery)X
+2769(mechanisms)X
+3186(into)X
+3331(the)X
+3450(\256le)X
+3573(system)X
+3816(or)X
+3904(related)X
+4144(tools)X
+555 4536(\()N
+2 f
+582(e.g.)X
+3 f
+726(fsck)X
+1 f
+864(\(8\)\),)X
+1033(one)X
+1177(could)X
+1383(use)X
+1518(general)X
+1783(purpose)X
+2064(transaction)X
+2443(recovery)X
+2752(protocols)X
+3077(after)X
+3252(system)X
+3501(failure.)X
+3778(Any)X
+3943(application)X
+555 4626(that)N
+705(needs)X
+918(to)X
+1010(keep)X
+1192(multiple,)X
+1508(related)X
+1757(\256les)X
+1920(\(or)X
+2044(directories\))X
+2440(consistent)X
+2790(should)X
+3032(do)X
+3141(so)X
+3241(using)X
+3443(transactions.)X
+3895(Source)X
+4147(code)X
+555 4716(control)N
+805(systems,)X
+1101(such)X
+1271(as)X
+1361(RCS)X
+1534(and)X
+1673(SCCS,)X
+1910(should)X
+2146(use)X
+2276(transaction)X
+2651(semantics)X
+2990(to)X
+3075(allow)X
+3276(the)X
+3397(``checking)X
+3764(in'')X
+3903(of)X
+3992(groups)X
+4232(of)X
+555 4806(related)N
+801(\256les.)X
+1001(In)X
+1095(this)X
+1237(way,)X
+1418(if)X
+1493(the)X
+1617 0.2841(``check-in'')AX
+2028(fails,)X
+2212(the)X
+2336(transaction)X
+2714(may)X
+2878(be)X
+2980(aborted,)X
+3267(backing)X
+3547(out)X
+3675(the)X
+3799(partial)X
+4030(``check-)X
+555 4896(in'')N
+691(leaving)X
+947(the)X
+1065(source)X
+1295(repository)X
+1640(in)X
+1722(a)X
+1778(consistent)X
+2118(state.)X
+755 5019(A)N
+842(second)X
+1094(situation)X
+1398(where)X
+1624(transactions)X
+2036(can)X
+2177(be)X
+2282(used)X
+2458(to)X
+2549(replace)X
+2811(current)X
+3068(ad-hoc)X
+3316(mechanisms)X
+3741(is)X
+3822(in)X
+3912(applications)X
+555 5109(where)N
+776(concurrent)X
+1144(updates)X
+1413(to)X
+1499(a)X
+1559(shared)X
+1793(\256le)X
+1919(are)X
+2042(desired,)X
+2318(but)X
+2444(there)X
+2629(is)X
+2706(logical)X
+2948(consistency)X
+3345(of)X
+3435(the)X
+3556(data)X
+3713(which)X
+3932(needs)X
+4138(to)X
+4223(be)X
+555 5199(preserved.)N
+928(For)X
+1059(example,)X
+1371(when)X
+1565(the)X
+1683(password)X
+2006(\256le)X
+2128(is)X
+2201(updated,)X
+2495(\256le)X
+2617(locking)X
+2877(is)X
+2950(used)X
+3117(to)X
+3199(disallow)X
+3490(concurrent)X
+3854(access.)X
+4120(Tran-)X
+555 5289(saction)N
+804(semantics)X
+1142(on)X
+1244(the)X
+1364(password)X
+1689(\256les)X
+1844(would)X
+2066(allow)X
+2266(concurrent)X
+2632(updates,)X
+2919(while)X
+3119(preserving)X
+3479(the)X
+3598(logical)X
+3837(consistency)X
+4232(of)X
+555 5379(the)N
+681(password)X
+1012(database.)X
+1357(Similarly,)X
+1702(UNIX)X
+1930(utilities)X
+2196(which)X
+2419(rewrite)X
+2674(\256les)X
+2834(face)X
+2996(a)X
+3059(potential)X
+3366(race)X
+3528(condition)X
+3857(between)X
+4152(their)X
+555 5469(rewriting)N
+871(a)X
+929(\256le)X
+1053(and)X
+1191(another)X
+1453(process)X
+1715(reading)X
+1977(the)X
+2096(\256le.)X
+2259(For)X
+2391(example,)X
+2704(the)X
+2823(compiler)X
+3129(\(more)X
+3342(precisely,)X
+3673(the)X
+3792(assembler\))X
+4161(may)X
+8 s
+10 f
+555 5541(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)N
+5 s
+1 f
+727 5619(1)N
+8 s
+763 5644(To)N
+850(appear)X
+1035(in)X
+1101(the)X
+2 f
+1195(Proceedings)X
+1530(of)X
+1596(the)X
+1690(1992)X
+1834(Winter)X
+2024(Usenix)X
+1 f
+2201(,)X
+2233(San)X
+2345(Francisco,)X
+2625(CA,)X
+2746(January)X
+2960(1992.)X
+
+2 p
+%%Page: 2 2
+8 s 8 xH 0 xS 1 f
+10 s
+3 f
+1 f
+555 630(have)N
+737(to)X
+829(rewrite)X
+1087(a)X
+1152(\256le)X
+1283(to)X
+1374(which)X
+1599(it)X
+1672(has)X
+1808(write)X
+2002(permission)X
+2382(in)X
+2473(a)X
+2538(directory)X
+2857(to)X
+2948(which)X
+3173(it)X
+3246(does)X
+3422(not)X
+3553(have)X
+3734(write)X
+3928(permission.)X
+555 720(While)N
+779(the)X
+904(``.o'')X
+1099(\256le)X
+1228(is)X
+1308(being)X
+1513(written,)X
+1787(another)X
+2055(utility)X
+2272(such)X
+2446(as)X
+3 f
+2540(nm)X
+1 f
+2651(\(1\))X
+2772(or)X
+3 f
+2866(ar)X
+1 f
+2942(\(1\))X
+3063(may)X
+3228(read)X
+3394(the)X
+3519(\256le)X
+3648(and)X
+3791(produce)X
+4077(invalid)X
+555 810(results)N
+790(since)X
+981(the)X
+1105(\256le)X
+1233(has)X
+1366(not)X
+1494(been)X
+1672(completely)X
+2054(written.)X
+2347(Currently,)X
+2700(some)X
+2895(utilities)X
+3160(use)X
+3293(special)X
+3542(purpose)X
+3821(code)X
+3998(to)X
+4085(handle)X
+555 900(such)N
+722(cases)X
+912(while)X
+1110(others)X
+1326(ignore)X
+1551(the)X
+1669(problem)X
+1956(and)X
+2092(force)X
+2278(users)X
+2463(to)X
+2545(live)X
+2685(with)X
+2847(the)X
+2965(consequences.)X
+755 1023(In)N
+845(this)X
+983(paper,)X
+1205(we)X
+1322(present)X
+1577(a)X
+1635(simple)X
+1870(library)X
+2106(which)X
+2324(provides)X
+2622(transaction)X
+2996(semantics)X
+3334(\(atomicity,)X
+3705(consistency,)X
+4121(isola-)X
+555 1113(tion,)N
+720(and)X
+857(durability\).)X
+1236(The)X
+1382(4.4BSD)X
+1658(database)X
+1956(access)X
+2182(methods)X
+2473(have)X
+2645(been)X
+2817(modi\256ed)X
+3121(to)X
+3203(use)X
+3330(this)X
+3465(library,)X
+3719(optionally)X
+4063(provid-)X
+555 1203(ing)N
+682(shared)X
+917(buffer)X
+1139(management)X
+1574(between)X
+1867(applications,)X
+2298(locking,)X
+2582(and)X
+2722(transaction)X
+3098(semantics.)X
+3478(Any)X
+3640(UNIX)X
+3865(program)X
+4161(may)X
+555 1293(transaction)N
+930(protect)X
+1176(its)X
+1274(data)X
+1430(by)X
+1532(requesting)X
+1888(transaction)X
+2262(protection)X
+2609(with)X
+2773(the)X
+3 f
+2893(db)X
+1 f
+2981(\(3\))X
+3097(library)X
+3333(or)X
+3422(by)X
+3524(adding)X
+3764(appropriate)X
+4152(calls)X
+555 1383(to)N
+646(the)X
+773(transaction)X
+1154(manager,)X
+1480(buffer)X
+1706(manager,)X
+2032(lock)X
+2199(manager,)X
+2525(and)X
+2670(log)X
+2801(manager.)X
+3147(The)X
+3301(library)X
+3543(routines)X
+3829(may)X
+3995(be)X
+4099(linked)X
+555 1473(into)N
+708(the)X
+834(host)X
+995(application)X
+1379(and)X
+1523(called)X
+1743(by)X
+1851(subroutine)X
+2217(interface,)X
+2547(or)X
+2642(they)X
+2808(may)X
+2974(reside)X
+3194(in)X
+3284(a)X
+3348(separate)X
+3640(server)X
+3865(process.)X
+4174(The)X
+555 1563(server)N
+772(architecture)X
+1172(provides)X
+1468(for)X
+1582(network)X
+1865(access)X
+2091(and)X
+2227(better)X
+2430(protection)X
+2775(mechanisms.)X
+3 f
+555 1749(2.)N
+655(Related)X
+938(Work)X
+1 f
+755 1872(There)N
+1000(has)X
+1164(been)X
+1373(much)X
+1608(discussion)X
+1998(in)X
+2117(recent)X
+2371(years)X
+2597(about)X
+2831(new)X
+3021(transaction)X
+3429(models)X
+3716(and)X
+3888(architectures)X
+555 1962 0.1172([SPEC88][NODI90][CHEN91][MOHA91].)AN
+2009(Much)X
+2220(of)X
+2310(this)X
+2448(work)X
+2636(focuses)X
+2900(on)X
+3003(new)X
+3160(ways)X
+3348(to)X
+3433(model)X
+3656(transactions)X
+4062(and)X
+4201(the)X
+555 2052(interactions)N
+953(between)X
+1245(them,)X
+1449(while)X
+1651(the)X
+1772(work)X
+1960(presented)X
+2291(here)X
+2453(focuses)X
+2717(on)X
+2820(the)X
+2941(implementation)X
+3466(and)X
+3605(performance)X
+4035(of)X
+4125(tradi-)X
+555 2142(tional)N
+757(transaction)X
+1129(techniques)X
+1492(\(write-ahead)X
+1919(logging)X
+2183(and)X
+2319(two-phase)X
+2669(locking\))X
+2956(on)X
+3056(a)X
+3112(standard)X
+3404(operating)X
+3727(system)X
+3969(\(UNIX\).)X
+755 2265(Such)N
+947(traditional)X
+1308(operating)X
+1643(systems)X
+1928(are)X
+2059(often)X
+2256(criticized)X
+2587(for)X
+2713(their)X
+2892(inability)X
+3190(to)X
+3283(perform)X
+3573(transaction)X
+3956(processing)X
+555 2355(adequately.)N
+971([STON81])X
+1342(cites)X
+1517(three)X
+1706(main)X
+1894(areas)X
+2088(of)X
+2183(inadequate)X
+2559(support:)X
+2849(buffer)X
+3074(management,)X
+3532(the)X
+3658(\256le)X
+3788(system,)X
+4058(and)X
+4201(the)X
+555 2445(process)N
+823(structure.)X
+1191(These)X
+1410(arguments)X
+1771(are)X
+1897(summarized)X
+2316(in)X
+2405(table)X
+2587(one.)X
+2769(Fortunately,)X
+3184(much)X
+3388(has)X
+3521(changed)X
+3815(since)X
+4006(1981.)X
+4232(In)X
+555 2535(the)N
+683(area)X
+848(of)X
+945(buffer)X
+1172(management,)X
+1632(most)X
+1817(UNIX)X
+2048(systems)X
+2331(provide)X
+2606(the)X
+2734(ability)X
+2968(to)X
+3060(memory)X
+3357(map)X
+3525(\256les,)X
+3708(thus)X
+3870(obviating)X
+4201(the)X
+555 2625(need)N
+734(for)X
+855(a)X
+918(copy)X
+1101(between)X
+1396(kernel)X
+1624(and)X
+1766(user)X
+1926(space.)X
+2171(If)X
+2251(a)X
+2313(database)X
+2616(system)X
+2864(is)X
+2943(going)X
+3151(to)X
+3239(use)X
+3372(the)X
+3496(\256le)X
+3624(system)X
+3872(buffer)X
+4095(cache,)X
+555 2715(then)N
+719(a)X
+781(system)X
+1029(call)X
+1171(is)X
+1250(required.)X
+1584(However,)X
+1924(if)X
+1998(buffering)X
+2322(is)X
+2400(provided)X
+2710(at)X
+2793(user)X
+2952(level)X
+3133(using)X
+3331(shared)X
+3566(memory,)X
+3878(as)X
+3970(in)X
+4057(LIBTP,)X
+555 2805(buffer)N
+776(management)X
+1210(is)X
+1287(only)X
+1452(as)X
+1542(slow)X
+1716(as)X
+1806(access)X
+2035(to)X
+2120(shared)X
+2353(memory)X
+2643(and)X
+2782(any)X
+2921(replacement)X
+3337(algorithm)X
+3671(may)X
+3832(be)X
+3931(used.)X
+4121(Since)X
+555 2895(multiple)N
+849(processes)X
+1185(can)X
+1325(access)X
+1559(the)X
+1685(shared)X
+1923(data,)X
+2105(prefetching)X
+2499(may)X
+2665(be)X
+2769(accomplished)X
+3238(by)X
+3346(separate)X
+3638(processes)X
+3973(or)X
+4067(threads)X
+555 2985(whose)N
+782(sole)X
+932(purpose)X
+1207(is)X
+1281(to)X
+1364(prefetch)X
+1649(pages)X
+1853(and)X
+1990(wait)X
+2149(on)X
+2250(them.)X
+2471(There)X
+2680(is)X
+2754(still)X
+2894(no)X
+2995(way)X
+3150(to)X
+3233(enforce)X
+3496(write)X
+3682(ordering)X
+3975(other)X
+4161(than)X
+555 3075(keeping)N
+829(pages)X
+1032(in)X
+1114(user)X
+1268(memory)X
+1555(and)X
+1691(using)X
+1884(the)X
+3 f
+2002(fsync)X
+1 f
+2180(\(3\))X
+2294(system)X
+2536(call)X
+2672(to)X
+2754(perform)X
+3033(synchronous)X
+3458(writes.)X
+755 3198(In)N
+845(the)X
+966(area)X
+1124(of)X
+1214(\256le)X
+1339(systems,)X
+1635(the)X
+1756(fast)X
+1895(\256le)X
+2020(system)X
+2265(\(FFS\))X
+2474([MCKU84])X
+2871(allows)X
+3103(allocation)X
+3442(in)X
+3527(units)X
+3704(up)X
+3806(to)X
+3890(64KBytes)X
+4232(as)X
+555 3288(opposed)N
+846(to)X
+932(the)X
+1054(4KByte)X
+1327(and)X
+1466(8KByte)X
+1738(\256gures)X
+1979(quoted)X
+2220(in)X
+2305([STON81].)X
+2711(The)X
+2859(measurements)X
+3341(in)X
+3426(this)X
+3564(paper)X
+3766(were)X
+3946(taken)X
+4143(from)X
+555 3378(an)N
+655(8KByte)X
+928(FFS,)X
+1104(but)X
+1230(as)X
+1320(LIBTP)X
+1565(runs)X
+1726(exclusively)X
+2114(in)X
+2199(user)X
+2356(space,)X
+2578(there)X
+2762(is)X
+2838(nothing)X
+3105(to)X
+3190(prevent)X
+3454(it)X
+3521(from)X
+3700(being)X
+3901(run)X
+4031(on)X
+4134(other)X
+555 3468(UNIX)N
+776(compatible)X
+1152(\256le)X
+1274(systems)X
+1547(\(e.g.)X
+1710(log-structured)X
+2180([ROSE91],)X
+2558(extent-based,)X
+3004(or)X
+3091(multi-block)X
+3484([SELT91]\).)X
+755 3591(Finally,)N
+1029(with)X
+1199(regard)X
+1433(to)X
+1523(the)X
+1648(process)X
+1916(structure,)X
+2244(neither)X
+2494(context)X
+2757(switch)X
+2993(time)X
+3162(nor)X
+3296(scheduling)X
+3670(around)X
+3920(semaphores)X
+555 3681(seems)N
+785(to)X
+881(affect)X
+1099(the)X
+1231(system)X
+1487(performance.)X
+1968(However,)X
+2317(the)X
+2449(implementation)X
+2984(of)X
+3084(semaphores)X
+3496(can)X
+3641(impact)X
+3892(performance)X
+555 3771(tremendously.)N
+1051(This)X
+1213(is)X
+1286(discussed)X
+1613(in)X
+1695(more)X
+1880(detail)X
+2078(in)X
+2160(section)X
+2407(4.3.)X
+755 3894(The)N
+908(Tuxedo)X
+1181(system)X
+1431(from)X
+1615(AT&T)X
+1861(is)X
+1941(a)X
+2004(transaction)X
+2383(manager)X
+2687(which)X
+2910(coordinates)X
+3307(distributed)X
+3676(transaction)X
+4055(commit)X
+555 3984(from)N
+738(a)X
+801(variety)X
+1051(of)X
+1145(different)X
+1449(local)X
+1632(transaction)X
+2011(managers.)X
+2386(At)X
+2493(this)X
+2634(time,)X
+2822(LIBTP)X
+3070(does)X
+3243(not)X
+3371(have)X
+3549(its)X
+3650(own)X
+3814(mechanism)X
+4205(for)X
+555 4074(distributed)N
+942(commit)X
+1231(processing,)X
+1639(but)X
+1786(could)X
+2009(be)X
+2130(used)X
+2322(as)X
+2434(a)X
+2515(local)X
+2716(transaction)X
+3113(agent)X
+3331(by)X
+3455(systems)X
+3752(such)X
+3943(as)X
+4054(Tuxedo)X
+555 4164([ANDR89].)N
+10 f
+863 4393(i)N
+870(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+903 4483(Buffer)N
+1133(Management)X
+10 f
+1672(g)X
+1 f
+1720(Data)X
+1892(must)X
+2067(be)X
+2163(copied)X
+2397(between)X
+2685(kernel)X
+2906(space)X
+3105(and)X
+3241(user)X
+3395(space.)X
+10 f
+1672 4573(g)N
+1 f
+1720(Buffer)X
+1950(pool)X
+2112(access)X
+2338(is)X
+2411(too)X
+2533(slow.)X
+10 f
+1672 4663(g)N
+1 f
+1720(There)X
+1928(is)X
+2001(no)X
+2101(way)X
+2255(to)X
+2337(request)X
+2589(prefetch.)X
+10 f
+1672 4753(g)N
+1 f
+1720(Replacement)X
+2159(is)X
+2232(usually)X
+2483(LRU)X
+2663(which)X
+2879(may)X
+3037(be)X
+3133(suboptimal)X
+3508(for)X
+3622(databases.)X
+10 f
+1672 4843(g)N
+1 f
+1720(There)X
+1928(is)X
+2001(no)X
+2101(way)X
+2255(to)X
+2337(guarantee)X
+2670(write)X
+2855(ordering.)X
+10 f
+863 4853(i)N
+870(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+903 4943(File)N
+1047(System)X
+10 f
+1672(g)X
+1 f
+1720(Allocation)X
+2078(is)X
+2151(done)X
+2327(in)X
+2409(small)X
+2602(blocks)X
+2831(\(usually)X
+3109(4K)X
+3227(or)X
+3314(8K\).)X
+10 f
+1672 5033(g)N
+1 f
+1720(Logical)X
+1985(organization)X
+2406(of)X
+2493(\256les)X
+2646(is)X
+2719(redundantly)X
+3122(expressed.)X
+10 f
+863 5043(i)N
+870(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+903 5133(Process)N
+1168(Structure)X
+10 f
+1672(g)X
+1 f
+1720(Context)X
+1993(switching)X
+2324(and)X
+2460(message)X
+2752(passing)X
+3012(are)X
+3131(too)X
+3253(slow.)X
+10 f
+1672 5223(g)N
+1 f
+1720(A)X
+1798(process)X
+2059(may)X
+2217(be)X
+2313(descheduled)X
+2730(while)X
+2928(holding)X
+3192(a)X
+3248(semaphore.)X
+10 f
+863 5233(i)N
+870(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+863(c)X
+5193(c)Y
+5113(c)Y
+5033(c)Y
+4953(c)Y
+4873(c)Y
+4793(c)Y
+4713(c)Y
+4633(c)Y
+4553(c)Y
+4473(c)Y
+3990 5233(c)N
+5193(c)Y
+5113(c)Y
+5033(c)Y
+4953(c)Y
+4873(c)Y
+4793(c)Y
+4713(c)Y
+4633(c)Y
+4553(c)Y
+4473(c)Y
+3 f
+1156 5446(Table)N
+1371(One:)X
+1560(Shortcomings)X
+2051(of)X
+2138(UNIX)X
+2363(transaction)X
+2770(support)X
+3056(cited)X
+3241(in)X
+3327([STON81].)X
+
+3 p
+%%Page: 3 3
+10 s 10 xH 0 xS 3 f
+1 f
+755 630(The)N
+901(transaction)X
+1274(architecture)X
+1675(presented)X
+2004(in)X
+2087([YOUN91])X
+2474(is)X
+2548(very)X
+2712(similar)X
+2955(to)X
+3038(that)X
+3179(implemented)X
+3618(in)X
+3701(the)X
+3820(LIBTP.)X
+4103(While)X
+555 720([YOUN91])N
+947(presents)X
+1236(a)X
+1298(model)X
+1524(for)X
+1644(providing)X
+1981(transaction)X
+2359(services,)X
+2663(this)X
+2803(paper)X
+3007(focuses)X
+3273(on)X
+3378(the)X
+3501(implementation)X
+4028(and)X
+4169(per-)X
+555 810(formance)N
+881(of)X
+970(a)X
+1028(particular)X
+1358(system.)X
+1642(In)X
+1731(addition,)X
+2034(we)X
+2149(provide)X
+2415(detailed)X
+2690(comparisons)X
+3116(with)X
+3279(alternative)X
+3639(solutions:)X
+3970(traditional)X
+555 900(UNIX)N
+776(services)X
+1055(and)X
+1191(commercial)X
+1590(database)X
+1887(management)X
+2317(systems.)X
+3 f
+555 1086(3.)N
+655(Architecture)X
+1 f
+755 1209(The)N
+906(library)X
+1146(is)X
+1224(designed)X
+1534(to)X
+1621(provide)X
+1891(well)X
+2054(de\256ned)X
+2315(interfaces)X
+2653(to)X
+2740(the)X
+2863(services)X
+3147(required)X
+3440(for)X
+3559(transaction)X
+3936(processing.)X
+555 1299(These)N
+777(services)X
+1066(are)X
+1195(recovery,)X
+1527(concurrency)X
+1955(control,)X
+2232(and)X
+2378(the)X
+2506(management)X
+2946(of)X
+3043(shared)X
+3283(data.)X
+3487(First)X
+3663(we)X
+3787(will)X
+3941(discuss)X
+4201(the)X
+555 1389(design)N
+795(tradeoffs)X
+1112(in)X
+1205(the)X
+1334(selection)X
+1650(of)X
+1748(recovery,)X
+2081(concurrency)X
+2510(control,)X
+2787(and)X
+2933(buffer)X
+3160(management)X
+3600(implementations,)X
+4183(and)X
+555 1479(then)N
+713(we)X
+827(will)X
+971(present)X
+1223(the)X
+1341(overall)X
+1584(library)X
+1818(architecture)X
+2218(and)X
+2354(module)X
+2614(descriptions.)X
+3 f
+555 1665(3.1.)N
+715(Design)X
+966(Tradeoffs)X
+1 f
+3 f
+555 1851(3.1.1.)N
+775(Crash)X
+1004(Recovery)X
+1 f
+755 1974(The)N
+909(recovery)X
+1220(protocol)X
+1516(is)X
+1598(responsible)X
+1992(for)X
+2115(providing)X
+2455(the)X
+2582(transaction)X
+2963(semantics)X
+3308(discussed)X
+3644(earlier.)X
+3919(There)X
+4136(are)X
+4263(a)X
+555 2064(wide)N
+739(range)X
+946(of)X
+1041(recovery)X
+1351(protocols)X
+1677(available)X
+1995([HAER83],)X
+2395(but)X
+2525(we)X
+2647(can)X
+2786(crudely)X
+3054(divide)X
+3281(them)X
+3468(into)X
+3619(two)X
+3766(main)X
+3953(categories.)X
+555 2154(The)N
+706(\256rst)X
+856(category)X
+1159(records)X
+1422(all)X
+1528(modi\256cations)X
+1989(to)X
+2077(the)X
+2201(database)X
+2504(in)X
+2592(a)X
+2653(separate)X
+2942(\256le,)X
+3089(and)X
+3230(uses)X
+3393(this)X
+3533(\256le)X
+3660(\(log\))X
+3841(to)X
+3928(back)X
+4105(out)X
+4232(or)X
+555 2244(reapply)N
+825(these)X
+1019(modi\256cations)X
+1483(if)X
+1561(a)X
+1626(transaction)X
+2007(aborts)X
+2232(or)X
+2328(the)X
+2455(system)X
+2706(crashes.)X
+3012(We)X
+3153(call)X
+3298(this)X
+3442(set)X
+3560(the)X
+3 f
+3687(logging)X
+3963(protocols)X
+1 f
+4279(.)X
+555 2334(The)N
+703(second)X
+949(category)X
+1249(avoids)X
+1481(the)X
+1602(use)X
+1732(of)X
+1822(a)X
+1881(log)X
+2006(by)X
+2109(carefully)X
+2418(controlling)X
+2792(when)X
+2989(data)X
+3146(are)X
+3268(written)X
+3518(to)X
+3603(disk.)X
+3799(We)X
+3934(call)X
+4073(this)X
+4210(set)X
+555 2424(the)N
+3 f
+673(non-logging)X
+1096(protocols)X
+1 f
+1412(.)X
+755 2547(Non-logging)N
+1185(protocols)X
+1504(hold)X
+1666(dirty)X
+1837(buffers)X
+2085(in)X
+2167(main)X
+2347(memory)X
+2634(or)X
+2721(temporary)X
+3071(\256les)X
+3224(until)X
+3390(commit)X
+3654(and)X
+3790(then)X
+3948(force)X
+4134(these)X
+555 2637(pages)N
+769(to)X
+862(disk)X
+1026(at)X
+1115(transaction)X
+1498(commit.)X
+1813(While)X
+2040(we)X
+2165(can)X
+2308(use)X
+2446(temporary)X
+2807(\256les)X
+2971(to)X
+3064(hold)X
+3237(dirty)X
+3418(pages)X
+3631(that)X
+3781(may)X
+3949(need)X
+4131(to)X
+4223(be)X
+555 2727(evicted)N
+810(from)X
+988(memory)X
+1277(during)X
+1508(a)X
+1566(long-running)X
+2006(transaction,)X
+2400(the)X
+2520(only)X
+2684(user-level)X
+3023(mechanism)X
+3410(to)X
+3494(force)X
+3682(pages)X
+3887(to)X
+3971(disk)X
+4126(is)X
+4201(the)X
+3 f
+555 2817(fsync)N
+1 f
+733(\(2\))X
+850(system)X
+1095(call.)X
+1274(Unfortunately,)X
+3 f
+1767(fsync)X
+1 f
+1945(\(2\))X
+2062(is)X
+2138(an)X
+2237(expensive)X
+2581(system)X
+2826(call)X
+2965(in)X
+3050(that)X
+3193(it)X
+3260(forces)X
+3480(all)X
+3583(pages)X
+3789(of)X
+3879(a)X
+3938(\256le)X
+4062(to)X
+4146(disk,)X
+555 2907(and)N
+691(transactions)X
+1094(that)X
+1234(manage)X
+1504(more)X
+1689(than)X
+1847(one)X
+1983(\256le)X
+2105(must)X
+2280(issue)X
+2460(one)X
+2596(call)X
+2732(per)X
+2855(\256le.)X
+755 3030(In)N
+853(addition,)X
+3 f
+1166(fsync)X
+1 f
+1344(\(2\))X
+1469(provides)X
+1776(no)X
+1887(way)X
+2051(to)X
+2143(control)X
+2400(the)X
+2528(order)X
+2728(in)X
+2820(which)X
+3046(dirty)X
+3227(pages)X
+3440(are)X
+3569(written)X
+3826(to)X
+3918(disk.)X
+4121(Since)X
+555 3120(non-logging)N
+976(protocols)X
+1304(must)X
+1489(sometimes)X
+1861(order)X
+2061(writes)X
+2287(carefully)X
+2603([SULL92],)X
+2987(they)X
+3155(are)X
+3284(dif\256cult)X
+3567(to)X
+3659(implement)X
+4030(on)X
+4139(Unix)X
+555 3210(systems.)N
+868(As)X
+977(a)X
+1033(result,)X
+1251(we)X
+1365(have)X
+1537(chosen)X
+1780(to)X
+1862(implement)X
+2224(a)X
+2280(logging)X
+2544(protocol.)X
+755 3333(Logging)N
+1050(protocols)X
+1372(may)X
+1534(be)X
+1634(categorized)X
+2029(based)X
+2236(on)X
+2340(how)X
+2502(information)X
+2904(is)X
+2981(logged)X
+3223(\(physically)X
+3602(or)X
+3692(logically\))X
+4022(and)X
+4161(how)X
+555 3423(much)N
+767(is)X
+854(logged)X
+1106(\(before)X
+1373(images,)X
+1654(after)X
+1836(images)X
+2097(or)X
+2198(both\).)X
+2441(In)X
+3 f
+2542(physical)X
+2855(logging)X
+1 f
+3103(,)X
+3157(images)X
+3417(of)X
+3517(complete)X
+3844(physical)X
+4144(units)X
+555 3513(\(pages)N
+786(or)X
+874(buffers\))X
+1150(are)X
+1270(recorded,)X
+1593(while)X
+1792(in)X
+3 f
+1875(logical)X
+2118(logging)X
+1 f
+2387(a)X
+2444(description)X
+2820(of)X
+2907(the)X
+3025(operation)X
+3348(is)X
+3421(recorded.)X
+3763(Therefore,)X
+4121(while)X
+555 3603(we)N
+675(may)X
+839(record)X
+1071(entire)X
+1280(pages)X
+1489(in)X
+1577(a)X
+1639(physical)X
+1932(log,)X
+2080(we)X
+2200(need)X
+2378(only)X
+2546(record)X
+2777(the)X
+2900(records)X
+3162(being)X
+3365(modi\256ed)X
+3674(in)X
+3761(a)X
+3822(logical)X
+4065(log.)X
+4232(In)X
+555 3693(fact,)N
+718(physical)X
+1006(logging)X
+1271(can)X
+1404(be)X
+1501(thought)X
+1766(of)X
+1854(as)X
+1942(a)X
+1999(special)X
+2243(case)X
+2403(of)X
+2491(logical)X
+2730(logging,)X
+3015(since)X
+3201(the)X
+3320 0.3125(``records'')AX
+3686(that)X
+3827(we)X
+3942(log)X
+4065(in)X
+4148(logi-)X
+555 3783(cal)N
+673(logging)X
+941(might)X
+1151(be)X
+1251(physical)X
+1542(pages.)X
+1789(Since)X
+1991(logical)X
+2233(logging)X
+2501(is)X
+2578(both)X
+2743(more)X
+2931(space-ef\256cient)X
+3423(and)X
+3562(more)X
+3750(general,)X
+4030(we)X
+4147(have)X
+555 3873(chosen)N
+798(it)X
+862(for)X
+976(our)X
+1103(logging)X
+1367(protocol.)X
+755 3996(In)N
+3 f
+843(before-image)X
+1315(logging)X
+1 f
+1563(,)X
+1604(we)X
+1719(log)X
+1842(a)X
+1899(copy)X
+2076(of)X
+2164(the)X
+2283(data)X
+2438(before)X
+2665(the)X
+2784(update,)X
+3039(while)X
+3238(in)X
+3 f
+3321(after-image)X
+3739(logging)X
+1 f
+3987(,)X
+4027(we)X
+4141(log)X
+4263(a)X
+555 4086(copy)N
+740(of)X
+836(the)X
+963(data)X
+1126(after)X
+1303(the)X
+1429(update.)X
+1711(If)X
+1793(we)X
+1915(log)X
+2045(only)X
+2215(before-images,)X
+2723(then)X
+2889(there)X
+3078(is)X
+3159(suf\256cient)X
+3485(information)X
+3891(in)X
+3981(the)X
+4107(log)X
+4237(to)X
+555 4176(allow)N
+761(us)X
+860(to)X
+3 f
+950(undo)X
+1 f
+1150(the)X
+1276(transaction)X
+1656(\(go)X
+1791(back)X
+1971(to)X
+2061(the)X
+2187(state)X
+2361(represented)X
+2759(by)X
+2866(the)X
+2991(before-image\).)X
+3514(However,)X
+3876(if)X
+3952(the)X
+4077(system)X
+555 4266(crashes)N
+814(and)X
+952(a)X
+1010(committed)X
+1374(transaction's)X
+1806(changes)X
+2087(have)X
+2261(not)X
+2385(reached)X
+2658(the)X
+2778(disk,)X
+2953(we)X
+3068(have)X
+3241(no)X
+3342(means)X
+3568(to)X
+3 f
+3651(redo)X
+1 f
+3828(the)X
+3947(transaction)X
+555 4356(\(reapply)N
+849(the)X
+973(updates\).)X
+1311(Therefore,)X
+1675(logging)X
+1945(only)X
+2113(before-images)X
+2599(necessitates)X
+3004(forcing)X
+3262(dirty)X
+3439(pages)X
+3648(at)X
+3732(commit)X
+4002(time.)X
+4210(As)X
+555 4446(mentioned)N
+913(above,)X
+1145(forcing)X
+1397(pages)X
+1600(at)X
+1678(commit)X
+1942(is)X
+2015(considered)X
+2383(too)X
+2505(costly.)X
+755 4569(If)N
+834(we)X
+953(log)X
+1080(only)X
+1247(after-images,)X
+1694(then)X
+1857(there)X
+2043(is)X
+2121(suf\256cient)X
+2444(information)X
+2847(in)X
+2934(the)X
+3057(log)X
+3184(to)X
+3271(allow)X
+3474(us)X
+3570(to)X
+3657(redo)X
+3825(the)X
+3947(transaction)X
+555 4659(\(go)N
+687(forward)X
+967(to)X
+1054(the)X
+1177(state)X
+1348(represented)X
+1743(by)X
+1847(the)X
+1969(after-image\),)X
+2411(but)X
+2537(we)X
+2655(do)X
+2759(not)X
+2885(have)X
+3061(the)X
+3183(information)X
+3585(required)X
+3877(to)X
+3963(undo)X
+4147(tran-)X
+555 4749(sactions)N
+845(which)X
+1073(aborted)X
+1346(after)X
+1526(dirty)X
+1709(pages)X
+1924(were)X
+2113(written)X
+2372(to)X
+2466(disk.)X
+2670(Therefore,)X
+3039(logging)X
+3314(only)X
+3487(after-images)X
+3920(necessitates)X
+555 4839(holding)N
+819(all)X
+919(dirty)X
+1090(buffers)X
+1338(in)X
+1420(main)X
+1600(memory)X
+1887(until)X
+2053(commit)X
+2317(or)X
+2404(writing)X
+2655(them)X
+2835(to)X
+2917(a)X
+2973(temporary)X
+3323(\256le.)X
+755 4962(Since)N
+956(neither)X
+1202(constraint)X
+1541(\(forcing)X
+1823(pages)X
+2029(on)X
+2132(commit)X
+2399(or)X
+2489(buffering)X
+2811(pages)X
+3016(until)X
+3184(commit\))X
+3477(was)X
+3624(feasible,)X
+3916(we)X
+4032(chose)X
+4237(to)X
+555 5052(log)N
+683(both)X
+851(before)X
+1083(and)X
+1225(after)X
+1399(images.)X
+1672(The)X
+1823(only)X
+1991(remaining)X
+2342(consideration)X
+2800(is)X
+2879(when)X
+3079(changes)X
+3363(get)X
+3486(written)X
+3738(to)X
+3825(disk.)X
+4023(Changes)X
+555 5142(affect)N
+764(both)X
+931(data)X
+1090(pages)X
+1298(and)X
+1438(the)X
+1560(log.)X
+1726(If)X
+1804(the)X
+1926(changed)X
+2218(data)X
+2376(page)X
+2552(is)X
+2629(written)X
+2880(before)X
+3110(the)X
+3232(log)X
+3358(page,)X
+3554(and)X
+3694(the)X
+3816(system)X
+4062(crashes)X
+555 5232(before)N
+787(the)X
+911(log)X
+1039(page)X
+1217(is)X
+1296(written,)X
+1569(the)X
+1693(log)X
+1820(will)X
+1969(contain)X
+2230(insuf\256cient)X
+2615(information)X
+3018(to)X
+3105(undo)X
+3290(the)X
+3413(change.)X
+3706(This)X
+3873(violates)X
+4147(tran-)X
+555 5322(saction)N
+803(semantics,)X
+1160(since)X
+1346(some)X
+1536(changed)X
+1825(data)X
+1980(pages)X
+2184(may)X
+2343(not)X
+2466(have)X
+2638(been)X
+2810(written,)X
+3077(and)X
+3213(the)X
+3331(database)X
+3628(cannot)X
+3862(be)X
+3958(restored)X
+4237(to)X
+555 5412(its)N
+650(pre-transaction)X
+1152(state.)X
+755 5535(The)N
+914(log)X
+1050(record)X
+1290(describing)X
+1658(an)X
+1768(update)X
+2016(must)X
+2205(be)X
+2315(written)X
+2576(to)X
+2672(stable)X
+2893(storage)X
+3159(before)X
+3398(the)X
+3529(modi\256ed)X
+3846(page.)X
+4071(This)X
+4246(is)X
+3 f
+555 5625(write-ahead)N
+992(logging)X
+1 f
+1240(.)X
+1307(If)X
+1388(log)X
+1517(records)X
+1781(are)X
+1907(safely)X
+2126(written)X
+2380(to)X
+2469(disk,)X
+2649(data)X
+2810(pages)X
+3020(may)X
+3185(be)X
+3288(written)X
+3542(at)X
+3627(any)X
+3770(time)X
+3939(afterwards.)X
+555 5715(This)N
+721(means)X
+950(that)X
+1094(the)X
+1216(only)X
+1382(\256le)X
+1508(that)X
+1652(ever)X
+1815(needs)X
+2022(to)X
+2108(be)X
+2208(forced)X
+2438(to)X
+2524(disk)X
+2681(is)X
+2758(the)X
+2880(log.)X
+3046(Since)X
+3248(the)X
+3370(log)X
+3495(is)X
+3571(append-only,)X
+4015(modi\256ed)X
+
+4 p
+%%Page: 4 4
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+555 630(pages)N
+760(always)X
+1005(appear)X
+1242(at)X
+1322(the)X
+1442(end)X
+1580(and)X
+1718(may)X
+1878(be)X
+1976(written)X
+2224(to)X
+2307(disk)X
+2461(ef\256ciently)X
+2807(in)X
+2890(any)X
+3027(\256le)X
+3150(system)X
+3393(that)X
+3534(favors)X
+3756(sequential)X
+4102(order-)X
+555 720(ing)N
+677(\()X
+2 f
+704(e.g.)X
+1 f
+820(,)X
+860(FFS,)X
+1032(log-structured)X
+1502(\256le)X
+1624(system,)X
+1886(or)X
+1973(an)X
+2069(extent-based)X
+2495(system\).)X
+3 f
+555 906(3.1.2.)N
+775(Concurrency)X
+1245(Control)X
+1 f
+755 1029(The)N
+918(concurrency)X
+1354(control)X
+1619(protocol)X
+1923(is)X
+2013(responsible)X
+2415(for)X
+2546(maintaining)X
+2965(consistency)X
+3376(in)X
+3475(the)X
+3610(presence)X
+3929(of)X
+4033(multiple)X
+555 1119(accesses.)N
+897(There)X
+1114(are)X
+1242(several)X
+1499(alternative)X
+1867(solutions)X
+2183(such)X
+2358(as)X
+2453(locking,)X
+2741(optimistic)X
+3088(concurrency)X
+3514(control)X
+3769([KUNG81],)X
+4183(and)X
+555 1209(timestamp)N
+912(ordering)X
+1208([BERN80].)X
+1619(Since)X
+1821(optimistic)X
+2164(methods)X
+2459(and)X
+2599(timestamp)X
+2956(ordering)X
+3252(are)X
+3374(generally)X
+3696(more)X
+3884(complex)X
+4183(and)X
+555 1299(restrict)N
+804(concurrency)X
+1228(without)X
+1498(eliminating)X
+1888(starvation)X
+2230(or)X
+2323(deadlocks,)X
+2690(we)X
+2810(chose)X
+3018(two-phase)X
+3373(locking)X
+3638(\(2PL\).)X
+3890(Strict)X
+4088(2PL)X
+4246(is)X
+555 1389(suboptimal)N
+935(for)X
+1054(certain)X
+1297(data)X
+1455(structures)X
+1791(such)X
+1962(as)X
+2053(B-trees)X
+2309(because)X
+2588(it)X
+2656(can)X
+2792(limit)X
+2966(concurrency,)X
+3408(so)X
+3503(we)X
+3621(use)X
+3752(a)X
+3812(special)X
+4059(locking)X
+555 1479(protocol)N
+842(based)X
+1045(on)X
+1145(one)X
+1281(described)X
+1609(in)X
+1691([LEHM81].)X
+755 1602(The)N
+901(B-tree)X
+1123(locking)X
+1384(protocol)X
+1672(we)X
+1787(implemented)X
+2226(releases)X
+2502(locks)X
+2691(at)X
+2769(internal)X
+3034(nodes)X
+3241(in)X
+3323(the)X
+3441(tree)X
+3582(as)X
+3669(it)X
+3733(descends.)X
+4083(A)X
+4161(lock)X
+555 1692(on)N
+658(an)X
+757(internal)X
+1025(page)X
+1200(is)X
+1276(always)X
+1522(released)X
+1808(before)X
+2036(a)X
+2094(lock)X
+2254(on)X
+2356(its)X
+2453(child)X
+2635(is)X
+2710(obtained)X
+3008(\(that)X
+3177(is,)X
+3272(locks)X
+3463(are)X
+3584(not)X
+3 f
+3708(coupled)X
+1 f
+3996([BAY77])X
+555 1782(during)N
+786(descent\).)X
+1116(When)X
+1330(a)X
+1388(leaf)X
+1531(\(or)X
+1647(internal\))X
+1941(page)X
+2115(is)X
+2190(split,)X
+2369(a)X
+2427(write)X
+2614(lock)X
+2774(is)X
+2849(acquired)X
+3148(on)X
+3250(the)X
+3370(parent)X
+3593(before)X
+3821(the)X
+3941(lock)X
+4100(on)X
+4201(the)X
+555 1872(just-split)N
+855(page)X
+1028(is)X
+1102(released)X
+1387(\(locks)X
+1604(are)X
+3 f
+1724(coupled)X
+1 f
+2011(during)X
+2241(ascent\).)X
+2530(Write)X
+2734(locks)X
+2924(on)X
+3025(internal)X
+3291(pages)X
+3495(are)X
+3615(released)X
+3899(immediately)X
+555 1962(after)N
+723(the)X
+841(page)X
+1013(is)X
+1086(updated,)X
+1380(but)X
+1502(locks)X
+1691(on)X
+1791(leaf)X
+1932(pages)X
+2135(are)X
+2254(held)X
+2412(until)X
+2578(the)X
+2696(end)X
+2832(of)X
+2919(the)X
+3037(transaction.)X
+755 2085(Since)N
+964(locks)X
+1164(are)X
+1294(released)X
+1589(during)X
+1828(descent,)X
+2119(the)X
+2247(structure)X
+2558(of)X
+2655(the)X
+2783(tree)X
+2934(may)X
+3102(change)X
+3360(above)X
+3582(a)X
+3648(node)X
+3834(being)X
+4042(used)X
+4219(by)X
+555 2175(some)N
+752(process.)X
+1061(If)X
+1143(that)X
+1291(process)X
+1560(must)X
+1743(later)X
+1914(ascend)X
+2161(the)X
+2287(tree)X
+2435(because)X
+2717(of)X
+2811(a)X
+2874(page)X
+3053(split,)X
+3237(any)X
+3380(such)X
+3554(change)X
+3809(must)X
+3991(not)X
+4120(cause)X
+555 2265(confusion.)N
+938(We)X
+1077(use)X
+1211(the)X
+1336(technique)X
+1675(described)X
+2010(in)X
+2099([LEHM81])X
+2487(which)X
+2710(exploits)X
+2989(the)X
+3113(ordering)X
+3411(of)X
+3504(data)X
+3664(on)X
+3770(a)X
+3832(B-tree)X
+4059(page)X
+4237(to)X
+555 2355(guarantee)N
+888(that)X
+1028(no)X
+1128(process)X
+1389(ever)X
+1548(gets)X
+1697(lost)X
+1832(as)X
+1919(a)X
+1975(result)X
+2173(of)X
+2260(internal)X
+2525(page)X
+2697(updates)X
+2962(made)X
+3156(by)X
+3256(other)X
+3441(processes.)X
+755 2478(If)N
+836(a)X
+899(transaction)X
+1278(that)X
+1425(updates)X
+1697(a)X
+1760(B-tree)X
+1988(aborts,)X
+2231(the)X
+2356(user-visible)X
+2757(changes)X
+3043(to)X
+3131(the)X
+3255(tree)X
+3402(must)X
+3583(be)X
+3685(rolled)X
+3898(back.)X
+4116(How-)X
+555 2568(ever,)N
+735(changes)X
+1015(to)X
+1097(the)X
+1215(internal)X
+1480(nodes)X
+1687(of)X
+1774(the)X
+1892(tree)X
+2033(need)X
+2205(not)X
+2327(be)X
+2423(rolled)X
+2630(back,)X
+2822(since)X
+3007(these)X
+3192(pages)X
+3395(contain)X
+3651(no)X
+3751(user-visible)X
+4145(data.)X
+555 2658(When)N
+771(rolling)X
+1008(back)X
+1184(a)X
+1244(transaction,)X
+1640(we)X
+1758(roll)X
+1893(back)X
+2069(all)X
+2173(leaf)X
+2318(page)X
+2494(updates,)X
+2783(but)X
+2909(no)X
+3013(internal)X
+3281(insertions)X
+3615(or)X
+3705(page)X
+3880(splits.)X
+4111(In)X
+4201(the)X
+555 2748(worst)N
+759(case,)X
+944(this)X
+1085(will)X
+1235(leave)X
+1431(a)X
+1493(leaf)X
+1640(page)X
+1818(less)X
+1964(than)X
+2128(half)X
+2279(full.)X
+2456(This)X
+2624(may)X
+2788(cause)X
+2993(poor)X
+3166(space)X
+3371(utilization,)X
+3741(but)X
+3869(does)X
+4042(not)X
+4170(lose)X
+555 2838(user)N
+709(data.)X
+755 2961(Holding)N
+1038(locks)X
+1228(on)X
+1329(leaf)X
+1471(pages)X
+1675(until)X
+1842(transaction)X
+2215(commit)X
+2480(guarantees)X
+2845(that)X
+2986(no)X
+3087(other)X
+3273(process)X
+3535(can)X
+3668(insert)X
+3866(or)X
+3953(delete)X
+4165(data)X
+555 3051(that)N
+711(has)X
+854(been)X
+1042(touched)X
+1332(by)X
+1448(this)X
+1598(process.)X
+1914(Rolling)X
+2188(back)X
+2375(insertions)X
+2721(and)X
+2872(deletions)X
+3196(on)X
+3311(leaf)X
+3467(pages)X
+3685(guarantees)X
+4064(that)X
+4219(no)X
+555 3141(aborted)N
+819(updates)X
+1087(are)X
+1209(ever)X
+1371(visible)X
+1607(to)X
+1692(other)X
+1880(transactions.)X
+2326(Leaving)X
+2612(page)X
+2787(splits)X
+2978(intact)X
+3179(permits)X
+3442(us)X
+3536(to)X
+3621(release)X
+3867(internal)X
+4134(write)X
+555 3231(locks)N
+744(early.)X
+965(Thus)X
+1145(transaction)X
+1517(semantics)X
+1853(are)X
+1972(preserved,)X
+2325(and)X
+2461(locks)X
+2650(are)X
+2769(held)X
+2927(for)X
+3041(shorter)X
+3284(periods.)X
+755 3354(The)N
+901(extra)X
+1083(complexity)X
+1464(introduced)X
+1828(by)X
+1929(this)X
+2065(locking)X
+2326(protocol)X
+2614(appears)X
+2881(substantial,)X
+3264(but)X
+3387(it)X
+3452(is)X
+3525(important)X
+3856(for)X
+3970(multi-user)X
+555 3444(execution.)N
+950(The)X
+1118(bene\256ts)X
+1410(of)X
+1520(non-two-phase)X
+2040(locking)X
+2323(on)X
+2446(B-trees)X
+2721(are)X
+2863(well)X
+3044(established)X
+3443(in)X
+3548(the)X
+3689(database)X
+4009(literature)X
+555 3534([BAY77],)N
+899([LEHM81].)X
+1320(If)X
+1394(a)X
+1450(process)X
+1711(held)X
+1869(locks)X
+2058(until)X
+2224(it)X
+2288(committed,)X
+2670(then)X
+2828(a)X
+2884(long-running)X
+3322(update)X
+3556(could)X
+3754(lock)X
+3912(out)X
+4034(all)X
+4134(other)X
+555 3624(transactions)N
+967(by)X
+1076(preventing)X
+1448(any)X
+1593(other)X
+1787(process)X
+2057(from)X
+2241(locking)X
+2509(the)X
+2635(root)X
+2792(page)X
+2972(of)X
+3067(the)X
+3193(tree.)X
+3382(The)X
+3535(B-tree)X
+3764(locking)X
+4032(protocol)X
+555 3714(described)N
+884(above)X
+1096(guarantees)X
+1460(that)X
+1600(locks)X
+1789(on)X
+1889(internal)X
+2154(pages)X
+2357(are)X
+2476(held)X
+2634(for)X
+2748(extremely)X
+3089(short)X
+3269(periods,)X
+3545(thereby)X
+3806(increasing)X
+4156(con-)X
+555 3804(currency.)N
+3 f
+555 3990(3.1.3.)N
+775(Management)X
+1245(of)X
+1332(Shared)X
+1596(Data)X
+1 f
+755 4113(Database)N
+1075(systems)X
+1353(permit)X
+1587(many)X
+1790(users)X
+1980(to)X
+2067(examine)X
+2364(and)X
+2505(update)X
+2744(the)X
+2866(same)X
+3055(data)X
+3213(concurrently.)X
+3683(In)X
+3774(order)X
+3968(to)X
+4054(provide)X
+555 4203(this)N
+702(concurrent)X
+1078(access)X
+1316(and)X
+1464(enforce)X
+1738(the)X
+1868(write-ahead)X
+2280(logging)X
+2556(protocol)X
+2855(described)X
+3195(in)X
+3289(section)X
+3548(3.1.1,)X
+3759(we)X
+3884(use)X
+4022(a)X
+4089(shared)X
+555 4293(memory)N
+848(buffer)X
+1071(manager.)X
+1414(Not)X
+1559(only)X
+1726(does)X
+1898(this)X
+2038(provide)X
+2308(the)X
+2431(guarantees)X
+2800(we)X
+2919(require,)X
+3192(but)X
+3319(a)X
+3380(user-level)X
+3722(buffer)X
+3944(manager)X
+4246(is)X
+555 4383(frequently)N
+916(faster)X
+1126(than)X
+1295(using)X
+1498(the)X
+1626(\256le)X
+1758(system)X
+2010(buffer)X
+2237(cache.)X
+2491(Reads)X
+2717(or)X
+2814(writes)X
+3040(involving)X
+3376(the)X
+3504(\256le)X
+3636(system)X
+3888(buffer)X
+4115(cache)X
+555 4473(often)N
+746(require)X
+1000(copying)X
+1284(data)X
+1444(between)X
+1738(user)X
+1898(and)X
+2040(kernel)X
+2266(space)X
+2470(while)X
+2673(a)X
+2734(user-level)X
+3076(buffer)X
+3298(manager)X
+3600(can)X
+3737(return)X
+3954(pointers)X
+4237(to)X
+555 4563(data)N
+709(pages)X
+912(directly.)X
+1217(Additionally,)X
+1661(if)X
+1730(more)X
+1915(than)X
+2073(one)X
+2209(process)X
+2470(uses)X
+2628(the)X
+2746(same)X
+2931(page,)X
+3123(then)X
+3281(fewer)X
+3485(copies)X
+3710(may)X
+3868(be)X
+3964(required.)X
+3 f
+555 4749(3.2.)N
+715(Module)X
+997(Architecture)X
+1 f
+755 4872(The)N
+913(preceding)X
+1262(sections)X
+1552(described)X
+1892(modules)X
+2195(for)X
+2321(managing)X
+2669(the)X
+2799(transaction)X
+3183(log,)X
+3337(locks,)X
+3558(and)X
+3706(a)X
+3774(cache)X
+3990(of)X
+4089(shared)X
+555 4962(buffers.)N
+847(In)X
+938(addition,)X
+1244(we)X
+1362(need)X
+1538(to)X
+1624(provide)X
+1893(functionality)X
+2326(for)X
+2444(transaction)X
+2 f
+2819(begin)X
+1 f
+2997(,)X
+2 f
+3040(commit)X
+1 f
+3276(,)X
+3319(and)X
+2 f
+3458(abort)X
+1 f
+3654(processing,)X
+4040(necessi-)X
+555 5052(tating)N
+769(a)X
+837(transaction)X
+1221(manager.)X
+1570(In)X
+1669(order)X
+1871(to)X
+1965(arbitrate)X
+2265(concurrent)X
+2641(access)X
+2879(to)X
+2973(locks)X
+3173(and)X
+3320(buffers,)X
+3599(we)X
+3724(include)X
+3991(a)X
+4058(process)X
+555 5142(management)N
+995(module)X
+1264(which)X
+1489(manages)X
+1799(a)X
+1864(collection)X
+2209(of)X
+2305(semaphores)X
+2713(used)X
+2889(to)X
+2980(block)X
+3187(and)X
+3332(release)X
+3585(processes.)X
+3962(Finally,)X
+4237(in)X
+555 5232(order)N
+752(to)X
+841(provide)X
+1113(a)X
+1176(simple,)X
+1436(standard)X
+1735(interface)X
+2044(we)X
+2165(have)X
+2344(modi\256ed)X
+2655(the)X
+2780(database)X
+3084(access)X
+3317(routines)X
+3602(\()X
+3 f
+3629(db)X
+1 f
+3717(\(3\)\).)X
+3904(For)X
+4041(the)X
+4165(pur-)X
+555 5322(poses)N
+758(of)X
+850(this)X
+990(paper)X
+1194(we)X
+1313(call)X
+1453(the)X
+1575(modi\256ed)X
+1883(package)X
+2171(the)X
+3 f
+2293(Record)X
+2567(Manager)X
+1 f
+2879(.)X
+2943(Figure)X
+3176(one)X
+3316(shows)X
+3540(the)X
+3662(main)X
+3846(interfaces)X
+4183(and)X
+555 5412(architecture)N
+955(of)X
+1042(LIBTP.)X
+
+5 p
+%%Page: 5 5
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+11 s
+1851 1520(log_commit)N
+2764 2077(buf_unpin)N
+2764 1987(buf_get)N
+3633 1408(buf_unpin)N
+3633 1319(buf_pin)N
+3633 1230(buf_get)N
+3 f
+17 s
+1163 960(Txn)N
+1430(M)X
+1559(anager)X
+2582(Record)X
+3040(M)X
+3169(anager)X
+1 Dt
+2363 726 MXY
+0 355 Dl
+1426 0 Dl
+0 -355 Dl
+-1426 0 Dl
+3255 1616 MXY
+0 535 Dl
+534 0 Dl
+0 -535 Dl
+-534 0 Dl
+2185 MX
+0 535 Dl
+535 0 Dl
+0 -535 Dl
+-535 0 Dl
+1116 MX
+0 535 Dl
+534 0 Dl
+0 -535 Dl
+-534 0 Dl
+726 MY
+0 355 Dl
+891 0 Dl
+0 -355 Dl
+-891 0 Dl
+1 f
+11 s
+2207 1297(lock)N
+2564 1386(log)N
+865(unlock_all)X
+1851 1609(log_unroll)N
+1650 2508 MXY
+0 178 Dl
+1605 0 Dl
+0 -178 Dl
+-1605 0 Dl
+1294 1616 MXY
+19 -30 Dl
+-19 11 Dl
+-20 -11 Dl
+20 30 Dl
+0 -535 Dl
+2319 2508 MXY
+-22 -30 Dl
+4 23 Dl
+-18 14 Dl
+36 -7 Dl
+-936 -357 Dl
+3277 2455(sleep_on)N
+1405 1616 MXY
+36 4 Dl
+-18 -13 Dl
+1 -22 Dl
+-19 31 Dl
+1070 -535 Dl
+2631 2508 MXY
+36 6 Dl
+-18 -14 Dl
+3 -22 Dl
+-21 30 Dl
+891 -357 Dl
+1426 2455(sleep_on)N
+3255 1884 MXY
+-31 -20 Dl
+11 20 Dl
+-11 19 Dl
+31 -19 Dl
+-535 0 Dl
+1554 2366(wake)N
+3277(wake)X
+2185 1884 MXY
+-31 -20 Dl
+12 20 Dl
+-12 19 Dl
+31 -19 Dl
+-356 0 Dl
+0 -803 Dl
+3 f
+17 s
+1236 1851(Lock)N
+1118 2030(M)N
+1247(anager)X
+2339 1851(Log)N
+2187 2030(M)N
+2316(anager)X
+3333 1851(Buffer)N
+3257 2030(M)N
+3386(anager)X
+3522 1616 MXY
+20 -30 Dl
+-20 11 Dl
+-20 -11 Dl
+20 30 Dl
+0 -535 Dl
+1950 2654(Process)N
+2424(M)X
+2553(anager)X
+2542 1616 MXY
+19 -30 Dl
+-19 11 Dl
+-20 -11 Dl
+20 30 Dl
+0 -535 Dl
+1 f
+11 s
+2207 1364(unlock)N
+2452 2508 MXY
+20 -31 Dl
+-20 11 Dl
+-19 -11 Dl
+19 31 Dl
+0 -357 Dl
+2497 2322(sleep_on)N
+2497 2233(wake)N
+3 Dt
+-1 Ds
+3 f
+10 s
+1790 2830(Figure)N
+2037(1:)X
+2144(Library)X
+2435(module)X
+2708(interfaces.)X
+1 f
+10 f
+555 3010(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+3 f
+555 3286(3.2.1.)N
+775(The)X
+928(Log)X
+1081(Manager)X
+1 f
+755 3409(The)N
+3 f
+907(Log)X
+1067(Manager)X
+1 f
+1406(enforces)X
+1706(the)X
+1831(write-ahead)X
+2238(logging)X
+2509(protocol.)X
+2843(Its)X
+2949(primitive)X
+3268(operations)X
+3628(are)X
+2 f
+3753(log)X
+1 f
+3855(,)X
+2 f
+3901(log_commit)X
+1 f
+4279(,)X
+2 f
+555 3499(log_read)N
+1 f
+844(,)X
+2 f
+889(log_roll)X
+1 f
+1171(and)X
+2 f
+1312(log_unroll)X
+1 f
+1649(.)X
+1714(The)X
+2 f
+1864(log)X
+1 f
+1991(call)X
+2132(performs)X
+2447(a)X
+2508(buffered)X
+2806(write)X
+2996(of)X
+3088(the)X
+3211(speci\256ed)X
+3520(log)X
+3646(record)X
+3876(and)X
+4016(returns)X
+4263(a)X
+555 3589(unique)N
+809(log)X
+947(sequence)X
+1278(number)X
+1559(\(LSN\).)X
+1840(This)X
+2017(LSN)X
+2203(may)X
+2376(then)X
+2549(be)X
+2660(used)X
+2842(to)X
+2939(retrieve)X
+3220(a)X
+3291(record)X
+3532(from)X
+3723(the)X
+3856(log)X
+3993(using)X
+4201(the)X
+2 f
+555 3679(log_read)N
+1 f
+865(call.)X
+1042(The)X
+2 f
+1188(log)X
+1 f
+1311(interface)X
+1614(knows)X
+1844(very)X
+2008(little)X
+2175(about)X
+2374(the)X
+2493(internal)X
+2759(format)X
+2993(of)X
+3080(the)X
+3198(log)X
+3320(records)X
+3577(it)X
+3641(receives.)X
+3965(Rather,)X
+4219(all)X
+555 3769(log)N
+681(records)X
+942(are)X
+1065 0.4028(referenced)AX
+1430(by)X
+1534(a)X
+1594(header)X
+1833(structure,)X
+2158(a)X
+2218(log)X
+2344(record)X
+2574(type,)X
+2756(and)X
+2896(a)X
+2956(character)X
+3276(buffer)X
+3497(containing)X
+3859(the)X
+3981(data)X
+4138(to)X
+4223(be)X
+555 3859(logged.)N
+834(The)X
+980(log)X
+1103(record)X
+1330(type)X
+1489(is)X
+1563(used)X
+1731(to)X
+1814(call)X
+1951(the)X
+2070(appropriate)X
+2457(redo)X
+2621(and)X
+2758(undo)X
+2939(routines)X
+3217(during)X
+2 f
+3446(abort)X
+1 f
+3639(and)X
+2 f
+3775(commit)X
+1 f
+4031(process-)X
+555 3949(ing.)N
+721(While)X
+941(we)X
+1059(have)X
+1235(used)X
+1406(the)X
+3 f
+1528(Log)X
+1684(Manager)X
+1 f
+2019(to)X
+2104(provide)X
+2372(before)X
+2601(and)X
+2740(after)X
+2911(image)X
+3130(logging,)X
+3417(it)X
+3484(may)X
+3645(also)X
+3797(be)X
+3896(used)X
+4066(for)X
+4183(any)X
+555 4039(of)N
+642(the)X
+760(logging)X
+1024(algorithms)X
+1386(discussed.)X
+755 4162(The)N
+2 f
+905(log_commit)X
+1 f
+1308(operation)X
+1636(behaves)X
+1920(exactly)X
+2177(like)X
+2322(the)X
+2 f
+2445(log)X
+1 f
+2572(operation)X
+2900(but)X
+3026(guarantees)X
+3394(that)X
+3538(the)X
+3660(log)X
+3786(has)X
+3917(been)X
+4093(forced)X
+555 4252(to)N
+643(disk)X
+802(before)X
+1034(returning.)X
+1394(A)X
+1478(discussion)X
+1837(of)X
+1930(our)X
+2063(commit)X
+2333(strategy)X
+2613(appears)X
+2884(in)X
+2971(the)X
+3094(implementation)X
+3621(section)X
+3873(\(section)X
+4152(4.2\).)X
+2 f
+555 4342(Log_unroll)N
+1 f
+935(reads)X
+1126(log)X
+1249(records)X
+1507(from)X
+1684(the)X
+1803(log,)X
+1946(following)X
+2278(backward)X
+2611(transaction)X
+2983(pointers)X
+3261(and)X
+3397(calling)X
+3635(the)X
+3753(appropriate)X
+4139(undo)X
+555 4432(routines)N
+839(to)X
+927(implement)X
+1295(transaction)X
+1673(abort.)X
+1904(In)X
+1997(a)X
+2059(similar)X
+2307(manner,)X
+2 f
+2594(log_roll)X
+1 f
+2877(reads)X
+3073(log)X
+3201(records)X
+3464(sequentially)X
+3877(forward,)X
+4178(cal-)X
+555 4522(ling)N
+699(the)X
+817(appropriate)X
+1203(redo)X
+1366(routines)X
+1644(to)X
+1726(recover)X
+1988(committed)X
+2350(transactions)X
+2753(after)X
+2921(a)X
+2977(system)X
+3219(crash.)X
+3 f
+555 4708(3.2.2.)N
+775(The)X
+928(Buffer)X
+1171(Manager)X
+1 f
+755 4831(The)N
+3 f
+912(Buffer)X
+1167(Manager)X
+1 f
+1511(uses)X
+1681(a)X
+1749(pool)X
+1923(of)X
+2022(shared)X
+2264(memory)X
+2563(to)X
+2657(provide)X
+2934(a)X
+3002(least-recently-used)X
+3641(\(LRU\))X
+3886(block)X
+4095(cache.)X
+555 4921(Although)N
+886(the)X
+1013(current)X
+1270(library)X
+1513(provides)X
+1818(an)X
+1923(LRU)X
+2112(cache,)X
+2345(it)X
+2418(would)X
+2647(be)X
+2752(simple)X
+2994(to)X
+3085(add)X
+3229(alternate)X
+3534(replacement)X
+3955(policies)X
+4232(as)X
+555 5011(suggested)N
+903(by)X
+1015([CHOU85])X
+1408(or)X
+1507(to)X
+1601(provide)X
+1878(multiple)X
+2176(buffer)X
+2405(pools)X
+2610(with)X
+2784(different)X
+3092(policies.)X
+3412(Transactions)X
+3853(request)X
+4116(pages)X
+555 5101(from)N
+736(the)X
+859(buffer)X
+1081(manager)X
+1383(and)X
+1524(keep)X
+1701(them)X
+3 f
+1886(pinned)X
+1 f
+2145(to)X
+2232(ensure)X
+2466(that)X
+2610(they)X
+2772(are)X
+2895(not)X
+3021(written)X
+3272(to)X
+3358(disk)X
+3515(while)X
+3717(they)X
+3879(are)X
+4002(in)X
+4088(a)X
+4148(logi-)X
+555 5191(cally)N
+732(inconsistent)X
+1135(state.)X
+1343(When)X
+1556(page)X
+1729(replacement)X
+2143(is)X
+2217(necessary,)X
+2571(the)X
+3 f
+2689(Buffer)X
+2932(Manager)X
+1 f
+3264(\256nds)X
+3439(an)X
+3535(unpinned)X
+3853(page)X
+4025(and)X
+4161(then)X
+555 5281(checks)N
+794(with)X
+956(the)X
+3 f
+1074(Log)X
+1227(Manager)X
+1 f
+1559(to)X
+1641(ensure)X
+1871(that)X
+2011(the)X
+2129(write-ahead)X
+2529(protocol)X
+2816(is)X
+2889(enforced.)X
+3 f
+555 5467(3.2.3.)N
+775(The)X
+928(Lock)X
+1121(Manager)X
+1 f
+755 5590(The)N
+3 f
+901(Lock)X
+1095(Manager)X
+1 f
+1428(supports)X
+1720(general)X
+1978(purpose)X
+2253(locking)X
+2514(\(single)X
+2753(writer,)X
+2986(multiple)X
+3273(readers\))X
+3553(which)X
+3769(is)X
+3842(currently)X
+4152(used)X
+555 5680(to)N
+638(provide)X
+904(two-phase)X
+1254(locking)X
+1514(and)X
+1650(high)X
+1812(concurrency)X
+2230(B-tree)X
+2451(locking.)X
+2751(However,)X
+3086(the)X
+3204(general)X
+3461(purpose)X
+3735(nature)X
+3956(of)X
+4043(the)X
+4161(lock)X
+
+6 p
+%%Page: 6 6
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+555 630(manager)N
+857(provides)X
+1158(the)X
+1281(ability)X
+1510(to)X
+1597(support)X
+1862(a)X
+1923(variety)X
+2171(of)X
+2263(locking)X
+2528(protocols.)X
+2890(Currently,)X
+3241(all)X
+3345(locks)X
+3538(are)X
+3661(issued)X
+3885(at)X
+3967(the)X
+4089(granu-)X
+555 720(larity)N
+747(of)X
+837(a)X
+896(page)X
+1071(\(the)X
+1219(size)X
+1367(of)X
+1457(a)X
+1516(buffer)X
+1736(in)X
+1821(the)X
+1942(buffer)X
+2161(pool\))X
+2352(which)X
+2570(is)X
+2645(identi\256ed)X
+2969(by)X
+3071(two)X
+3213(4-byte)X
+3440(integers)X
+3716(\(a)X
+3801(\256le)X
+3925(id)X
+4009(and)X
+4147(page)X
+555 810(number\).)N
+898(This)X
+1071(provides)X
+1378(the)X
+1507(necessary)X
+1851(information)X
+2259(to)X
+2351(extend)X
+2595(the)X
+3 f
+2723(Lock)X
+2926(Manager)X
+1 f
+3268(to)X
+3360(perform)X
+3649(hierarchical)X
+4059(locking)X
+555 900([GRAY76].)N
+982(The)X
+1133(current)X
+1387(implementation)X
+1915(does)X
+2088(not)X
+2216(support)X
+2482(locks)X
+2677(at)X
+2760(other)X
+2950(granularities)X
+3376(and)X
+3517(does)X
+3689(not)X
+3816(promote)X
+4108(locks;)X
+555 990(these)N
+740(are)X
+859(obvious)X
+1132(future)X
+1344(additions)X
+1657(to)X
+1739(the)X
+1857(system.)X
+755 1113(If)N
+831(an)X
+929(incoming)X
+1253(lock)X
+1413(request)X
+1667(cannot)X
+1903(be)X
+2001(granted,)X
+2284(the)X
+2404(requesting)X
+2760(process)X
+3023(is)X
+3098(queued)X
+3352(for)X
+3467(the)X
+3586(lock)X
+3745(and)X
+3882(descheduled.)X
+555 1203(When)N
+769(a)X
+827(lock)X
+987(is)X
+1062(released,)X
+1368(the)X
+1488(wait)X
+1647(queue)X
+1860(is)X
+1934(traversed)X
+2250(and)X
+2387(any)X
+2524(newly)X
+2741(compatible)X
+3118(locks)X
+3308(are)X
+3428(granted.)X
+3730(Locks)X
+3947(are)X
+4067(located)X
+555 1293(via)N
+680(a)X
+743(\256le)X
+872(and)X
+1015(page)X
+1194(hash)X
+1368(table)X
+1551(and)X
+1694(are)X
+1820(chained)X
+2097(both)X
+2266(by)X
+2373(object)X
+2595(and)X
+2737(by)X
+2843(transaction,)X
+3241(facilitating)X
+3614(rapid)X
+3805(traversal)X
+4108(of)X
+4201(the)X
+555 1383(lock)N
+713(table)X
+889(during)X
+1118(transaction)X
+1490(commit)X
+1754(and)X
+1890(abort.)X
+755 1506(The)N
+907(primary)X
+1188(interfaces)X
+1528(to)X
+1617(the)X
+1742(lock)X
+1907(manager)X
+2211(are)X
+2 f
+2337(lock)X
+1 f
+2471(,)X
+2 f
+2518(unlock)X
+1 f
+2732(,)X
+2779(and)X
+2 f
+2922(lock_unlock_all)X
+1 f
+3434(.)X
+2 f
+3500(Lock)X
+1 f
+3682(obtains)X
+3939(a)X
+4001(new)X
+4161(lock)X
+555 1596(for)N
+680(a)X
+747(speci\256c)X
+1023(object.)X
+1290(There)X
+1509(are)X
+1638(also)X
+1797(two)X
+1947(variants)X
+2231(of)X
+2328(the)X
+2 f
+2456(lock)X
+1 f
+2620(request,)X
+2 f
+2902(lock_upgrade)X
+1 f
+3373(and)X
+2 f
+3519(lock_downgrade)X
+1 f
+4053(,)X
+4103(which)X
+555 1686(allow)N
+755(the)X
+875(caller)X
+1076(to)X
+1160(atomically)X
+1519(trade)X
+1701(a)X
+1758(lock)X
+1917(of)X
+2005(one)X
+2142(type)X
+2301(for)X
+2416(a)X
+2473(lock)X
+2632(of)X
+2720(another.)X
+2 f
+3022(Unlock)X
+1 f
+3275(releases)X
+3551(a)X
+3608(speci\256c)X
+3874(mode)X
+4073(of)X
+4161(lock)X
+555 1776(on)N
+655(a)X
+711(speci\256c)X
+976(object.)X
+2 f
+1232(Lock_unlock_all)X
+1 f
+1786(releases)X
+2061(all)X
+2161(the)X
+2279(locks)X
+2468(associated)X
+2818(with)X
+2980(a)X
+3036(speci\256c)X
+3301(transaction.)X
+3 f
+555 1962(3.2.4.)N
+775(The)X
+928(Process)X
+1207(Manager)X
+1 f
+755 2085(The)N
+3 f
+900(Process)X
+1179(Manager)X
+1 f
+1511(acts)X
+1656(as)X
+1743(a)X
+1799(user-level)X
+2136(scheduler)X
+2464(to)X
+2546(make)X
+2740(processes)X
+3068(wait)X
+3226(on)X
+3326(unavailable)X
+3716(locks)X
+3905(and)X
+4041(pending)X
+555 2175(buffer)N
+778(cache)X
+988(I/O.)X
+1161(For)X
+1297(each)X
+1470(process,)X
+1756(a)X
+1817(semaphore)X
+2190(is)X
+2268(maintained)X
+2649(upon)X
+2834(which)X
+3055(that)X
+3200(process)X
+3466(waits)X
+3660(when)X
+3859(it)X
+3928(needs)X
+4136(to)X
+4223(be)X
+555 2265(descheduled.)N
+1014(When)X
+1228(a)X
+1286(process)X
+1549(needs)X
+1754(to)X
+1838(be)X
+1936(run,)X
+2084(its)X
+2180(semaphore)X
+2549(is)X
+2623(cleared,)X
+2897(and)X
+3034(the)X
+3153(operating)X
+3477(system)X
+3720(reschedules)X
+4116(it.)X
+4201(No)X
+555 2355(sophisticated)N
+1002(scheduling)X
+1378(algorithm)X
+1718(is)X
+1799(applied;)X
+2085(if)X
+2162(the)X
+2288(lock)X
+2454(for)X
+2576(which)X
+2800(a)X
+2864(process)X
+3133(was)X
+3286(waiting)X
+3554(becomes)X
+3863(available,)X
+4201(the)X
+555 2445(process)N
+824(is)X
+905(made)X
+1107(runnable.)X
+1456(It)X
+1533(would)X
+1761(have)X
+1941(been)X
+2121(possible)X
+2411(to)X
+2501(change)X
+2757(the)X
+2883(kernel's)X
+3170(process)X
+3439(scheduler)X
+3775(to)X
+3865(interact)X
+4134(more)X
+555 2535(ef\256ciently)N
+900(with)X
+1062(the)X
+1180(lock)X
+1338(manager,)X
+1655(but)X
+1777(doing)X
+1979(so)X
+2070(would)X
+2290(have)X
+2462(compromised)X
+2918(our)X
+3045(commitment)X
+3469(to)X
+3551(a)X
+3607(user-level)X
+3944(package.)X
+3 f
+555 2721(3.2.5.)N
+775(The)X
+928(Transaction)X
+1361(Manager)X
+1 f
+755 2844(The)N
+3 f
+901(Transaction)X
+1335(Manager)X
+1 f
+1668(provides)X
+1965(the)X
+2084(standard)X
+2377(interface)X
+2680(of)X
+2 f
+2768(txn_begin)X
+1 f
+3084(,)X
+2 f
+3125(txn_commit)X
+1 f
+3499(,)X
+3540(and)X
+2 f
+3676(txn_abort)X
+1 f
+3987(.)X
+4047(It)X
+4116(keeps)X
+555 2934(track)N
+742(of)X
+835(all)X
+941(active)X
+1159(transactions,)X
+1588(assigns)X
+1845(unique)X
+2089(transaction)X
+2467(identi\256ers,)X
+2833(and)X
+2974(directs)X
+3213(the)X
+3336(abort)X
+3526(and)X
+3667(commit)X
+3936(processing.)X
+555 3024(When)N
+772(a)X
+2 f
+833(txn_begin)X
+1 f
+1174(is)X
+1252(issued,)X
+1497(the)X
+3 f
+1620(Transaction)X
+2058(Manager)X
+1 f
+2395(assigns)X
+2651(the)X
+2773(next)X
+2935(available)X
+3249(transaction)X
+3625(identi\256er,)X
+3958(allocates)X
+4263(a)X
+555 3114(per-process)N
+948(transaction)X
+1322(structure)X
+1625(in)X
+1709(shared)X
+1941(memory,)X
+2249(increments)X
+2622(the)X
+2741(count)X
+2940(of)X
+3028(active)X
+3241(transactions,)X
+3665(and)X
+3802(returns)X
+4046(the)X
+4165(new)X
+555 3204(transaction)N
+937(identi\256er)X
+1256(to)X
+1348(the)X
+1476(calling)X
+1724(process.)X
+2034(The)X
+2188(in-memory)X
+2573(transaction)X
+2954(structure)X
+3264(contains)X
+3560(a)X
+3625(pointer)X
+3881(into)X
+4034(the)X
+4161(lock)X
+555 3294(table)N
+734(for)X
+851(locks)X
+1043(held)X
+1204(by)X
+1307(this)X
+1445(transaction,)X
+1840(the)X
+1961(last)X
+2095(log)X
+2220(sequence)X
+2538(number,)X
+2826(a)X
+2885(transaction)X
+3260(state)X
+3430(\()X
+2 f
+3457(idle)X
+1 f
+(,)S
+2 f
+3620(running)X
+1 f
+3873(,)X
+2 f
+3915(aborting)X
+1 f
+4190(,)X
+4232(or)X
+2 f
+555 3384(committing\))N
+1 f
+942(,)X
+982(an)X
+1078(error)X
+1255(code,)X
+1447(and)X
+1583(a)X
+1639(semaphore)X
+2007(identi\256er.)X
+755 3507(At)N
+859(commit,)X
+1147(the)X
+3 f
+1269(Transaction)X
+1706(Manager)X
+1 f
+2042(calls)X
+2 f
+2213(log_commit)X
+1 f
+2615(to)X
+2700(record)X
+2929(the)X
+3050(end)X
+3189(of)X
+3279(transaction)X
+3654(and)X
+3793(to)X
+3878(\257ush)X
+4056(the)X
+4177(log.)X
+555 3597(Then)N
+743(it)X
+810(directs)X
+1047(the)X
+3 f
+1168(Lock)X
+1364(Manager)X
+1 f
+1699(to)X
+1784(release)X
+2031(all)X
+2134(locks)X
+2325(associated)X
+2677(with)X
+2841(the)X
+2961(given)X
+3161(transaction.)X
+3575(If)X
+3651(a)X
+3709(transaction)X
+4083(aborts,)X
+555 3687(the)N
+3 f
+680(Transaction)X
+1120(Manager)X
+1 f
+1459(calls)X
+1633(on)X
+2 f
+1739(log_unroll)X
+1 f
+2102(to)X
+2190(read)X
+2355(the)X
+2479(transaction's)X
+2915(log)X
+3043(records)X
+3306(and)X
+3448(undo)X
+3634(any)X
+3776(modi\256cations)X
+4237(to)X
+555 3777(the)N
+673(database.)X
+1010(As)X
+1119(in)X
+1201(the)X
+1319(commit)X
+1583(case,)X
+1762(it)X
+1826(then)X
+1984(calls)X
+2 f
+2151(lock_unlock_all)X
+1 f
+2683(to)X
+2765(release)X
+3009(the)X
+3127(transaction's)X
+3557(locks.)X
+3 f
+555 3963(3.2.6.)N
+775(The)X
+928(Record)X
+1198(Manager)X
+1 f
+755 4086(The)N
+3 f
+919(Record)X
+1208(Manager)X
+1 f
+1559(supports)X
+1869(the)X
+2006(abstraction)X
+2397(of)X
+2503(reading)X
+2783(and)X
+2938(writing)X
+3208(records)X
+3484(to)X
+3585(a)X
+3660(database.)X
+3996(We)X
+4147(have)X
+555 4176(modi\256ed)N
+861(the)X
+981(the)X
+1101(database)X
+1399(access)X
+1626(routines)X
+3 f
+1905(db)X
+1 f
+1993(\(3\))X
+2108([BSD91])X
+2418(to)X
+2501(call)X
+2638(the)X
+2757(log,)X
+2900(lock,)X
+3079(and)X
+3216(buffer)X
+3434(managers.)X
+3803(In)X
+3891(order)X
+4082(to)X
+4165(pro-)X
+555 4266(vide)N
+718(functionality)X
+1152(to)X
+1239(perform)X
+1523(undo)X
+1708(and)X
+1849(redo,)X
+2037(the)X
+3 f
+2160(Record)X
+2434(Manager)X
+1 f
+2770(de\256nes)X
+3021(a)X
+3081(collection)X
+3421(of)X
+3512(log)X
+3638(record)X
+3868(types)X
+4061(and)X
+4201(the)X
+555 4356(associated)N
+920(undo)X
+1115(and)X
+1266(redo)X
+1444(routines.)X
+1777(The)X
+3 f
+1937(Log)X
+2105(Manager)X
+1 f
+2452(performs)X
+2777(a)X
+2848(table)X
+3039(lookup)X
+3296(on)X
+3411(the)X
+3543(record)X
+3783(type)X
+3955(to)X
+4051(call)X
+4201(the)X
+555 4446(appropriate)N
+951(routines.)X
+1299(For)X
+1440(example,)X
+1762(the)X
+1890(B-tree)X
+2121(access)X
+2356(method)X
+2625(requires)X
+2913(two)X
+3062(log)X
+3193(record)X
+3428(types:)X
+3648(insert)X
+3855(and)X
+4000(delete.)X
+4241(A)X
+555 4536(replace)N
+808(operation)X
+1131(is)X
+1204(implemented)X
+1642(as)X
+1729(a)X
+1785(delete)X
+1997(followed)X
+2302(by)X
+2402(an)X
+2498(insert)X
+2696(and)X
+2832(is)X
+2905(logged)X
+3143(accordingly.)X
+3 f
+555 4722(3.3.)N
+715(Application)X
+1134(Architectures)X
+1 f
+755 4845(The)N
+907(structure)X
+1215(of)X
+1309(LIBTP)X
+1558(allows)X
+1794(application)X
+2177(designers)X
+2507(to)X
+2596(trade)X
+2784(off)X
+2905(performance)X
+3339(and)X
+3481(protection.)X
+3872(Since)X
+4076(a)X
+4138(large)X
+555 4935(portion)N
+810(of)X
+901(LIBTP's)X
+1205(functionality)X
+1638(is)X
+1715(provided)X
+2024(by)X
+2128(managing)X
+2468(structures)X
+2804(in)X
+2889(shared)X
+3122(memory,)X
+3432(its)X
+3530(structures)X
+3865(are)X
+3987(subject)X
+4237(to)X
+555 5025(corruption)N
+926(by)X
+1043(applications)X
+1467(when)X
+1678(the)X
+1813(library)X
+2064(is)X
+2154(linked)X
+2391(directly)X
+2673(with)X
+2852(the)X
+2987(application.)X
+3420(For)X
+3568(this)X
+3720(reason,)X
+3987(LIBTP)X
+4246(is)X
+555 5115(designed)N
+864(to)X
+950(allow)X
+1152(compilation)X
+1558(into)X
+1706(a)X
+1766(separate)X
+2053(server)X
+2273(process)X
+2537(which)X
+2756(may)X
+2917(be)X
+3016(accessed)X
+3321(via)X
+3442(a)X
+3501(socket)X
+3729(interface.)X
+4094(In)X
+4184(this)X
+555 5205(way)N
+712(LIBTP's)X
+1015(data)X
+1172(structures)X
+1507(are)X
+1629(protected)X
+1951(from)X
+2130(application)X
+2509(code,)X
+2704(but)X
+2829(communication)X
+3349(overhead)X
+3666(is)X
+3741(increased.)X
+4107(When)X
+555 5295(applications)N
+975(are)X
+1107(trusted,)X
+1377(LIBTP)X
+1631(may)X
+1801(be)X
+1909(compiled)X
+2239(directly)X
+2516(into)X
+2672(the)X
+2802(application)X
+3190(providing)X
+3533(improved)X
+3872(performance.)X
+555 5385(Figures)N
+815(two)X
+955(and)X
+1091(three)X
+1272(show)X
+1461(the)X
+1579(two)X
+1719(alternate)X
+2016(application)X
+2392(architectures.)X
+755 5508(There)N
+964(are)X
+1084(potentially)X
+1447(two)X
+1588(modes)X
+1818(in)X
+1901(which)X
+2118(one)X
+2255(might)X
+2462(use)X
+2590(LIBTP)X
+2833(in)X
+2916(a)X
+2972(server)X
+3189(based)X
+3392(architecture.)X
+3832(In)X
+3919(the)X
+4037(\256rst,)X
+4201(the)X
+555 5598(server)N
+778(would)X
+1004(provide)X
+1275(the)X
+1399(capability)X
+1741(to)X
+1829(respond)X
+2109(to)X
+2197(requests)X
+2486(to)X
+2574(each)X
+2747(of)X
+2839(the)X
+2962(low)X
+3107(level)X
+3288(modules)X
+3584(\(lock,)X
+3794(log,)X
+3941(buffer,)X
+4183(and)X
+555 5688(transaction)N
+944(managers\).)X
+1356(Unfortunately,)X
+1863(the)X
+1998(performance)X
+2442(of)X
+2546(such)X
+2730(a)X
+2803(system)X
+3062(is)X
+3152(likely)X
+3371(to)X
+3470(be)X
+3583(blindingly)X
+3947(slow)X
+4134(since)X
+
+7 p
+%%Page: 7 7
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+1 Dt
+1864 1125 MXY
+15 -26 Dl
+-15 10 Dl
+-14 -10 Dl
+14 26 Dl
+0 -266 Dl
+1315 1125 MXY
+15 -26 Dl
+-15 10 Dl
+-14 -10 Dl
+14 26 Dl
+0 -266 Dl
+3 Dt
+1133 1125 MXY
+0 798 Dl
+931 0 Dl
+0 -798 Dl
+-931 0 Dl
+1 Dt
+1266 1257 MXY
+0 133 Dl
+665 0 Dl
+0 -133 Dl
+-665 0 Dl
+3 f
+8 s
+1513 1351(driver)N
+1502 1617(LIBTP)N
+1266 1390 MXY
+0 400 Dl
+665 0 Dl
+0 -400 Dl
+-665 0 Dl
+3 Dt
+1133 726 MXY
+0 133 Dl
+931 0 Dl
+0 -133 Dl
+-931 0 Dl
+1 f
+1029 1098(txn_abort)N
+964 1015(txn_commit)N
+1018 932(txn_begin)N
+1910 1015(db_ops)N
+3 f
+1308 820(Application)N
+1645(Program)X
+1398 1218(Server)N
+1594(Process)X
+1 f
+1390 986(socket)N
+1569(interface)X
+1 Dt
+1848 967 MXY
+-23 -14 Dl
+8 14 Dl
+-8 15 Dl
+23 -15 Dl
+-50 0 Dl
+1324 MX
+23 15 Dl
+-9 -15 Dl
+9 -14 Dl
+-23 14 Dl
+50 0 Dl
+3 Dt
+2862 859 MXY
+0 1064 Dl
+932 0 Dl
+0 -1064 Dl
+-932 0 Dl
+1 Dt
+3178 1390 MXY
+24 -12 Dl
+-17 0 Dl
+-8 -15 Dl
+1 27 Dl
+150 -265 Dl
+3494 1390 MXY
+0 -27 Dl
+-8 15 Dl
+-16 1 Dl
+24 11 Dl
+-166 -265 Dl
+3 f
+3232 1617(LIBTP)N
+2995 1390 MXY
+0 400 Dl
+666 0 Dl
+0 -400 Dl
+-666 0 Dl
+992 MY
+0 133 Dl
+666 0 Dl
+0 -133 Dl
+-666 0 Dl
+3168 1086(Application)N
+1 f
+2939 1201(txn_begin)N
+2885 1284(txn_commit)N
+2950 1368(txn_abort)N
+3465 1284(db_ops)N
+3 f
+3155 766(Single)N
+3339(Process)X
+3 Dt
+-1 Ds
+811 2100(Figure)N
+1023(2:)X
+1107(Server)X
+1318(Architecture.)X
+1 f
+1727(In)X
+1811(this)X
+1934(con\256guration,)X
+811 2190(the)N
+916(library)X
+1113(is)X
+1183(loaded)X
+1380(into)X
+1507(a)X
+1562(server)X
+1744(process)X
+1962(which)X
+2145(is)X
+2214(ac-)X
+811 2280(cessed)N
+993(via)X
+1087(a)X
+1131(socket)X
+1310(interface.)X
+3 f
+2563 2100(Figure)N
+2803(3:)X
+2914(Single)X
+3140(Process)X
+3403(Architecture.)X
+1 f
+3839(In)X
+3950(this)X
+2563 2190(con\256guration,)N
+2948(the)X
+3053(library)X
+3250(routines)X
+3483(are)X
+3587(loaded)X
+3784(as)X
+3864(part)X
+3990(of)X
+2563 2280(the)N
+2657(application)X
+2957(and)X
+3065(accessed)X
+3303(via)X
+3397(a)X
+3441(subroutine)X
+3727(interface.)X
+10 s
+10 f
+555 2403(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+1 f
+555 2679(modifying)N
+909(a)X
+966(piece)X
+1157(of)X
+1245(data)X
+1400(would)X
+1621(require)X
+1870(three)X
+2051(or)X
+2138(possibly)X
+2424(four)X
+2578(separate)X
+2862(communications:)X
+3433(one)X
+3569(to)X
+3651(lock)X
+3809(the)X
+3927(data,)X
+4101(one)X
+4237(to)X
+555 2769(obtain)N
+781(the)X
+905(data,)X
+1085(one)X
+1227(to)X
+1315(log)X
+1443(the)X
+1567(modi\256cation,)X
+2017(and)X
+2159(possibly)X
+2451(one)X
+2593(to)X
+2681(transmit)X
+2969(the)X
+3093(modi\256ed)X
+3403(data.)X
+3583(Figure)X
+3817(four)X
+3976(shows)X
+4201(the)X
+555 2859(relative)N
+826(performance)X
+1263(for)X
+1387(retrieving)X
+1728(a)X
+1793(single)X
+2013(record)X
+2248(using)X
+2450(the)X
+2577(record)X
+2812(level)X
+2997(call)X
+3142(versus)X
+3376(using)X
+3578(the)X
+3705(lower)X
+3917(level)X
+4102(buffer)X
+555 2949(management)N
+987(and)X
+1125(locking)X
+1387(calls.)X
+1616(The)X
+1763(2:1)X
+1887(ratio)X
+2056(observed)X
+2367(in)X
+2450(the)X
+2569(single)X
+2781(process)X
+3043(case)X
+3203(re\257ects)X
+3456(the)X
+3575(additional)X
+3916(overhead)X
+4232(of)X
+555 3039(parsing)N
+819(eight)X
+1006(commands)X
+1380(rather)X
+1595(than)X
+1760(one)X
+1903(while)X
+2108(the)X
+2233(3:1)X
+2362(ratio)X
+2536(observed)X
+2853(in)X
+2942(the)X
+3067(client/server)X
+3491(architecture)X
+3898(re\257ects)X
+4157(both)X
+555 3129(the)N
+679(parsing)X
+941(and)X
+1083(the)X
+1207(communication)X
+1731(overheard.)X
+2118(Although)X
+2445(there)X
+2631(may)X
+2794(be)X
+2895(applications)X
+3307(which)X
+3528(could)X
+3731(tolerate)X
+3997(such)X
+4169(per-)X
+555 3219(formance,)N
+904(it)X
+973(seems)X
+1194(far)X
+1309(more)X
+1499(feasible)X
+1774(to)X
+1861(support)X
+2126(a)X
+2187(higher)X
+2417(level)X
+2597(interface,)X
+2923(such)X
+3094(as)X
+3185(that)X
+3329(provided)X
+3638(by)X
+3742(a)X
+3802(query)X
+4009(language)X
+555 3309(\()N
+2 f
+582(e.g.)X
+1 f
+718(SQL)X
+889([SQL86]\).)X
+755 3432(Although)N
+1081(LIBTP)X
+1327(does)X
+1498(not)X
+1624(have)X
+1800(an)X
+1900(SQL)X
+2075(parser,)X
+2316(we)X
+2433(have)X
+2608(built)X
+2777(a)X
+2836(server)X
+3056(application)X
+3435(using)X
+3631(the)X
+3752(toolkit)X
+3983(command)X
+555 3522(language)N
+882(\(TCL\))X
+1124([OUST90].)X
+1544(The)X
+1706(server)X
+1940(supports)X
+2248(a)X
+2321(command)X
+2674(line)X
+2831(interface)X
+3150(similar)X
+3409(to)X
+3508(the)X
+3643(subroutine)X
+4017(interface)X
+555 3612(de\256ned)N
+811(in)X
+3 f
+893(db)X
+1 f
+981(\(3\).)X
+1135(Since)X
+1333(it)X
+1397(is)X
+1470(based)X
+1673(on)X
+1773(TCL,)X
+1964(it)X
+2028(provides)X
+2324(control)X
+2571(structures)X
+2903(as)X
+2990(well.)X
+3 f
+555 3798(4.)N
+655(Implementation)X
+1 f
+3 f
+555 3984(4.1.)N
+715(Locking)X
+1014(and)X
+1162(Deadlock)X
+1502(Detection)X
+1 f
+755 4107(LIBTP)N
+1007(uses)X
+1175(two-phase)X
+1535(locking)X
+1805(for)X
+1929(user)X
+2093(data.)X
+2297(Strictly)X
+2562(speaking,)X
+2897(the)X
+3024(two)X
+3173(phases)X
+3416(in)X
+3507(two-phase)X
+3866(locking)X
+4135(are)X
+4263(a)X
+3 f
+555 4197(grow)N
+1 f
+756(phase,)X
+986(during)X
+1221(which)X
+1443(locks)X
+1638(are)X
+1763(acquired,)X
+2086(and)X
+2228(a)X
+3 f
+2290(shrink)X
+1 f
+2537(phase,)X
+2766(during)X
+3001(which)X
+3223(locks)X
+3418(are)X
+3543(released.)X
+3873(No)X
+3997(lock)X
+4161(may)X
+555 4287(ever)N
+720(be)X
+822(acquired)X
+1124(during)X
+1358(the)X
+1481(shrink)X
+1706(phase.)X
+1954(The)X
+2104(grow)X
+2294(phase)X
+2502(lasts)X
+2669(until)X
+2840(the)X
+2963(\256rst)X
+3112(release,)X
+3381(which)X
+3602(marks)X
+3823(the)X
+3946(start)X
+4109(of)X
+4201(the)X
+555 4377(shrink)N
+780(phase.)X
+1028(In)X
+1120(practice,)X
+1420(the)X
+1543(grow)X
+1733(phase)X
+1941(lasts)X
+2108(for)X
+2227(the)X
+2350(duration)X
+2642(of)X
+2734(a)X
+2795(transaction)X
+3172(in)X
+3259(LIBTP)X
+3506(and)X
+3647(in)X
+3734(commercial)X
+4138(data-)X
+555 4467(base)N
+721(systems.)X
+1037(The)X
+1184(shrink)X
+1406(phase)X
+1611(takes)X
+1798(place)X
+1990(during)X
+2221(transaction)X
+2595(commit)X
+2861(or)X
+2950(abort.)X
+3177(This)X
+3341(means)X
+3568(that)X
+3710(locks)X
+3901(are)X
+4022(acquired)X
+555 4557(on)N
+655(demand)X
+929(during)X
+1158(the)X
+1276(lifetime)X
+1545(of)X
+1632(a)X
+1688(transaction,)X
+2080(and)X
+2216(held)X
+2374(until)X
+2540(commit)X
+2804(time,)X
+2986(at)X
+3064(which)X
+3280(point)X
+3464(all)X
+3564(locks)X
+3753(are)X
+3872(released.)X
+755 4680(If)N
+832(multiple)X
+1121(transactions)X
+1527(are)X
+1649(active)X
+1864(concurrently,)X
+2313(deadlocks)X
+2657(can)X
+2792(occur)X
+2994(and)X
+3133(must)X
+3311(be)X
+3410(detected)X
+3701(and)X
+3840(resolved.)X
+4174(The)X
+555 4770(lock)N
+715(table)X
+893(can)X
+1027(be)X
+1125(thought)X
+1391(of)X
+1480(as)X
+1569(a)X
+1627(representation)X
+2104(of)X
+2193(a)X
+2251(directed)X
+2532(graph.)X
+2777(The)X
+2924(nodes)X
+3133(in)X
+3216(the)X
+3335(graph)X
+3539(are)X
+3659(transactions.)X
+4103(Edges)X
+555 4860(represent)N
+878(the)X
+3 f
+1004(waits-for)X
+1 f
+1340(relation)X
+1613(between)X
+1909(transactions;)X
+2342(if)X
+2419(transaction)X
+2 f
+2799(A)X
+1 f
+2876(is)X
+2957(waiting)X
+3225(for)X
+3347(a)X
+3411(lock)X
+3577(held)X
+3743(by)X
+3851(transaction)X
+2 f
+4230(B)X
+1 f
+4279(,)X
+555 4950(then)N
+716(a)X
+775(directed)X
+1057(edge)X
+1232(exists)X
+1437(from)X
+2 f
+1616(A)X
+1 f
+1687(to)X
+2 f
+1771(B)X
+1 f
+1842(in)X
+1926(the)X
+2046(graph.)X
+2291(A)X
+2371(deadlock)X
+2683(exists)X
+2887(if)X
+2958(a)X
+3016(cycle)X
+3208(appears)X
+3476(in)X
+3560(the)X
+3680(graph.)X
+3925(By)X
+4040(conven-)X
+555 5040(tion,)N
+719(no)X
+819(transaction)X
+1191(ever)X
+1350(waits)X
+1539(for)X
+1653(a)X
+1709(lock)X
+1867(it)X
+1931(already)X
+2188(holds,)X
+2401(so)X
+2492(re\257exive)X
+2793(edges)X
+2996(are)X
+3115(impossible.)X
+755 5163(A)N
+836(distinguished)X
+1285(process)X
+1549(monitors)X
+1856(the)X
+1977(lock)X
+2138(table,)X
+2337(searching)X
+2668(for)X
+2785(cycles.)X
+3048(The)X
+3195(frequency)X
+3539(with)X
+3703(which)X
+3921(this)X
+4058(process)X
+555 5253(runs)N
+716(is)X
+792(user-settable;)X
+1243(for)X
+1360(the)X
+1481(multi-user)X
+1833(tests)X
+1998(discussed)X
+2328(in)X
+2413(section)X
+2663(5.1.2,)X
+2866(it)X
+2933(has)X
+3063(been)X
+3238(set)X
+3350(to)X
+3435(wake)X
+3628(up)X
+3731(every)X
+3932(second,)X
+4197(but)X
+555 5343(more)N
+742(sophisticated)X
+1182(schedules)X
+1516(are)X
+1636(certainly)X
+1938(possible.)X
+2261(When)X
+2474(a)X
+2531(cycle)X
+2722(is)X
+2796(detected,)X
+3105(one)X
+3242(of)X
+3330(the)X
+3449(transactions)X
+3853(in)X
+3936(the)X
+4055(cycle)X
+4246(is)X
+555 5433(nominated)N
+917(and)X
+1057(aborted.)X
+1362(When)X
+1578(the)X
+1700(transaction)X
+2076(aborts,)X
+2315(it)X
+2382(rolls)X
+2547(back)X
+2722(its)X
+2820(changes)X
+3102(and)X
+3241(releases)X
+3519(its)X
+3617(locks,)X
+3829(thereby)X
+4093(break-)X
+555 5523(ing)N
+677(the)X
+795(cycle)X
+985(in)X
+1067(the)X
+1185(graph.)X
+
+8 p
+%%Page: 8 8
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+4 Ds
+1 Dt
+1866 865 MXY
+1338 0 Dl
+1866 1031 MXY
+1338 0 Dl
+1866 1199 MXY
+1338 0 Dl
+1866 1366 MXY
+1338 0 Dl
+1866 1533 MXY
+1338 0 Dl
+1866 1701 MXY
+1338 0 Dl
+-1 Ds
+5 Dt
+1866 1868 MXY
+1338 0 Dl
+1 Dt
+1 Di
+2981 MX
+ 2981 1868 lineto
+ 2981 1575 lineto
+ 3092 1575 lineto
+ 3092 1868 lineto
+ 2981 1868 lineto
+closepath 21 2981 1575 3092 1868 Dp
+2646 MX
+ 2646 1868 lineto
+ 2646 949 lineto
+ 2758 949 lineto
+ 2758 1868 lineto
+ 2646 1868 lineto
+closepath 14 2646 949 2758 1868 Dp
+2312 MX
+ 2312 1868 lineto
+ 2312 1701 lineto
+ 2423 1701 lineto
+ 2423 1868 lineto
+ 2312 1868 lineto
+closepath 3 2312 1701 2423 1868 Dp
+1977 MX
+ 1977 1868 lineto
+ 1977 1512 lineto
+ 2089 1512 lineto
+ 2089 1868 lineto
+ 1977 1868 lineto
+closepath 19 1977 1512 2089 1868 Dp
+3 f
+2640 2047(Client/Server)N
+1957(Single)X
+2185(Process)X
+7 s
+2957 1957(record)N
+2570(component)X
+2289(record)X
+1890(components)X
+1733 1724(.1)N
+1733 1556(.2)N
+1733 1389(.3)N
+1733 1222(.4)N
+1733 1055(.5)N
+1733 889(.6)N
+1590 726(Elapsed)N
+1794(Time)X
+1613 782(\(in)N
+1693(seconds\))X
+3 Dt
+-1 Ds
+8 s
+555 2255(Figure)N
+756(4:)X
+829(Comparison)X
+1187(of)X
+1260(High)X
+1416(and)X
+1540(Low)X
+1681(Level)X
+1850(Interfaces.)X
+1 f
+2174(Elapsed)X
+2395(time)X
+2528(in)X
+2597(seconds)X
+2818(to)X
+2887(perform)X
+3111(a)X
+3158(single)X
+3330(record)X
+3511(retrieval)X
+3742(from)X
+3885(a)X
+3932(command)X
+4203(line)X
+555 2345(\(rather)N
+751(than)X
+888(a)X
+943(procedural)X
+1241(interface\))X
+1510(is)X
+1579(shown)X
+1772(on)X
+1862(the)X
+1966(y)X
+2024(axis.)X
+2185(The)X
+2310(``component'')X
+2704(numbers)X
+2950(re\257ect)X
+3135(the)X
+3239(timings)X
+3458(when)X
+3622(the)X
+3726(record)X
+3914(is)X
+3983(retrieved)X
+4235(by)X
+555 2435(separate)N
+785(calls)X
+924(to)X
+996(the)X
+1096(lock)X
+1228(manager)X
+1469(and)X
+1583(buffer)X
+1760(manager)X
+2001(while)X
+2165(the)X
+2264(``record'')X
+2531(timings)X
+2745(were)X
+2889(obtained)X
+3130(by)X
+3215(using)X
+3375(a)X
+3424(single)X
+3598(call)X
+3711(to)X
+3782(the)X
+3881(record)X
+4064(manager.)X
+555 2525(The)N
+674(2:1)X
+776(ratio)X
+913(observed)X
+1163(for)X
+1257(the)X
+1355(single)X
+1528(process)X
+1739(case)X
+1868(is)X
+1930(a)X
+1977(re\257ection)X
+2237(of)X
+2309(the)X
+2406(parsing)X
+2613(overhead)X
+2865(for)X
+2958(executing)X
+3225(eight)X
+3372(separate)X
+3599(commands)X
+3895(rather)X
+4062(than)X
+4191(one.)X
+555 2615(The)N
+673(additional)X
+948(factor)X
+1115(of)X
+1187(one)X
+1298(re\257ected)X
+1536(in)X
+1605(the)X
+1702(3:1)X
+1803(ratio)X
+1939(for)X
+2031(the)X
+2127(client/server)X
+2460(architecture)X
+2794(is)X
+2855(due)X
+2965(to)X
+3033(the)X
+3129(communication)X
+3545(overhead.)X
+3828(The)X
+3945(true)X
+4062(ratios)X
+4222(are)X
+555 2705(actually)N
+775(worse)X
+945(since)X
+1094(the)X
+1190(component)X
+1492(timings)X
+1703(do)X
+1785(not)X
+1884(re\257ect)X
+2060(the)X
+2155(search)X
+2334(times)X
+2490(within)X
+2671(each)X
+2804(page)X
+2941(or)X
+3011(the)X
+3106(time)X
+3237(required)X
+3466(to)X
+3533(transmit)X
+3760(the)X
+3855(page)X
+3992(between)X
+4221(the)X
+555 2795(two)N
+667(processes.)X
+10 s
+10 f
+555 2885(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+3 f
+555 3161(4.2.)N
+715(Group)X
+961(Commit)X
+1 f
+755 3284(Since)N
+959(the)X
+1083(log)X
+1211(must)X
+1392(be)X
+1494(\257ushed)X
+1751(to)X
+1839(disk)X
+1997(at)X
+2080(commit)X
+2349(time,)X
+2536(disk)X
+2694(bandwidth)X
+3057(fundamentally)X
+3545(limits)X
+3751(the)X
+3874(rate)X
+4020(at)X
+4103(which)X
+555 3374(transactions)N
+959(complete.)X
+1314(Since)X
+1513(most)X
+1688(transactions)X
+2091(write)X
+2276(only)X
+2438(a)X
+2494(few)X
+2635(small)X
+2828(records)X
+3085(to)X
+3167(the)X
+3285(log,)X
+3427(the)X
+3545(last)X
+3676(page)X
+3848(of)X
+3935(the)X
+4053(log)X
+4175(will)X
+555 3464(be)N
+658(\257ushed)X
+916(once)X
+1095(by)X
+1202(every)X
+1408(transaction)X
+1787(which)X
+2010(writes)X
+2233(to)X
+2322(it.)X
+2433(In)X
+2527(the)X
+2652(naive)X
+2853(implementation,)X
+3402(these)X
+3593(\257ushes)X
+3841(would)X
+4067(happen)X
+555 3554(serially.)N
+755 3677(LIBTP)N
+1008(uses)X
+3 f
+1177(group)X
+1412(commit)X
+1 f
+1702([DEWI84])X
+2077(in)X
+2170(order)X
+2371(to)X
+2464(amortize)X
+2775(the)X
+2903(cost)X
+3062(of)X
+3159(one)X
+3305(synchronous)X
+3740(disk)X
+3903(write)X
+4098(across)X
+555 3767(multiple)N
+851(transactions.)X
+1304(Group)X
+1539(commit)X
+1812(provides)X
+2117(a)X
+2182(way)X
+2345(for)X
+2468(a)X
+2533(group)X
+2749(of)X
+2845(transactions)X
+3257(to)X
+3348(commit)X
+3621(simultaneously.)X
+4174(The)X
+555 3857(\256rst)N
+709(several)X
+967(transactions)X
+1380(to)X
+1472(commit)X
+1745(write)X
+1939(their)X
+2115(changes)X
+2403(to)X
+2494(the)X
+2621(in-memory)X
+3006(log)X
+3137(page,)X
+3338(then)X
+3505(sleep)X
+3699(on)X
+3808(a)X
+3873(distinguished)X
+555 3947(semaphore.)N
+966(Later,)X
+1179(a)X
+1238(committing)X
+1629(transaction)X
+2004(\257ushes)X
+2249(the)X
+2370(page)X
+2545(to)X
+2630(disk,)X
+2805(and)X
+2943(wakes)X
+3166(up)X
+3268(all)X
+3370(its)X
+3467(sleeping)X
+3756(peers.)X
+3988(The)X
+4135(point)X
+555 4037(at)N
+635(which)X
+853(changes)X
+1134(are)X
+1255(actually)X
+1531(written)X
+1780(is)X
+1855(determined)X
+2238(by)X
+2340(three)X
+2523(thresholds.)X
+2914(The)X
+3061(\256rst)X
+3207(is)X
+3281(the)X
+2 f
+3400(group)X
+3612(threshold)X
+1 f
+3935(and)X
+4072(de\256nes)X
+555 4127(the)N
+674(minimum)X
+1005(number)X
+1271(of)X
+1359(transactions)X
+1763(which)X
+1979(must)X
+2154(be)X
+2250(active)X
+2462(in)X
+2544(the)X
+2662(system)X
+2904(before)X
+3130(transactions)X
+3533(are)X
+3652(forced)X
+3878(to)X
+3960(participate)X
+555 4217(in)N
+646(a)X
+711(group)X
+927(commit.)X
+1240(The)X
+1394(second)X
+1646(is)X
+1728(the)X
+2 f
+1855(wait)X
+2021(threshold)X
+1 f
+2352(which)X
+2577(is)X
+2658(expressed)X
+3003(as)X
+3098(the)X
+3224(percentage)X
+3601(of)X
+3696(active)X
+3916(transactions)X
+555 4307(waiting)N
+826(to)X
+919(be)X
+1026(committed.)X
+1439(The)X
+1595(last)X
+1737(is)X
+1821(the)X
+2 f
+1950(logdelay)X
+2257(threshold)X
+1 f
+2590(which)X
+2816(indicates)X
+3131(how)X
+3299(much)X
+3507(un\257ushed)X
+3848(log)X
+3980(should)X
+4223(be)X
+555 4397(allowed)N
+829(to)X
+911(accumulate)X
+1297(before)X
+1523(a)X
+1579(waiting)X
+1839(transaction's)X
+2289(commit)X
+2553(record)X
+2779(is)X
+2852(\257ushed.)X
+755 4520(Group)N
+981(commit)X
+1246(can)X
+1379(substantially)X
+1803(improve)X
+2090(performance)X
+2517(for)X
+2631(high-concurrency)X
+3218(environments.)X
+3714(If)X
+3788(only)X
+3950(a)X
+4006(few)X
+4147(tran-)X
+555 4610(sactions)N
+836(are)X
+957(running,)X
+1248(it)X
+1314(is)X
+1389(unlikely)X
+1673(to)X
+1757(improve)X
+2046(things)X
+2263(at)X
+2343(all.)X
+2485(The)X
+2632(crossover)X
+2962(point)X
+3148(is)X
+3223(the)X
+3343(point)X
+3529(at)X
+3609(which)X
+3827(the)X
+3947(transaction)X
+555 4700(commit)N
+823(rate)X
+968(is)X
+1045(limited)X
+1295(by)X
+1399(the)X
+1521(bandwidth)X
+1883(of)X
+1974(the)X
+2096(device)X
+2330(on)X
+2434(which)X
+2654(the)X
+2776(log)X
+2902(resides.)X
+3189(If)X
+3267(processes)X
+3599(are)X
+3722(trying)X
+3937(to)X
+4023(\257ush)X
+4201(the)X
+555 4790(log)N
+677(faster)X
+876(than)X
+1034(the)X
+1152(log)X
+1274(disk)X
+1427(can)X
+1559(accept)X
+1785(data,)X
+1959(then)X
+2117(group)X
+2324(commit)X
+2588(will)X
+2732(increase)X
+3016(the)X
+3134(commit)X
+3398(rate.)X
+3 f
+555 4976(4.3.)N
+715(Kernel)X
+971(Intervention)X
+1418(for)X
+1541(Synchronization)X
+1 f
+755 5099(Since)N
+954(LIBTP)X
+1197(uses)X
+1356(data)X
+1511(in)X
+1594(shared)X
+1825(memory)X
+2113(\()X
+2 f
+2140(e.g.)X
+1 f
+2277(the)X
+2395(lock)X
+2553(table)X
+2729(and)X
+2865(buffer)X
+3082(pool\))X
+3271(it)X
+3335(must)X
+3510(be)X
+3606(possible)X
+3888(for)X
+4002(a)X
+4058(process)X
+555 5189(to)N
+640(acquire)X
+900(exclusive)X
+1226(access)X
+1454(to)X
+1538(shared)X
+1770(data)X
+1926(in)X
+2010(order)X
+2202(to)X
+2286(prevent)X
+2549(corruption.)X
+2945(In)X
+3034(addition,)X
+3338(the)X
+3458(process)X
+3721(manager)X
+4020(must)X
+4197(put)X
+555 5279(processes)N
+886(to)X
+971(sleep)X
+1159(when)X
+1356(the)X
+1477(lock)X
+1638(or)X
+1728(buffer)X
+1948(they)X
+2109(request)X
+2364(is)X
+2440(in)X
+2525(use)X
+2655(by)X
+2758(some)X
+2950(other)X
+3138(process.)X
+3441(In)X
+3530(the)X
+3650(LIBTP)X
+3894(implementa-)X
+555 5385(tion)N
+705(under)X
+914(Ultrix)X
+1131(4.0)X
+7 s
+5353(2)Y
+10 s
+5385(,)Y
+1305(we)X
+1424(use)X
+1556(System)X
+1816(V)X
+1899(semaphores)X
+2303(to)X
+2390(provide)X
+2660(this)X
+2800(synchronization.)X
+3377(Semaphores)X
+3794(implemented)X
+4237(in)X
+555 5475(this)N
+701(fashion)X
+968(turn)X
+1128(out)X
+1261(to)X
+1354(be)X
+1461(an)X
+1568(expensive)X
+1920(choice)X
+2161(for)X
+2285(synchronization,)X
+2847(because)X
+3132(each)X
+3310(access)X
+3546(traps)X
+3732(to)X
+3824(the)X
+3952(kernel)X
+4183(and)X
+8 s
+10 f
+555 5547(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)N
+5 s
+1 f
+727 5625(2)N
+8 s
+763 5650(Ultrix)N
+932(and)X
+1040(DEC)X
+1184(are)X
+1277(trademarks)X
+1576(of)X
+1645(Digital)X
+1839(Equipment)X
+2136(Corporation.)X
+
+9 p
+%%Page: 9 9
+8 s 8 xH 0 xS 1 f
+10 s
+3 f
+1 f
+555 630(executes)N
+852(atomically)X
+1210(there.)X
+755 753(On)N
+878(architectures)X
+1314(that)X
+1459(support)X
+1724(atomic)X
+1967(test-and-set,)X
+2382(a)X
+2443(much)X
+2646(better)X
+2854(choice)X
+3089(would)X
+3314(be)X
+3415(to)X
+3502(attempt)X
+3767(to)X
+3854(obtain)X
+4079(a)X
+4139(spin-)X
+555 843(lock)N
+714(with)X
+877(a)X
+934(test-and-set,)X
+1345(and)X
+1482(issue)X
+1663(a)X
+1720(system)X
+1963(call)X
+2100(only)X
+2263(if)X
+2333(the)X
+2452(spinlock)X
+2744(is)X
+2818(unavailable.)X
+3249(Since)X
+3447(virtually)X
+3738(all)X
+3838(semaphores)X
+4237(in)X
+555 933(LIBTP)N
+801(are)X
+924(uncontested)X
+1330(and)X
+1469(are)X
+1591(held)X
+1752(for)X
+1869(very)X
+2035(short)X
+2218(periods)X
+2477(of)X
+2567(time,)X
+2752(this)X
+2890(would)X
+3113(improve)X
+3403(performance.)X
+3873(For)X
+4007(example,)X
+555 1023(processes)N
+885(must)X
+1062(acquire)X
+1321(exclusive)X
+1646(access)X
+1874(to)X
+1958(buffer)X
+2177(pool)X
+2341(metadata)X
+2653(in)X
+2737(order)X
+2929(to)X
+3013(\256nd)X
+3159(and)X
+3297(pin)X
+3421(a)X
+3479(buffer)X
+3698(in)X
+3781(shared)X
+4012(memory.)X
+555 1113(This)N
+721(semaphore)X
+1093(is)X
+1170(requested)X
+1502(most)X
+1681(frequently)X
+2034(in)X
+2119(LIBTP.)X
+2404(However,)X
+2742(once)X
+2917(it)X
+2984(is)X
+3060(acquired,)X
+3380(only)X
+3545(a)X
+3604(few)X
+3748(instructions)X
+4144(must)X
+555 1203(be)N
+656(executed)X
+966(before)X
+1196(it)X
+1264(is)X
+1341(released.)X
+1669(On)X
+1791(one)X
+1931(architecture)X
+2335(for)X
+2453(which)X
+2673(we)X
+2791(were)X
+2972(able)X
+3130(to)X
+3216(gather)X
+3441(detailed)X
+3719(pro\256ling)X
+4018(informa-)X
+555 1293(tion,)N
+729(the)X
+857(cost)X
+1015(of)X
+1111(the)X
+1238(semaphore)X
+1615(calls)X
+1791(accounted)X
+2146(for)X
+2269(25%)X
+2445(of)X
+2541(the)X
+2668(total)X
+2839(time)X
+3010(spent)X
+3208(updating)X
+3517(the)X
+3644(metadata.)X
+4003(This)X
+4174(was)X
+555 1383(fairly)N
+749(consistent)X
+1089(across)X
+1310(most)X
+1485(of)X
+1572(the)X
+1690(critical)X
+1933(sections.)X
+755 1506(In)N
+848(an)X
+950(attempt)X
+1216(to)X
+1304(quantify)X
+1597(the)X
+1720(overhead)X
+2040(of)X
+2132(kernel)X
+2358(synchronization,)X
+2915(we)X
+3034(ran)X
+3162(tests)X
+3329(on)X
+3434(a)X
+3495(version)X
+3756(of)X
+3848(4.3BSD-Reno)X
+555 1596(which)N
+786(had)X
+937(been)X
+1123(modi\256ed)X
+1441(to)X
+1537(support)X
+1811(binary)X
+2050(semaphore)X
+2432(facilities)X
+2742(similar)X
+2998(to)X
+3094(those)X
+3297(described)X
+3639(in)X
+3735([POSIX91].)X
+4174(The)X
+555 1686(hardware)N
+880(platform)X
+1181(consisted)X
+1504(of)X
+1595(an)X
+1695(HP300)X
+1941(\(33MHz)X
+2237(MC68030\))X
+2612(workstation)X
+3014(with)X
+3180(16MBytes)X
+3537(of)X
+3628(main)X
+3812(memory,)X
+4123(and)X
+4263(a)X
+555 1776(600MByte)N
+920(HP7959)X
+1205(SCSI)X
+1396(disk)X
+1552(\(17)X
+1682(ms)X
+1798(average)X
+2072(seek)X
+2237(time\).)X
+2468(We)X
+2602(ran)X
+2727(three)X
+2910(sets)X
+3052(of)X
+3141(comparisons)X
+3568(which)X
+3786(are)X
+3907(summarized)X
+555 1866(in)N
+645(\256gure)X
+860(\256ve.)X
+1028(In)X
+1123(each)X
+1299(comparison)X
+1701(we)X
+1823(ran)X
+1954(two)X
+2102(tests,)X
+2292(one)X
+2436(using)X
+2637(hardware)X
+2965(spinlocks)X
+3295(and)X
+3438(the)X
+3563(other)X
+3755(using)X
+3955(kernel)X
+4183(call)X
+555 1956(synchronization.)N
+1135(Since)X
+1341(the)X
+1467(test)X
+1606(was)X
+1758(run)X
+1892(single-user,)X
+2291(none)X
+2474(of)X
+2568(the)X
+2693(the)X
+2818(locks)X
+3014(were)X
+3198(contested.)X
+3568(In)X
+3662(the)X
+3787(\256rst)X
+3938(two)X
+4085(sets)X
+4232(of)X
+555 2046(tests,)N
+743(we)X
+863(ran)X
+992(the)X
+1116(full)X
+1253(transaction)X
+1631(processing)X
+2000(benchmark)X
+2383(described)X
+2717(in)X
+2805(section)X
+3058(5.1.)X
+3223(In)X
+3315(one)X
+3456(case)X
+3620(we)X
+3739(ran)X
+3867(with)X
+4034(both)X
+4201(the)X
+555 2136(database)N
+854(and)X
+992(log)X
+1116(on)X
+1218(the)X
+1338(same)X
+1525(disk)X
+1680(\(1)X
+1769(Disk\))X
+1969(and)X
+2107(in)X
+2191(the)X
+2311(second,)X
+2576(we)X
+2692(ran)X
+2817(with)X
+2981(the)X
+3101(database)X
+3400(and)X
+3538(log)X
+3661(on)X
+3762(separate)X
+4047(disks)X
+4232(\(2)X
+555 2226(Disk\).)N
+800(In)X
+894(the)X
+1019(last)X
+1157(test,)X
+1315(we)X
+1436(wanted)X
+1695(to)X
+1784(create)X
+2004(a)X
+2067(CPU)X
+2249(bound)X
+2476(environment,)X
+2928(so)X
+3026(we)X
+3146(used)X
+3319(a)X
+3381(database)X
+3684(small)X
+3883(enough)X
+4145(to)X
+4233(\256t)X
+555 2316(completely)N
+941(in)X
+1033(the)X
+1161(cache)X
+1375(and)X
+1521(issued)X
+1751(read-only)X
+2089(transactions.)X
+2541(The)X
+2695(results)X
+2933(in)X
+3024(\256gure)X
+3240(\256ve)X
+3389(express)X
+3659(the)X
+3786(kernel)X
+4016(call)X
+4161(syn-)X
+555 2406(chronization)N
+980(performance)X
+1411(as)X
+1502(a)X
+1562(percentage)X
+1935(of)X
+2026(the)X
+2148(spinlock)X
+2443(performance.)X
+2914(For)X
+3049(example,)X
+3365(in)X
+3451(the)X
+3573(1)X
+3637(disk)X
+3794(case,)X
+3977(the)X
+4098(kernel)X
+555 2496(call)N
+697(implementation)X
+1225(achieved)X
+1537(4.4)X
+1662(TPS)X
+1824(\(transactions)X
+2259(per)X
+2387(second\))X
+2662(while)X
+2865(the)X
+2988(semaphore)X
+3361(implementation)X
+3888(achieved)X
+4199(4.6)X
+555 2586(TPS,)N
+735(and)X
+874(the)X
+995(relative)X
+1259(performance)X
+1689(of)X
+1779(the)X
+1900(kernel)X
+2123(synchronization)X
+2657(is)X
+2732(96%)X
+2901(that)X
+3043(of)X
+3132(the)X
+3252(spinlock)X
+3545(\(100)X
+3714(*)X
+3776(4.4)X
+3898(/)X
+3942(4.6\).)X
+4111(There)X
+555 2676(are)N
+674(two)X
+814(striking)X
+1078(observations)X
+1503(from)X
+1679(these)X
+1864(results:)X
+10 f
+635 2799(g)N
+1 f
+755(even)X
+927(when)X
+1121(the)X
+1239(system)X
+1481(is)X
+1554(disk)X
+1707(bound,)X
+1947(the)X
+2065(CPU)X
+2240(cost)X
+2389(of)X
+2476(synchronization)X
+3008(is)X
+3081(noticeable,)X
+3451(and)X
+10 f
+635 2922(g)N
+1 f
+755(when)X
+949(we)X
+1063(are)X
+1182(CPU)X
+1357(bound,)X
+1597(the)X
+1715(difference)X
+2062(is)X
+2135(dramatic)X
+2436(\(67%\).)X
+3 f
+555 3108(4.4.)N
+715(Transaction)X
+1148(Protected)X
+1499(Access)X
+1747(Methods)X
+1 f
+755 3231(The)N
+903(B-tree)X
+1127(and)X
+1266(\256xed)X
+1449(length)X
+1671(recno)X
+1872(\(record)X
+2127(number\))X
+2421(access)X
+2649(methods)X
+2942(have)X
+3116(been)X
+3290(modi\256ed)X
+3596(to)X
+3680(provide)X
+3947(transaction)X
+555 3321(protection.)N
+941(Whereas)X
+1244(the)X
+1363(previously)X
+1722(published)X
+2054(interface)X
+2357(to)X
+2440(the)X
+2559(access)X
+2786(routines)X
+3065(had)X
+3202(separate)X
+3487(open)X
+3664(calls)X
+3832(for)X
+3946(each)X
+4114(of)X
+4201(the)X
+10 f
+555 3507(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+1 Dt
+2978 5036 MXY
+ 2978 5036 lineto
+ 2978 4662 lineto
+ 3093 4662 lineto
+ 3093 5036 lineto
+ 2978 5036 lineto
+closepath 21 2978 4662 3093 5036 Dp
+2518 MX
+ 2518 5036 lineto
+ 2518 3960 lineto
+ 2633 3960 lineto
+ 2633 5036 lineto
+ 2518 5036 lineto
+closepath 3 2518 3960 2633 5036 Dp
+2059 MX
+ 2059 5036 lineto
+ 2059 3946 lineto
+ 2174 3946 lineto
+ 2174 5036 lineto
+ 2059 5036 lineto
+closepath 1 2059 3946 2174 5036 Dp
+3 f
+7 s
+2912 5141(Read-only)N
+1426 3767(of)N
+1487(Spinlock)X
+1710(Throughput)X
+1480 3710(Throughput)N
+1786(as)X
+1850(a)X
+1892(%)X
+11 s
+1670 4843(20)N
+1670 4614(40)N
+1670 4384(60)N
+1670 4155(80)N
+1648 3925(100)N
+7 s
+2041 5141(1)N
+2083(Disk)X
+2490(2)X
+2532(Disks)X
+5 Dt
+1829 5036 MXY
+1494 0 Dl
+4 Ds
+1 Dt
+1829 4806 MXY
+1494 0 Dl
+1829 4577 MXY
+1494 0 Dl
+1829 4347 MXY
+1494 0 Dl
+1829 4118 MXY
+1494 0 Dl
+1829 3888 MXY
+1494 0 Dl
+3 Dt
+-1 Ds
+8 s
+555 5360(Figure)N
+753(5:)X
+823(Kernel)X
+1028(Overhead)X
+1315(for)X
+1413(System)X
+1625(Call)X
+1756(Synchronization.)X
+1 f
+2254(The)X
+2370(performance)X
+2708(of)X
+2778(the)X
+2873(kernel)X
+3049(call)X
+3158(synchronization)X
+3583(is)X
+3643(expressed)X
+3911(as)X
+3980(a)X
+4024(percentage)X
+555 5450(of)N
+625(the)X
+720(spinlock)X
+954(synchronization)X
+1379(performance.)X
+1749(In)X
+1819(disk)X
+1943(bound)X
+2120(cases)X
+2271(\(1)X
+2341(Disk)X
+2479(and)X
+2588(2)X
+2637(Disks\),)X
+2837(we)X
+2928(see)X
+3026(that)X
+3139(4-6%)X
+3294(of)X
+3364(the)X
+3459(performance)X
+3797(is)X
+3857(lost)X
+3966(due)X
+4074(to)X
+4140(kernel)X
+555 5540(calls)N
+688(while)X
+846(in)X
+912(the)X
+1006(CPU)X
+1147(bound)X
+1323(case,)X
+1464(we)X
+1554(have)X
+1690(lost)X
+1799(67%)X
+1932(of)X
+2001(the)X
+2095(performance)X
+2432(due)X
+2540(to)X
+2606(kernel)X
+2781(calls.)X
+
+10 p
+%%Page: 10 10
+8 s 8 xH 0 xS 1 f
+10 s
+3 f
+1 f
+555 630(access)N
+781(methods,)X
+1092(we)X
+1206(now)X
+1364(have)X
+1536(an)X
+1632(integrated)X
+1973(open)X
+2149(call)X
+2285(with)X
+2447(the)X
+2565(following)X
+2896(calling)X
+3134(conventions:)X
+7 f
+715 753(DB)N
+859(*dbopen)X
+1243(\(const)X
+1579(char)X
+1819(*file,)X
+2155(int)X
+2347(flags,)X
+2683(int)X
+2875(mode,)X
+3163(DBTYPE)X
+3499(type,)X
+1291 843(int)N
+1483(dbflags,)X
+1915(const)X
+2203(void)X
+2443(*openinfo\))X
+1 f
+555 966(where)N
+2 f
+774(\256le)X
+1 f
+894(is)X
+969(the)X
+1089(name)X
+1285(of)X
+1374(the)X
+1494(\256le)X
+1618(being)X
+1818(opened,)X
+2 f
+2092(\257ags)X
+1 f
+2265(and)X
+2 f
+2402(mode)X
+1 f
+2597(are)X
+2717(the)X
+2836(standard)X
+3129(arguments)X
+3484(to)X
+3 f
+3567(open)X
+1 f
+3731(\(2\),)X
+2 f
+3866(type)X
+1 f
+4021(is)X
+4095(one)X
+4232(of)X
+555 1056(the)N
+680(access)X
+913(method)X
+1180(types,)X
+2 f
+1396(db\257ags)X
+1 f
+1654(indicates)X
+1966(the)X
+2091(mode)X
+2296(of)X
+2390(the)X
+2515(buffer)X
+2739(pool)X
+2907(and)X
+3049(transaction)X
+3427(protection,)X
+3798(and)X
+2 f
+3940(openinfo)X
+1 f
+4246(is)X
+555 1146(the)N
+681(access)X
+915(method)X
+1183(speci\256c)X
+1456(information.)X
+1902(Currently,)X
+2257(the)X
+2383(possible)X
+2673(values)X
+2906(for)X
+2 f
+3028(db\257ags)X
+1 f
+3287(are)X
+3414(DB_SHARED)X
+3912(and)X
+4055(DB_TP)X
+555 1236(indicating)N
+895(that)X
+1035(buffers)X
+1283(should)X
+1516(be)X
+1612(kept)X
+1770(in)X
+1852(a)X
+1908(shared)X
+2138(buffer)X
+2355(pool)X
+2517(and)X
+2653(that)X
+2793(the)X
+2911(\256le)X
+3033(should)X
+3266(be)X
+3362(transaction)X
+3734(protected.)X
+755 1359(The)N
+900(modi\256cations)X
+1355(required)X
+1643(to)X
+1725(add)X
+1861(transaction)X
+2233(protection)X
+2578(to)X
+2660(an)X
+2756(access)X
+2982(method)X
+3242(are)X
+3361(quite)X
+3541(simple)X
+3774(and)X
+3910(localized.)X
+715 1482(1.)N
+795(Replace)X
+1074(\256le)X
+2 f
+1196(open)X
+1 f
+1372(with)X
+2 f
+1534(buf_open)X
+1 f
+1832(.)X
+715 1572(2.)N
+795(Replace)X
+1074(\256le)X
+2 f
+1196(read)X
+1 f
+1363(and)X
+2 f
+1499(write)X
+1 f
+1683(calls)X
+1850(with)X
+2012(buffer)X
+2229(manager)X
+2526(calls)X
+2693(\()X
+2 f
+2720(buf_get)X
+1 f
+(,)S
+2 f
+3000(buf_unpin)X
+1 f
+3324(\).)X
+715 1662(3.)N
+795(Precede)X
+1070(buffer)X
+1287(manager)X
+1584(calls)X
+1751(with)X
+1913(an)X
+2009(appropriate)X
+2395(\(read)X
+2581(or)X
+2668(write\))X
+2880(lock)X
+3038(call.)X
+715 1752(4.)N
+795(Before)X
+1034(updates,)X
+1319(issue)X
+1499(a)X
+1555(logging)X
+1819(operation.)X
+715 1842(5.)N
+795(After)X
+985(data)X
+1139(have)X
+1311(been)X
+1483(accessed,)X
+1805(release)X
+2049(the)X
+2167(buffer)X
+2384(manager)X
+2681(pin.)X
+715 1932(6.)N
+795(Provide)X
+1064(undo/redo)X
+1409(code)X
+1581(for)X
+1695(each)X
+1863(type)X
+2021(of)X
+2108(log)X
+2230(record)X
+2456(de\256ned.)X
+555 2071(The)N
+702(following)X
+1035(code)X
+1209(fragments)X
+1552(show)X
+1743(how)X
+1903(to)X
+1987(transaction)X
+2361(protect)X
+2606(several)X
+2856(updates)X
+3123(to)X
+3206(a)X
+3263(B-tree.)X
+7 s
+3484 2039(3)N
+10 s
+3533 2071(In)N
+3621(the)X
+3740(unprotected)X
+4140(case,)X
+555 2161(an)N
+652(open)X
+829(call)X
+966(is)X
+1040(followed)X
+1346(by)X
+1447(a)X
+1504(read)X
+1664(call)X
+1801(to)X
+1884(obtain)X
+2105(the)X
+2224(meta-data)X
+2562(for)X
+2677(the)X
+2796(B-tree.)X
+3058(Instead,)X
+3331(we)X
+3446(issue)X
+3627(an)X
+3724(open)X
+3901(to)X
+3984(the)X
+4102(buffer)X
+555 2251(manager)N
+852(to)X
+934(obtain)X
+1154(a)X
+1210(\256le)X
+1332(id)X
+1414(and)X
+1550(a)X
+1606(buffer)X
+1823(request)X
+2075(to)X
+2157(obtain)X
+2377(the)X
+2495(meta-data)X
+2832(as)X
+2919(shown)X
+3148(below.)X
+7 f
+715 2374(char)N
+955(*path;)X
+715 2464(int)N
+907(fid,)X
+1147(flags,)X
+1483(len,)X
+1723(mode;)X
+715 2644(/*)N
+859(Obtain)X
+1195(a)X
+1291(file)X
+1531(id)X
+1675(with)X
+1915(which)X
+2203(to)X
+2347(access)X
+2683(the)X
+2875(buffer)X
+3211(pool)X
+3451(*/)X
+715 2734(fid)N
+907(=)X
+1003(buf_open\(path,)X
+1723(flags,)X
+2059(mode\);)X
+715 2914(/*)N
+859(Read)X
+1099(the)X
+1291(meta)X
+1531(data)X
+1771(\(page)X
+2059(0\))X
+2203(for)X
+2395(the)X
+2587(B-tree)X
+2923(*/)X
+715 3004(if)N
+859(\(tp_lock\(fid,)X
+1531(0,)X
+1675(READ_LOCK\)\))X
+1003 3094(return)N
+1339(error;)X
+715 3184(meta_data_ptr)N
+1387(=)X
+1483(buf_get\(fid,)X
+2107(0,)X
+2251(BF_PIN,)X
+2635(&len\);)X
+1 f
+555 3307(The)N
+714(BF_PIN)X
+1014(argument)X
+1350(to)X
+2 f
+1445(buf_get)X
+1 f
+1718(indicates)X
+2036(that)X
+2189(we)X
+2316(wish)X
+2500(to)X
+2595(leave)X
+2798(this)X
+2946(page)X
+3131(pinned)X
+3382(in)X
+3477(memory)X
+3777(so)X
+3881(that)X
+4034(it)X
+4111(is)X
+4197(not)X
+555 3397(swapped)N
+862(out)X
+990(while)X
+1194(we)X
+1314(are)X
+1439(accessing)X
+1772(it.)X
+1881(The)X
+2031(last)X
+2167(argument)X
+2495(to)X
+2 f
+2582(buf_get)X
+1 f
+2847(returns)X
+3095(the)X
+3218(number)X
+3488(of)X
+3580(bytes)X
+3774(on)X
+3879(the)X
+4002(page)X
+4179(that)X
+555 3487(were)N
+732(valid)X
+912(so)X
+1003(that)X
+1143(the)X
+1261(access)X
+1487(method)X
+1747(may)X
+1905(initialize)X
+2205(the)X
+2323(page)X
+2495(if)X
+2564(necessary.)X
+755 3610(Next,)N
+955(consider)X
+1251(inserting)X
+1555(a)X
+1615(record)X
+1845(on)X
+1949(a)X
+2009(particular)X
+2341(page)X
+2517(of)X
+2608(a)X
+2668(B-tree.)X
+2932(In)X
+3022(the)X
+3143(unprotected)X
+3545(case,)X
+3727(we)X
+3844(read)X
+4006(the)X
+4127(page,)X
+555 3700(call)N
+2 f
+693(_bt_insertat)X
+1 f
+1079(,)X
+1121(and)X
+1258(write)X
+1444(the)X
+1563(page.)X
+1776(Instead,)X
+2049(we)X
+2164(lock)X
+2323(the)X
+2442(page,)X
+2635(request)X
+2888(the)X
+3007(buffer,)X
+3245(log)X
+3368(the)X
+3487(change,)X
+3756(modify)X
+4008(the)X
+4127(page,)X
+555 3790(and)N
+691(release)X
+935(the)X
+1053(buffer.)X
+7 f
+715 3913(int)N
+907(fid,)X
+1147(len,)X
+1387(pageno;)X
+1867(/*)X
+2011(Identifies)X
+2539(the)X
+2731(buffer)X
+3067(*/)X
+715 4003(int)N
+907(index;)X
+1867(/*)X
+2011(Location)X
+2443(at)X
+2587(which)X
+2875(to)X
+3019(insert)X
+3355(the)X
+3547(new)X
+3739(pair)X
+3979(*/)X
+715 4093(DBT)N
+907(*keyp,)X
+1243(*datap;)X
+1867(/*)X
+2011(Key/Data)X
+2443(pair)X
+2683(to)X
+2827(be)X
+2971(inserted)X
+3403(*/)X
+715 4183(DATUM)N
+1003(*d;)X
+1867(/*)X
+2011(Key/data)X
+2443(structure)X
+2923(to)X
+3067(insert)X
+3403(*/)X
+715 4363(/*)N
+859(Lock)X
+1099(and)X
+1291(request)X
+1675(the)X
+1867(buffer)X
+2203(*/)X
+715 4453(if)N
+859(\(tp_lock\(fid,)X
+1531(pageno,)X
+1915(WRITE_LOCK\)\))X
+1003 4543(return)N
+1339(error;)X
+715 4633(buffer_ptr)N
+1243(=)X
+1339(buf_get\(fid,)X
+1963(pageno,)X
+2347(BF_PIN,)X
+2731(&len\);)X
+715 4813(/*)N
+859(Log)X
+1051(and)X
+1243(perform)X
+1627(the)X
+1819(update)X
+2155(*/)X
+715 4903(log_insdel\(BTREE_INSERT,)N
+1915(fid,)X
+2155(pageno,)X
+2539(keyp,)X
+2827(datap\);)X
+715 4993(_bt_insertat\(buffer_ptr,)N
+1915(d,)X
+2059(index\);)X
+715 5083(buf_unpin\(buffer_ptr\);)N
+1 f
+555 5206(Succinctly,)N
+942(the)X
+1068(algorithm)X
+1407(for)X
+1529(turning)X
+1788(unprotected)X
+2195(code)X
+2375(into)X
+2527(protected)X
+2854(code)X
+3034(is)X
+3115(to)X
+3205(replace)X
+3466(read)X
+3633(operations)X
+3995(with)X
+2 f
+4165(lock)X
+1 f
+555 5296(and)N
+2 f
+691(buf_get)X
+1 f
+951(operations)X
+1305(and)X
+1441(write)X
+1626(operations)X
+1980(with)X
+2 f
+2142(log)X
+1 f
+2264(and)X
+2 f
+2400(buf_unpin)X
+1 f
+2744(operations.)X
+8 s
+10 f
+555 5458(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)N
+5 s
+1 f
+727 5536(3)N
+8 s
+766 5561(The)N
+884(following)X
+1152(code)X
+1291(fragments)X
+1565(are)X
+1661(examples,)X
+1937(but)X
+2038(do)X
+2120(not)X
+2220(de\256ne)X
+2394(the)X
+2490(\256nal)X
+2622(interface.)X
+2894(The)X
+3011(\256nal)X
+3143(interface)X
+3383(will)X
+3501(be)X
+3579(determined)X
+3884(after)X
+4018(LIBTP)X
+4214(has)X
+555 5633(been)N
+691(fully)X
+828(integrated)X
+1099(with)X
+1229(the)X
+1323(most)X
+1464(recent)X
+3 f
+1635(db)X
+1 f
+1707(\(3\))X
+1797(release)X
+1989(from)X
+2129(the)X
+2223(Computer)X
+2495(Systems)X
+2725(Research)X
+2974(Group)X
+3153(at)X
+3215(University)X
+3501(of)X
+3570(California,)X
+3861(Berkeley.)X
+
+11 p
+%%Page: 11 11
+8 s 8 xH 0 xS 1 f
+10 s
+3 f
+555 630(5.)N
+655(Performance)X
+1 f
+755 753(In)N
+845(this)X
+983(section,)X
+1253(we)X
+1370(present)X
+1625(the)X
+1746(results)X
+1978(of)X
+2067(two)X
+2209(very)X
+2374(different)X
+2673(benchmarks.)X
+3103(The)X
+3250(\256rst)X
+3396(is)X
+3471(an)X
+3569(online)X
+3791(transaction)X
+4165(pro-)X
+555 843(cessing)N
+824(benchmark,)X
+1234(similar)X
+1489(to)X
+1584(the)X
+1715(standard)X
+2020(TPCB,)X
+2272(but)X
+2407(has)X
+2547(been)X
+2732(adapted)X
+3015(to)X
+3110(run)X
+3250(in)X
+3345(a)X
+3414(desktop)X
+3696(environment.)X
+4174(The)X
+555 933(second)N
+798(emulates)X
+1103(a)X
+1159(computer-aided)X
+1683(design)X
+1912(environment)X
+2337(and)X
+2473(provides)X
+2769(more)X
+2954(complex)X
+3250(query)X
+3453(processing.)X
+3 f
+555 1119(5.1.)N
+715(Transaction)X
+1148(Processing)X
+1533(Benchmark)X
+1 f
+755 1242(For)N
+887(this)X
+1023(section,)X
+1291(all)X
+1392(performance)X
+1820(numbers)X
+2117(shown)X
+2346(except)X
+2576(for)X
+2690(the)X
+2808(commercial)X
+3207(database)X
+3504(system)X
+3746(were)X
+3923(obtained)X
+4219(on)X
+555 1332(a)N
+614(DECstation)X
+1009(5000/200)X
+1333(with)X
+1497(32MBytes)X
+1852(of)X
+1941(memory)X
+2230(running)X
+2501(Ultrix)X
+2714(V4.0,)X
+2914(accessing)X
+3244(a)X
+3302(DEC)X
+3484(RZ57)X
+3688(1GByte)X
+3959(disk)X
+4114(drive.)X
+555 1422(The)N
+720(commercial)X
+1139(relational)X
+1482(database)X
+1799(system)X
+2061(tests)X
+2242(were)X
+2438(run)X
+2584(on)X
+2703(a)X
+2778(comparable)X
+3192(machine,)X
+3523(a)X
+3598(Sparcstation)X
+4033(1+)X
+4157(with)X
+555 1512(32MBytes)N
+915(memory)X
+1209(and)X
+1352(a)X
+1415(1GByte)X
+1691(external)X
+1976(disk)X
+2135(drive.)X
+2366(The)X
+2517(database,)X
+2840(binaries)X
+3120(and)X
+3262(log)X
+3390(resided)X
+3648(on)X
+3754(the)X
+3878(same)X
+4069(device.)X
+555 1602(Reported)N
+869(times)X
+1062(are)X
+1181(the)X
+1299(means)X
+1524(of)X
+1611(\256ve)X
+1751(tests)X
+1913(and)X
+2049(have)X
+2221(standard)X
+2513(deviations)X
+2862(within)X
+3086(two)X
+3226(percent)X
+3483(of)X
+3570(the)X
+3688(mean.)X
+755 1725(The)N
+905(test)X
+1041(database)X
+1343(was)X
+1493(con\256gured)X
+1861(according)X
+2203(to)X
+2290(the)X
+2413(TPCB)X
+2637(scaling)X
+2889(rules)X
+3070(for)X
+3189(a)X
+3250(10)X
+3355(transaction)X
+3732(per)X
+3860(second)X
+4108(\(TPS\))X
+555 1815(system)N
+817(with)X
+999(1,000,000)X
+1359(account)X
+1649(records,)X
+1946(100)X
+2106(teller)X
+2311(records,)X
+2607(and)X
+2762(10)X
+2881(branch)X
+3139(records.)X
+3455(Where)X
+3709(TPS)X
+3885(numbers)X
+4200(are)X
+555 1905(reported,)N
+865(we)X
+981(are)X
+1102(running)X
+1373(a)X
+1431(modi\256ed)X
+1737(version)X
+1995(of)X
+2084(the)X
+2203(industry)X
+2486(standard)X
+2779(transaction)X
+3152(processing)X
+3516(benchmark,)X
+3914(TPCB.)X
+4174(The)X
+555 1995(TPCB)N
+780(benchmark)X
+1163(simulates)X
+1491(a)X
+1553(withdrawal)X
+1940(performed)X
+2301(by)X
+2407(a)X
+2469(hypothetical)X
+2891(teller)X
+3082(at)X
+3166(a)X
+3228(hypothetical)X
+3650(bank.)X
+3872(The)X
+4022(database)X
+555 2085(consists)N
+831(of)X
+921(relations)X
+1220(\(\256les\))X
+1430(for)X
+1547(accounts,)X
+1871(branches,)X
+2200(tellers,)X
+2439(and)X
+2578(history.)X
+2863(For)X
+2997(each)X
+3168(transaction,)X
+3563(the)X
+3684(account,)X
+3976(teller,)X
+4183(and)X
+555 2175(branch)N
+795(balances)X
+1093(must)X
+1269(be)X
+1366(updated)X
+1641(to)X
+1724(re\257ect)X
+1946(the)X
+2065(withdrawal)X
+2447(and)X
+2584(a)X
+2640(history)X
+2882(record)X
+3108(is)X
+3181(written)X
+3428(which)X
+3644(contains)X
+3931(the)X
+4049(account)X
+555 2265(id,)N
+657(branch)X
+896(id,)X
+998(teller)X
+1183(id,)X
+1285(and)X
+1421(the)X
+1539(amount)X
+1799(of)X
+1886(the)X
+2004(withdrawal)X
+2385([TPCB90].)X
+755 2388(Our)N
+914(implementation)X
+1450(of)X
+1551(the)X
+1683(benchmark)X
+2074(differs)X
+2317(from)X
+2506(the)X
+2637(speci\256cation)X
+3075(in)X
+3170(several)X
+3431(aspects.)X
+3736(The)X
+3894(speci\256cation)X
+555 2478(requires)N
+840(that)X
+985(the)X
+1108(database)X
+1410(keep)X
+1587(redundant)X
+1933(logs)X
+2091(on)X
+2196(different)X
+2498(devices,)X
+2784(but)X
+2911(we)X
+3030(use)X
+3162(a)X
+3223(single)X
+3439(log.)X
+3606(Furthermore,)X
+4052(all)X
+4157(tests)X
+555 2568(were)N
+734(run)X
+863(on)X
+965(a)X
+1023(single,)X
+1256(centralized)X
+1631(system)X
+1875(so)X
+1968(there)X
+2151(is)X
+2226(no)X
+2328(notion)X
+2553(of)X
+2641(remote)X
+2885(accesses.)X
+3219(Finally,)X
+3486(we)X
+3601(calculated)X
+3948(throughput)X
+555 2658(by)N
+662(dividing)X
+955(the)X
+1080(total)X
+1249(elapsed)X
+1517(time)X
+1686(by)X
+1793(the)X
+1918(number)X
+2190(of)X
+2284(transactions)X
+2694(processed)X
+3038(rather)X
+3253(than)X
+3418(by)X
+3525(computing)X
+3894(the)X
+4018(response)X
+555 2748(time)N
+717(for)X
+831(each)X
+999(transaction.)X
+755 2871(The)N
+912(performance)X
+1351(comparisons)X
+1788(focus)X
+1993(on)X
+2104(traditional)X
+2464(Unix)X
+2655(techniques)X
+3029(\(unprotected,)X
+3486(using)X
+3 f
+3690(\257ock)X
+1 f
+3854(\(2\))X
+3979(and)X
+4126(using)X
+3 f
+555 2961(fsync)N
+1 f
+733(\(2\)\))X
+884(and)X
+1030(a)X
+1096(commercial)X
+1504(relational)X
+1836(database)X
+2142(system.)X
+2433(Well-behaved)X
+2913(applications)X
+3329(using)X
+3 f
+3531(\257ock)X
+1 f
+3695(\(2\))X
+3818(are)X
+3946(guaranteed)X
+555 3051(that)N
+704(concurrent)X
+1077(processes')X
+1441(updates)X
+1715(do)X
+1824(not)X
+1955(interact)X
+2225(with)X
+2396(one)X
+2541(another,)X
+2831(but)X
+2962(no)X
+3070(guarantees)X
+3442(about)X
+3648(atomicity)X
+3978(are)X
+4105(made.)X
+555 3141(That)N
+731(is,)X
+833(if)X
+911(the)X
+1038(system)X
+1289(crashes)X
+1555(in)X
+1646(mid-transaction,)X
+2198(only)X
+2369(parts)X
+2554(of)X
+2649(that)X
+2797(transaction)X
+3177(will)X
+3329(be)X
+3433(re\257ected)X
+3738(in)X
+3828(the)X
+3954 0.3125(after-crash)AX
+555 3231(state)N
+725(of)X
+815(the)X
+936(database.)X
+1276(The)X
+1424(use)X
+1554(of)X
+3 f
+1643(fsync)X
+1 f
+1821(\(2\))X
+1937(at)X
+2017(transaction)X
+2391(commit)X
+2657(time)X
+2821(provides)X
+3119(guarantees)X
+3485(of)X
+3574(durability)X
+3907(after)X
+4077(system)X
+555 3321(failure.)N
+825(However,)X
+1160(there)X
+1341(is)X
+1414(no)X
+1514(mechanism)X
+1899(to)X
+1981(perform)X
+2260(transaction)X
+2632(abort.)X
+3 f
+555 3507(5.1.1.)N
+775(Single-User)X
+1191(Tests)X
+1 f
+755 3630(These)N
+978(tests)X
+1151(compare)X
+1459(LIBTP)X
+1712(in)X
+1804(a)X
+1870(variety)X
+2123(of)X
+2220(con\256gurations)X
+2708(to)X
+2800(traditional)X
+3159(UNIX)X
+3390(solutions)X
+3708(and)X
+3854(a)X
+3920(commercial)X
+555 3720(relational)N
+884(database)X
+1187(system)X
+1435(\(RDBMS\).)X
+1814(To)X
+1929(demonstrate)X
+2347(the)X
+2471(server)X
+2694(architecture)X
+3100(we)X
+3220(built)X
+3392(a)X
+3454(front)X
+3636(end)X
+3777(test)X
+3913(process)X
+4179(that)X
+555 3810(uses)N
+732(TCL)X
+922([OUST90])X
+1304(to)X
+1405(parse)X
+1614(database)X
+1930(access)X
+2175(commands)X
+2561(and)X
+2716(call)X
+2870(the)X
+3006(database)X
+3321(access)X
+3565(routines.)X
+3901(In)X
+4006(one)X
+4160(case)X
+555 3900(\(SERVER\),)N
+956(frontend)X
+1249(and)X
+1386(backend)X
+1675(processes)X
+2004(were)X
+2181(created)X
+2434(which)X
+2650(communicated)X
+3142(via)X
+3260(an)X
+3356(IP)X
+3447(socket.)X
+3712(In)X
+3799(the)X
+3917(second)X
+4160(case)X
+555 3990(\(TCL\),)N
+802(a)X
+860(single)X
+1073(process)X
+1336(read)X
+1497(queries)X
+1751(from)X
+1929(standard)X
+2223(input,)X
+2429(parsed)X
+2660(them,)X
+2861(and)X
+2998(called)X
+3211(the)X
+3330(database)X
+3628(access)X
+3855(routines.)X
+4174(The)X
+555 4080(performance)N
+987(difference)X
+1338(between)X
+1630(the)X
+1752(TCL)X
+1927(and)X
+2067(SERVER)X
+2397(tests)X
+2563(quanti\256es)X
+2898(the)X
+3020(communication)X
+3542(overhead)X
+3861(of)X
+3952(the)X
+4074(socket.)X
+555 4170(The)N
+732(RDBMS)X
+1063(implementation)X
+1617(used)X
+1816(embedded)X
+2198(SQL)X
+2401(in)X
+2515(C)X
+2620(with)X
+2814(stored)X
+3062(database)X
+3391(procedures.)X
+3835(Therefore,)X
+4224(its)X
+555 4260(con\256guration)N
+1003(is)X
+1076(a)X
+1132(hybrid)X
+1361(of)X
+1448(the)X
+1566(single)X
+1777(process)X
+2038(architecture)X
+2438(and)X
+2574(the)X
+2692(server)X
+2909(architecture.)X
+3349(The)X
+3494(graph)X
+3697(in)X
+3779(\256gure)X
+3986(six)X
+4099(shows)X
+555 4350(a)N
+611(comparison)X
+1005(of)X
+1092(the)X
+1210(following)X
+1541(six)X
+1654(con\256gurations:)X
+1126 4506(LIBTP)N
+1552(Uses)X
+1728(the)X
+1846(LIBTP)X
+2088(library)X
+2322(in)X
+2404(a)X
+2460(single)X
+2671(application.)X
+1126 4596(TCL)N
+1552(Uses)X
+1728(the)X
+1846(LIBTP)X
+2088(library)X
+2322(in)X
+2404(a)X
+2460(single)X
+2671(application,)X
+3067(requires)X
+3346(query)X
+3549(parsing.)X
+1126 4686(SERVER)N
+1552(Uses)X
+1728(the)X
+1846(LIBTP)X
+2088(library)X
+2322(in)X
+2404(a)X
+2460(server)X
+2677(con\256guration,)X
+3144(requires)X
+3423(query)X
+3626(parsing.)X
+1126 4776(NOTP)N
+1552(Uses)X
+1728(no)X
+1828(locking,)X
+2108(logging,)X
+2392(or)X
+2479(concurrency)X
+2897(control.)X
+1126 4866(FLOCK)N
+1552(Uses)X
+3 f
+1728(\257ock)X
+1 f
+1892(\(2\))X
+2006(for)X
+2120(concurrency)X
+2538(control)X
+2785(and)X
+2921(nothing)X
+3185(for)X
+3299(durability.)X
+1126 4956(FSYNC)N
+1552(Uses)X
+3 f
+1728(fsync)X
+1 f
+1906(\(2\))X
+2020(for)X
+2134(durability)X
+2465(and)X
+2601(nothing)X
+2865(for)X
+2979(concurrency)X
+3397(control.)X
+1126 5046(RDBMS)N
+1552(Uses)X
+1728(a)X
+1784(commercial)X
+2183(relational)X
+2506(database)X
+2803(system.)X
+755 5235(The)N
+902(results)X
+1133(show)X
+1324(that)X
+1466(LIBTP,)X
+1730(both)X
+1894(in)X
+1978(the)X
+2098(procedural)X
+2464(and)X
+2602(parsed)X
+2834(environments,)X
+3312(is)X
+3387(competitive)X
+3787(with)X
+3951(a)X
+4009(commer-)X
+555 5325(cial)N
+692(system)X
+935(\(comparing)X
+1326(LIBTP,)X
+1589(TCL,)X
+1781(and)X
+1917(RDBMS\).)X
+2263(Compared)X
+2617(to)X
+2699(existing)X
+2972(UNIX)X
+3193(solutions,)X
+3521(LIBTP)X
+3763(is)X
+3836(approximately)X
+555 5415(15%)N
+738(slower)X
+988(than)X
+1162(using)X
+3 f
+1371(\257ock)X
+1 f
+1535(\(2\))X
+1665(or)X
+1768(no)X
+1884(protection)X
+2245(but)X
+2383(over)X
+2562(80%)X
+2745(better)X
+2964(than)X
+3137(using)X
+3 f
+3345(fsync)X
+1 f
+3523(\(2\))X
+3652(\(comparing)X
+4057(LIBTP,)X
+555 5505(FLOCK,)N
+857(NOTP,)X
+1106(and)X
+1242(FSYNC\).)X
+
+12 p
+%%Page: 12 12
+10 s 10 xH 0 xS 1 f
+3 f
+8 s
+3500 2184(RDBMS)N
+1 Dt
+3553 2085 MXY
+ 3553 2085 lineto
+ 3676 2085 lineto
+ 3676 1351 lineto
+ 3553 1351 lineto
+ 3553 2085 lineto
+closepath 16 3553 1351 3676 2085 Dp
+2018 2184(SERVER)N
+1720 1168 MXY
+0 917 Dl
+122 0 Dl
+0 -917 Dl
+-122 0 Dl
+1715 2184(TCL)N
+2087 1534 MXY
+ 2087 1534 lineto
+ 2209 1534 lineto
+ 2209 2085 lineto
+ 2087 2085 lineto
+ 2087 1534 lineto
+closepath 12 2087 1534 2209 2085 Dp
+3187 MX
+ 3187 1534 lineto
+ 3309 1534 lineto
+ 3309 2085 lineto
+ 3187 2085 lineto
+ 3187 1534 lineto
+closepath 19 3187 1534 3309 2085 Dp
+3142 2184(FSYNC)N
+2425(NOTP)X
+2453 955 MXY
+ 2453 955 lineto
+ 2576 955 lineto
+ 2576 2085 lineto
+ 2453 2085 lineto
+ 2453 955 lineto
+closepath 21 2453 955 2576 2085 Dp
+2820 1000 MXY
+ 2820 1000 lineto
+ 2942 1000 lineto
+ 2942 2085 lineto
+ 2820 2085 lineto
+ 2820 1000 lineto
+closepath 14 2820 1000 2942 2085 Dp
+5 Dt
+1231 2085 MXY
+2567 0 Dl
+4 Ds
+1 Dt
+1231 1840 MXY
+2567 0 Dl
+1231 1596 MXY
+2567 0 Dl
+1231 1351 MXY
+2567 0 Dl
+1231 1108 MXY
+2567 0 Dl
+1231 863 MXY
+2567 0 Dl
+11 s
+1087 1877(2)N
+1087 1633(4)N
+1087 1388(6)N
+1087 1145(8)N
+1065 900(10)N
+1028 763(TPS)N
+-1 Ds
+1353 2085 MXY
+ 1353 2085 lineto
+ 1353 1151 lineto
+ 1476 1151 lineto
+ 1476 2085 lineto
+ 1353 2085 lineto
+closepath 3 1353 1151 1476 2085 Dp
+8 s
+1318 2184(LIBTP)N
+2767(FLOCK)X
+3 Dt
+-1 Ds
+10 s
+1597 2399(Figure)N
+1844(6:)X
+1931(Single-User)X
+2347(Performance)X
+2814(Comparison.)X
+1 f
+10 f
+555 2579(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+3 f
+555 2855(5.1.2.)N
+775(Multi-User)X
+1174(Tests)X
+1 f
+755 2978(While)N
+975(the)X
+1097(single-user)X
+1473(tests)X
+1639(form)X
+1819(a)X
+1878(basis)X
+2061(for)X
+2178(comparing)X
+2544(LIBTP)X
+2789(to)X
+2874(other)X
+3062(systems,)X
+3358(our)X
+3488(goal)X
+3649(in)X
+3734(multi-user)X
+4086(testing)X
+555 3068(was)N
+714(to)X
+810(analyze)X
+1089(its)X
+1197(scalability.)X
+1579(To)X
+1701(this)X
+1849(end,)X
+2018(we)X
+2145(have)X
+2330(run)X
+2470(the)X
+2601(benchmark)X
+2991(in)X
+3086(three)X
+3280(modes,)X
+3542(the)X
+3673(normal)X
+3933(disk)X
+4099(bound)X
+555 3158(con\256guration)N
+1010(\(\256gure)X
+1252(seven\),)X
+1510(a)X
+1573(CPU)X
+1755(bound)X
+1982(con\256guration)X
+2436(\(\256gure)X
+2677(eight,)X
+2884(READ-ONLY\),)X
+3426(and)X
+3569(lock)X
+3734(contention)X
+4099(bound)X
+555 3248(\(\256gure)N
+796(eight,)X
+1003(NO_FSYNC\).)X
+1510(Since)X
+1715(the)X
+1840(normal)X
+2094(con\256guration)X
+2548(is)X
+2628(completely)X
+3011(disk)X
+3171(bound)X
+3398(\(each)X
+3600(transaction)X
+3978(requires)X
+4263(a)X
+555 3354(random)N
+823(read,)X
+1005(a)X
+1064(random)X
+1332(write,)X
+1540(and)X
+1679(a)X
+1738(sequential)X
+2086(write)X
+7 s
+2251 3322(4)N
+10 s
+3354(\))Y
+2329(we)X
+2446(expect)X
+2679(to)X
+2764(see)X
+2890(little)X
+3059(performance)X
+3489(improvement)X
+3939(as)X
+4028(the)X
+4148(mul-)X
+555 3444(tiprogramming)N
+1064(level)X
+1249(increases.)X
+1613(In)X
+1709(fact,)X
+1879(\256gure)X
+2095(seven)X
+2307(reveals)X
+2564(that)X
+2713(we)X
+2836(are)X
+2964(able)X
+3127(to)X
+3218(overlap)X
+3487(CPU)X
+3670(and)X
+3814(disk)X
+3975(utilization)X
+555 3534(slightly)N
+825(producing)X
+1181(approximately)X
+1674(a)X
+1740(10%)X
+1917(performance)X
+2354(improvement)X
+2811(with)X
+2983(two)X
+3133(processes.)X
+3511(After)X
+3711(that)X
+3861(point,)X
+4075(perfor-)X
+555 3624(mance)N
+785(drops)X
+983(off,)X
+1117(and)X
+1253(at)X
+1331(a)X
+1387(multi-programming)X
+2038(level)X
+2214(of)X
+2301(4,)X
+2381(we)X
+2495(are)X
+2614(performing)X
+2995(worse)X
+3207(than)X
+3365(in)X
+3447(the)X
+3565(single)X
+3776(process)X
+4037(case.)X
+755 3747(Similar)N
+1021(behavior)X
+1333(was)X
+1489(reported)X
+1787(on)X
+1897(the)X
+2025(commercial)X
+2434(relational)X
+2767(database)X
+3074(system)X
+3326(using)X
+3529(the)X
+3657(same)X
+3852(con\256guration.)X
+555 3837(The)N
+707(important)X
+1045(conclusion)X
+1419(to)X
+1508(draw)X
+1696(from)X
+1879(this)X
+2021(is)X
+2101(that)X
+2248(you)X
+2395(cannot)X
+2636(attain)X
+2841(good)X
+3028(multi-user)X
+3384(scaling)X
+3638(on)X
+3745(a)X
+3808(badly)X
+4013(balanced)X
+555 3927(system.)N
+839(If)X
+915(multi-user)X
+1266(performance)X
+1695(on)X
+1797(applications)X
+2205(of)X
+2293(this)X
+2429(sort)X
+2570(is)X
+2644(important,)X
+2996(one)X
+3133(must)X
+3309(have)X
+3482(a)X
+3539(separate)X
+3824(logging)X
+4089(device)X
+555 4017(and)N
+697(horizontally)X
+1110(partition)X
+1407(the)X
+1531(database)X
+1834(to)X
+1921(allow)X
+2124(a)X
+2185(suf\256ciently)X
+2570(high)X
+2737(degree)X
+2977(of)X
+3069(multiprogramming)X
+3698(that)X
+3843(group)X
+4055(commit)X
+555 4107(can)N
+687(amortize)X
+988(the)X
+1106(cost)X
+1255(of)X
+1342(log)X
+1464(\257ushing.)X
+755 4230(By)N
+871(using)X
+1067(a)X
+1126(very)X
+1292(small)X
+1488(database)X
+1788(\(one)X
+1954(that)X
+2097(can)X
+2232(be)X
+2331(entirely)X
+2599(cached)X
+2846(in)X
+2930(main)X
+3112(memory\))X
+3428(and)X
+3566(read-only)X
+3896(transactions,)X
+555 4320(we)N
+670(generated)X
+1004(a)X
+1061(CPU)X
+1236(bound)X
+1456(environment.)X
+1921(By)X
+2034(using)X
+2227(the)X
+2345(same)X
+2530(small)X
+2723(database,)X
+3040(the)X
+3158(complete)X
+3472(TPCB)X
+3691(transaction,)X
+4083(and)X
+4219(no)X
+3 f
+555 4410(fsync)N
+1 f
+733(\(2\))X
+862(on)X
+977(the)X
+1110(log)X
+1247(at)X
+1340(commit,)X
+1639(we)X
+1768(created)X
+2036(a)X
+2107(lock)X
+2280(contention)X
+2652(bound)X
+2886(environment.)X
+3365(The)X
+3524(small)X
+3731(database)X
+4042(used)X
+4223(an)X
+555 4500(account)N
+828(\256le)X
+953(containing)X
+1314(only)X
+1479(1000)X
+1662(records)X
+1922(rather)X
+2133(than)X
+2294(the)X
+2415(full)X
+2549(1,000,000)X
+2891(records)X
+3150(and)X
+3288(ran)X
+3413(enough)X
+3671(transactions)X
+4076(to)X
+4160(read)X
+555 4590(the)N
+677(entire)X
+883(database)X
+1183(into)X
+1330(the)X
+1451(buffer)X
+1671(pool)X
+1836(\(2000\))X
+2073(before)X
+2302(beginning)X
+2645(measurements.)X
+3147(The)X
+3295(read-only)X
+3626(transaction)X
+4001(consisted)X
+555 4680(of)N
+646(three)X
+831(database)X
+1132(reads)X
+1326(\(from)X
+1533(the)X
+1655(1000)X
+1839(record)X
+2069(account)X
+2343(\256le,)X
+2489(the)X
+2611(100)X
+2754(record)X
+2983(teller)X
+3171(\256le,)X
+3316(and)X
+3455(the)X
+3576(10)X
+3679(record)X
+3908(branch)X
+4150(\256le\).)X
+555 4770(Since)N
+759(no)X
+865(data)X
+1025(were)X
+1208(modi\256ed)X
+1518(and)X
+1660(no)X
+1766(history)X
+2014(records)X
+2277(were)X
+2460(written,)X
+2733(no)X
+2839(log)X
+2966(records)X
+3228(were)X
+3410(written.)X
+3702(For)X
+3838(the)X
+3961(contention)X
+555 4860(bound)N
+780(con\256guration,)X
+1252(we)X
+1371(used)X
+1543(the)X
+1666(normal)X
+1918(TPCB)X
+2142(transaction)X
+2519(\(against)X
+2798(the)X
+2920(small)X
+3117(database\))X
+3445(and)X
+3585(disabled)X
+3876(the)X
+3998(log)X
+4124(\257ush.)X
+555 4950(Figure)N
+784(eight)X
+964(shows)X
+1184(both)X
+1346(of)X
+1433(these)X
+1618(results.)X
+755 5073(The)N
+902(read-only)X
+1231(test)X
+1363(indicates)X
+1669(that)X
+1810(we)X
+1925(barely)X
+2147(scale)X
+2329(at)X
+2408(all)X
+2509(in)X
+2592(the)X
+2711(CPU)X
+2887(bound)X
+3108(case.)X
+3308(The)X
+3454(explanation)X
+3849(for)X
+3964(that)X
+4105(is)X
+4179(that)X
+555 5163(even)N
+735(with)X
+905(a)X
+969(single)X
+1188(process,)X
+1477(we)X
+1599(are)X
+1726(able)X
+1888(to)X
+1978(drive)X
+2171(the)X
+2297(CPU)X
+2480(utilization)X
+2832(to)X
+2922(96%.)X
+3137(As)X
+3254(a)X
+3317(result,)X
+3542(that)X
+3689(gives)X
+3885(us)X
+3983(very)X
+4153(little)X
+555 5253(room)N
+753(for)X
+876(improvement,)X
+1352(and)X
+1497(it)X
+1570(takes)X
+1764(a)X
+1829(multiprogramming)X
+2462(level)X
+2647(of)X
+2743(four)X
+2906(to)X
+2997(approach)X
+3321(100%)X
+3537(CPU)X
+3721(saturation.)X
+4106(In)X
+4201(the)X
+555 5343(case)N
+718(where)X
+939(we)X
+1057(do)X
+1161(perform)X
+1444(writes,)X
+1684(we)X
+1802(are)X
+1925(interested)X
+2261(in)X
+2347(detecting)X
+2665(when)X
+2863(lock)X
+3025(contention)X
+3387(becomes)X
+3691(a)X
+3750(dominant)X
+4075(perfor-)X
+555 5433(mance)N
+787(factor.)X
+1037(Contention)X
+1414(will)X
+1560(cause)X
+1761(two)X
+1903(phenomena;)X
+2317(we)X
+2433(will)X
+2579(see)X
+2704(transactions)X
+3109(queueing)X
+3425(behind)X
+3665(frequently)X
+4017(accessed)X
+555 5523(data,)N
+731(and)X
+869(we)X
+985(will)X
+1131(see)X
+1256(transaction)X
+1629(abort)X
+1815(rates)X
+1988(increasing)X
+2339(due)X
+2476(to)X
+2559(deadlock.)X
+2910(Given)X
+3127(that)X
+3268(the)X
+3387(branch)X
+3627(\256le)X
+3750(contains)X
+4038(only)X
+4201(ten)X
+8 s
+10 f
+555 5595(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)N
+5 s
+1 f
+727 5673(4)N
+8 s
+763 5698(Although)N
+1021(the)X
+1115(log)X
+1213(is)X
+1272(written)X
+1469(sequentially,)X
+1810(we)X
+1900(do)X
+1980(not)X
+2078(get)X
+2172(the)X
+2266(bene\256t)X
+2456(of)X
+2525(sequentiality)X
+2868(since)X
+3015(the)X
+3109(log)X
+3207(and)X
+3315(database)X
+3550(reside)X
+3718(on)X
+3798(the)X
+3892(same)X
+4039(disk.)X
+
+13 p
+%%Page: 13 13
+8 s 8 xH 0 xS 1 f
+10 s
+3 f
+1 f
+3187 2051 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3286 2028 MXY
+0 17 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3384 1926 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3483 1910 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3581 1910 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3680 1832 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3778 1909 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3877 1883 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3975 1679 MXY
+0 17 Dl
+0 -8 Dl
+9 0 Dl
+-18 0 Dl
+4074 1487 MXY
+0 17 Dl
+0 -8 Dl
+9 0 Dl
+-18 0 Dl
+5 Dt
+3187 2060 MXY
+99 -24 Dl
+98 -101 Dl
+99 -16 Dl
+98 0 Dl
+99 -78 Dl
+98 77 Dl
+99 -26 Dl
+98 -204 Dl
+99 -192 Dl
+3 f
+6 s
+4088 1516(SMALL)N
+3 Dt
+3187 2051 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3286 2051 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3384 2041 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3483 1990 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3581 1843 MXY
+0 17 Dl
+0 -8 Dl
+9 0 Dl
+-18 0 Dl
+3680 1578 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3778 1496 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3877 1430 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+3975 1269 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+4074 1070 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1 Dt
+3187 2060 MXY
+99 0 Dl
+98 -10 Dl
+99 -51 Dl
+98 -147 Dl
+99 -265 Dl
+98 -82 Dl
+99 -66 Dl
+98 -161 Dl
+99 -199 Dl
+4088 1099(LARGE)N
+5 Dt
+3089 2060 MXY
+985 0 Dl
+3089 MX
+0 -1174 Dl
+4 Ds
+1 Dt
+3581 2060 MXY
+0 -1174 Dl
+4074 2060 MXY
+0 -1174 Dl
+3089 1825 MXY
+985 0 Dl
+9 s
+2993 1855(25)N
+3089 1591 MXY
+985 0 Dl
+2993 1621(50)N
+3089 1356 MXY
+985 0 Dl
+2993 1386(75)N
+3089 1121 MXY
+985 0 Dl
+2957 1151(100)N
+3089 886 MXY
+985 0 Dl
+2957 916(125)N
+3281 2199(Multiprogramming)N
+3071 2152(0)N
+3569(5)X
+4038(10)X
+2859 787(Aborts)N
+3089(per)X
+3211(500)X
+2901 847(transactions)N
+-1 Ds
+3 Dt
+2037 1342 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2125 1358 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2213 1341 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2301 1191 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2388 1124 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-17 0 Dl
+2476 1157 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2564 1157 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2652 1161 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2740 1153 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2828 1150 MXY
+0 18 Dl
+0 -9 Dl
+8 0 Dl
+-17 0 Dl
+5 Dt
+2037 1351 MXY
+88 16 Dl
+88 -17 Dl
+88 -150 Dl
+87 -67 Dl
+88 33 Dl
+88 0 Dl
+88 4 Dl
+88 -8 Dl
+88 -3 Dl
+6 s
+2685 1234(READ-ONLY)N
+3 Dt
+2037 1464 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2125 1640 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2213 1854 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2301 1872 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2388 1871 MXY
+0 17 Dl
+0 -9 Dl
+9 0 Dl
+-17 0 Dl
+2476 1933 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2564 1914 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2652 1903 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2740 1980 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+2828 2004 MXY
+0 18 Dl
+0 -9 Dl
+8 0 Dl
+-17 0 Dl
+1 Dt
+2037 1473 MXY
+88 176 Dl
+88 214 Dl
+88 18 Dl
+87 -2 Dl
+88 63 Dl
+88 -19 Dl
+88 -11 Dl
+88 77 Dl
+88 24 Dl
+2759 1997(NO-FSYNC)N
+5 Dt
+1949 2060 MXY
+879 0 Dl
+1949 MX
+0 -1174 Dl
+4 Ds
+1 Dt
+2388 2060 MXY
+0 -1174 Dl
+2828 2060 MXY
+0 -1174 Dl
+1949 1825 MXY
+879 0 Dl
+9 s
+1842 1855(40)N
+1949 1591 MXY
+879 0 Dl
+1842 1621(80)N
+1949 1356 MXY
+879 0 Dl
+1806 1386(120)N
+1949 1121 MXY
+879 0 Dl
+1806 1151(160)N
+1949 886 MXY
+879 0 Dl
+1806 916(200)N
+2088 2199(Multiprogramming)N
+1844 863(in)N
+1922(TPS)X
+1761 792(Throughput)N
+1931 2121(0)N
+2370 2133(5)N
+2792(10)X
+6 s
+1679 1833(LIBTP)N
+-1 Ds
+3 Dt
+837 1019 MXY
+0 17 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+929 878 MXY
+0 17 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1021 939 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1113 1043 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1205 1314 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1297 1567 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1389 1665 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1481 1699 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1573 1828 MXY
+0 18 Dl
+0 -9 Dl
+9 0 Dl
+-18 0 Dl
+1665 1804 MXY
+0 18 Dl
+0 -9 Dl
+8 0 Dl
+-17 0 Dl
+5 Dt
+837 1027 MXY
+92 -141 Dl
+92 62 Dl
+92 104 Dl
+92 271 Dl
+92 253 Dl
+92 98 Dl
+92 34 Dl
+92 129 Dl
+92 -24 Dl
+745 2060 MXY
+920 0 Dl
+745 MX
+0 -1174 Dl
+4 Ds
+1 Dt
+1205 2060 MXY
+0 -1174 Dl
+1665 2060 MXY
+0 -1174 Dl
+745 1766 MXY
+920 0 Dl
+9 s
+673 1796(3)N
+745 1473 MXY
+920 0 Dl
+673 1503(5)N
+745 1180 MXY
+920 0 Dl
+673 1210(8)N
+745 886 MXY
+920 0 Dl
+637 916(10)N
+905 2199(Multiprogramming)N
+622 851(in)N
+700(TPS)X
+575 792(Throughput)N
+733 2152(0)N
+1196(5)X
+1629(10)X
+3 Dt
+-1 Ds
+8 s
+655 2441(Figure)N
+872(7:)X
+960(Multi-user)X
+1286(Performance.)X
+1 f
+655 2531(Since)N
+825(the)X
+931(con\256guration)X
+1300(is)X
+1371(completely)X
+655 2621(disk)N
+790(bound,)X
+994(we)X
+1096(see)X
+1204(only)X
+1345(a)X
+1400(small)X
+1566(im-)X
+655 2711(provement)N
+964(by)X
+1064(adding)X
+1274(a)X
+1337(second)X
+1549(pro-)X
+655 2801(cess.)N
+849(Adding)X
+1081(any)X
+1213(more)X
+1383(concurrent)X
+655 2891(processes)N
+935(causes)X
+1137(performance)X
+1493(degra-)X
+655 2981(dation.)N
+3 f
+1927 2441(Figure)N
+2149(8:)X
+2243(Multi-user)X
+2574(Performance)X
+1927 2531(on)N
+2021(a)X
+2079(small)X
+2251(database.)X
+1 f
+2551(With)X
+2704(one)X
+2821(pro-)X
+1927 2621(cess,)N
+2075(we)X
+2174(are)X
+2276(driving)X
+2486(the)X
+2589(CPU)X
+2739(at)X
+2810(96%)X
+1927 2711(utilization)N
+2215(leaving)X
+2430(little)X
+2575(room)X
+2737(for)X
+2838(im-)X
+1927 2801(provement)N
+2238(as)X
+2328(the)X
+2443(multiprogramming)X
+1927 2891(level)N
+2091(increases.)X
+2396(In)X
+2489(the)X
+2607(NO-FSYNC)X
+1927 2981(case,)N
+2076(lock)X
+2209(contention)X
+2502(degrades)X
+2751(perfor-)X
+1927 3071(mance)N
+2117(as)X
+2194(soon)X
+2339(as)X
+2416(a)X
+2468(second)X
+2669(process)X
+2884(is)X
+1927 3161(added.)N
+3 f
+3199 2441(Figure)N
+3405(9:)X
+3482(Abort)X
+3669(rates)X
+3827(on)X
+3919(the)X
+4028(TPCB)X
+3199 2531(Benchmark.)N
+1 f
+3589(The)X
+3726(abort)X
+3895(rate)X
+4028(climbs)X
+3199 2621(more)N
+3366(quickly)X
+3594(for)X
+3704(the)X
+3818(large)X
+3980(database)X
+3199 2711(test)N
+3324(since)X
+3491(processes)X
+3771(are)X
+3884(descheduled)X
+3199 2801(more)N
+3409(frequently,)X
+3766(allowing)X
+4068(more)X
+3199 2891(processes)N
+3459(to)X
+3525(vie)X
+3619(for)X
+3709(the)X
+3803(same)X
+3950(locks.)X
+10 s
+10 f
+555 3284(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+1 f
+555 3560(records,)N
+835(we)X
+952(expect)X
+1185(contention)X
+1546(to)X
+1631(become)X
+1904(a)X
+1963(factor)X
+2174(quickly)X
+2437(and)X
+2576(the)X
+2697(NO-FSYNC)X
+3120(line)X
+3263(in)X
+3348(\256gure)X
+3557(eight)X
+3739(demonstrates)X
+4184(this)X
+555 3650(dramatically.)N
+1022(Each)X
+1209(additional)X
+1555(process)X
+1822(causes)X
+2058(both)X
+2226(more)X
+2417(waiting)X
+2682(and)X
+2823(more)X
+3013(deadlocking.)X
+3470(Figure)X
+3704(nine)X
+3867(shows)X
+4092(that)X
+4237(in)X
+555 3740(the)N
+681(small)X
+882(database)X
+1187(case)X
+1353(\(SMALL\),)X
+1725(waiting)X
+1992(is)X
+2072(the)X
+2197(dominant)X
+2526(cause)X
+2732(of)X
+2826(declining)X
+3151(performance)X
+3585(\(the)X
+3737(number)X
+4009(of)X
+4103(aborts)X
+555 3830(increases)N
+878(less)X
+1026(steeply)X
+1281(than)X
+1447(the)X
+1573(performance)X
+2008(drops)X
+2214(off)X
+2336(in)X
+2426(\256gure)X
+2641(eight\),)X
+2876(while)X
+3082(in)X
+3172(the)X
+3298(large)X
+3487(database)X
+3792(case)X
+3958(\(LARGE\),)X
+555 3920(deadlocking)N
+967(contributes)X
+1343(more)X
+1528(to)X
+1610(the)X
+1728(declining)X
+2046(performance.)X
+755 4043(Deadlocks)N
+1116(are)X
+1237(more)X
+1424(likely)X
+1628(to)X
+1712(occur)X
+1913(in)X
+1997(the)X
+2116(LARGE)X
+2404(test)X
+2536(than)X
+2695(in)X
+2778(the)X
+2897(SMALL)X
+3189(test)X
+3321(because)X
+3597(there)X
+3779(are)X
+3899(more)X
+4085(oppor-)X
+555 4133(tunities)N
+814(to)X
+900(wait.)X
+1082(In)X
+1173(the)X
+1295(SMALL)X
+1590(case,)X
+1773(processes)X
+2105(never)X
+2307(do)X
+2410(I/O)X
+2540(and)X
+2679(are)X
+2801(less)X
+2944(likely)X
+3149(to)X
+3234(be)X
+3333(descheduled)X
+3753(during)X
+3985(a)X
+4044(transac-)X
+555 4223(tion.)N
+740(In)X
+828(the)X
+947(LARGE)X
+1235(case,)X
+1415(processes)X
+1744(will)X
+1889(frequently)X
+2240(be)X
+2337(descheduled)X
+2755(since)X
+2941(they)X
+3100(have)X
+3273(to)X
+3356(perform)X
+3636(I/O.)X
+3804(This)X
+3967(provides)X
+4263(a)X
+555 4313(window)N
+837(where)X
+1058(a)X
+1118(second)X
+1365(process)X
+1630(can)X
+1766(request)X
+2022(locks)X
+2215(on)X
+2318(already)X
+2578(locked)X
+2815(pages,)X
+3041(thus)X
+3197(increasing)X
+3550(the)X
+3671(likelihood)X
+4018(of)X
+4108(build-)X
+555 4403(ing)N
+677(up)X
+777(long)X
+939(chains)X
+1164(of)X
+1251(waiting)X
+1511(processes.)X
+1879(Eventually,)X
+2266(this)X
+2401(leads)X
+2586(to)X
+2668(deadlock.)X
+3 f
+555 4589(5.2.)N
+715(The)X
+868(OO1)X
+1052(Benchmark)X
+1 f
+755 4712(The)N
+903(TPCB)X
+1125(benchmark)X
+1505(described)X
+1836(in)X
+1921(the)X
+2042(previous)X
+2341(section)X
+2591(measures)X
+2913(performance)X
+3343(under)X
+3549(a)X
+3608(conventional)X
+4044(transac-)X
+555 4802(tion)N
+706(processing)X
+1076(workload.)X
+1446(Other)X
+1656(application)X
+2039(domains,)X
+2357(such)X
+2531(as)X
+2625(computer-aided)X
+3156(design,)X
+3412(have)X
+3591(substantially)X
+4022(different)X
+555 4892(access)N
+786(patterns.)X
+1105(In)X
+1197(order)X
+1392(to)X
+1479(measure)X
+1772(the)X
+1895(performance)X
+2327(of)X
+2418(LIBTP)X
+2664(under)X
+2871(workloads)X
+3229(of)X
+3320(this)X
+3459(type,)X
+3641(we)X
+3759(implemented)X
+4201(the)X
+555 4982(OO1)N
+731(benchmark)X
+1108(described)X
+1436(in)X
+1518([CATT91].)X
+755 5105(The)N
+908(database)X
+1213(models)X
+1472(a)X
+1535(set)X
+1651(of)X
+1745(electronics)X
+2120(components)X
+2534(with)X
+2703(connections)X
+3113(among)X
+3358(them.)X
+3585(One)X
+3746(table)X
+3929(stores)X
+4143(parts)X
+555 5195(and)N
+696(another)X
+962(stores)X
+1174(connections.)X
+1622(There)X
+1835(are)X
+1959(three)X
+2145(connections)X
+2552(originating)X
+2927(at)X
+3009(any)X
+3149(given)X
+3351(part.)X
+3540(Ninety)X
+3782(percent)X
+4043(of)X
+4134(these)X
+555 5285(connections)N
+960(are)X
+1081(to)X
+1165(nearby)X
+1406(parts)X
+1584(\(those)X
+1802(with)X
+1966(nearby)X
+2 f
+2207(ids)X
+1 f
+2300(\))X
+2348(to)X
+2431(model)X
+2652(the)X
+2771(spatial)X
+3001(locality)X
+3262(often)X
+3448(exhibited)X
+3767(in)X
+3850(CAD)X
+4040(applica-)X
+555 5375(tions.)N
+779(Ten)X
+933(percent)X
+1198(of)X
+1293(the)X
+1419(connections)X
+1830(are)X
+1957(randomly)X
+2292(distributed)X
+2662(among)X
+2908(all)X
+3016(other)X
+3209(parts)X
+3393(in)X
+3483(the)X
+3609(database.)X
+3954(Every)X
+4174(part)X
+555 5465(appears)N
+829(exactly)X
+1089(three)X
+1278(times)X
+1479(in)X
+1569(the)X
+2 f
+1695(from)X
+1 f
+1874(\256eld)X
+2043(of)X
+2137(a)X
+2200(connection)X
+2579(record,)X
+2832(and)X
+2975(zero)X
+3141(or)X
+3235(more)X
+3427(times)X
+3627(in)X
+3716(the)X
+2 f
+3841(to)X
+1 f
+3930(\256eld.)X
+4139(Parts)X
+555 5555(have)N
+2 f
+727(x)X
+1 f
+783(and)X
+2 f
+919(y)X
+1 f
+975(locations)X
+1284(set)X
+1393(randomly)X
+1720(in)X
+1802(an)X
+1898(appropriate)X
+2284(range.)X
+
+14 p
+%%Page: 14 14
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+755 630(The)N
+900(intent)X
+1102(of)X
+1189(OO1)X
+1365(is)X
+1438(to)X
+1520(measure)X
+1808(the)X
+1926(overall)X
+2169(cost)X
+2318(of)X
+2405(a)X
+2461(query)X
+2664(mix)X
+2808(characteristic)X
+3257(of)X
+3344(engineering)X
+3743(database)X
+4040(applica-)X
+555 720(tions.)N
+770(There)X
+978(are)X
+1097(three)X
+1278(tests:)X
+10 f
+635 843(g)N
+2 f
+755(Lookup)X
+1 f
+1022(generates)X
+1353(1,000)X
+1560(random)X
+1832(part)X
+2 f
+1984(ids)X
+1 f
+2077(,)X
+2124(fetches)X
+2378(the)X
+2502(corresponding)X
+2987(parts)X
+3169(from)X
+3351(the)X
+3475(database,)X
+3798(and)X
+3940(calls)X
+4113(a)X
+4175(null)X
+755 933(procedure)N
+1097(in)X
+1179(the)X
+1297(host)X
+1450(programming)X
+1906(language)X
+2216(with)X
+2378(the)X
+2496(parts')X
+2 f
+2699(x)X
+1 f
+2755(and)X
+2 f
+2891(y)X
+1 f
+2947(positions.)X
+10 f
+635 1056(g)N
+2 f
+755(Traverse)X
+1 f
+1067(retrieves)X
+1371(a)X
+1434(random)X
+1706(part)X
+1858(from)X
+2041(the)X
+2166(database)X
+2470(and)X
+2613(follows)X
+2880(connections)X
+3290(from)X
+3473(it)X
+3544(to)X
+3632(other)X
+3823(parts.)X
+4045(Each)X
+4232(of)X
+755 1146(those)N
+947(parts)X
+1126(is)X
+1202(retrieved,)X
+1531(and)X
+1670(all)X
+1773(connections)X
+2179(from)X
+2358(it)X
+2424(followed.)X
+2771(This)X
+2935(procedure)X
+3279(is)X
+3354(repeated)X
+3649(depth-\256rst)X
+4000(for)X
+4116(seven)X
+755 1236(hops)N
+930(from)X
+1110(the)X
+1232(original)X
+1505(part,)X
+1674(for)X
+1792(a)X
+1852(total)X
+2018(of)X
+2109(3280)X
+2293(parts.)X
+2513(Backward)X
+2862(traversal)X
+3162(also)X
+3314(exists,)X
+3539(and)X
+3678(follows)X
+3941(all)X
+4044(connec-)X
+755 1326(tions)N
+930(into)X
+1074(a)X
+1130(given)X
+1328(part)X
+1473(to)X
+1555(their)X
+1722(origin.)X
+10 f
+635 1449(g)N
+2 f
+755(Insert)X
+1 f
+962(adds)X
+1129(100)X
+1269(new)X
+1423(parts)X
+1599(and)X
+1735(their)X
+1902(connections.)X
+755 1572(The)N
+913(benchmark)X
+1303(is)X
+1389(single-user,)X
+1794(but)X
+1929(multi-user)X
+2291(access)X
+2530(controls)X
+2821(\(locking)X
+3120(and)X
+3268(transaction)X
+3652(protection\))X
+4036(must)X
+4223(be)X
+555 1662(enforced.)N
+898(It)X
+968(is)X
+1042(designed)X
+1348(to)X
+1431(be)X
+1528(run)X
+1656(on)X
+1757(a)X
+1814(database)X
+2112(with)X
+2275(20,000)X
+2516(parts,)X
+2713(and)X
+2850(on)X
+2951(one)X
+3087(with)X
+3249(200,000)X
+3529(parts.)X
+3745(Because)X
+4033(we)X
+4147(have)X
+555 1752(insuf\256cient)N
+935(disk)X
+1088(space)X
+1287(for)X
+1401(the)X
+1519(larger)X
+1727(database,)X
+2044(we)X
+2158(report)X
+2370(results)X
+2599(only)X
+2761(for)X
+2875(the)X
+2993(20,000)X
+3233(part)X
+3378(database.)X
+3 f
+555 1938(5.2.1.)N
+775(Implementation)X
+1 f
+755 2061(The)N
+920(LIBTP)X
+1182(implementation)X
+1724(of)X
+1831(OO1)X
+2027(uses)X
+2205(the)X
+2342(TCL)X
+2532([OUST90])X
+2914(interface)X
+3235(described)X
+3582(earlier.)X
+3867(The)X
+4031(backend)X
+555 2151(accepts)N
+813(commands)X
+1181(over)X
+1345(an)X
+1442(IP)X
+1534(socket)X
+1760(and)X
+1897(performs)X
+2208(the)X
+2327(requested)X
+2656(database)X
+2954(actions.)X
+3242(The)X
+3387(frontend)X
+3679(opens)X
+3886(and)X
+4022(executes)X
+555 2241(a)N
+618(TCL)X
+796(script.)X
+1041(This)X
+1210(script)X
+1415(contains)X
+1709(database)X
+2013(accesses)X
+2313(interleaved)X
+2697(with)X
+2866(ordinary)X
+3165(program)X
+3463(control)X
+3716(statements.)X
+4120(Data-)X
+555 2331(base)N
+718(commands)X
+1085(are)X
+1204(submitted)X
+1539(to)X
+1621(the)X
+1739(backend)X
+2027(and)X
+2163(results)X
+2392(are)X
+2511(bound)X
+2731(to)X
+2813(program)X
+3105(variables.)X
+755 2454(The)N
+903(parts)X
+1082(table)X
+1261(was)X
+1409(stored)X
+1628(as)X
+1718(a)X
+1776(B-tree)X
+1999(indexed)X
+2275(by)X
+2 f
+2377(id)X
+1 f
+2439(.)X
+2501(The)X
+2648(connection)X
+3022(table)X
+3200(was)X
+3347(stored)X
+3565(as)X
+3654(a)X
+3712(set)X
+3823(of)X
+3912(\256xed-length)X
+555 2544(records)N
+824(using)X
+1029(the)X
+1159(4.4BSD)X
+1446(recno)X
+1657(access)X
+1895(method.)X
+2207(In)X
+2306(addition,)X
+2620(two)X
+2771(B-tree)X
+3003(indices)X
+3261(were)X
+3449(maintained)X
+3836(on)X
+3947(connection)X
+555 2634(table)N
+732(entries.)X
+1007(One)X
+1162(index)X
+1360(mapped)X
+1634(the)X
+2 f
+1752(from)X
+1 f
+1923(\256eld)X
+2085(to)X
+2167(a)X
+2223(connection)X
+2595(record)X
+2821(number,)X
+3106(and)X
+3242(the)X
+3360(other)X
+3545(mapped)X
+3819(the)X
+2 f
+3937(to)X
+1 f
+4019(\256eld)X
+4181(to)X
+4263(a)X
+555 2724(connection)N
+932(record)X
+1163(number.)X
+1473(These)X
+1690(indices)X
+1941(support)X
+2205(fast)X
+2345(lookups)X
+2622(on)X
+2726(connections)X
+3133(in)X
+3219(both)X
+3385(directions.)X
+3765(For)X
+3900(the)X
+4022(traversal)X
+555 2814(tests,)N
+743(the)X
+867(frontend)X
+1165(does)X
+1338(an)X
+1439(index)X
+1642(lookup)X
+1889(to)X
+1976(discover)X
+2273(the)X
+2396(connected)X
+2747(part's)X
+2 f
+2955(id)X
+1 f
+3017(,)X
+3062(and)X
+3203(then)X
+3366(does)X
+3538(another)X
+3804(lookup)X
+4051(to)X
+4138(fetch)X
+555 2904(the)N
+673(part)X
+818(itself.)X
+3 f
+555 3090(5.2.2.)N
+775(Performance)X
+1242(Measurements)X
+1766(for)X
+1889(OO1)X
+1 f
+755 3213(We)N
+888(compare)X
+1186(LIBTP's)X
+1487(OO1)X
+1664(performance)X
+2092(to)X
+2174(that)X
+2314(reported)X
+2602(in)X
+2684([CATT91].)X
+3087(Those)X
+3303(results)X
+3532(were)X
+3709(collected)X
+4019(on)X
+4119(a)X
+4175(Sun)X
+555 3303(3/280)N
+759(\(25)X
+888(MHz)X
+1075(MC68020\))X
+1448(with)X
+1612(16)X
+1714(MBytes)X
+1989(of)X
+2078(memory)X
+2367(and)X
+2505(two)X
+2647(Hitachi)X
+2904(892MByte)X
+3267(disks)X
+3452(\(15)X
+3580(ms)X
+3694(average)X
+3966(seek)X
+4130(time\))X
+555 3393(behind)N
+793(an)X
+889(SMD-4)X
+1149(controller.)X
+1521(Frontends)X
+1861(ran)X
+1984(on)X
+2084(an)X
+2180(8MByte)X
+2462(Sun)X
+2606(3/260.)X
+755 3516(In)N
+844(order)X
+1036(to)X
+1120(measure)X
+1410(performance)X
+1839(on)X
+1941(a)X
+1999(machine)X
+2293(of)X
+2382(roughly)X
+2653(equivalent)X
+3009(processor)X
+3339(power,)X
+3582(we)X
+3698(ran)X
+3822(one)X
+3959(set)X
+4069(of)X
+4157(tests)X
+555 3606(on)N
+666(a)X
+733(standalone)X
+1107(MC68030-based)X
+1671(HP300)X
+1923(\(33MHz)X
+2225(MC68030\).)X
+2646(The)X
+2801(database)X
+3108(was)X
+3263(stored)X
+3489(on)X
+3599(a)X
+3665(300MByte)X
+4037(HP7959)X
+555 3696(SCSI)N
+744(disk)X
+898(\(17)X
+1026(ms)X
+1139(average)X
+1410(seek)X
+1573(time\).)X
+1802(Since)X
+2000(this)X
+2135(machine)X
+2427(is)X
+2500(not)X
+2622(connected)X
+2968(to)X
+3050(a)X
+3106(network,)X
+3409(we)X
+3523(ran)X
+3646(local)X
+3822(tests)X
+3984(where)X
+4201(the)X
+555 3786(frontend)N
+855(and)X
+999(backend)X
+1295(run)X
+1430(on)X
+1538(the)X
+1664(same)X
+1856(machine.)X
+2195(We)X
+2334(compare)X
+2638(these)X
+2830(measurements)X
+3316(with)X
+3485(Cattell's)X
+3783(local)X
+3966(Sun)X
+4117(3/280)X
+555 3876(numbers.)N
+755 3999(Because)N
+1051(the)X
+1177(benchmark)X
+1562(requires)X
+1849(remote)X
+2100(access,)X
+2354(we)X
+2476(ran)X
+2607(another)X
+2876(set)X
+2993(of)X
+3088(tests)X
+3258(on)X
+3365(a)X
+3428(DECstation)X
+3828(5000/200)X
+4157(with)X
+555 4089(32M)N
+732(of)X
+825(memory)X
+1118(running)X
+1393(Ultrix)X
+1610(V4.0)X
+1794(and)X
+1936(a)X
+1998(DEC)X
+2184(1GByte)X
+2459(RZ57)X
+2666(SCSI)X
+2859(disk.)X
+3057(We)X
+3194(compare)X
+3496(the)X
+3619(local)X
+3800(performance)X
+4232(of)X
+555 4179(OO1)N
+734(on)X
+837(the)X
+958(DECstation)X
+1354(to)X
+1439(its)X
+1536(remote)X
+1781(performance.)X
+2250(For)X
+2383(the)X
+2503(remote)X
+2748(case,)X
+2929(we)X
+3045(ran)X
+3170(the)X
+3290(frontend)X
+3584(on)X
+3686(a)X
+3744(DECstation)X
+4139(3100)X
+555 4269(with)N
+717(16)X
+817(MBytes)X
+1090(of)X
+1177(main)X
+1357(memory.)X
+755 4392(The)N
+900(databases)X
+1228(tested)X
+1435(in)X
+1517([CATT91])X
+1880(are)X
+10 f
+635 4515(g)N
+1 f
+755(INDEX,)X
+1045(a)X
+1101(highly-optimized)X
+1672(access)X
+1898(method)X
+2158(package)X
+2442(developed)X
+2792(at)X
+2870(Sun)X
+3014(Microsystems.)X
+10 f
+635 4638(g)N
+1 f
+755(OODBMS,)X
+1137(a)X
+1193(beta)X
+1347(release)X
+1591(of)X
+1678(a)X
+1734(commercial)X
+2133(object-oriented)X
+2639(database)X
+2936(management)X
+3366(system.)X
+10 f
+635 4761(g)N
+1 f
+755(RDBMS,)X
+1076(a)X
+1133(UNIX-based)X
+1565(commercial)X
+1965(relational)X
+2289(data)X
+2444(manager)X
+2742(at)X
+2821(production)X
+3189(release.)X
+3474(The)X
+3620(OO1)X
+3797(implementation)X
+755 4851(used)N
+922(embedded)X
+1272(SQL)X
+1443(in)X
+1525(C.)X
+1638(Stored)X
+1867(procedures)X
+2240(were)X
+2417(de\256ned)X
+2673(to)X
+2755(reduce)X
+2990(client-server)X
+3412(traf\256c.)X
+755 4974(Table)N
+974(two)X
+1130(shows)X
+1366(the)X
+1500(measurements)X
+1995(from)X
+2187([CATT91])X
+2566(and)X
+2718(LIBTP)X
+2976(for)X
+3106(a)X
+3178(local)X
+3370(test)X
+3517(on)X
+3632(the)X
+3765(MC680x0-based)X
+555 5064(hardware.)N
+915(All)X
+1037(caches)X
+1272(are)X
+1391(cleared)X
+1644(before)X
+1870(each)X
+2038(test.)X
+2209(All)X
+2331(times)X
+2524(are)X
+2643(in)X
+2725(seconds.)X
+755 5187(Table)N
+960(two)X
+1102(shows)X
+1324(that)X
+1466(LIBTP)X
+1710(outperforms)X
+2123(the)X
+2242(commercial)X
+2642(relational)X
+2966(system,)X
+3229(but)X
+3352(is)X
+3426(slower)X
+3661(than)X
+3820(OODBMS)X
+4183(and)X
+555 5277(INDEX.)N
+872(Since)X
+1077(the)X
+1202(caches)X
+1444(were)X
+1628(cleared)X
+1888(at)X
+1973(the)X
+2098(start)X
+2263(of)X
+2356(each)X
+2530(test,)X
+2687(disk)X
+2846(throughput)X
+3223(is)X
+3302(critical)X
+3551(in)X
+3639(this)X
+3780(test.)X
+3957(The)X
+4108(single)X
+555 5367(SCSI)N
+749(HP)X
+877(drive)X
+1068(used)X
+1241(by)X
+1347(LIBTP)X
+1595(is)X
+1674(approximately)X
+2163(13%)X
+2336(slower)X
+2576(than)X
+2739(the)X
+2862(disks)X
+3051(used)X
+3223(in)X
+3310([CATT91])X
+3678(which)X
+3899(accounts)X
+4205(for)X
+555 5457(part)N
+700(of)X
+787(the)X
+905(difference.)X
+755 5580(OODBMS)N
+1118(and)X
+1255(INDEX)X
+1525(outperform)X
+1906(LIBTP)X
+2148(most)X
+2323(dramatically)X
+2744(on)X
+2844(traversal.)X
+3181(This)X
+3343(is)X
+3416(because)X
+3691(we)X
+3805(use)X
+3932(index)X
+4130(look-)X
+555 5670(ups)N
+689(to)X
+774(\256nd)X
+921(connections,)X
+1347(whereas)X
+1634(the)X
+1755(other)X
+1942(two)X
+2084(systems)X
+2359(use)X
+2488(a)X
+2546(link)X
+2692(access)X
+2920(method.)X
+3222(The)X
+3369(index)X
+3569(requires)X
+3850(us)X
+3943(to)X
+4027(examine)X
+
+15 p
+%%Page: 15 15
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+10 f
+555 679(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)N
+2 f
+606 769(Measure)N
+1 f
+1019(INDEX)X
+1389(OODBMS)X
+1851(RDBMS)X
+2250(LIBTP)X
+10 f
+555 771(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)N
+555 787(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)N
+1 f
+595 869(Lookup)N
+1114(5.4)X
+1490(12.9)X
+1950(27)X
+2291(27.2)X
+595 959(Traversal)N
+1074(13)X
+1530(9.8)X
+1950(90)X
+2291(47.3)X
+595 1049(Insert)N
+1114(7.4)X
+1530(1.5)X
+1950(22)X
+2331(9.7)X
+10 f
+555 1059(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)N
+555(c)X
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+959 1059(c)N
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+1329 1059(c)N
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+1791 1059(c)N
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+2190 1059(c)N
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+2512 1059(c)N
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+2618 679(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2 f
+2829 769(Measure)N
+3401(Cache)X
+3726(Local)X
+4028(Remote)X
+1 f
+10 f
+2618 771(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2618 787(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2658 869(Lookup)N
+3401(cold)X
+3747(15.7)X
+4078(20.6)X
+3401 959(warm)N
+3787(7.8)X
+4078(12.4)X
+10 f
+2618 969(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2658 1059(Forward)N
+2950(traversal)X
+3401(cold)X
+3747(28.4)X
+4078(52.6)X
+3401 1149(warm)N
+3747(23.5)X
+4078(47.4)X
+10 f
+2618 1159(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2658 1249(Backward)N
+3004(traversal)X
+3401(cold)X
+3747(24.2)X
+4078(47.4)X
+3401 1339(warm)N
+3747(24.3)X
+4078(47.6)X
+10 f
+2618 1349(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+1 f
+2658 1439(Insert)N
+3401(cold)X
+3787(7.5)X
+4078(10.3)X
+3401 1529(warm)N
+3787(6.7)X
+4078(10.9)X
+10 f
+2618 1539(i)N
+2629(iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii)X
+2618(c)X
+1479(c)Y
+1399(c)Y
+1319(c)Y
+1239(c)Y
+1159(c)Y
+1079(c)Y
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+3341 1539(c)N
+1479(c)Y
+1399(c)Y
+1319(c)Y
+1239(c)Y
+1159(c)Y
+1079(c)Y
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+3666 1539(c)N
+1479(c)Y
+1399(c)Y
+1319(c)Y
+1239(c)Y
+1159(c)Y
+1079(c)Y
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+3968 1539(c)N
+1479(c)Y
+1399(c)Y
+1319(c)Y
+1239(c)Y
+1159(c)Y
+1079(c)Y
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+4309 1539(c)N
+1479(c)Y
+1399(c)Y
+1319(c)Y
+1239(c)Y
+1159(c)Y
+1079(c)Y
+999(c)Y
+919(c)Y
+839(c)Y
+759(c)Y
+3 f
+587 1785(Table)N
+823(2:)X
+931(Local)X
+1163(MC680x0)X
+1538(Performance)X
+2026(of)X
+2133(Several)X
+587 1875(Systems)N
+883(on)X
+987(OO1.)X
+2667 1785(Table)N
+2909(3:)X
+3023(Local)X
+3260(vs.)X
+3397(Remote)X
+3707(Performance)X
+4200(of)X
+2667 1875(LIBTP)N
+2926(on)X
+3030(OO1.)X
+1 f
+10 f
+555 1998(h)N
+579(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)X
+1 f
+555 2274(two)N
+696(disk)X
+850(pages,)X
+1074(but)X
+1197(the)X
+1316(links)X
+1492(require)X
+1741(only)X
+1904(one,)X
+2061(regardless)X
+2408(of)X
+2496(database)X
+2794(size.)X
+2980(Cattell)X
+3214(reports)X
+3458(that)X
+3599(lookups)X
+3873(using)X
+4067(B-trees)X
+555 2364(instead)N
+808(of)X
+901(links)X
+1082(makes)X
+1313(traversal)X
+1616(take)X
+1776(twice)X
+1976(as)X
+2069(long)X
+2237(in)X
+2325(INDEX.)X
+2641(Adding)X
+2907(a)X
+2969(link)X
+3119(access)X
+3351(method)X
+3617(to)X
+3 f
+3704(db)X
+1 f
+3792(\(3\))X
+3911(or)X
+4003(using)X
+4201(the)X
+555 2454(existing)N
+828(hash)X
+995(method)X
+1255(would)X
+1475(apparently)X
+1834(be)X
+1930(a)X
+1986(good)X
+2166(idea.)X
+755 2577(Both)N
+936(OODBMS)X
+1304(and)X
+1446(INDEX)X
+1722(issue)X
+1908 0.1944(coarser-granularity)AX
+2545(locks)X
+2739(than)X
+2902(LIBTP.)X
+3189(This)X
+3356(limits)X
+3562(concurrency)X
+3985(for)X
+4104(multi-)X
+555 2667(user)N
+711(applications,)X
+1140(but)X
+1264(helps)X
+1455(single-user)X
+1829(applications.)X
+2278(In)X
+2367(addition,)X
+2671(the)X
+2791(fact)X
+2934(that)X
+3076(LIBTP)X
+3319(releases)X
+3595(B-tree)X
+3817(locks)X
+4007(early)X
+4189(is)X
+4263(a)X
+555 2757(drawback)N
+896(in)X
+986(OO1.)X
+1210(Since)X
+1416(there)X
+1605(is)X
+1686(no)X
+1793(concurrency)X
+2218(in)X
+2307(the)X
+2432(benchmark,)X
+2836(high-concurrency)X
+3430(strategies)X
+3760(only)X
+3929(show)X
+4125(up)X
+4232(as)X
+555 2847(increased)N
+882(locking)X
+1145(overhead.)X
+1503(Finally,)X
+1772(the)X
+1892(architecture)X
+2294(of)X
+2383(the)X
+2503(LIBTP)X
+2747(implementation)X
+3271(was)X
+3418(substantially)X
+3844(different)X
+4143(from)X
+555 2937(that)N
+702(of)X
+796(either)X
+1006(OODBMS)X
+1375(or)X
+1469(INDEX.)X
+1786(Both)X
+1968(of)X
+2062(those)X
+2258(systems)X
+2538(do)X
+2645(the)X
+2770(searches)X
+3070(in)X
+3159(the)X
+3284(user's)X
+3503(address)X
+3771(space,)X
+3997(and)X
+4139(issue)X
+555 3027(requests)N
+844(for)X
+964(pages)X
+1173(to)X
+1260(the)X
+1383(server)X
+1605(process.)X
+1911(Pages)X
+2123(are)X
+2247(cached)X
+2496(in)X
+2583(the)X
+2706(client,)X
+2929(and)X
+3070(many)X
+3273(queries)X
+3530(can)X
+3667(be)X
+3768(satis\256ed)X
+4055(without)X
+555 3117(contacting)N
+910(the)X
+1029(server)X
+1247(at)X
+1326(all.)X
+1467(LIBTP)X
+1710(submits)X
+1979(all)X
+2080(the)X
+2199(queries)X
+2452(to)X
+2535(the)X
+2653(server)X
+2870(process,)X
+3151(and)X
+3287(receives)X
+3571(database)X
+3868(records)X
+4125(back;)X
+555 3207(it)N
+619(does)X
+786(no)X
+886(client)X
+1084(caching.)X
+755 3330(The)N
+911(RDBMS)X
+1221(architecture)X
+1632(is)X
+1716(much)X
+1925(closer)X
+2148(to)X
+2241(that)X
+2392(of)X
+2490(LIBTP.)X
+2783(A)X
+2872(server)X
+3100(process)X
+3372(receives)X
+3667(queries)X
+3930(and)X
+4076(returns)X
+555 3420(results)N
+786(to)X
+870(a)X
+928(client.)X
+1168(The)X
+1315(timing)X
+1545(results)X
+1776(in)X
+1860(table)X
+2038(two)X
+2180(clearly)X
+2421(show)X
+2612(that)X
+2754(the)X
+2874(conventional)X
+3309(database)X
+3607(client/server)X
+4025(model)X
+4246(is)X
+555 3510(expensive.)N
+941(LIBTP)X
+1188(outperforms)X
+1605(the)X
+1728(RDBMS)X
+2032(on)X
+2136(traversal)X
+2437(and)X
+2577(insertion.)X
+2921(We)X
+3057(speculate)X
+3380(that)X
+3524(this)X
+3663(is)X
+3740(due)X
+3880(in)X
+3966(part)X
+4115(to)X
+4201(the)X
+555 3600(overhead)N
+870(of)X
+957(query)X
+1160(parsing,)X
+1436(optimization,)X
+1880(and)X
+2016(repeated)X
+2309(interpretation)X
+2761(of)X
+2848(the)X
+2966(plan)X
+3124(tree)X
+3265(in)X
+3347(the)X
+3465(RDBMS')X
+3791(query)X
+3994(executor.)X
+755 3723(Table)N
+962(three)X
+1147(shows)X
+1371(the)X
+1492(differences)X
+1873(between)X
+2164(local)X
+2343(and)X
+2482(remote)X
+2728(execution)X
+3063(of)X
+3153(LIBTP's)X
+3456(OO1)X
+3635(implementation)X
+4160(on)X
+4263(a)X
+555 3813(DECstation.)N
+989(We)X
+1122(measured)X
+1451(performance)X
+1879(with)X
+2042(a)X
+2099(populated)X
+2436(\(warm\))X
+2694(cache)X
+2899(and)X
+3036(an)X
+3133(empty)X
+3354(\(cold\))X
+3567(cache.)X
+3812(Reported)X
+4126(times)X
+555 3903(are)N
+681(the)X
+806(means)X
+1037(of)X
+1130(twenty)X
+1374(tests,)X
+1562(and)X
+1704(are)X
+1829(in)X
+1917(seconds.)X
+2237(Standard)X
+2548(deviations)X
+2903(were)X
+3086(within)X
+3316(seven)X
+3525(percent)X
+3788(of)X
+3881(the)X
+4005(mean)X
+4205(for)X
+555 3993(remote,)N
+818(and)X
+954(two)X
+1094(percent)X
+1351(of)X
+1438(the)X
+1556(mean)X
+1750(for)X
+1864(local.)X
+755 4116(The)N
+914(20ms)X
+1121(overhead)X
+1450(of)X
+1551(TCP/IP)X
+1824(on)X
+1938(an)X
+2048(Ethernet)X
+2354(entirely)X
+2633(accounts)X
+2948(for)X
+3076(the)X
+3207(difference)X
+3567(in)X
+3662(speed.)X
+3918(The)X
+4076(remote)X
+555 4206(traversal)N
+857(times)X
+1055(are)X
+1179(nearly)X
+1405(double)X
+1648(the)X
+1771(local)X
+1952(times)X
+2150(because)X
+2430(we)X
+2549(do)X
+2653(index)X
+2855(lookups)X
+3132(and)X
+3272(part)X
+3421(fetches)X
+3673(in)X
+3759(separate)X
+4047(queries.)X
+555 4296(It)N
+629(would)X
+854(make)X
+1053(sense)X
+1252(to)X
+1339(do)X
+1444(indexed)X
+1723(searches)X
+2021(on)X
+2126(the)X
+2248(server,)X
+2489(but)X
+2615(we)X
+2733(were)X
+2914(unwilling)X
+3244(to)X
+3330(hard-code)X
+3676(knowledge)X
+4052(of)X
+4143(OO1)X
+555 4386(indices)N
+803(into)X
+948(our)X
+1075(LIBTP)X
+1317(TCL)X
+1488(server.)X
+1745(Cold)X
+1920(and)X
+2056(warm)X
+2259(insertion)X
+2559(times)X
+2752(are)X
+2871(identical)X
+3167(since)X
+3352(insertions)X
+3683(do)X
+3783(not)X
+3905(bene\256t)X
+4143(from)X
+555 4476(caching.)N
+755 4599(One)N
+915(interesting)X
+1279(difference)X
+1632(shown)X
+1867(by)X
+1973(table)X
+2155(three)X
+2342(is)X
+2421(the)X
+2545(cost)X
+2700(of)X
+2793(forward)X
+3074(versus)X
+3305(backward)X
+3644(traversal.)X
+3987(When)X
+4205(we)X
+555 4689(built)N
+725(the)X
+847(database,)X
+1168(we)X
+1285(inserted)X
+1562(parts)X
+1741(in)X
+1826(part)X
+2 f
+1974(id)X
+1 f
+2059(order.)X
+2292(We)X
+2427(built)X
+2596(the)X
+2717(indices)X
+2967(at)X
+3048(the)X
+3169(same)X
+3357(time.)X
+3562(Therefore,)X
+3923(the)X
+4044(forward)X
+555 4779(index)N
+757(had)X
+897(keys)X
+1068(inserted)X
+1346(in)X
+1432(order,)X
+1646(while)X
+1848(the)X
+1970(backward)X
+2307(index)X
+2509(had)X
+2649(keys)X
+2820(inserted)X
+3098(more)X
+3286(randomly.)X
+3656(In-order)X
+3943(insertion)X
+4246(is)X
+555 4885(pessimal)N
+858(for)X
+975(B-tree)X
+1199(indices,)X
+1469(so)X
+1563(the)X
+1684(forward)X
+1962(index)X
+2163(is)X
+2239(much)X
+2440(larger)X
+2651(than)X
+2812(the)X
+2933(backward)X
+3269(one)X
+7 s
+3385 4853(5)N
+10 s
+4885(.)Y
+3476(This)X
+3640(larger)X
+3850(size)X
+3997(shows)X
+4219(up)X
+555 4975(as)N
+642(extra)X
+823(disk)X
+976(reads)X
+1166(in)X
+1248(the)X
+1366(cold)X
+1524(benchmark.)X
+3 f
+555 5161(6.)N
+655(Conclusions)X
+1 f
+755 5284(LIBTP)N
+1006(provides)X
+1311(the)X
+1438(basic)X
+1632(building)X
+1927(blocks)X
+2165(to)X
+2256(support)X
+2525(transaction)X
+2906(protection.)X
+3300(In)X
+3396(comparison)X
+3799(with)X
+3970(traditional)X
+555 5374(Unix)N
+746(libraries)X
+1040(and)X
+1187(commercial)X
+1597(systems,)X
+1900(it)X
+1974(offers)X
+2192(a)X
+2258(variety)X
+2511(of)X
+2608(tradeoffs.)X
+2964(Using)X
+3185(complete)X
+3509(transaction)X
+3891(protection)X
+4246(is)X
+555 5464(more)N
+747(complicated)X
+1166(than)X
+1331(simply)X
+1575(adding)X
+3 f
+1820(fsync)X
+1 f
+1998(\(2\))X
+2119(and)X
+3 f
+2262(\257ock)X
+1 f
+2426(\(2\))X
+2547(calls)X
+2721(to)X
+2810(code,)X
+3008(but)X
+3136(it)X
+3206(is)X
+3285(faster)X
+3490(in)X
+3578(some)X
+3773(cases)X
+3969(and)X
+4111(offers)X
+8 s
+10 f
+555 5536(hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh)N
+5 s
+1 f
+727 5614(5)N
+8 s
+763 5639(The)N
+878(next)X
+1004(release)X
+1196(of)X
+1265(the)X
+1359(4.4BSD)X
+1580(access)X
+1758(method)X
+1966(will)X
+2082(automatically)X
+2446(detect)X
+2614(and)X
+2722(compensate)X
+3039(for)X
+3129(in-order)X
+3350(insertion,)X
+3606(eliminating)X
+3914(this)X
+4023(problem.)X
+
+16 p
+%%Page: 16 16
+8 s 8 xH 0 xS 1 f
+10 s
+3 f
+1 f
+555 630(stricter)N
+801(guarantees)X
+1168(\(atomicity,)X
+1540(consistency,)X
+1957(isolation,)X
+2275(and)X
+2414(durability\).)X
+2815(If)X
+2892(the)X
+3013(data)X
+3170(to)X
+3255(be)X
+3354(protected)X
+3676(are)X
+3798(already)X
+4058(format-)X
+555 720(ted)N
+675(\()X
+2 f
+702(i.e.)X
+1 f
+821(use)X
+949(one)X
+1086(of)X
+1174(the)X
+1293(database)X
+1591(access)X
+1818(methods\),)X
+2157(then)X
+2316(adding)X
+2555(transaction)X
+2928(protection)X
+3274(requires)X
+3554(no)X
+3655(additional)X
+3996(complex-)X
+555 810(ity,)N
+679(but)X
+801(incurs)X
+1017(a)X
+1073(performance)X
+1500(penalty)X
+1756(of)X
+1843(approximately)X
+2326(15%.)X
+755 933(In)N
+844(comparison)X
+1240(with)X
+1404(commercial)X
+1805(database)X
+2104(systems,)X
+2399(the)X
+2519(tradeoffs)X
+2827(are)X
+2948(more)X
+3135(complex.)X
+3473(LIBTP)X
+3717(does)X
+3886(not)X
+4009(currently)X
+555 1023(support)N
+825(a)X
+891(standard)X
+1193(query)X
+1406(language.)X
+1766(The)X
+1921(TCL-based)X
+2312(server)X
+2539(process)X
+2810(allows)X
+3049(a)X
+3115(certain)X
+3364(ease)X
+3533(of)X
+3630(use)X
+3767(which)X
+3993(would)X
+4223(be)X
+555 1113(enhanced)N
+882(with)X
+1047(a)X
+1106(more)X
+1294(user-friendly)X
+1732(interface)X
+2037(\()X
+2 f
+2064(e.g.)X
+1 f
+2203(a)X
+2261(windows)X
+2572(based)X
+2777(query-by-form)X
+3272(application\),)X
+3697(for)X
+3813(which)X
+4031(we)X
+4147(have)X
+555 1203(a)N
+620(working)X
+916(prototype.)X
+1292(When)X
+1513(accesses)X
+1815(do)X
+1924(not)X
+2055(require)X
+2312(sophisticated)X
+2758(query)X
+2969(processing,)X
+3360(the)X
+3486(TCL)X
+3665(interface)X
+3975(is)X
+4056(an)X
+4160(ade-)X
+555 1293(quate)N
+756(solution.)X
+1080(What)X
+1281(LIBTP)X
+1529(fails)X
+1693(to)X
+1781(provide)X
+2052(in)X
+2140(functionality,)X
+2595(it)X
+2665(makes)X
+2896(up)X
+3002(for)X
+3122(in)X
+3210(performance)X
+3643(and)X
+3785(\257exibility.)X
+4161(Any)X
+555 1383(application)N
+931(may)X
+1089(make)X
+1283(use)X
+1410(of)X
+1497(its)X
+1592(record)X
+1818(interface)X
+2120(or)X
+2207(the)X
+2325(more)X
+2510(primitive)X
+2823(log,)X
+2965(lock,)X
+3143(and)X
+3279(buffer)X
+3496(calls.)X
+755 1506(Future)N
+987(work)X
+1175(will)X
+1322(focus)X
+1519(on)X
+1621(overcoming)X
+2026(some)X
+2217(of)X
+2306(the)X
+2426(areas)X
+2614(in)X
+2698(which)X
+2916(LIBTP)X
+3160(is)X
+3235(currently)X
+3547(de\256cient)X
+3845(and)X
+3983(extending)X
+555 1596(its)N
+652(transaction)X
+1026(model.)X
+1288(The)X
+1435(addition)X
+1719(of)X
+1808(an)X
+1905(SQL)X
+2077(parser)X
+2295(and)X
+2432(forms)X
+2640(front)X
+2817(end)X
+2954(will)X
+3099(improve)X
+3387(the)X
+3506(system's)X
+3807(ease)X
+3967(of)X
+4055(use)X
+4183(and)X
+555 1686(make)N
+750(it)X
+815(more)X
+1001(competitive)X
+1400(with)X
+1563(commercial)X
+1963(systems.)X
+2277(In)X
+2365(the)X
+2484(long)X
+2647(term,)X
+2835(we)X
+2950(would)X
+3170(like)X
+3310(to)X
+3392(add)X
+3528(generalized)X
+3919(hierarchical)X
+555 1776(locking,)N
+836(nested)X
+1062(transactions,)X
+1486(parallel)X
+1748(transactions,)X
+2171(passing)X
+2431(of)X
+2518(transactions)X
+2921(between)X
+3209(processes,)X
+3557(and)X
+3693(distributed)X
+4055(commit)X
+555 1866(handling.)N
+900(In)X
+992(the)X
+1115(short)X
+1300(term,)X
+1492(the)X
+1614(next)X
+1776(step)X
+1929(is)X
+2006(to)X
+2092(integrate)X
+2397(LIBTP)X
+2643(with)X
+2809(the)X
+2931(most)X
+3110(recent)X
+3331(release)X
+3579(of)X
+3670(the)X
+3792(database)X
+4093(access)X
+555 1956(routines)N
+833(and)X
+969(make)X
+1163(it)X
+1227(freely)X
+1435(available)X
+1745(via)X
+1863(anonymous)X
+2252(ftp.)X
+3 f
+555 2142(7.)N
+655(Acknowledgements)X
+1 f
+755 2265(We)N
+888(would)X
+1109(like)X
+1250(to)X
+1332(thank)X
+1530(John)X
+1701(Wilkes)X
+1948(and)X
+2084(Carl)X
+2242(Staelin)X
+2484(of)X
+2571(Hewlett-Packard)X
+3131(Laboratories)X
+3557(and)X
+3693(Jon)X
+3824(Krueger.)X
+4148(John)X
+555 2355(and)N
+694(Carl)X
+855(provided)X
+1162(us)X
+1255(with)X
+1419(an)X
+1517(extra)X
+1700(disk)X
+1855(for)X
+1971(the)X
+2091(HP)X
+2215(testbed)X
+2464(less)X
+2606(than)X
+2766(24)X
+2868(hours)X
+3068(after)X
+3238(we)X
+3354(requested)X
+3684(it.)X
+3770(Jon)X
+3903(spent)X
+4094(count-)X
+555 2445(less)N
+699(hours)X
+901(helping)X
+1164(us)X
+1258(understand)X
+1633(the)X
+1754(intricacies)X
+2107(of)X
+2197(commercial)X
+2599(database)X
+2899(products)X
+3198(and)X
+3337(their)X
+3507(behavior)X
+3811(under)X
+4017(a)X
+4076(variety)X
+555 2535(of)N
+642(system)X
+884(con\256gurations.)X
+3 f
+555 2721(8.)N
+655(References)X
+1 f
+555 2901([ANDR89])N
+942(Andrade,)X
+1265(J.,)X
+1361(Carges,)X
+1629(M.,)X
+1765(Kovach,)X
+2060(K.,)X
+2183(``Building)X
+2541(an)X
+2642(On-Line)X
+2939(Transaction)X
+3343(Processing)X
+3715(System)X
+3975(On)X
+4098(UNIX)X
+727 2991(System)N
+982(V'',)X
+2 f
+1134(CommUNIXations)X
+1 f
+1725(,)X
+1765 0.2188(November/December)AX
+2477(1989.)X
+555 3171([BAY77])N
+878(Bayer,)X
+1110(R.,)X
+1223(Schkolnick,)X
+1623(M.,)X
+1754(``Concurrency)X
+2243(of)X
+2330(Operations)X
+2702(on)X
+2802(B-Trees'',)X
+2 f
+3155(Acta)X
+3322(Informatica)X
+1 f
+3700(,)X
+3740(1977.)X
+555 3351([BERN80])N
+936(Bernstein,)X
+1297(P.,)X
+1415(Goodman,)X
+1785(N.,)X
+1917(``Timestamp)X
+2365(Based)X
+2595(Algorithms)X
+2992(for)X
+3119(Concurrency)X
+3567(Control)X
+3844(in)X
+3939(Distributed)X
+727 3441(Database)N
+1042(Systems'',)X
+2 f
+1402(Proceedings)X
+1823(6th)X
+1945(International)X
+2387(Conference)X
+2777(on)X
+2877(Very)X
+3049(Large)X
+3260(Data)X
+3440(Bases)X
+1 f
+3627(,)X
+3667(October)X
+3946(1980.)X
+555 3621([BSD91])N
+864(DB\(3\),)X
+2 f
+1109(4.4BSD)X
+1376(Unix)X
+1552(Programmer's)X
+2044(Manual)X
+2313(Reference)X
+2655(Guide)X
+1 f
+2851(,)X
+2891(University)X
+3249(of)X
+3336(California,)X
+3701(Berkeley,)X
+4031(1991.)X
+555 3801([CATT91])N
+923(Cattell,)X
+1181(R.G.G.,)X
+1455(``An)X
+1632(Engineering)X
+2049(Database)X
+2369(Benchmark'',)X
+2 f
+2838(The)X
+2983(Benchmark)X
+3373(Handbook)X
+3731(for)X
+3848(Database)X
+4179(and)X
+727 3891(Transaction)N
+1133(Processing)X
+1509(Systems)X
+1 f
+1763(,)X
+1803(J.)X
+1874(Gray,)X
+2075(editor,)X
+2302(Morgan)X
+2576(Kaufman)X
+2895(1991.)X
+555 4071([CHEN91])N
+929(Cheng,)X
+1180(E.,)X
+1291(Chang,)X
+1542(E.,)X
+1653(Klein,)X
+1872(J.,)X
+1964(Lee,)X
+2126(D.,)X
+2245(Lu,)X
+2375(E.,)X
+2485(Lutgardo,)X
+2820(A.,)X
+2939(Obermarck,)X
+3342(R.,)X
+3456(``An)X
+3629(Open)X
+3824(and)X
+3961(Extensible)X
+727 4161(Event-Based)N
+1157(Transaction)X
+1556(Manager'',)X
+2 f
+1936(Proceedings)X
+2357(1991)X
+2537(Summer)X
+2820(Usenix)X
+1 f
+3043(,)X
+3083(Nashville,)X
+3430(TN,)X
+3577(June)X
+3744(1991.)X
+555 4341([CHOU85])N
+943(Chou,)X
+1163(H.,)X
+1288(DeWitt,)X
+1570(D.,)X
+1694(``An)X
+1872(Evaluation)X
+2245(of)X
+2338(Buffer)X
+2574(Management)X
+3019(Strategies)X
+3361(for)X
+3481(Relational)X
+3836(Database)X
+4157(Sys-)X
+727 4431(tems'',)N
+2 f
+972(Proceedings)X
+1393(of)X
+1475(the)X
+1593(11th)X
+1755(International)X
+2197(Conference)X
+2587(on)X
+2687(Very)X
+2859(Large)X
+3070(Databases)X
+1 f
+3408(,)X
+3448(1985.)X
+555 4611([DEWI84])N
+925(DeWitt,)X
+1207(D.,)X
+1331(Katz,)X
+1529(R.,)X
+1648(Olken,)X
+1890(F.,)X
+2000(Shapiro,)X
+2295(L.,)X
+2410(Stonebraker,)X
+2843(M.,)X
+2979(Wood,)X
+3220(D.,)X
+3343(``Implementation)X
+3929(Techniques)X
+727 4701(for)N
+841(Main)X
+1030(Memory)X
+1326(Database)X
+1641(Systems'',)X
+2 f
+2001(Proceedings)X
+2422(of)X
+2504(SIGMOD)X
+1 f
+2812(,)X
+2852(pp.)X
+2972(1-8,)X
+3119(June)X
+3286(1984.)X
+555 4881([GRAY76])N
+944(Gray,)X
+1153(J.,)X
+1252(Lorie,)X
+1474(R.,)X
+1595(Putzolu,)X
+1887(F.,)X
+1999(and)X
+2143(Traiger,)X
+2428(I.,)X
+2522(``Granularity)X
+2973(of)X
+3067(locks)X
+3263(and)X
+3406(degrees)X
+3679(of)X
+3773(consistency)X
+4174(in)X
+4263(a)X
+727 4971(large)N
+909(shared)X
+1140(data)X
+1295(base'',)X
+2 f
+1533(Modeling)X
+1861(in)X
+1944(Data)X
+2125(Base)X
+2301(Management)X
+2740(Systems)X
+1 f
+2994(,)X
+3034(Elsevier)X
+3317(North)X
+3524(Holland,)X
+3822(New)X
+3994(York,)X
+4199(pp.)X
+727 5061(365-394.)N
+555 5241([HAER83])N
+931(Haerder,)X
+1235(T.)X
+1348(Reuter,)X
+1606(A.)X
+1728(``Principles)X
+2126(of)X
+2217(Transaction-Oriented)X
+2928(Database)X
+3246(Recovery'',)X
+2 f
+3651(Computing)X
+4029(Surveys)X
+1 f
+4279(,)X
+727 5331(15\(4\);)N
+943(237-318,)X
+1250(1983.)X
+555 5511([KUNG81])N
+943(Kung,)X
+1162(H.)X
+1261(T.,)X
+1371(Richardson,)X
+1777(J.,)X
+1869(``On)X
+2042(Optimistic)X
+2400(Methods)X
+2701(for)X
+2816(Concurrency)X
+3252(Control'',)X
+2 f
+3591(ACM)X
+3781(Transactions)X
+4219(on)X
+727 5601(Database)N
+1054(Systems)X
+1 f
+1328(6\(2\);)X
+1504(213-226,)X
+1811(1981.)X
+
+17 p
+%%Page: 17 17
+10 s 10 xH 0 xS 1 f
+3 f
+1 f
+555 630([LEHM81])N
+939(Lehman,)X
+1245(P.,)X
+1352(Yao,)X
+1529(S.,)X
+1636(``Ef\256cient)X
+1989(Locking)X
+2279(for)X
+2396(Concurrent)X
+2780(Operations)X
+3155(on)X
+3258(B-trees'',)X
+2 f
+3587(ACM)X
+3779(Transactions)X
+4219(on)X
+727 720(Database)N
+1054(Systems)X
+1 f
+1308(,)X
+1348(6\(4\),)X
+1522(December)X
+1873(1981.)X
+555 900([MOHA91])N
+964(Mohan,)X
+1241(C.,)X
+1364(Pirahesh,)X
+1690(H.,)X
+1818(``ARIES-RRH:)X
+2366(Restricted)X
+2721(Repeating)X
+3076(of)X
+3173(History)X
+3442(in)X
+3533(the)X
+3660(ARIES)X
+3920(Transaction)X
+727 990(Recovery)N
+1055(Method'',)X
+2 f
+1398(Proceedings)X
+1819(7th)X
+1941(International)X
+2383(Conference)X
+2773(on)X
+2873(Data)X
+3053(Engineering)X
+1 f
+3449(,)X
+3489(Kobe,)X
+3703(Japan,)X
+3926(April)X
+4115(1991.)X
+555 1170([NODI90])N
+914(Nodine,)X
+1194(M.,)X
+1328(Zdonik,)X
+1602(S.,)X
+1709(``Cooperative)X
+2178(Transaction)X
+2580(Hierarchies:)X
+2996(A)X
+3077(Transaction)X
+3479(Model)X
+3711(to)X
+3796(Support)X
+4072(Design)X
+727 1260(Applications'',)N
+2 f
+1242(Proceedings)X
+1675(16th)X
+1849(International)X
+2303(Conference)X
+2704(on)X
+2815(Very)X
+2998(Large)X
+3220(Data)X
+3411(Bases)X
+1 f
+3598(,)X
+3649(Brisbane,)X
+3985(Australia,)X
+727 1350(August)N
+978(1990.)X
+555 1530([OUST90])N
+923(Ousterhout,)X
+1324(J.,)X
+1420(``Tcl:)X
+1648(An)X
+1771(Embeddable)X
+2197(Command)X
+2555(Language'',)X
+2 f
+2971(Proceedings)X
+3396(1990)X
+3580(Winter)X
+3822(Usenix)X
+1 f
+4045(,)X
+4089(Wash-)X
+727 1620(ington,)N
+971(D.C.,)X
+1162(January)X
+1432(1990.)X
+555 1800([POSIX91])N
+955(``Unapproved)X
+1441(Draft)X
+1645(for)X
+1773(Realtime)X
+2096(Extension)X
+2450(for)X
+2578(Portable)X
+2879(Operating)X
+3234(Systems'',)X
+3608(Draft)X
+3812(11,)X
+3946(October)X
+4239(7,)X
+727 1890(1991,)N
+927(IEEE)X
+1121(Computer)X
+1461(Society.)X
+555 2070([ROSE91])N
+925(Rosenblum,)X
+1341(M.,)X
+1484(Ousterhout,)X
+1892(J.,)X
+1995(``The)X
+2206(Design)X
+2464(and)X
+2611(Implementation)X
+3149(of)X
+3247(a)X
+3314(Log-Structured)X
+3835(File)X
+3990(System'',)X
+2 f
+727 2160(Proceedings)N
+1148(of)X
+1230(the)X
+1348(13th)X
+1510(Symposium)X
+1895(on)X
+1995(Operating)X
+2344(Systems)X
+2618(Principles)X
+1 f
+2947(,)X
+2987(1991.)X
+555 2340([SELT91])N
+904(Seltzer,)X
+1171(M.,)X
+1306(Stonebraker,)X
+1738(M.,)X
+1873(``Read)X
+2116(Optimized)X
+2478(File)X
+2626(Systems:)X
+2938(A)X
+3020(Performance)X
+3454(Evaluation'',)X
+2 f
+3898(Proceedings)X
+727 2430(7th)N
+849(Annual)X
+1100(International)X
+1542(Conference)X
+1932(on)X
+2032(Data)X
+2212(Engineering)X
+1 f
+2608(,)X
+2648(Kobe,)X
+2862(Japan,)X
+3085(April)X
+3274(1991.)X
+555 2610([SPEC88])N
+907(Spector,)X
+1200(Rausch,)X
+1484(Bruell,)X
+1732(``Camelot:)X
+2107(A)X
+2192(Flexible,)X
+2501(Distributed)X
+2888(Transaction)X
+3294(Processing)X
+3668(System'',)X
+2 f
+4004(Proceed-)X
+727 2700(ings)N
+880(of)X
+962(Spring)X
+1195(COMPCON)X
+1606(1988)X
+1 f
+(,)S
+1806(February)X
+2116(1988.)X
+555 2880([SQL86])N
+862(American)X
+1201(National)X
+1499(Standards)X
+1836(Institute,)X
+2139(``Database)X
+2509(Language)X
+2847(SQL'',)X
+3093(ANSI)X
+3301(X3.135-1986)X
+3747(\(ISO)X
+3924(9075\),)X
+4152(May)X
+727 2970(1986.)N
+555 3150([STON81])N
+919(Stonebraker,)X
+1348(M.,)X
+1480(``Operating)X
+1876(System)X
+2132(Support)X
+2406(for)X
+2520(Database)X
+2835(Management'',)X
+2 f
+3348(Communications)X
+3910(of)X
+3992(the)X
+4110(ACM)X
+1 f
+4279(,)X
+727 3240(1981.)N
+555 3420([SULL92])N
+925(Sullivan,)X
+1247(M.,)X
+1394(Olson,)X
+1641(M.,)X
+1788(``An)X
+1976(Index)X
+2195(Implementation)X
+2737(Supporting)X
+3127(Fast)X
+3295(Recovery)X
+3638(for)X
+3767(the)X
+3900(POSTGRES)X
+727 3510(Storage)N
+1014(System'',)X
+1365(to)X
+1469(appear)X
+1726(in)X
+2 f
+1830(Proceedings)X
+2272(8th)X
+2415(Annual)X
+2687(International)X
+3150(Conference)X
+3561(on)X
+3682(Data)X
+3883(Engineering)X
+1 f
+4279(,)X
+727 3600(Tempe,)N
+990(Arizona,)X
+1289(February)X
+1599(1992.)X
+555 3780([TPCB90])N
+914(Transaction)X
+1319(Processing)X
+1692(Performance)X
+2129(Council,)X
+2428(``TPC)X
+2653(Benchmark)X
+3048(B'',)X
+3200(Standard)X
+3510(Speci\256cation,)X
+3973(Waterside)X
+727 3870(Associates,)N
+1110(Fremont,)X
+1421(CA.,)X
+1592(1990.)X
+555 4050([YOUN91])N
+947(Young,)X
+1211(M.)X
+1328(W.,)X
+1470(Thompson,)X
+1858(D.)X
+1962(S.,)X
+2072(Jaffe,)X
+2274(E.,)X
+2388(``A)X
+2525(Modular)X
+2826(Architecture)X
+3253(for)X
+3372(Distributed)X
+3757(Transaction)X
+4161(Pro-)X
+727 4140(cessing'',)N
+2 f
+1057(Proceedings)X
+1478(1991)X
+1658(Winter)X
+1896(Usenix)X
+1 f
+2119(,)X
+2159(Dallas,)X
+2404(TX,)X
+2551(January)X
+2821(1991.)X
+3 f
+755 4263(Margo)N
+1008(I.)X
+1080(Seltzer)X
+1 f
+1338(is)X
+1411(a)X
+1467(Ph.D.)X
+1669(student)X
+1920(in)X
+2002(the)X
+2120(Department)X
+2519(of)X
+2606(Electrical)X
+2934(Engineering)X
+3346(and)X
+3482(Computer)X
+3822(Sciences)X
+4123(at)X
+4201(the)X
+555 4353(University)N
+919(of)X
+1012(California,)X
+1383(Berkeley.)X
+1739(Her)X
+1886(research)X
+2181(interests)X
+2474(include)X
+2735(\256le)X
+2862(systems,)X
+3160(databases,)X
+3513(and)X
+3654(transaction)X
+4031(process-)X
+555 4443(ing)N
+686(systems.)X
+1008(She)X
+1157(spent)X
+1355(several)X
+1612(years)X
+1811(working)X
+2107(at)X
+2194(startup)X
+2441(companies)X
+2813(designing)X
+3153(and)X
+3298(implementing)X
+3771(\256le)X
+3902(systems)X
+4183(and)X
+555 4533(transaction)N
+929(processing)X
+1294(software)X
+1592(and)X
+1729(designing)X
+2061(microprocessors.)X
+2648(Ms.)X
+2791(Seltzer)X
+3035(received)X
+3329(her)X
+3453(AB)X
+3585(in)X
+3668(Applied)X
+3947(Mathemat-)X
+555 4623(ics)N
+664(from)X
+840 0.1953(Harvard/Radcliffe)AX
+1445(College)X
+1714(in)X
+1796(1983.)X
+755 4746(In)N
+845(her)X
+971(spare)X
+1163(time,)X
+1347(Margo)X
+1583(can)X
+1717(usually)X
+1970(be)X
+2068(found)X
+2277(preparing)X
+2607(massive)X
+2887(quantities)X
+3220(of)X
+3309(food)X
+3478(for)X
+3594(hungry)X
+3843(hordes,)X
+4099(study-)X
+555 4836(ing)N
+677(Japanese,)X
+1003(or)X
+1090(playing)X
+1350(soccer)X
+1576(with)X
+1738(an)X
+1834(exciting)X
+2112(Bay)X
+2261(Area)X
+2438(Women's)X
+2770(Soccer)X
+3009(team,)X
+3205(the)X
+3323(Berkeley)X
+3633(Bruisers.)X
+3 f
+755 5049(Michael)N
+1056(A.)X
+1159(Olson)X
+1 f
+1383(is)X
+1461(a)X
+1522(Master's)X
+1828(student)X
+2084(in)X
+2170(the)X
+2292(Department)X
+2695(of)X
+2786(Electrical)X
+3118(Engineering)X
+3534(and)X
+3674(Computer)X
+4018(Sciences)X
+555 5139(at)N
+645(the)X
+774(University)X
+1143(of)X
+1241(California,)X
+1617(Berkeley.)X
+1978(His)X
+2120(primary)X
+2405(interests)X
+2703(are)X
+2833(database)X
+3141(systems)X
+3425(and)X
+3572(mass)X
+3763(storage)X
+4026(systems.)X
+555 5229(Mike)N
+759(spent)X
+963(two)X
+1118(years)X
+1323(working)X
+1625(for)X
+1754(a)X
+1825(commercial)X
+2239(database)X
+2551(system)X
+2808(vendor)X
+3066(before)X
+3307(joining)X
+3567(the)X
+3699(Postgres)X
+4004(Research)X
+555 5319(Group)N
+780(at)X
+858(Berkeley)X
+1168(in)X
+1250(1988.)X
+1470(He)X
+1584(received)X
+1877(his)X
+1990(B.A.)X
+2161(in)X
+2243(Computer)X
+2583(Science)X
+2853(from)X
+3029(Berkeley)X
+3339(in)X
+3421(May)X
+3588(1991.)X
+755 5442(Mike)N
+945(only)X
+1108(recently)X
+1388(transferred)X
+1758(into)X
+1903(Sin)X
+2030(City,)X
+2208(but)X
+2330(is)X
+2403(rapidly)X
+2650(adopting)X
+2950(local)X
+3126(customs)X
+3408(and)X
+3544(coloration.)X
+3929(In)X
+4016(his)X
+4129(spare)X
+555 5532(time,)N
+742(he)X
+843(organizes)X
+1176(informal)X
+1477(Friday)X
+1711(afternoon)X
+2043(study)X
+2240(groups)X
+2482(to)X
+2568(discuss)X
+2823(recent)X
+3044(technical)X
+3358(and)X
+3498(economic)X
+3834(developments.)X
+555 5622(Among)N
+815(his)X
+928(hobbies)X
+1197(are)X
+1316(Charles)X
+1581(Dickens,)X
+1884(Red)X
+2033(Rock,)X
+2242(and)X
+2378(speaking)X
+2683(Dutch)X
+2899(to)X
+2981(anyone)X
+3233(who)X
+3391(will)X
+3535(permit)X
+3764(it.)X
+
+17 p
+%%Trailer
+xt
+
+xs
+
diff --git a/src/plugins/kdb/db2/libdb2/docs/mpool.3.ps b/src/plugins/kdb/db2/libdb2/docs/mpool.3.ps
new file mode 100644
index 0000000000..816c9243c8
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/mpool.3.ps
@@ -0,0 +1,320 @@
+%!PS-Adobe-3.0
+%%Creator: groff version 1.08
+%%DocumentNeededResources: font Times-Roman
+%%+ font Times-Bold
+%%+ font Times-Italic
+%%DocumentSuppliedResources: procset grops 1.08 0
+%%Pages: 2
+%%PageOrder: Ascend
+%%Orientation: Portrait
+%%EndComments
+%%BeginProlog
+%%BeginResource: procset grops 1.08 0
+/setpacking where{
+pop
+currentpacking
+true setpacking
+}if
+/grops 120 dict dup begin
+/SC 32 def
+/A/show load def
+/B{0 SC 3 -1 roll widthshow}bind def
+/C{0 exch ashow}bind def
+/D{0 exch 0 SC 5 2 roll awidthshow}bind def
+/E{0 rmoveto show}bind def
+/F{0 rmoveto 0 SC 3 -1 roll widthshow}bind def
+/G{0 rmoveto 0 exch ashow}bind def
+/H{0 rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/I{0 exch rmoveto show}bind def
+/J{0 exch rmoveto 0 SC 3 -1 roll widthshow}bind def
+/K{0 exch rmoveto 0 exch ashow}bind def
+/L{0 exch rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/M{rmoveto show}bind def
+/N{rmoveto 0 SC 3 -1 roll widthshow}bind def
+/O{rmoveto 0 exch ashow}bind def
+/P{rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/Q{moveto show}bind def
+/R{moveto 0 SC 3 -1 roll widthshow}bind def
+/S{moveto 0 exch ashow}bind def
+/T{moveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/SF{
+findfont exch
+[exch dup 0 exch 0 exch neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/MF{
+findfont
+[5 2 roll
+0 3 1 roll 
+neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/level0 0 def
+/RES 0 def
+/PL 0 def
+/LS 0 def
+/PLG{
+gsave newpath clippath pathbbox grestore
+exch pop add exch pop
+}bind def
+/BP{
+/level0 save def
+1 setlinecap
+1 setlinejoin
+72 RES div dup scale
+LS{
+90 rotate
+}{
+0 PL translate
+}ifelse
+1 -1 scale
+}bind def
+/EP{
+level0 restore
+showpage
+}bind def
+/DA{
+newpath arcn stroke
+}bind def
+/SN{
+transform
+.25 sub exch .25 sub exch
+round .25 add exch round .25 add exch
+itransform
+}bind def
+/DL{
+SN
+moveto
+SN
+lineto stroke
+}bind def
+/DC{
+newpath 0 360 arc closepath
+}bind def
+/TM matrix def
+/DE{
+TM currentmatrix pop
+translate scale newpath 0 0 .5 0 360 arc closepath
+TM setmatrix
+}bind def
+/RC/rcurveto load def
+/RL/rlineto load def
+/ST/stroke load def
+/MT/moveto load def
+/CL/closepath load def
+/FL{
+currentgray exch setgray fill setgray
+}bind def
+/BL/fill load def
+/LW/setlinewidth load def
+/RE{
+findfont
+dup maxlength 1 index/FontName known not{1 add}if dict begin
+{
+1 index/FID ne{def}{pop pop}ifelse
+}forall
+/Encoding exch def
+dup/FontName exch def
+currentdict end definefont pop
+}bind def
+/DEFS 0 def
+/EBEGIN{
+moveto
+DEFS begin
+}bind def
+/EEND/end load def
+/CNT 0 def
+/level1 0 def
+/PBEGIN{
+/level1 save def
+translate
+div 3 1 roll div exch scale
+neg exch neg exch translate
+0 setgray
+0 setlinecap
+1 setlinewidth
+0 setlinejoin
+10 setmiterlimit
+[]0 setdash
+/setstrokeadjust where{
+pop
+false setstrokeadjust
+}if
+/setoverprint where{
+pop
+false setoverprint
+}if
+newpath
+/CNT countdictstack def
+userdict begin
+/showpage{}def
+}bind def
+/PEND{
+clear
+countdictstack CNT sub{end}repeat
+level1 restore
+}bind def
+end def
+/setpacking where{
+pop
+setpacking
+}if
+%%EndResource
+%%IncludeResource: font Times-Roman
+%%IncludeResource: font Times-Bold
+%%IncludeResource: font Times-Italic
+grops begin/DEFS 1 dict def DEFS begin/u{.001 mul}bind def end/RES 72 def/PL
+792 def/LS false def/ENC0[/asciicircum/asciitilde/Scaron/Zcaron/scaron/zcaron
+/Ydieresis/trademark/quotesingle/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/space
+/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft
+/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four
+/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C
+/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash
+/bracketright/circumflex/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q
+/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/tilde/.notdef/quotesinglbase
+/guillemotleft/guillemotright/bullet/florin/fraction/perthousand/dagger
+/daggerdbl/endash/emdash/ff/fi/fl/ffi/ffl/dotlessi/dotlessj/grave/hungarumlaut
+/dotaccent/breve/caron/ring/ogonek/quotedblleft/quotedblright/oe/lslash
+/quotedblbase/OE/Lslash/.notdef/exclamdown/cent/sterling/currency/yen/brokenbar
+/section/dieresis/copyright/ordfeminine/guilsinglleft/logicalnot/minus
+/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu
+/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guilsinglright
+/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde
+/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
+/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis
+/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute
+/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve
+/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex
+/udieresis/yacute/thorn/ydieresis]def/Times-Italic@0 ENC0/Times-Italic RE
+/Times-Bold@0 ENC0/Times-Bold RE/Times-Roman@0 ENC0/Times-Roman RE
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 129.01(MPOOL\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 129.01(anual MPOOL\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72 84 S
+(ME).18 E F0(mpool \255 shared memory b)108 96 Q(uf)-.2 E(fer pool)-.25 E F1
+(SYNOPSIS)72 112.8 Q/F2 10/Times-Bold@0 SF(#include <db)108 124.8 Q(.h>)-.4 E
+(#include <mpool.h>)108 136.8 Q(MPOOL *)108 160.8 Q(mpool_open \(DBT *k)108
+172.8 Q(ey)-.1 E 2.5(,i)-.55 G(nt fd, pgno_t pagesize, pgno_t maxcache\);)
+216.25 172.8 Q -.1(vo)108 196.8 S(id).1 E(mpool_\214lter \(MPOOL *mp, v)108
+208.8 Q(oid \(*pgin\)\(v)-.1 E(oid *, pgno_t, v)-.1 E(oid *\),)-.1 E -.1(vo)158
+220.8 S(id \(*pgout\)\(v).1 E(oid *, pgno_t, v)-.1 E(oid *\), v)-.1 E
+(oid *pgcookie\);)-.1 E -.1(vo)108 244.8 S(id *).1 E
+(mpool_new \(MPOOL *mp, pgno_t *pgnoaddr\);)108 256.8 Q -.1(vo)108 280.8 S
+(id *).1 E(mpool_get \(MPOOL *mp, pgno_t pgno, u_int \215ags\);)108 292.8 Q
+(int)108 316.8 Q(mpool_put \(MPOOL *mp, v)108 328.8 Q(oid *pgaddr)-.1 E 2.5(,u)
+-.92 G(_int \215ags\);)290.62 328.8 Q(int)108 352.8 Q
+(mpool_sync \(MPOOL *mp\);)108 364.8 Q(int)108 388.8 Q
+(mpool_close \(MPOOL *mp\);)108 400.8 Q F1(DESCRIPTION)72 417.6 Q/F3 10
+/Times-Italic@0 SF(Mpool)108 429.6 Q F0 1.013(is the library interf)3.513 F
+1.013(ace intended to pro)-.1 F 1.013(vide page oriented b)-.15 F(uf)-.2 E
+1.012(fer management of \214les.)-.25 F 1.012(The b)6.012 F(uf)-.2 E(fers)-.25
+E(may be shared between processes.)108 441.6 Q .416(The function)108 458.4 R F3
+(mpool_open)2.916 E F0 .417(initializes a memory pool.)2.917 F(The)5.417 E F3
+-.1(ke)2.917 G(y)-.2 E F0(ar)2.917 E .417(gument is the byte string used to ne)
+-.18 F(gotiate)-.15 E .697(between multiple processes wishing to share b)108
+470.4 R(uf)-.2 E 3.196(fers. If)-.25 F .696(the \214le b)3.196 F(uf)-.2 E .696
+(fers are mapped in shared memory)-.25 F 3.196(,a)-.65 G(ll)534.44 470.4 Q .894
+(processes using the same k)108 482.4 R 1.194 -.15(ey w)-.1 H .894
+(ill share the b).15 F(uf)-.2 E 3.394(fers. If)-.25 F F3 -.1(ke)3.394 G(y)-.2 E
+F0 .895(is NULL, the b)3.395 F(uf)-.2 E .895(fers are mapped into pri)-.25 F
+-.25(va)-.25 G(te).25 E(memory)108 494.4 Q 5.116(.T)-.65 G(he)154.406 494.4 Q
+F3(fd)2.616 E F0(ar)2.616 E .115(gument is a \214le descriptor for the underly\
+ing \214le, which must be seekable.)-.18 F(If)5.115 E F3 -.1(ke)2.615 G(y)-.2 E
+F0 .115(is non-)2.615 F(NULL and matches a \214le already being mapped, the)108
+506.4 Q F3(fd)2.5 E F0(ar)2.5 E(gument is ignored.)-.18 E(The)108 523.2 Q F3
+(pa)3.328 E -.1(ge)-.1 G(size).1 E F0(ar)3.329 E .829
+(gument is the size, in bytes, of the pages into which the \214le is brok)-.18
+F .829(en up.)-.1 F(The)5.829 E F3(maxcac)3.329 E(he)-.15 E F0(ar)108 535.2 Q
+.153(gument is the maximum number of pages from the underlying \214le to cache\
+ at an)-.18 F 2.653(yo)-.15 G .153(ne time.)451.308 535.2 R .153(This v)5.153 F
+.153(alue is)-.25 F .099(not relati)108 547.2 R .399 -.15(ve t)-.25 H 2.599(ot)
+.15 G .099(he number of processes which share a \214le')168.727 547.2 R 2.6(sb)
+-.55 G(uf)350.39 547.2 Q .1(fers, b)-.25 F .1(ut will be the lar)-.2 F .1
+(gest v)-.18 F .1(alue speci\214ed by)-.25 F(an)108 559.2 Q 2.5(yo)-.15 G 2.5
+(ft)129.79 559.2 S(he processes sharing the \214le.)138.4 559.2 Q(The)108 576 Q
+F3(mpool_\214lter)3.254 E F0 .754(function is intended to mak)3.254 F 3.254(et)
+-.1 G .754(ransparent input and output processing of the pages possi-)301.778
+576 R 3.095(ble. If)108 588 R(the)3.095 E F3(pgin)3.095 E F0 .596
+(function is speci\214ed, it is called each time a b)3.095 F(uf)-.2 E .596
+(fer is read into the memory pool from the)-.25 F .125(backing \214le.)108 600
+R .125(If the)5.125 F F3(pgout)2.625 E F0 .125
+(function is speci\214ed, it is called each time a b)2.625 F(uf)-.2 E .125
+(fer is written into the backing \214le.)-.25 F .276
+(Both functions are are called with the)108 612 R F3(pgcookie)2.777 E F0
+(pointer)2.777 E 2.777(,t)-.4 G .277
+(he page number and a pointer to the page to being)337.27 612 R
+(read or written.)108 624 Q .124(The function)108 640.8 R F3(mpool_ne)2.624 E
+(w)-.15 E F0(tak)2.624 E .123(es an MPOOL pointer and an address as ar)-.1 F
+2.623(guments. If)-.18 F 2.623(an)2.623 G .623 -.25(ew p)457.568 640.8 T .123
+(age can be allo-).25 F .944(cated, a pointer to the page is returned and the \
+page number is stored into the)108 652.8 R F3(pgnoaddr)3.445 E F0 3.445
+(address. Other)3.445 F(-)-.2 E(wise, NULL is returned and errno is set.)108
+664.8 Q 1.167(The function)108 681.6 R F3(mpool_g)3.667 E(et)-.1 E F0(tak)3.667
+E 1.167(es a MPOOL pointer and a page number as ar)-.1 F 3.666(guments. If)-.18
+F 1.166(the page e)3.666 F 1.166(xists, a)-.15 F .686
+(pointer to the page is returned.)108 693.6 R .687
+(Otherwise, NULL is returned and errno is set.)5.686 F .687
+(The \215ags parameter is not)5.687 F(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G
+(istrib)132.57 732 Q 104.595(ution June)-.2 F(4, 1993)2.5 E(1)535 732 Q EP
+%%Page: 2 2
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 129.01(MPOOL\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 129.01(anual MPOOL\(3\))340.17 48 R(currently used.)108 84 Q 1.463
+(The function)108 100.8 R/F1 10/Times-Italic@0 SF(mpool_put)3.963 E F0 1.462
+(unpins the page referenced by)3.962 F F1(pgaddr)3.962 E F0(.).73 E F1(Pgaddr)
+6.462 E F0 1.462(must be an address pre)3.962 F(viously)-.25 E(returned by)108
+112.8 Q F1(mpool_g)2.5 E(et)-.1 E F0(or)2.5 E F1(mpool_ne)2.5 E(w)-.15 E F0 5
+(.T).31 G(he \215ag v)271.65 112.8 Q(alue is speci\214ed by)-.25 E F1(or)2.5 E
+F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)434.74 112.8 S(he follo)443.35 112.8 Q
+(wing v)-.25 E(alues:)-.25 E(MPOOL_DIR)108 129.6 Q(TY)-.6 E
+(The page has been modi\214ed and needs to be written to the backing \214le.)
+144 141.6 Q F1(Mpool_put)108 158.4 Q F0
+(returns 0 on success and -1 if an error occurs.)2.5 E .247(The function)108
+175.2 R F1(mpool_sync)2.747 E F0 .247(writes all modi\214ed pages associated w\
+ith the MPOOL pointer to the backing \214le.)2.747 F F1(Mpool_sync)108 187.2 Q
+F0(returns 0 on success and -1 if an error occurs.)2.5 E(The)108 204 Q F1
+(mpool_close)2.698 E F0 .198(function free')2.698 F 2.698(su)-.55 G 2.698(pa)
+245.432 204 S .498 -.15(ny a)257.57 204 T .198
+(llocated memory associated with the memory pool cookie.).15 F(Modi-)5.197 E
+(\214ed pages are)108 216 Q/F2 10/Times-Bold@0 SF(not)2.5 E F0
+(written to the backing \214le.)2.5 E F1(Mpool_close)5 E F0
+(returns 0 on success and -1 if an error occurs.)2.5 E/F3 9/Times-Bold@0 SF
+(ERR)72 232.8 Q(ORS)-.27 E F0(The)108 244.8 Q F1(mpool_open)2.938 E F0 .438
+(function may f)2.938 F .438(ail and set)-.1 F F1(errno)2.938 E F0 .438(for an)
+2.938 F 2.938(yo)-.15 G 2.938(ft)344.87 244.8 S .439
+(he errors speci\214ed for the library routine)353.918 244.8 R F1(mal-)2.939 E
+(loc)108 256.8 Q F0(\(3\).).31 E(The)108 273.6 Q F1(mpool_g)2.5 E(et)-.1 E F0
+(function may f)2.5 E(ail and set)-.1 E F1(errno)2.5 E F0(for the follo)2.5 E
+(wing:)-.25 E([EINV)108 290.4 Q 29.98(AL] The)-1.35 F(requested record doesn')
+2.5 E 2.5(te)-.18 G(xist.)305.96 290.4 Q(The)108 307.2 Q F1(mpool_ne)4.073 E(w)
+-.15 E F0(and)4.073 E F1(mpool_g)4.073 E(et)-.1 E F0 1.573(functions may f)
+4.073 F 1.573(ail and set)-.1 F F1(errno)4.073 E F0 1.573(for an)4.073 F 4.073
+(yo)-.15 G 4.073(ft)421.336 307.2 S 1.573(he errors speci\214ed for the)431.519
+307.2 R(library routines)108 319.2 Q F1 -.37(re)2.5 G(ad).37 E F0(\(2\)).77 E
+F1 2.5(,w).54 G(rite)214.48 319.2 Q F0(\(2\)).18 E F1(,).54 E F0(and)2.5 E F1
+(malloc)2.5 E F0(\(3\).).31 E(The)108 336 Q F1(mpool_sync)4.287 E F0 1.787
+(function may f)4.287 F 1.787(ail and set)-.1 F F1(errno)4.288 E F0 1.788
+(for an)4.288 F 4.288(yo)-.15 G 4.288(ft)356.694 336 S 1.788
+(he errors speci\214ed for the library routine)367.092 336 R F1(write)108 348 Q
+F0(\(2\).).18 E(The)108 364.8 Q F1(mpool_close)4.125 E F0 1.624(function may f)
+4.125 F 1.624(ail and set)-.1 F F1(errno)4.124 E F0 1.624(for an)4.124 F 4.124
+(yo)-.15 G 4.124(ft)357.842 364.8 S 1.624
+(he errors speci\214ed for the library routine)368.076 364.8 R F1(fr)108 376.8
+Q(ee)-.37 E F0(\(3\).).18 E F3(SEE ALSO)72 393.6 Q F1(dbopen)108 405.6 Q F0
+(\(3\),).24 E F1(btr)2.5 E(ee)-.37 E F0(\(3\),).18 E F1(hash)2.5 E F0(\(3\),)
+.28 E F1 -.37(re)2.5 G(cno).37 E F0(\(3\)).18 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5
+(yD)-.15 G(istrib)132.57 732 Q 104.595(ution June)-.2 F(4, 1993)2.5 E(2)535 732
+Q EP
+%%Trailer
+end
+%%EOF
diff --git a/src/plugins/kdb/db2/libdb2/docs/recno.3.ps b/src/plugins/kdb/db2/libdb2/docs/recno.3.ps
new file mode 100644
index 0000000000..8ffccfca90
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/docs/recno.3.ps
@@ -0,0 +1,341 @@
+%!PS-Adobe-3.0
+%%Creator: groff version 1.08
+%%DocumentNeededResources: font Times-Roman
+%%+ font Times-Bold
+%%+ font Times-Italic
+%%DocumentSuppliedResources: procset grops 1.08 0
+%%Pages: 2
+%%PageOrder: Ascend
+%%Orientation: Portrait
+%%EndComments
+%%BeginProlog
+%%BeginResource: procset grops 1.08 0
+/setpacking where{
+pop
+currentpacking
+true setpacking
+}if
+/grops 120 dict dup begin
+/SC 32 def
+/A/show load def
+/B{0 SC 3 -1 roll widthshow}bind def
+/C{0 exch ashow}bind def
+/D{0 exch 0 SC 5 2 roll awidthshow}bind def
+/E{0 rmoveto show}bind def
+/F{0 rmoveto 0 SC 3 -1 roll widthshow}bind def
+/G{0 rmoveto 0 exch ashow}bind def
+/H{0 rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/I{0 exch rmoveto show}bind def
+/J{0 exch rmoveto 0 SC 3 -1 roll widthshow}bind def
+/K{0 exch rmoveto 0 exch ashow}bind def
+/L{0 exch rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/M{rmoveto show}bind def
+/N{rmoveto 0 SC 3 -1 roll widthshow}bind def
+/O{rmoveto 0 exch ashow}bind def
+/P{rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/Q{moveto show}bind def
+/R{moveto 0 SC 3 -1 roll widthshow}bind def
+/S{moveto 0 exch ashow}bind def
+/T{moveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/SF{
+findfont exch
+[exch dup 0 exch 0 exch neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/MF{
+findfont
+[5 2 roll
+0 3 1 roll 
+neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/level0 0 def
+/RES 0 def
+/PL 0 def
+/LS 0 def
+/PLG{
+gsave newpath clippath pathbbox grestore
+exch pop add exch pop
+}bind def
+/BP{
+/level0 save def
+1 setlinecap
+1 setlinejoin
+72 RES div dup scale
+LS{
+90 rotate
+}{
+0 PL translate
+}ifelse
+1 -1 scale
+}bind def
+/EP{
+level0 restore
+showpage
+}bind def
+/DA{
+newpath arcn stroke
+}bind def
+/SN{
+transform
+.25 sub exch .25 sub exch
+round .25 add exch round .25 add exch
+itransform
+}bind def
+/DL{
+SN
+moveto
+SN
+lineto stroke
+}bind def
+/DC{
+newpath 0 360 arc closepath
+}bind def
+/TM matrix def
+/DE{
+TM currentmatrix pop
+translate scale newpath 0 0 .5 0 360 arc closepath
+TM setmatrix
+}bind def
+/RC/rcurveto load def
+/RL/rlineto load def
+/ST/stroke load def
+/MT/moveto load def
+/CL/closepath load def
+/FL{
+currentgray exch setgray fill setgray
+}bind def
+/BL/fill load def
+/LW/setlinewidth load def
+/RE{
+findfont
+dup maxlength 1 index/FontName known not{1 add}if dict begin
+{
+1 index/FID ne{def}{pop pop}ifelse
+}forall
+/Encoding exch def
+dup/FontName exch def
+currentdict end definefont pop
+}bind def
+/DEFS 0 def
+/EBEGIN{
+moveto
+DEFS begin
+}bind def
+/EEND/end load def
+/CNT 0 def
+/level1 0 def
+/PBEGIN{
+/level1 save def
+translate
+div 3 1 roll div exch scale
+neg exch neg exch translate
+0 setgray
+0 setlinecap
+1 setlinewidth
+0 setlinejoin
+10 setmiterlimit
+[]0 setdash
+/setstrokeadjust where{
+pop
+false setstrokeadjust
+}if
+/setoverprint where{
+pop
+false setoverprint
+}if
+newpath
+/CNT countdictstack def
+userdict begin
+/showpage{}def
+}bind def
+/PEND{
+clear
+countdictstack CNT sub{end}repeat
+level1 restore
+}bind def
+end def
+/setpacking where{
+pop
+setpacking
+}if
+%%EndResource
+%%IncludeResource: font Times-Roman
+%%IncludeResource: font Times-Bold
+%%IncludeResource: font Times-Italic
+grops begin/DEFS 1 dict def DEFS begin/u{.001 mul}bind def end/RES 72 def/PL
+792 def/LS false def/ENC0[/asciicircum/asciitilde/Scaron/Zcaron/scaron/zcaron
+/Ydieresis/trademark/quotesingle/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/space
+/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft
+/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four
+/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C
+/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash
+/bracketright/circumflex/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q
+/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/tilde/.notdef/quotesinglbase
+/guillemotleft/guillemotright/bullet/florin/fraction/perthousand/dagger
+/daggerdbl/endash/emdash/ff/fi/fl/ffi/ffl/dotlessi/dotlessj/grave/hungarumlaut
+/dotaccent/breve/caron/ring/ogonek/quotedblleft/quotedblright/oe/lslash
+/quotedblbase/OE/Lslash/.notdef/exclamdown/cent/sterling/currency/yen/brokenbar
+/section/dieresis/copyright/ordfeminine/guilsinglleft/logicalnot/minus
+/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu
+/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guilsinglright
+/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde
+/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
+/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis
+/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute
+/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve
+/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex
+/udieresis/yacute/thorn/ydieresis]def/Times-Italic@0 ENC0/Times-Italic RE
+/Times-Bold@0 ENC0/Times-Bold RE/Times-Roman@0 ENC0/Times-Roman RE
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 130.12(RECNO\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 130.12(anual RECNO\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72 84 S
+(ME).18 E F0(recno \255 record number database access method)108 96 Q F1
+(SYNOPSIS)72 112.8 Q/F2 10/Times-Bold@0 SF(#include <sys/types.h>)108 124.8 Q
+(#include <db)108 136.8 Q(.h>)-.4 E F1(DESCRIPTION)72 153.6 Q F0 1.158
+(The routine)108 165.6 R/F3 10/Times-Italic@0 SF(dbopen)3.658 E F0 1.158
+(is the library interf)3.658 F 1.158(ace to database \214les.)-.1 F 1.157
+(One of the supported \214le formats is record)6.158 F 1.159(number \214les.)
+108 177.6 R 1.159(The general description of the database access methods is in)
+6.159 F F3(dbopen)3.66 E F0 1.16(\(3\), this manual page).24 F
+(describes only the recno speci\214c information.)108 189.6 Q 1.944
+(The record number data structure is either v)108 206.4 R 1.944
+(ariable or \214x)-.25 F 1.944
+(ed-length records stored in a \215at-\214le format,)-.15 F 2.04
+(accessed by the logical record number)108 218.4 R 7.04(.T)-.55 G 2.04(he e)
+286.31 218.4 R 2.04(xistence of record number \214v)-.15 F 4.54(ei)-.15 G 2.04
+(mplies the e)442.1 218.4 R 2.04(xistence of)-.15 F .876
+(records one through four)108 230.4 R 3.376(,a)-.4 G .875
+(nd the deletion of record number one causes record number \214v)219.684 230.4
+R 3.375(et)-.15 G 3.375(ob)489.93 230.4 S 3.375(er)503.305 230.4 S(enum-)514.45
+230.4 Q .282(bered to record number four)108 242.4 R 2.782(,a)-.4 G 2.782(sw)
+231.19 242.4 S .283(ell as the cursor)245.082 242.4 R 2.783(,i)-.4 G 2.783(fp)
+316.633 242.4 S .283(ositioned after record number one, to shift do)327.746
+242.4 R .283(wn one)-.25 F(record.)108 254.4 Q .373
+(The recno access method speci\214c data structure pro)108 271.2 R .373
+(vided to)-.15 F F3(dbopen)2.873 E F0 .373(is de\214ned in the <db)2.873 F .373
+(.h> include \214le as)-.4 F(follo)108 283.2 Q(ws:)-.25 E(typedef struct {)108
+300 Q(u_long \215ags;)144 312 Q(u_int cachesize;)144 324 Q(u_int psize;)144 336
+Q(int lorder;)144 348 Q(size_t reclen;)144 360 Q(u_char b)144 372 Q -.25(va)
+-.15 G(l;).25 E(char *bfname;)144 384 Q 2.5(}R)108 396 S(ECNOINFO;)121.97 396 Q
+(The elements of this structure are de\214ned as follo)108 412.8 Q(ws:)-.25 E
+14.61(\215ags The)108 429.6 R(\215ag v)2.5 E(alue is speci\214ed by)-.25 E F3
+(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)313.2 429.6 S(he follo)321.81
+429.6 Q(wing v)-.25 E(alues:)-.25 E(R_FIXEDLEN)144 446.4 Q .962
+(The records are \214x)180 458.4 R .963(ed-length, not byte delimited.)-.15 F
+.963(The structure element)5.963 F F3 -.37(re)3.463 G(clen).37 E F0
+(speci\214es)3.463 E .345(the length of the record, and the structure element)
+180 470.4 R F3(bval)2.844 E F0 .344(is used as the pad character)2.844 F 5.344
+(.A)-.55 G -.15(ny)530.15 470.4 S .739
+(records, inserted into the database, that are less than)180 482.4 R F3 -.37
+(re)3.239 G(clen).37 E F0 .74(bytes long are automatically)3.239 F(padded.)180
+494.4 Q(R_NOKEY)144 511.2 Q 2.34(In the interf)180 523.2 R 2.34
+(ace speci\214ed by)-.1 F F3(dbopen)4.84 E F0 4.84(,t).24 G 2.34
+(he sequential record retrie)344.98 523.2 R -.25(va)-.25 G 4.84<6c8c>.25 G 2.34
+(lls in both the)478.25 523.2 R(caller')180 535.2 Q 3.556(sk)-.55 G 1.357 -.15
+(ey a)217.336 535.2 T 1.057(nd data structures.).15 F 1.057
+(If the R_NOKEY \215ag is speci\214ed, the)6.057 F F3(cur)3.557 E(sor)-.1 E F0
+(routines)3.557 E .029(are not required to \214ll in the k)180 547.2 R .329
+-.15(ey s)-.1 H 2.529(tructure. This).15 F .028(permits applications to retrie)
+2.529 F .328 -.15(ve r)-.25 H .028(ecords at).15 F
+(the end of \214les without reading all of the interv)180 559.2 Q
+(ening records.)-.15 E(R_SN)144 576 Q(APSHO)-.35 E(T)-.4 E .964
+(This \215ag requires that a snapshot of the \214le be tak)180 588 R .965
+(en when)-.1 F F3(dbopen)3.465 E F0 .965(is called, instead of)3.465 F
+(permitting an)180 600 Q 2.5(yu)-.15 G
+(nmodi\214ed records to be read from the original \214le.)245.96 600 Q
+(cachesize)108 616.8 Q 3.16(As)144 628.8 S .66
+(uggested maximum size, in bytes, of the memory cache.)158.27 628.8 R .659
+(This v)5.659 F .659(alue is)-.25 F F2(only)3.159 E F0(advisory)3.159 E 3.159
+(,a)-.65 G .659(nd the)514.621 628.8 R .046
+(access method will allocate more memory rather than f)144 640.8 R 2.546
+(ail. If)-.1 F F3(cac)2.546 E(hesize)-.15 E F0 2.546(is 0)2.546 F .046
+(\(no size is speci\214ed\) a)2.546 F(def)144 652.8 Q(ault cache is used.)-.1 E
+12.95(psize The)108 669.6 R .715
+(recno access method stores the in-memory copies of its records in a btree.)
+3.216 F .715(This v)5.715 F .715(alue is the)-.25 F .805
+(size \(in bytes\) of the pages used for nodes in that tree.)144 681.6 R(If)
+5.805 E F3(psize)3.305 E F0 .806(is 0 \(no page size is speci\214ed\) a)3.305 F
+1.468
+(page size is chosen based on the underlying \214le system I/O block size.)144
+693.6 R(See)6.467 E F3(btr)3.967 E(ee)-.37 E F0 1.467(\(3\) for more).18 F
+(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 96.815
+(ution August)-.2 F(18, 1994)2.5 E(1)535 732 Q EP
+%%Page: 2 2
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 130.12(RECNO\(3\) BSD)72 48 R(Programmer')2.5 E 2.5(sM)
+-.55 G 130.12(anual RECNO\(3\))340.17 48 R(information.)144 84 Q 9.62
+(lorder The)108 100.8 R 1.596(byte order for inte)4.096 F 1.596
+(gers in the stored database metadata.)-.15 F 1.597
+(The number should represent the)6.597 F .689(order as an inte)144 112.8 R .689
+(ger; for e)-.15 F .689(xample, big endian order w)-.15 F .689
+(ould be the number 4,321.)-.1 F(If)5.689 E/F1 10/Times-Italic@0 SF(lor)3.189 E
+(der)-.37 E F0 .688(is 0 \(no)3.189 F
+(order is speci\214ed\) the current host order is used.)144 124.8 Q 9.07
+(reclen The)108 141.6 R(length of a \214x)2.5 E(ed-length record.)-.15 E -.15
+(bv)108 158.4 S 16.68(al The)-.1 F .182
+(delimiting byte to be used to mark the end of a record for v)2.682 F .183
+(ariable-length records, and the pad)-.25 F .809(character for \214x)144 170.4
+R .809(ed-length records.)-.15 F .809(If no v)5.809 F .809
+(alue is speci\214ed, ne)-.25 F .809(wlines \(`)-.25 F(`\\n')-.74 E .808
+('\) are used to mark the)-.74 F(end of v)144 182.4 Q
+(ariable-length records and \214x)-.25 E
+(ed-length records are padded with spaces.)-.15 E 3.51(bfname The)108 199.2 R
+.505
+(recno access method stores the in-memory copies of its records in a btree.)
+3.005 F .506(If bfname is non-)5.506 F .065(NULL, it speci\214es the name of t\
+he btree \214le, as if speci\214ed as the \214le name for a dbopen of a btree)
+144 211.2 R(\214le.)144 223.2 Q .971(The data part of the k)108 240 R -.15(ey)
+-.1 G .972(/data pair used by the recno access method is the same as other acc\
+ess methods.).15 F .199(The k)108 252 R .499 -.15(ey i)-.1 H 2.699(sd).15 G(if)
+157.507 252 Q 2.699(ferent. The)-.25 F F1(data)2.699 E F0 .199
+(\214eld of the k)2.699 F .499 -.15(ey s)-.1 H .198
+(hould be a pointer to a memory location of type).15 F F1 -.37(re)2.698 G
+(cno_t).37 E F0 2.698(,a).68 G(s)536.11 252 Q .505(de\214ned in the <db)108 264
+R .506(.h> include \214le.)-.4 F .506(This type is normally the lar)5.506 F
+.506(gest unsigned inte)-.18 F .506(gral type a)-.15 F -.25(va)-.2 G .506
+(ilable to the).25 F 2.5(implementation. The)108 276 R F1(size)2.5 E F0
+(\214eld of the k)2.5 E .3 -.15(ey s)-.1 H(hould be the size of that type.).15
+E .706(Because there can be no meta-data associated with the underlying recno \
+access method \214les, an)108 292.8 R 3.206(yc)-.15 G(hanges)512.23 292.8 Q
+1.262(made to the def)108 304.8 R 1.262(ault v)-.1 F 1.262(alues \(e.g. \214x)
+-.25 F 1.263(ed record length or byte separator v)-.15 F 1.263
+(alue\) must be e)-.25 F 1.263(xplicitly speci\214ed)-.15 F
+(each time the \214le is opened.)108 316.8 Q .065(In the interf)108 333.6 R
+.065(ace speci\214ed by)-.1 F F1(dbopen)2.564 E F0 2.564(,u).24 G .064
+(sing the)261.548 333.6 R F1(put)2.564 E F0(interf)2.564 E .064
+(ace to create a ne)-.1 F 2.564(wr)-.25 G .064
+(ecord will cause the creation of)414.44 333.6 R .755(multiple, empty records \
+if the record number is more than one greater than the lar)108 345.6 R .755
+(gest record currently in)-.18 F(the database.)108 357.6 Q/F2 9/Times-Bold@0 SF
+(ERR)72 374.4 Q(ORS)-.27 E F0(The)108 386.4 Q F1 -.37(re)2.922 G(cno).37 E F0
+.421(access method routines may f)2.921 F .421(ail and set)-.1 F F1(errno)2.921
+E F0 .421(for an)2.921 F 2.921(yo)-.15 G 2.921(ft)377.933 386.4 S .421
+(he errors speci\214ed for the library rou-)386.964 386.4 R(tine)108 398.4 Q F1
+(dbopen)2.5 E F0(\(3\) or the follo).24 E(wing:)-.25 E([EINV)108 415.2 Q(AL])
+-1.35 E(An attempt w)144 427.2 Q(as made to add a record to a \214x)-.1 E
+(ed-length database that w)-.15 E(as too lar)-.1 E(ge to \214t.)-.18 E F2
+(SEE ALSO)72 444 Q F1(btr)108 456 Q(ee)-.37 E F0(\(3\)).18 E F1(dbopen)2.5 E F0
+(\(3\),).24 E F1(hash)2.5 E F0(\(3\),).28 E F1(mpool)2.5 E F0(\(3\),).51 E F1
+2.754(Document Pr)108 480 R 2.754(ocessing in a Relational Database System)-.45
+F F0 5.255(,M).32 G 2.755(ichael Stonebrak)362.13 480 R(er)-.1 E 5.255(,H)-.4 G
+2.755(eidi Stettner)454.06 480 R 5.255(,J)-.4 G(oseph)516.67 480 Q
+(Kalash, Antonin Guttman, Nadene L)108 492 Q
+(ynn, Memorandum No. UCB/ERL M82/32, May 1982.)-.55 E F2 -.09(BU)72 508.8 S(GS)
+.09 E F0(Only big and little endian byte order is supported.)108 520.8 Q
+(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 96.815
+(ution August)-.2 F(18, 1994)2.5 E(2)535 732 Q EP
+%%Trailer
+end
+%%EOF
diff --git a/src/plugins/kdb/db2/libdb2/hash/Makefile.in b/src/plugins/kdb/db2/libdb2/hash/Makefile.in
new file mode 100644
index 0000000000..1e60e9a18c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/Makefile.in
@@ -0,0 +1,13 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/hash
+mydir=hash
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+STLIBOBJS=	hash.o hash_bigkey.o hash_debug.o hash_func.o hash_log2.o \
+		hash_page.o hsearch.o dbm.o
+
+LOCALINCLUDES=	-I. -I$(srcdir)/../include -I../include -I$(srcdir)/../mpool \
+		-I$(srcdir)/../db
+
+all-unix:: all-libobjs
+clean-unix:: clean-libobjs
+# @libobj_frag@
diff --git a/src/plugins/kdb/db2/libdb2/hash/Makefile.inc b/src/plugins/kdb/db2/libdb2/hash/Makefile.inc
new file mode 100644
index 0000000000..87746f721e
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/Makefile.inc
@@ -0,0 +1,6 @@
+#       @(#)Makefile.inc	8.2 (Berkeley) 11/7/95
+
+.PATH: ${.CURDIR}/db/hash
+
+SRCS+=	hash.c hash_bigkey.c hash_buf.c hash_func.c hash_log2.c \
+	hash_page.c hsearch.c dbm.c
diff --git a/src/plugins/kdb/db2/libdb2/hash/dbm.c b/src/plugins/kdb/db2/libdb2/hash/dbm.c
new file mode 100644
index 0000000000..58c9df7383
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/dbm.c
@@ -0,0 +1,356 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)dbm.c	8.6 (Berkeley) 11/7/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include "db-int.h"
+
+#include <sys/param.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "db-ndbm.h"
+#include "db-dbm.h"
+#include "hash.h"
+
+/* If the two size fields of datum and DBMT are not equal, then
+ * casting between structures will result in stack garbage being
+ * transfered. Has been observed for DEC Alpha OSF, but will handle
+ *  the general case.
+ */
+
+#define NEED_COPY
+
+/*
+ *
+ * This package provides dbm and ndbm compatible interfaces to DB.
+ * First are the DBM routines, which call the NDBM routines, and
+ * the NDBM routines, which call the DB routines.
+ */
+static DBM *__cur_db;
+
+static void no_open_db __P((void));
+
+int
+kdb2_dbminit(file)
+	char *file;
+{
+	if (__cur_db != NULL)
+		(void)kdb2_dbm_close(__cur_db);
+	if ((__cur_db = kdb2_dbm_open(file, O_RDWR|O_BINARY, 0)) != NULL)
+		return (0);
+	if ((__cur_db = kdb2_dbm_open(file, O_RDONLY|O_BINARY, 0)) != NULL)
+		return (0);
+	return (-1);
+}
+
+datum
+kdb2_fetch(key)
+	datum key;
+{
+	datum item;
+
+	if (__cur_db == NULL) {
+		no_open_db();
+		item.dptr = 0;
+		return (item);
+	}
+	return (kdb2_dbm_fetch(__cur_db, key));
+}
+
+datum
+kdb2_firstkey()
+{
+	datum item;
+
+	if (__cur_db == NULL) {
+		no_open_db();
+		item.dptr = 0;
+		return (item);
+	}
+	return (kdb2_dbm_firstkey(__cur_db));
+}
+
+datum
+kdb2_nextkey(key)
+	datum key;
+{
+	datum item;
+
+	if (__cur_db == NULL) {
+		no_open_db();
+		item.dptr = 0;
+		return (item);
+	}
+	return (kdb2_dbm_nextkey(__cur_db));
+}
+
+int
+kdb2_delete(key)
+	datum key;
+{
+	if (__cur_db == NULL) {
+		no_open_db();
+		return (-1);
+	}
+	return (kdb2_dbm_delete(__cur_db, key));
+}
+
+int
+kdb2_store(key, dat)
+	datum key, dat;
+{
+	if (__cur_db == NULL) {
+		no_open_db();
+		return (-1);
+	}
+	return (kdb2_dbm_store(__cur_db, key, dat, DBM_REPLACE));
+}
+
+static void
+no_open_db()
+{
+	(void)fprintf(stderr, "dbm: no open database.\n");
+}
+
+/*
+ * Returns:
+ * 	*DBM on success
+ *	 NULL on failure
+ */
+DBM *
+kdb2_dbm_open(file, flags, mode)
+	const char *file;
+	int flags, mode;
+{
+	HASHINFO info;
+	char path[MAXPATHLEN];
+
+	info.bsize = 4096;
+	info.ffactor = 40;
+	info.nelem = 1;
+	info.cachesize = 0;
+	info.hash = NULL;
+	info.lorder = 0;
+	(void)strncpy(path, file, sizeof(path) - 1);
+	path[sizeof(path) - 1] = '\0';
+	(void)strncat(path, DBM_SUFFIX, sizeof(path) - 1 - strlen(path));
+	return ((DBM *)__hash_open(path, flags, mode, &info, 0));
+}
+
+/*
+ * Returns:
+ *	Nothing.
+ */
+void
+kdb2_dbm_close(db)
+	DBM *db;
+{
+	(void)(db->close)(db);
+}
+
+/*
+ * Returns:
+ *	DATUM on success
+ *	NULL on failure
+ */
+datum
+kdb2_dbm_fetch(db, key)
+	DBM *db;
+	datum key;
+{
+	datum retval;
+	int status;
+
+#ifdef NEED_COPY
+	DBT k, r;
+
+	k.data = key.dptr;
+	k.size = key.dsize;
+	status = (db->get)(db, &k, &r, 0);
+	retval.dptr = r.data;
+	retval.dsize = r.size;
+#else
+	status = (db->get)(db, (DBT *)&key, (DBT *)&retval, 0);
+#endif
+	if (status) {
+		retval.dptr = NULL;
+		retval.dsize = 0;
+	}
+	return (retval);
+}
+
+/*
+ * Returns:
+ *	DATUM on success
+ *	NULL on failure
+ */
+datum
+kdb2_dbm_firstkey(db)
+	DBM *db;
+{
+	int status;
+	datum retkey;
+
+#ifdef NEED_COPY
+	DBT k, r;
+
+	status = (db->seq)(db, &k, &r, R_FIRST);
+	retkey.dptr = k.data;
+	retkey.dsize = k.size;
+#else
+	datum retdata;
+
+	status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_FIRST);
+#endif
+	if (status)
+		retkey.dptr = NULL;
+	return (retkey);
+}
+
+/*
+ * Returns:
+ *	DATUM on success
+ *	NULL on failure
+ */
+datum
+kdb2_dbm_nextkey(db)
+	DBM *db;
+{
+	int status;
+	datum retkey;
+
+#ifdef NEED_COPY
+	DBT k, r;
+
+	status = (db->seq)(db, &k, &r, R_NEXT);
+	retkey.dptr = k.data;
+	retkey.dsize = k.size;
+#else
+	datum retdata;
+
+	status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_NEXT);
+#endif
+	if (status)
+		retkey.dptr = NULL;
+	return (retkey);
+}
+
+/*
+ * Returns:
+ *	 0 on success
+ *	<0 failure
+ */
+int
+kdb2_dbm_delete(db, key)
+	DBM *db;
+	datum key;
+{
+	int status;
+
+#ifdef NEED_COPY
+	DBT k;
+
+	k.data = key.dptr;
+	k.size = key.dsize;
+	status = (db->del)(db, &k, 0);
+#else
+	status = (db->del)(db, (DBT *)&key, 0);
+#endif
+	if (status)
+		return (-1);
+	else
+		return (0);
+}
+
+/*
+ * Returns:
+ *	 0 on success
+ *	<0 failure
+ *	 1 if DBM_INSERT and entry exists
+ */
+int
+kdb2_dbm_store(db, key, content, flags)
+	DBM *db;
+	datum key, content;
+	int flags;
+{
+#ifdef NEED_COPY
+	DBT k, c;
+
+	k.data = key.dptr;
+	k.size = key.dsize;
+	c.data = content.dptr;
+	c.size = content.dsize;
+	return ((db->put)(db, &k, &c,
+	    (flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
+#else
+	return ((db->put)(db, (DBT *)&key, (DBT *)&content,
+	    (flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
+#endif
+}
+
+int
+kdb2_dbm_error(db)
+	DBM *db;
+{
+	HTAB *hp;
+
+	hp = (HTAB *)db->internal;
+	return (hp->local_errno);
+}
+
+int
+kdb2_dbm_clearerr(db)
+	DBM *db;
+{
+	HTAB *hp;
+
+	hp = (HTAB *)db->internal;
+	hp->local_errno = 0;
+	return (0);
+}
+
+int
+kdb2_dbm_dirfno(db)
+	DBM *db;
+{
+	return(((HTAB *)db->internal)->fp);
+}
diff --git a/src/plugins/kdb/db2/libdb2/hash/extern.h b/src/plugins/kdb/db2/libdb2/hash/extern.h
new file mode 100644
index 0000000000..872b6b0fef
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/extern.h
@@ -0,0 +1,109 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)extern.h	8.8 (Berkeley) 11/7/95
+ */
+
+#define __add_bigpage		__kdb2_add_bigpage
+#define __add_ovflpage		__kdb2_add_ovflpage
+#define __addel			__kdb2_addel
+#define __alloc_tmp		__kdb2_alloc_tmp
+#define __big_delete		__kdb2_big_delete
+#define __big_insert		__kdb2_big_insert
+#define __big_keydata		__kdb2_big_keydata
+#define __big_return		__kdb2_big_return
+#define __call_hash		__kdb2_call_hash
+#define __cursor_creat		__kdb2_cursor_creat
+#define __delete_page		__kdb2_delete_page
+#define __delpair		__kdb2_delpair
+#define __expand_table		__kdb2_expand_table
+#define __find_bigpair		__kdb2_find_bigpair
+#define __free_ovflpage		__kdb2_free_ovflpage
+#define __get_bigkey		__kdb2_get_bigkey
+#define __get_buf		__kdb2_get_buf
+#define __get_item		__kdb2_get_item
+#define __get_item_done		__kdb2_get_item_done
+#define __get_item_first	__kdb2_get_item_first
+#define __get_item_next		__kdb2_get_item_next
+#define __get_item_reset	__kdb2_get_item_reset
+#define __get_page		__kdb2_get_page
+#define __ibitmap		__kdb2_ibitmap
+#define __log2			__kdb2_log2
+#define __new_page		__kdb2_new_page
+#define __pgin_routine		__kdb2_pgin_routine
+#define __pgout_routine		__kdb2_pgout_routine
+#define __put_buf		__kdb2_put_buf
+#define __put_page		__kdb2_put_page
+#define __reclaim_tmp		__kdb2_reclaim_tmp
+#define __split_page		__kdb2_split_page
+
+PAGE16	 *__add_bigpage __P((HTAB *, PAGE16 *, indx_t, const u_int8_t));
+PAGE16	 *__add_ovflpage __P((HTAB *, PAGE16 *));
+int32_t	  __addel __P((HTAB *, ITEM_INFO *,
+		const DBT *, const DBT *, u_int32_t, const u_int8_t));
+u_int32_t __alloc_tmp __P((HTAB*));
+int32_t	  __big_delete __P((HTAB *, PAGE16 *, indx_t));
+int32_t	  __big_insert __P((HTAB *, PAGE16 *, const DBT *, const DBT *));
+int32_t	  __big_keydata __P((HTAB *, PAGE16 *, DBT *, DBT *, int32_t));
+int32_t	  __big_return __P((HTAB *, ITEM_INFO *, DBT *, int32_t));
+u_int32_t __call_hash __P((HTAB *, int8_t *, int32_t));
+CURSOR	 *__cursor_creat __P((const DB *));
+int32_t	  __delete_page __P((HTAB *, PAGE16 *, int32_t));
+int32_t	  __delpair __P((HTAB *, CURSOR *, ITEM_INFO *));
+int32_t	  __expand_table __P((HTAB *));
+int32_t	  __find_bigpair __P((HTAB *, CURSOR *, int8_t *, int32_t));
+void	  __free_ovflpage __P((HTAB *, PAGE16 *));
+int32_t	  __get_bigkey __P((HTAB *, PAGE16 *, indx_t, DBT *));
+PAGE16	 *__get_buf __P((HTAB *, u_int32_t, int32_t));
+u_int32_t __get_item __P((HTAB *, CURSOR *, DBT *, DBT *, ITEM_INFO *));
+u_int32_t __get_item_done __P((HTAB *, CURSOR *));
+u_int32_t __get_item_first __P((HTAB *, CURSOR *, DBT *, DBT *, ITEM_INFO *));
+u_int32_t __get_item_next __P((HTAB *, CURSOR *, DBT *, DBT *, ITEM_INFO *));
+u_int32_t __get_item_reset __P((HTAB *, CURSOR *));
+PAGE16	 *__get_page __P((HTAB *, u_int32_t, int32_t));
+int32_t	  __ibitmap __P((HTAB *, int32_t, int32_t, int32_t));
+u_int32_t __log2 __P((u_int32_t));
+int32_t	  __new_page __P((HTAB *, u_int32_t, int32_t));
+void	  __pgin_routine __P((void *, db_pgno_t, void *));
+void	  __pgout_routine __P((void *, db_pgno_t, void *));
+u_int32_t __put_buf __P((HTAB *, PAGE16 *, u_int32_t));
+int32_t	  __put_page __P((HTAB *, PAGE16 *, int32_t, int32_t));
+void	  __reclaim_tmp __P((HTAB *));
+int32_t	  __split_page __P((HTAB *, u_int32_t, u_int32_t));
+
+/* Default hash routine. */
+extern u_int32_t (*__default_hash) __P((const void *, size_t));
+
+#ifdef HASH_STATISTICS
+extern long hash_accesses, hash_bigpages, hash_collisions, hash_expansions;
+extern long hash_overflow;
+#endif
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash.c b/src/plugins/kdb/db2/libdb2/hash/hash.c
new file mode 100644
index 0000000000..0e254938e9
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash.c
@@ -0,0 +1,1068 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash.c	8.12 (Berkeley) 11/7/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#ifdef DEBUG
+#include <assert.h>
+#endif
+
+#include "db-int.h"
+#include "hash.h"
+#include "page.h"
+#include "extern.h"
+
+static int32_t flush_meta __P((HTAB *));
+static int32_t hash_access __P((HTAB *, ACTION, const DBT *, DBT *));
+static int32_t hash_close __P((DB *));
+static int32_t hash_delete __P((const DB *, const DBT *, u_int32_t));
+static int32_t hash_fd __P((const DB *));
+static int32_t hash_get __P((const DB *, const DBT *, DBT *, u_int32_t));
+static int32_t hash_put __P((const DB *, DBT *, const DBT *, u_int32_t));
+static int32_t hash_seq __P((const DB *, DBT *, DBT *, u_int32_t));
+static int32_t hash_sync __P((const DB *, u_int32_t));
+static int32_t hdestroy __P((HTAB *));
+static int32_t cursor_get __P((const DB *, CURSOR *, DBT *, DBT *, \
+	u_int32_t));
+static int32_t cursor_delete __P((const DB *, CURSOR *, u_int32_t));
+static HTAB *init_hash __P((HTAB *, const char *, const HASHINFO *));
+static int32_t init_htab __P((HTAB *, int32_t));
+#if DB_BYTE_ORDER == DB_LITTLE_ENDIAN
+static void swap_header __P((HTAB *));
+static void swap_header_copy __P((HASHHDR *, HASHHDR *));
+#endif
+static u_int32_t hget_header __P((HTAB *, u_int32_t));
+static void hput_header __P((HTAB *));
+
+#define RETURN_ERROR(ERR, LOC)	{ save_errno = ERR; goto LOC; }
+
+/* Return values */
+#define	SUCCESS	 (0)
+#define	ERROR	(-1)
+#define	ABNORMAL (1)
+
+#ifdef HASH_STATISTICS
+u_int32_t hash_accesses, hash_collisions, hash_expansions, hash_overflows,
+	hash_bigpages;
+#endif
+
+/************************** INTERFACE ROUTINES ***************************/
+/* OPEN/CLOSE */
+
+extern DB *
+__kdb2_hash_open(file, flags, mode, info, dflags)
+	const char *file;
+	int32_t flags, mode, dflags;
+	const HASHINFO *info;	/* Special directives for create */
+{
+	struct stat statbuf;
+	DB *dbp;
+	DBT mpool_key;
+	HTAB *hashp;
+	int32_t bpages, csize, new_table, save_errno, specified_file;
+
+	if ((flags & O_ACCMODE) == O_WRONLY) {
+		errno = EINVAL;
+		return (NULL);
+	}
+	if (!(hashp = (HTAB *)calloc(1, sizeof(HTAB))))
+		return (NULL);
+	hashp->fp = -1;
+
+	/* set this now, before file goes away... */
+	specified_file = (file != NULL);
+	if (!file) {
+		file = tmpnam(NULL);
+		/* store the file name so that we can unlink it later */
+		hashp->fname = file;
+#ifdef DEBUG
+		fprintf(stderr, "Using file name %s.\n", file);
+#endif
+	}
+	/*
+	 * Even if user wants write only, we need to be able to read
+	 * the actual file, so we need to open it read/write. But, the
+	 * field in the hashp structure needs to be accurate so that
+	 * we can check accesses.
+	 */
+	hashp->flags = flags;
+	hashp->save_file = specified_file && (hashp->flags & O_RDWR);
+
+	new_table = 0;
+	if (!file || (flags & O_TRUNC) ||
+	    (stat(file, &statbuf) && (errno == ENOENT))) {
+		if (errno == ENOENT)
+			errno = 0;	/* In case someone looks at errno. */
+		new_table = 1;
+	}
+	if (file) {
+		if ((hashp->fp = open(file, flags|O_BINARY, mode)) == -1)
+			RETURN_ERROR(errno, error0);
+		(void)fcntl(hashp->fp, F_SETFD, 1);
+	}
+
+	/* Process arguments to set up hash table header. */
+	if (new_table) {
+		if (!(hashp = init_hash(hashp, file, info)))
+			RETURN_ERROR(errno, error1);
+	} else {
+		/* Table already exists */
+		if (info && info->hash)
+			hashp->hash = info->hash;
+		else
+			hashp->hash = __default_hash;
+
+		/* copy metadata from page into header */
+		if (hget_header(hashp,
+		    (info && info->bsize ? info->bsize : DEF_BUCKET_SIZE)) !=
+		    sizeof(HASHHDR))
+			RETURN_ERROR(EFTYPE, error1);
+
+		/* Verify file type, versions and hash function */
+		if (hashp->hdr.magic != HASHMAGIC)
+			RETURN_ERROR(EFTYPE, error1);
+#define	OLDHASHVERSION	1
+		if (hashp->hdr.version != HASHVERSION &&
+		    hashp->hdr.version != OLDHASHVERSION)
+			RETURN_ERROR(EFTYPE, error1);
+		if (hashp->hash(CHARKEY, sizeof(CHARKEY))
+		    != hashp->hdr.h_charkey)
+			RETURN_ERROR(EFTYPE, error1);
+		/*
+		 * Figure out how many segments we need.  Max_Bucket is the
+		 * maximum bucket number, so the number of buckets is
+		 * max_bucket + 1.
+		 */
+
+		/* Read in bitmaps */
+		bpages = (hashp->hdr.spares[hashp->hdr.ovfl_point] +
+		    (hashp->hdr.bsize << BYTE_SHIFT) - 1) >>
+		    (hashp->hdr.bshift + BYTE_SHIFT);
+
+		hashp->nmaps = bpages;
+		(void)memset(&hashp->mapp[0], 0, bpages * sizeof(u_int32_t *));
+	}
+
+	/* start up mpool */
+	mpool_key.data = (u_int8_t *)file;
+	mpool_key.size = strlen(file);
+
+	if (info && info->cachesize)
+		csize = info->cachesize / hashp->hdr.bsize;
+	else
+		csize = DEF_CACHESIZE / hashp->hdr.bsize;
+	hashp->mp = mpool_open(&mpool_key, hashp->fp, hashp->hdr.bsize, csize);
+
+	if (!hashp->mp)
+		RETURN_ERROR(errno, error1);
+	mpool_filter(hashp->mp, __pgin_routine, __pgout_routine, hashp);
+
+	/*
+	 * For a new table, set up the bitmaps.
+	 */
+	if (new_table &&
+	   init_htab(hashp, info && info->nelem ? info->nelem : 1))
+		goto error2;
+
+	/* initialize the cursor queue */
+	TAILQ_INIT(&hashp->curs_queue);
+	hashp->seq_cursor = NULL;
+
+
+	/* get a chunk of memory for our split buffer */
+	hashp->split_buf = (PAGE16 *)malloc(hashp->hdr.bsize);
+	if (!hashp->split_buf)
+		goto error2;
+
+	hashp->new_file = new_table;
+
+	if (!(dbp = (DB *)malloc(sizeof(DB))))
+		goto error2;
+
+	dbp->internal = hashp;
+	dbp->close = hash_close;
+	dbp->del = hash_delete;
+	dbp->fd = hash_fd;
+	dbp->get = hash_get;
+	dbp->put = hash_put;
+	dbp->seq = hash_seq;
+	dbp->sync = hash_sync;
+	dbp->type = DB_HASH;
+
+#ifdef DEBUG
+	(void)fprintf(stderr,
+	    "%s\n%s%lx\n%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n%s%x\n%s%x\n%s%d\n%s%d\n",
+	    "init_htab:",
+	    "TABLE POINTER   ", (void *)hashp,
+	    "BUCKET SIZE     ", hashp->hdr.bsize,
+	    "BUCKET SHIFT    ", hashp->hdr.bshift,
+	    "FILL FACTOR     ", hashp->hdr.ffactor,
+	    "MAX BUCKET      ", hashp->hdr.max_bucket,
+	    "OVFL POINT      ", hashp->hdr.ovfl_point,
+	    "LAST FREED      ", hashp->hdr.last_freed,
+	    "HIGH MASK       ", hashp->hdr.high_mask,
+	    "LOW  MASK       ", hashp->hdr.low_mask,
+	    "NKEYS           ", hashp->hdr.nkeys);
+#endif
+#ifdef HASH_STATISTICS
+	hash_overflows = hash_accesses = hash_collisions = hash_expansions = 0;
+	hash_bigpages = 0;
+#endif
+	return (dbp);
+
+error2:
+	save_errno = errno;
+	hdestroy(hashp);
+	errno = save_errno;
+	return (NULL);
+
+error1:
+	if (hashp != NULL)
+		(void)close(hashp->fp);
+
+error0:
+	free(hashp);
+	errno = save_errno;
+	return (NULL);
+}
+
+static int32_t
+hash_close(dbp)
+	DB *dbp;
+{
+	HTAB *hashp;
+	int32_t retval;
+
+	if (!dbp)
+		return (ERROR);
+
+	hashp = (HTAB *)dbp->internal;
+	retval = hdestroy(hashp);
+	free(dbp);
+	return (retval);
+}
+
+static int32_t
+hash_fd(dbp)
+	const DB *dbp;
+{
+	HTAB *hashp;
+
+	if (!dbp)
+		return (ERROR);
+
+	hashp = (HTAB *)dbp->internal;
+	if (hashp->fp == -1) {
+		errno = ENOENT;
+		return (-1);
+	}
+	return (hashp->fp);
+}
+
+/************************** LOCAL CREATION ROUTINES **********************/
+static HTAB *
+init_hash(hashp, file, info)
+	HTAB *hashp;
+	const char *file;
+	const HASHINFO *info;
+{
+	struct stat statbuf;
+	int32_t nelem;
+
+	nelem = 1;
+	hashp->hdr.nkeys = 0;
+	hashp->hdr.lorder = DB_BYTE_ORDER;
+	hashp->hdr.bsize = DEF_BUCKET_SIZE;
+	hashp->hdr.bshift = DEF_BUCKET_SHIFT;
+	hashp->hdr.ffactor = DEF_FFACTOR;
+	hashp->hash = __default_hash;
+	memset(hashp->hdr.spares, 0, sizeof(hashp->hdr.spares));
+	memset(hashp->hdr.bitmaps, 0, sizeof(hashp->hdr.bitmaps));
+
+	/* Fix bucket size to be optimal for file system */
+	if (file != NULL) {
+		if (stat(file, &statbuf))
+			return (NULL);
+		hashp->hdr.bsize = statbuf.st_blksize;
+		hashp->hdr.bshift = __log2(hashp->hdr.bsize);
+	}
+	if (info) {
+		if (info->bsize) {
+			/* Round pagesize up to power of 2 */
+			hashp->hdr.bshift = __log2(info->bsize);
+			hashp->hdr.bsize = 1 << hashp->hdr.bshift;
+			if (hashp->hdr.bsize > MAX_BSIZE) {
+				errno = EINVAL;
+				return (NULL);
+			}
+		}
+		if (info->ffactor)
+			hashp->hdr.ffactor = info->ffactor;
+		if (info->hash)
+			hashp->hash = info->hash;
+		if (info->lorder) {
+			if ((info->lorder != DB_BIG_ENDIAN) &&
+			    (info->lorder != DB_LITTLE_ENDIAN)) {
+				errno = EINVAL;
+				return (NULL);
+			}
+			hashp->hdr.lorder = info->lorder;
+		}
+	}
+	return (hashp);
+}
+
+/*
+ * Returns 0 on No Error
+ */
+static int32_t
+init_htab(hashp, nelem)
+	HTAB *hashp;
+	int32_t nelem;
+{
+	int32_t l2, nbuckets;
+
+	/*
+	 * Divide number of elements by the fill factor and determine a
+	 * desired number of buckets.  Allocate space for the next greater
+	 * power of two number of buckets.
+	 */
+	nelem = (nelem - 1) / hashp->hdr.ffactor + 1;
+
+	l2 = __log2(MAX(nelem, 2));
+	nbuckets = 1 << l2;
+
+	hashp->hdr.spares[l2] = l2 + 1;
+	hashp->hdr.spares[l2 + 1] = l2 + 1;
+	hashp->hdr.ovfl_point = l2;
+	hashp->hdr.last_freed = 2;
+
+	hashp->hdr.max_bucket = hashp->hdr.low_mask = nbuckets - 1;
+	hashp->hdr.high_mask = (nbuckets << 1) - 1;
+
+	/*
+	 * The number of header pages is the size of the header divided by
+	 * the amount of freespace on header pages (the page size - the
+	 * size of 1 integer where the length of the header info on that
+	 * page is stored) plus another page if it didn't divide evenly.
+	 */
+	hashp->hdr.hdrpages =
+	    (sizeof(HASHHDR) / (hashp->hdr.bsize - HEADER_OVERHEAD)) +
+	    (((sizeof(HASHHDR) % (hashp->hdr.bsize - HEADER_OVERHEAD)) == 0)
+	    ? 0 : 1);
+
+	/* Create pages for these buckets */
+	/*
+	for (i = 0; i <= hashp->hdr.max_bucket; i++) {
+		if (__new_page(hashp, (u_int32_t)i, A_BUCKET) != 0)
+			return (-1);
+	}
+	*/
+
+	/* First bitmap page is at: splitpoint l2 page offset 1 */
+	if (__ibitmap(hashp, OADDR_OF(l2, 1), l2 + 1, 0))
+		return (-1);
+
+	return (0);
+}
+
+/*
+ * Functions to get/put hash header.  We access the file directly.
+ */
+static u_int32_t
+hget_header(hashp, page_size)
+	HTAB *hashp;
+	u_int32_t page_size;
+{
+	u_int32_t num_copied, i;
+	u_int8_t *hdr_dest;
+
+	num_copied = 0;
+	i = 0;
+
+	hdr_dest = (u_int8_t *)&hashp->hdr;
+
+	/* 
+	 * XXX
+	 * This should not be printing to stderr on a "normal" error case.
+	 */
+	lseek(hashp->fp, 0, SEEK_SET);
+	num_copied = read(hashp->fp, hdr_dest, sizeof(HASHHDR));
+	if (num_copied != sizeof(HASHHDR)) {
+		fprintf(stderr, "hash: could not retrieve header");
+		return (0);
+	}
+#if DB_BYTE_ORDER == DB_LITTLE_ENDIAN
+	swap_header(hashp);
+#endif
+	return (num_copied);
+}
+
+static void
+hput_header(hashp)
+	HTAB *hashp;
+{
+	HASHHDR *whdrp;
+#if DB_BYTE_ORDER == DB_LITTLE_ENDIAN
+	HASHHDR whdr;
+#endif
+	u_int32_t num_copied, i;
+
+	num_copied = i = 0;
+
+	whdrp = &hashp->hdr;
+#if DB_BYTE_ORDER == DB_LITTLE_ENDIAN
+	whdrp = &whdr;
+	swap_header_copy(&hashp->hdr, whdrp);
+#endif
+
+	lseek(hashp->fp, 0, SEEK_SET);
+	num_copied = write(hashp->fp, whdrp, sizeof(HASHHDR));
+	if (num_copied != sizeof(HASHHDR))
+		(void)fprintf(stderr, "hash: could not write hash header");
+	return;
+}
+
+/********************** DESTROY/CLOSE ROUTINES ************************/
+
+/*
+ * Flushes any changes to the file if necessary and destroys the hashp
+ * structure, freeing all allocated space.
+ */
+static int32_t
+hdestroy(hashp)
+	HTAB *hashp;
+{
+	int32_t save_errno;
+
+	save_errno = 0;
+
+#ifdef HASH_STATISTICS
+	{ int i;
+	(void)fprintf(stderr, "hdestroy: accesses %ld collisions %ld\n",
+	    hash_accesses, hash_collisions);
+	(void)fprintf(stderr,
+	    "hdestroy: expansions %ld\n", hash_expansions);
+	(void)fprintf(stderr,
+	    "hdestroy: overflows %ld\n", hash_overflows);
+	(void)fprintf(stderr,
+	    "hdestroy: big key/data pages %ld\n", hash_bigpages);
+	(void)fprintf(stderr,
+	    "keys %ld maxp %d\n", hashp->hdr.nkeys, hashp->hdr.max_bucket);
+
+	for (i = 0; i < NCACHED; i++)
+		(void)fprintf(stderr,
+		    "spares[%d] = %d\n", i, hashp->hdr.spares[i]);
+	}
+#endif
+
+	if (flush_meta(hashp) && !save_errno)
+		save_errno = errno;
+
+	/* Free the split page */
+	if (hashp->split_buf)
+		free(hashp->split_buf);
+
+	/* Free the big key and big data returns */
+	if (hashp->bigkey_buf)
+		free(hashp->bigkey_buf);
+	if (hashp->bigdata_buf)
+		free(hashp->bigdata_buf);
+ 
+	/* XXX This should really iterate over the cursor queue, but
+	   it's not clear how to do that, and the only cursor a hash
+	   table ever creates is the one used by hash_seq().  Passing
+	   NULL as the first arg is also a kludge, but I know that
+	   it's never used, so I do it.  The intent is to plug the
+	   memory leak.  Correctness can come later. */
+ 
+	if (hashp->seq_cursor)
+		hashp->seq_cursor->delete(NULL, hashp->seq_cursor, 0);
+
+	/* shut down mpool */
+	mpool_sync(hashp->mp);
+	mpool_close(hashp->mp);
+
+	if (hashp->fp != -1)
+		(void)close(hashp->fp);
+
+	/* 
+	 * *** This may cause problems if hashp->fname is set in any case
+	 * other than the case that we are generating a temporary file name.
+	 * Note that the new version of mpool should support temporary
+	 * files within mpool itself.
+	 */
+	if (hashp->fname && !hashp->save_file) {
+#ifdef DEBUG
+		fprintf(stderr, "Unlinking file %s.\n", hashp->fname);
+#endif
+		/* we need to chmod the file to allow it to be deleted... */
+		chmod(hashp->fname, 0700);
+		unlink(hashp->fname);
+		/* destroy the temporary name */
+		tmpnam(NULL);
+	}
+	free(hashp);
+
+	if (save_errno) {
+		errno = save_errno;
+		return (ERROR);
+	}
+	return (SUCCESS);
+}
+
+/*
+ * Write modified pages to disk
+ *
+ * Returns:
+ *	 0 == OK
+ *	-1 ERROR
+ */
+static int32_t
+hash_sync(dbp, flags)
+	const DB *dbp;
+	u_int32_t flags;
+{
+	HTAB *hashp;
+
+	hashp = (HTAB *)dbp->internal;
+
+	/*
+	 * XXX
+	 * Check success/failure conditions.
+	 */
+	return (flush_meta(hashp) || mpool_sync(hashp->mp));
+}
+
+/*
+ * Returns:
+ *	 0 == OK
+ *	-1 indicates that errno should be set
+ */
+static int32_t
+flush_meta(hashp)
+	HTAB *hashp;
+{
+	int32_t i;
+
+	if (!hashp->save_file)
+		return (0);
+	hashp->hdr.magic = HASHMAGIC;
+	hashp->hdr.version = HASHVERSION;
+	hashp->hdr.h_charkey = hashp->hash(CHARKEY, sizeof(CHARKEY));
+
+	/* write out metadata */
+	hput_header(hashp);
+
+	for (i = 0; i < NCACHED; i++)
+		if (hashp->mapp[i]) {
+			if (__put_page(hashp,
+			    (PAGE16 *)hashp->mapp[i], A_BITMAP, 1))
+				return (-1);
+			hashp->mapp[i] = NULL;
+		}
+	return (0);
+}
+
+/*******************************SEARCH ROUTINES *****************************/
+/*
+ * All the access routines return
+ *
+ * Returns:
+ *	 0 on SUCCESS
+ *	 1 to indicate an external ERROR (i.e. key not found, etc)
+ *	-1 to indicate an internal ERROR (i.e. out of memory, etc)
+ */
+
+/* *** make sure this is true! */
+
+static int32_t
+hash_get(dbp, key, data, flag)
+	const DB *dbp;
+	const DBT *key;
+	DBT *data;
+	u_int32_t flag;
+{
+	HTAB *hashp;
+
+	hashp = (HTAB *)dbp->internal;
+	if (flag) {
+		hashp->local_errno = errno = EINVAL;
+		return (ERROR);
+	}
+	return (hash_access(hashp, HASH_GET, key, data));
+}
+
+static int32_t
+hash_put(dbp, key, data, flag)
+	const DB *dbp;
+	DBT *key;
+	const DBT *data;
+	u_int32_t flag;
+{
+	HTAB *hashp;
+
+	hashp = (HTAB *)dbp->internal;
+	if (flag && flag != R_NOOVERWRITE) {
+		hashp->local_errno = errno = EINVAL;
+		return (ERROR);
+	}
+	if ((hashp->flags & O_ACCMODE) == O_RDONLY) {
+		hashp->local_errno = errno = EPERM;
+		return (ERROR);
+	}
+	return (hash_access(hashp, flag == R_NOOVERWRITE ?
+		HASH_PUTNEW : HASH_PUT, key, (DBT *)data));
+}
+
+static int32_t
+hash_delete(dbp, key, flag)
+	const DB *dbp;
+	const DBT *key;
+	u_int32_t flag;		/* Ignored */
+{
+	HTAB *hashp;
+
+	hashp = (HTAB *)dbp->internal;
+	if (flag) {
+		hashp->local_errno = errno = EINVAL;
+		return (ERROR);
+	}
+	if ((hashp->flags & O_ACCMODE) == O_RDONLY) {
+		hashp->local_errno = errno = EPERM;
+		return (ERROR);
+	}
+
+	return (hash_access(hashp, HASH_DELETE, key, NULL));
+}
+
+/*
+ * Assume that hashp has been set in wrapper routine.
+ */
+static int32_t
+hash_access(hashp, action, key, val)
+	HTAB *hashp;
+	ACTION action;
+	const DBT *key;
+	DBT *val;
+{
+	DBT page_key, page_val;
+	CURSOR cursor;
+	ITEM_INFO item_info;
+	u_int32_t bucket;
+	u_int32_t num_items;
+
+#ifdef HASH_STATISTICS
+	hash_accesses++;
+#endif
+
+	num_items = 0;
+
+	/* 
+	 * Set up item_info so that we're looking for space to add an item
+	 * as we cycle through the pages looking for the key.
+	 */
+	if (action == HASH_PUT || action == HASH_PUTNEW) {
+		if (ISBIG(key->size + val->size, hashp))
+			item_info.seek_size = PAIR_OVERHEAD;
+		else
+			item_info.seek_size = key->size + val->size;
+	} else
+		item_info.seek_size = 0;
+	item_info.seek_found_page = 0;
+
+	bucket = __call_hash(hashp, (int8_t *)key->data, key->size);
+
+	cursor.pagep = NULL;
+	__get_item_reset(hashp, &cursor);
+
+	cursor.bucket = bucket;
+	while (1) {
+		__get_item_next(hashp, &cursor, &page_key, &page_val, &item_info);
+		if (item_info.status == ITEM_ERROR)
+			return (ABNORMAL);
+		if (item_info.status == ITEM_NO_MORE)
+			break;
+		num_items++;
+		if (item_info.key_off == BIGPAIR) {
+			/*
+			 * !!!
+			 * 0 is a valid index.
+			 */
+			if (__find_bigpair(hashp, &cursor, (int8_t *)key->data,
+			    key->size) > 0)
+				goto found;
+		} else if (key->size == page_key.size &&
+		    !memcmp(key->data, page_key.data, key->size))
+			goto found;
+	}
+#ifdef HASH_STATISTICS
+	hash_collisions++;
+#endif
+	__get_item_done(hashp, &cursor);
+
+	/*
+	 * At this point, item_info will list either the last page in
+	 * the chain, or the last page in the chain plus a pgno for where
+	 * to find the first page in the chain with space for the
+	 * item we wish to add.
+	 */
+
+	/* Not found */
+	switch (action) {
+	case HASH_PUT:
+	case HASH_PUTNEW:
+		if (__addel(hashp, &item_info, key, val, num_items, 0))
+			return (ERROR);
+		break;
+	case HASH_GET:
+	case HASH_DELETE:
+	default:
+		return (ABNORMAL);
+	}
+
+	if (item_info.caused_expand)
+		__expand_table(hashp);
+	return (SUCCESS);
+
+found:	__get_item_done(hashp, &cursor);
+
+	switch (action) {
+	case HASH_PUTNEW:
+		/* mpool_put(hashp->mp, pagep, 0); */
+		return (ABNORMAL);
+	case HASH_GET:
+		if (item_info.key_off == BIGPAIR) {
+			if (__big_return(hashp, &item_info, val, 0))
+				return (ERROR);
+		} else {
+			val->data = page_val.data;
+			val->size = page_val.size;
+		}
+		/* *** data may not be available! */
+		break;
+	case HASH_PUT:
+		if (__delpair(hashp, &cursor, &item_info) ||
+		    __addel(hashp, &item_info, key, val, UNKNOWN, 0))
+			return (ERROR);
+		__get_item_done(hashp, &cursor);
+		if (item_info.caused_expand)
+			__expand_table(hashp);
+		break;
+	case HASH_DELETE:
+		if (__delpair(hashp, &cursor, &item_info))
+			return (ERROR);
+		break;
+	default:
+		abort();
+	}
+	return (SUCCESS);
+}
+
+/* ****************** CURSORS ********************************** */
+CURSOR *
+__cursor_creat(dbp)
+	const DB *dbp;
+{
+	CURSOR *new_curs;
+	HTAB *hashp;
+
+	new_curs = (CURSOR *)malloc(sizeof(struct cursor_t));
+	if (!new_curs)
+		return NULL;
+	new_curs->internal =
+	    (struct item_info *)malloc(sizeof(struct item_info));
+	if (!new_curs->internal) {
+		free(new_curs);
+		return NULL;
+	}
+	new_curs->get = cursor_get;
+	new_curs->delete = cursor_delete;
+
+	new_curs->bucket = 0;
+	new_curs->pgno = INVALID_PGNO;
+	new_curs->ndx = 0;
+	new_curs->pgndx = 0;
+	new_curs->pagep = NULL;
+
+	/* place onto queue of cursors */
+	hashp = (HTAB *)dbp->internal;
+	TAILQ_INSERT_TAIL(&hashp->curs_queue, new_curs, queue);
+
+	return new_curs;
+}
+
+static int32_t
+cursor_get(dbp, cursorp, key, val, flags)
+	const DB *dbp;
+	CURSOR *cursorp;
+	DBT *key, *val;
+	u_int32_t flags;
+{
+	HTAB *hashp;
+	ITEM_INFO item_info;
+
+	hashp = (HTAB *)dbp->internal;
+
+	if (flags && flags != R_FIRST && flags != R_NEXT) {
+		hashp->local_errno = errno = EINVAL;
+		return (ERROR);
+	}
+#ifdef HASH_STATISTICS
+	hash_accesses++;
+#endif
+
+	item_info.seek_size = 0;
+
+	if (flags == R_FIRST)
+		__get_item_first(hashp, cursorp, key, val, &item_info);
+	else
+		__get_item_next(hashp, cursorp, key, val, &item_info);
+
+	/*
+	 * This needs to be changed around.  As is, get_item_next advances
+	 * the pointers on the page but this function actually advances
+	 * bucket pointers.  This works, since the only other place we 
+	 * use get_item_next is in hash_access which only deals with one
+	 * bucket at a time.  However, there is the problem that certain other
+	 * functions (such as find_bigpair and delpair) depend on the
+	 * pgndx member of the cursor.  Right now, they are using pngdx - 1
+	 * since indices refer to the __next__ item that is to be fetched
+	 * from the page.  This is ugly, as you may have noticed, whoever
+	 * you are.  The best solution would be to depend on item_infos to
+	 * deal with _current_ information, and have the cursors only
+	 * deal with _next_ information.  In that scheme, get_item_next
+	 * would also advance buckets.  Version 3...
+	 */
+
+
+	/*
+	 * Must always enter this loop to do error handling and
+	 * check for big key/data pair.
+	 */
+	while (1) {
+		if (item_info.status == ITEM_OK) {
+			if (item_info.key_off == BIGPAIR &&
+			    __big_keydata(hashp, cursorp->pagep, key, val,
+			    item_info.pgndx))
+				return (ABNORMAL);
+
+			break;
+		} else if (item_info.status != ITEM_NO_MORE)
+			return (ABNORMAL);
+
+		__put_page(hashp, cursorp->pagep, A_RAW, 0);
+		cursorp->ndx = cursorp->pgndx = 0;
+		cursorp->bucket++;
+		cursorp->pgno = INVALID_PGNO;
+		cursorp->pagep = NULL;
+		if (cursorp->bucket > hashp->hdr.max_bucket)
+			return (ABNORMAL);
+		__get_item_next(hashp, cursorp, key, val, &item_info);
+	}
+
+	__get_item_done(hashp, cursorp);
+	return (0);
+}
+
+static int32_t
+cursor_delete(dbp, cursor, flags)
+	const DB *dbp;
+	CURSOR *cursor;
+	u_int32_t flags;
+{
+	/* XXX this is empirically determined, so it might not be completely
+	   correct, but it seems to work.  At the very least it fixes
+	   a memory leak */
+ 
+	free(cursor->internal);
+	free(cursor);
+
+	return (0);
+}
+
+static int32_t
+hash_seq(dbp, key, val, flag)
+	const DB *dbp;
+	DBT *key, *val;
+	u_int32_t flag;
+{
+	HTAB *hashp;
+
+	/*
+	 * Seq just uses the default cursor to go sequecing through the
+	 * database.  Note that the default cursor is the first in the list. 
+	 */
+
+	hashp = (HTAB *)dbp->internal;
+	if (!hashp->seq_cursor)
+		hashp->seq_cursor = __cursor_creat(dbp);
+
+	return (hashp->seq_cursor->get(dbp, hashp->seq_cursor, key, val, flag));
+}
+
+/********************************* UTILITIES ************************/
+
+/*
+ * Returns:
+ *	 0 ==> OK
+ *	-1 ==> Error
+ */
+int32_t
+__expand_table(hashp)
+	HTAB *hashp;
+{
+	u_int32_t old_bucket, new_bucket;
+	int32_t spare_ndx;
+
+#ifdef HASH_STATISTICS
+	hash_expansions++;
+#endif
+	new_bucket = ++hashp->hdr.max_bucket;
+	old_bucket = (hashp->hdr.max_bucket & hashp->hdr.low_mask);
+
+	/* Get a page for this new bucket */
+	if (__new_page(hashp, new_bucket, A_BUCKET) != 0)
+		return (-1);
+
+	/*
+	 * If the split point is increasing (hdr.max_bucket's log base 2
+	 * increases), we need to copy the current contents of the spare
+	 * split bucket to the next bucket.
+	 */
+	spare_ndx = __log2(hashp->hdr.max_bucket + 1);
+	if (spare_ndx > hashp->hdr.ovfl_point) {
+		hashp->hdr.spares[spare_ndx] = hashp->hdr.spares[hashp->hdr.ovfl_point];
+		hashp->hdr.ovfl_point = spare_ndx;
+	}
+	if (new_bucket > hashp->hdr.high_mask) {
+		/* Starting a new doubling */
+		hashp->hdr.low_mask = hashp->hdr.high_mask;
+		hashp->hdr.high_mask = new_bucket | hashp->hdr.low_mask;
+	}
+	if (BUCKET_TO_PAGE(new_bucket) > MAX_PAGES(hashp)) {
+		fprintf(stderr, "hash: Cannot allocate new bucket.  Pages exhausted.\n");
+		return (-1);
+	}
+	/* Relocate records to the new bucket */
+	return (__split_page(hashp, old_bucket, new_bucket));
+}
+
+u_int32_t
+__call_hash(hashp, k, len)
+	HTAB *hashp;
+	int8_t *k;
+	int32_t len;
+{
+	int32_t n, bucket;
+
+	n = hashp->hash(k, len);
+	bucket = n & hashp->hdr.high_mask;
+	if (bucket > hashp->hdr.max_bucket)
+		bucket = bucket & hashp->hdr.low_mask;
+	return (bucket);
+}
+
+#if DB_BYTE_ORDER == DB_LITTLE_ENDIAN
+/*
+ * Hashp->hdr needs to be byteswapped.
+ */
+static void
+swap_header_copy(srcp, destp)
+	HASHHDR *srcp, *destp;
+{
+	int32_t i;
+
+	P_32_COPY(srcp->magic, destp->magic);
+	P_32_COPY(srcp->version, destp->version);
+	P_32_COPY(srcp->lorder, destp->lorder);
+	P_32_COPY(srcp->bsize, destp->bsize);
+	P_32_COPY(srcp->bshift, destp->bshift);
+	P_32_COPY(srcp->ovfl_point, destp->ovfl_point);
+	P_32_COPY(srcp->last_freed, destp->last_freed);
+	P_32_COPY(srcp->max_bucket, destp->max_bucket);
+	P_32_COPY(srcp->high_mask, destp->high_mask);
+	P_32_COPY(srcp->low_mask, destp->low_mask);
+	P_32_COPY(srcp->ffactor, destp->ffactor);
+	P_32_COPY(srcp->nkeys, destp->nkeys);
+	P_32_COPY(srcp->hdrpages, destp->hdrpages);
+	P_32_COPY(srcp->h_charkey, destp->h_charkey);
+	for (i = 0; i < NCACHED; i++) {
+		P_32_COPY(srcp->spares[i], destp->spares[i]);
+		P_16_COPY(srcp->bitmaps[i], destp->bitmaps[i]);
+	}
+}
+
+static void
+swap_header(hashp)
+	HTAB *hashp;
+{
+	HASHHDR *hdrp;
+	int32_t i;
+
+	hdrp = &hashp->hdr;
+
+	M_32_SWAP(hdrp->magic);
+	M_32_SWAP(hdrp->version);
+	M_32_SWAP(hdrp->lorder);
+	M_32_SWAP(hdrp->bsize);
+	M_32_SWAP(hdrp->bshift);
+	M_32_SWAP(hdrp->ovfl_point);
+	M_32_SWAP(hdrp->last_freed);
+	M_32_SWAP(hdrp->max_bucket);
+	M_32_SWAP(hdrp->high_mask);
+	M_32_SWAP(hdrp->low_mask);
+	M_32_SWAP(hdrp->ffactor);
+	M_32_SWAP(hdrp->nkeys);
+	M_32_SWAP(hdrp->hdrpages);
+	M_32_SWAP(hdrp->h_charkey);
+	for (i = 0; i < NCACHED; i++) {
+		M_32_SWAP(hdrp->spares[i]);
+		M_16_SWAP(hdrp->bitmaps[i]);
+	}
+}
+#endif /* DB_BYTE_ORDER == DB_LITTLE_ENDIAN */
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash.c.patch b/src/plugins/kdb/db2/libdb2/hash/hash.c.patch
new file mode 100644
index 0000000000..b72cc0d26d
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash.c.patch
@@ -0,0 +1,109 @@
+*** /tmp/,RCSt1a21714	Wed Apr  3 11:49:15 1996
+--- hash.c	Wed Apr  3 08:43:04 1996
+***************
+*** 399,405
+  	/* Create pages for these buckets */
+  	/*
+  	for (i = 0; i <= hashp->hdr.max_bucket; i++) {
+! 		if (__new_page(hashp, i, A_BUCKET) != 0)
+  			return (-1);
+  	}
+  	*/
+
+--- 399,405 -----
+  	/* Create pages for these buckets */
+  	/*
+  	for (i = 0; i <= hashp->hdr.max_bucket; i++) {
+! 		if (__new_page(hashp, (u_int32_t)i, A_BUCKET) != 0)
+  			return (-1);
+  	}
+  	*/
+***************
+*** 560,567
+  	 * XXX
+  	 * Check success/failure conditions.
+  	 */
+! 	mpool_sync(hashp->mp);
+! 	return (0);
+  }
+  
+  /*
+
+--- 560,566 -----
+  	 * XXX
+  	 * Check success/failure conditions.
+  	 */
+! 	return (flush_meta(hashp) || mpool_sync(hashp->mp));
+  }
+  
+  /*
+***************
+*** 585,591
+  	hput_header(hashp);
+  
+  	for (i = 0; i < NCACHED; i++)
+! 		if (hashp->mapp[i])
+  			if (__put_page(hashp,
+  			    (PAGE16 *)hashp->mapp[i], A_BITMAP, 1))
+  				return (-1);
+
+--- 584,590 -----
+  	hput_header(hashp);
+  
+  	for (i = 0; i < NCACHED; i++)
+! 		if (hashp->mapp[i]) {
+  			if (__put_page(hashp,
+  			    (PAGE16 *)hashp->mapp[i], A_BITMAP, 1))
+  				return (-1);
+***************
+*** 589,594
+  			if (__put_page(hashp,
+  			    (PAGE16 *)hashp->mapp[i], A_BITMAP, 1))
+  				return (-1);
+  	return (0);
+  }
+  
+
+--- 588,595 -----
+  			if (__put_page(hashp,
+  			    (PAGE16 *)hashp->mapp[i], A_BITMAP, 1))
+  				return (-1);
++ 			hashp->mapp[i] = NULL;
++ 		}
+  	return (0);
+  }
+  
+***************
+*** 726,732
+  #ifdef HASH_STATISTICS
+  	hash_collisions++;
+  #endif
+- 
+  	__get_item_done(hashp, &cursor);
+  
+  	/*
+
+--- 727,732 -----
+  #ifdef HASH_STATISTICS
+  	hash_collisions++;
+  #endif
+  	__get_item_done(hashp, &cursor);
+  
+  	/*
+***************
+*** 773,778
+  		if (__delpair(hashp, &cursor, &item_info) ||
+  		    __addel(hashp, &item_info, key, val, UNKNOWN, 0))
+  			return (ERROR);
+  		if (item_info.caused_expand)
+  			__expand_table(hashp);
+  		break;
+
+--- 773,779 -----
+  		if (__delpair(hashp, &cursor, &item_info) ||
+  		    __addel(hashp, &item_info, key, val, UNKNOWN, 0))
+  			return (ERROR);
++ 		__get_item_done(hashp, &cursor);
+  		if (item_info.caused_expand)
+  			__expand_table(hashp);
+  		break;
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash.h b/src/plugins/kdb/db2/libdb2/hash/hash.h
new file mode 100644
index 0000000000..b202fc9f22
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash.h
@@ -0,0 +1,196 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)hash.h	8.4 (Berkeley) 11/2/95
+ */
+
+#include "mpool.h"
+#include "db-queue.h"
+
+/* Operations */
+typedef enum {
+	HASH_GET, HASH_PUT, HASH_PUTNEW, HASH_DELETE, HASH_FIRST, HASH_NEXT
+} ACTION;
+
+/* cursor structure */
+typedef struct cursor_t {
+	TAILQ_ENTRY(cursor_t) queue;
+	int (*get)	__P((const DB *, struct cursor_t *, DBT *, DBT *, \
+			     u_int32_t));
+	int (*delete) __P((const DB *, struct cursor_t *, u_int32_t));
+	db_pgno_t	bucket;
+	db_pgno_t	pgno;
+	indx_t	ndx;
+	indx_t	pgndx;
+	u_int16_t *pagep;
+	void *internal;
+} CURSOR;
+
+
+#define IS_BUCKET(X)	((X) & BUF_BUCKET)
+#define IS_VALID(X)     (!((X) & BUF_INVALID))
+
+/* Hash Table Information */
+typedef struct hashhdr {	/* Disk resident portion */
+	int32_t	magic;		/* Magic NO for hash tables */
+	int32_t	version;	/* Version ID */
+	int32_t	lorder;		/* Byte Order */
+	int32_t	bsize;		/* Bucket/Page Size */
+	int32_t	bshift;		/* Bucket shift */
+	int32_t	ovfl_point;	/* Where overflow pages are being allocated */
+	int32_t	last_freed;	/* Last overflow page freed */
+	int32_t	max_bucket;	/* ID of Maximum bucket in use */
+	int32_t	high_mask;	/* Mask to modulo into entire table */
+	int32_t	low_mask;	/* Mask to modulo into lower half of table */
+	int32_t	ffactor;	/* Fill factor */
+	int32_t	nkeys;		/* Number of keys in hash table */
+	int32_t	hdrpages;	/* Size of table header */
+	int32_t	h_charkey;	/* value of hash(CHARKEY) */
+#define NCACHED	32		/* number of bit maps and spare points */
+	int32_t	spares[NCACHED];/* spare pages for overflow */
+	u_int16_t	bitmaps[NCACHED];	/* address of overflow page bitmaps */
+} HASHHDR;
+
+typedef struct htab {		/* Memory resident data structure */
+	TAILQ_HEAD(_cursor_queue, cursor_t) curs_queue;
+	HASHHDR hdr;		/* Header */
+	u_int32_t (*hash) __P((const void *, size_t)); /* Hash Function */
+	int32_t	flags;		/* Flag values */
+	int32_t	fp;		/* File pointer */
+	const char *fname;        	/* File path */
+	u_int8_t *bigdata_buf;	/* Temporary Buffer for BIG data */
+	u_int8_t *bigkey_buf;	/* Temporary Buffer for BIG keys */
+	u_int16_t  *split_buf;	/* Temporary buffer for splits */
+	CURSOR	*seq_cursor;	/* Cursor used for hash_seq */
+	int32_t	local_errno;	/* Error Number -- for DBM compatability */
+	int32_t	new_file;	/* Indicates if fd is backing store or no */
+	int32_t	save_file;	/* Indicates whether we need to flush file at
+				 * exit */
+	u_int32_t *mapp[NCACHED];/* Pointers to page maps */
+	int32_t	nmaps;		/* Initial number of bitmaps */
+	MPOOL	*mp;		/* mpool for buffer management */
+} HTAB;
+
+/*
+ * Constants
+ */
+#define	MAX_BSIZE		65536		/* 2^16 */
+#define MIN_BUFFERS		6
+#define MINHDRSIZE		512
+#define DEF_CACHESIZE	65536
+#define DEF_BUCKET_SHIFT	12		/* log2(BUCKET) */
+#define DEF_BUCKET_SIZE		(1<<DEF_BUCKET_SHIFT)
+#define DEF_SEGSIZE_SHIFT	8		/* log2(SEGSIZE)	 */
+#define DEF_SEGSIZE		(1<<DEF_SEGSIZE_SHIFT)
+#define DEF_DIRSIZE		256
+#define DEF_FFACTOR		65536
+#define MIN_FFACTOR		4
+#define SPLTMAX			8
+#define CHARKEY			"%$sniglet^&"
+#define NUMKEY			1038583
+#define BYTE_SHIFT		3
+#define INT32_T_TO_BYTE		2
+#define INT32_T_BYTE_SHIFT		5
+#define ALL_SET			((u_int32_t)0xFFFFFFFF)
+#define ALL_CLEAR		0
+
+#define PTROF(X)	((BUFHEAD *)((ptr_t)(X)&~0x3))
+#define ISMOD(X)	((ptr_t)(X)&0x1)
+#define DOMOD(X)	((X) = (int8_t *)((ptr_t)(X)|0x1))
+#define ISDISK(X)	((ptr_t)(X)&0x2)
+#define DODISK(X)	((X) = (int8_t *)((ptr_t)(X)|0x2))
+
+#define BITS_PER_MAP	32
+
+/* Given the address of the beginning of a big map, clear/set the nth bit */
+#define CLRBIT(A, N)	((A)[(N)/BITS_PER_MAP] &= ~(1<<((N)%BITS_PER_MAP)))
+#define SETBIT(A, N)	((A)[(N)/BITS_PER_MAP] |= (1<<((N)%BITS_PER_MAP)))
+#define ISSET(A, N)	((A)[(N)/BITS_PER_MAP] & (1<<((N)%BITS_PER_MAP)))
+
+/* Overflow management */
+/*
+ * Overflow page numbers are allocated per split point.  At each doubling of
+ * the table, we can allocate extra pages.  So, an overflow page number has
+ * the top 5 bits indicate which split point and the lower 11 bits indicate
+ * which page at that split point is indicated (pages within split points are
+ * numberered starting with 1).
+ */
+
+#define SPLITSHIFT	11
+#define SPLITMASK	0x7FF
+#define SPLITNUM(N)	(((u_int32_t)(N)) >> SPLITSHIFT)
+#define OPAGENUM(N)	((N) & SPLITMASK)
+#define	OADDR_OF(S,O)	((u_int32_t)((u_int32_t)(S) << SPLITSHIFT) + (O))
+
+#define BUCKET_TO_PAGE(B) \
+	((B) + hashp->hdr.hdrpages + ((B) \
+	    ? hashp->hdr.spares[__log2((B)+1)-1] : 0))
+#define OADDR_TO_PAGE(B) 	\
+	(BUCKET_TO_PAGE ( (1 << SPLITNUM((B))) -1 ) + OPAGENUM((B)))
+
+#define POW2(N)  (1 << (N))
+
+#define MAX_PAGES(H) (DB_OFF_T_MAX / (H)->hdr.bsize)
+
+/* Shorthands for accessing structure */
+#define METADATA_PGNO 0
+#define SPLIT_PGNO 0xFFFF
+
+typedef struct item_info {
+	db_pgno_t 		pgno;
+	db_pgno_t		bucket;
+	indx_t		ndx;
+	indx_t		pgndx;
+	u_int8_t	status;
+	int32_t		seek_size;
+	db_pgno_t		seek_found_page;
+	indx_t		key_off;
+	indx_t		data_off;
+	u_int8_t	caused_expand;
+} ITEM_INFO;
+
+
+#define	ITEM_ERROR	0
+#define	ITEM_OK		1
+#define	ITEM_NO_MORE	2
+
+#define	ITEM_GET_FIRST	0
+#define	ITEM_GET_NEXT	1
+#define	ITEM_GET_RESET	2
+#define	ITEM_GET_DONE	3
+#define	ITEM_GET_N	4
+
+#define	UNKNOWN		0xffffffff		/* for num_items */
+#define	NO_EXPAND	0xfffffffe 
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash_bigkey.c b/src/plugins/kdb/db2/libdb2/hash/hash_bigkey.c
new file mode 100644
index 0000000000..06210a57cc
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash_bigkey.c
@@ -0,0 +1,483 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash_bigkey.c	8.5 (Berkeley) 11/2/95";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * PACKAGE: hash
+ * DESCRIPTION:
+ *	Big key/data handling for the hashing package.
+ *
+ * ROUTINES:
+ * External
+ *	__big_keydata
+ *	__big_split
+ *	__big_insert
+ *	__big_return
+ *	__big_delete
+ *	__find_last_page
+ * Internal
+ *	collect_key
+ *	collect_data
+ */
+#include <sys/types.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef DEBUG
+#include <assert.h>
+#endif
+
+#include "db-int.h"
+#include "hash.h"
+#include "page.h"
+#include "extern.h"
+
+static int32_t collect_key __P((HTAB *, PAGE16 *, int32_t, db_pgno_t *));
+static int32_t collect_data __P((HTAB *, PAGE16 *, int32_t));
+
+/*
+ * Big_insert
+ *
+ * You need to do an insert and the key/data pair is greater than 
+ * MINFILL * the bucket size
+ *
+ * Returns:
+ *	 0 ==> OK
+ *	-1 ==> ERROR
+ */
+int32_t
+__big_insert(hashp, pagep, key, val)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	const DBT *key, *val;
+{
+	size_t  key_size, val_size;
+	indx_t  key_move_bytes, val_move_bytes;
+	int8_t *key_data, *val_data, base_page;
+
+	key_data = (int8_t *)key->data;
+	key_size = key->size;
+	val_data = (int8_t *)val->data;
+	val_size = val->size;
+
+	NUM_ENT(pagep) = NUM_ENT(pagep) + 1;
+
+	for (base_page = 1; key_size + val_size;) {
+		/* Add a page! */
+		pagep =
+		    __add_bigpage(hashp, pagep, NUM_ENT(pagep) - 1, base_page);
+		if (!pagep)
+			return (-1);
+
+		/* There's just going to be one entry on this page. */
+		NUM_ENT(pagep) = 1;
+
+		/* Move the key's data. */
+		key_move_bytes = MIN(FREESPACE(pagep), key_size);
+		/* Mark the page as to how much key & data is on this page. */
+		BIGKEYLEN(pagep) = key_move_bytes;
+		val_move_bytes =
+		    MIN(FREESPACE(pagep) - key_move_bytes, val_size);
+		BIGDATALEN(pagep) = val_move_bytes;
+
+		/* Note big pages build beginning --> end, not vice versa. */
+		if (key_move_bytes)
+			memmove(BIGKEY(pagep), key_data, key_move_bytes);
+		if (val_move_bytes)
+			memmove(BIGDATA(pagep), val_data, val_move_bytes);
+
+		key_size -= key_move_bytes;
+		key_data += key_move_bytes;
+		val_size -= val_move_bytes;
+		val_data += val_move_bytes;
+
+		base_page = 0;
+	}
+	__put_page(hashp, pagep, A_RAW, 1);
+	return (0);
+}
+
+/*
+ * Called when we need to delete a big pair.
+ *
+ * Returns:
+ *	 0 => OK
+ *	-1 => ERROR
+ */
+int32_t
+#ifdef __STDC__
+__big_delete(HTAB *hashp, PAGE16 *pagep, indx_t ndx)
+#else
+__big_delete(hashp, pagep, ndx)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	u_int32_t ndx;		/* Index of big pair on base page. */
+#endif
+{
+	PAGE16 *last_pagep;
+
+	/* Get first page with big key/data. */
+	pagep = __get_page(hashp, OADDR_TO_PAGE(DATA_OFF(pagep, ndx)), A_RAW);
+	if (!pagep)
+		return (-1);
+
+	/*
+	 * Traverse through the pages, freeing the previous one (except
+	 * the first) at each new page.
+	 */
+	while (NEXT_PGNO(pagep) != INVALID_PGNO) {
+		last_pagep = pagep;
+		pagep = __get_page(hashp, NEXT_PGNO(pagep), A_RAW);
+		if (!pagep)
+			return (-1);
+		__delete_page(hashp, last_pagep, A_OVFL);
+	}
+
+	/* Free the last page in the chain. */
+	__delete_page(hashp, pagep, A_OVFL);
+	return (0);
+}
+
+/*
+ * Given a key, indicates whether the big key at cursorp matches the
+ * given key.
+ *
+ * Returns:
+ *	 1 = Found!
+ *	 0 = Key not found
+ *	-1 error
+ */
+int32_t
+__find_bigpair(hashp, cursorp, key, size)
+	HTAB *hashp;
+	CURSOR *cursorp;
+	int8_t *key;
+	int32_t size;
+{
+	PAGE16 *pagep, *hold_pagep;
+	db_pgno_t  next_pgno;
+	int32_t ksize;
+	u_int16_t bytes;
+	int8_t *kkey;
+
+	ksize = size;
+	kkey = key;
+	bytes = 0;
+
+	hold_pagep = NULL;
+	/* Chances are, hashp->cpage is the base page. */
+	if (cursorp->pagep)
+		pagep = hold_pagep = cursorp->pagep;
+	else {
+		pagep = __get_page(hashp, cursorp->pgno, A_RAW);
+		if (!pagep)
+			return (-1);
+	}
+
+	/*
+	 * Now, get the first page with the big stuff on it.
+	 *
+	 * XXX
+	 * KLUDGE: we know that cursor is looking at the _next_ item, so
+	 * we have to look at pgndx - 1.
+	 */
+	next_pgno = OADDR_TO_PAGE(DATA_OFF(pagep, (cursorp->pgndx - 1)));
+	if (!hold_pagep)
+		__put_page(hashp, pagep, A_RAW, 0);
+	pagep = __get_page(hashp, next_pgno, A_RAW);
+	if (!pagep)
+		return (-1);
+
+	/* While there are both keys to compare. */
+	while ((ksize > 0) && (BIGKEYLEN(pagep))) {
+		if (ksize < KEY_OFF(pagep, 0) ||
+		    memcmp(BIGKEY(pagep), kkey, BIGKEYLEN(pagep))) {
+			__put_page(hashp, pagep, A_RAW, 0);
+			return (0);
+		}
+		kkey += BIGKEYLEN(pagep);
+		ksize -= BIGKEYLEN(pagep);
+		if (NEXT_PGNO(pagep) != INVALID_PGNO) {
+			next_pgno = NEXT_PGNO(pagep);
+			__put_page(hashp, pagep, A_RAW, 0);
+			pagep = __get_page(hashp, next_pgno, A_RAW);
+			if (!pagep)
+				return (-1);
+		}
+	}
+	__put_page(hashp, pagep, A_RAW, 0);
+#ifdef DEBUG
+	assert(ksize >= 0);
+#endif
+	if (ksize != 0) {
+#ifdef HASH_STATISTICS
+		++hash_collisions;
+#endif
+		return (0);
+	} else
+		return (1);
+}
+
+/*
+ * Fill in the key and data for this big pair.
+ */
+int32_t
+__big_keydata(hashp, pagep, key, val, ndx)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	DBT *key, *val;
+	int32_t ndx;
+{
+	ITEM_INFO ii;
+	PAGE16 *key_pagep;
+	db_pgno_t last_page;
+
+	key_pagep =
+	    __get_page(hashp, OADDR_TO_PAGE(DATA_OFF(pagep, ndx)), A_RAW);
+	if (!key_pagep)
+		return (-1);
+	key->size = collect_key(hashp, key_pagep, 0, &last_page);
+	key->data = hashp->bigkey_buf;
+	__put_page(hashp, key_pagep, A_RAW, 0);
+
+	if (key->size == -1)
+		return (-1);
+
+	/* Create an item_info to direct __big_return to the beginning pgno. */
+	ii.pgno = last_page;
+	return (__big_return(hashp, &ii, val, 1));
+}
+
+/*
+ * Return the big key on page, ndx.
+ */
+int32_t
+#ifdef __STDC__
+__get_bigkey(HTAB *hashp, PAGE16 *pagep, indx_t ndx, DBT *key)
+#else
+__get_bigkey(hashp, pagep, ndx, key)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	u_int32_t ndx;
+	DBT *key;
+#endif
+{
+	PAGE16 *key_pagep;
+
+	key_pagep =
+	    __get_page(hashp, OADDR_TO_PAGE(DATA_OFF(pagep, ndx)), A_RAW);
+	if (!pagep)
+		return (-1);
+	key->size = collect_key(hashp, key_pagep, 0, NULL);
+	key->data = hashp->bigkey_buf;
+
+	__put_page(hashp, key_pagep, A_RAW, 0);
+
+	return (0);
+}
+
+/*
+ * Return the big key and data indicated in item_info.
+ */
+int32_t
+__big_return(hashp, item_info, val, on_bigkey_page)
+	HTAB *hashp;
+	ITEM_INFO *item_info;
+	DBT *val;
+	int32_t on_bigkey_page;
+{
+	PAGE16 *pagep;
+	db_pgno_t next_pgno;
+
+	if (!on_bigkey_page) {
+		/* Get first page with big pair on it. */
+		pagep = __get_page(hashp,
+		    OADDR_TO_PAGE(item_info->data_off), A_RAW);
+		if (!pagep)
+			return (-1);
+	} else {
+		pagep = __get_page(hashp, item_info->pgno, A_RAW);
+		if (!pagep)
+			return (-1);
+	}
+
+	/* Traverse through the bigkey pages until a page with data is found. */
+	while (!BIGDATALEN(pagep)) {
+		next_pgno = NEXT_PGNO(pagep);
+		__put_page(hashp, pagep, A_RAW, 0);
+		pagep = __get_page(hashp, next_pgno, A_RAW);
+		if (!pagep)
+			return (-1);
+	}
+
+	val->size = collect_data(hashp, pagep, 0);
+	if (val->size < 1)
+		return (-1);
+	val->data = (void *)hashp->bigdata_buf;
+
+	__put_page(hashp, pagep, A_RAW, 0);
+	return (0);
+}
+
+/*
+ * Given a page with a big key on it, traverse through the pages counting data
+ * length, and collect all of the data on the way up.  Store the key in
+ * hashp->bigkey_buf.  last_page indicates to the calling function what the
+ * last page with key on it is; this will help if you later want to retrieve
+ * the data portion.
+ *
+ * Does the work for __get_bigkey.
+ *
+ * Return total length of data; -1 if error.
+ */
+static int32_t
+collect_key(hashp, pagep, len, last_page)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	int32_t len;
+	db_pgno_t *last_page;
+{
+	PAGE16 *next_pagep;
+	int32_t totlen, retval;
+	db_pgno_t next_pgno;
+#ifdef DEBUG
+	db_pgno_t save_addr;
+#endif
+
+	/* If this is the last page with key. */
+	if (BIGDATALEN(pagep)) {
+		totlen = len + BIGKEYLEN(pagep);
+		if (hashp->bigkey_buf)
+			free(hashp->bigkey_buf);
+		hashp->bigkey_buf = (u_int8_t *)malloc(totlen);
+		if (!hashp->bigkey_buf)
+			return (-1);
+		memcpy(hashp->bigkey_buf + len,
+		    BIGKEY(pagep), BIGKEYLEN(pagep));
+		if (last_page)
+			*last_page = ADDR(pagep);
+		return (totlen);
+	}
+
+	/* Key filled up all of last key page, so we've gone 1 too far. */
+	if (BIGKEYLEN(pagep) == 0) {
+		if (hashp->bigkey_buf)
+			free(hashp->bigkey_buf);
+		hashp->bigkey_buf = (u_int8_t *)malloc(len);
+		return (hashp->bigkey_buf ? len : -1);
+	}
+	totlen = len + BIGKEYLEN(pagep);
+
+	/* Set pagep to the next page in the chain. */
+	if (last_page)
+		*last_page = ADDR(pagep);
+	next_pgno = NEXT_PGNO(pagep);
+	next_pagep = __get_page(hashp, next_pgno, A_RAW);
+	if (!next_pagep)
+		return (-1);
+#ifdef DEBUG
+	save_addr = ADDR(pagep);
+#endif
+	retval = collect_key(hashp, next_pagep, totlen, last_page);
+
+#ifdef DEBUG
+	assert(save_addr == ADDR(pagep));
+#endif
+	memcpy(hashp->bigkey_buf + len, BIGKEY(pagep), BIGKEYLEN(pagep));
+	__put_page(hashp, next_pagep, A_RAW, 0);
+
+	return (retval);
+}
+
+/*
+ * Given a page with big data on it, recur through the pages counting data
+ * length, and collect all of the data on the way up.  Store the data in
+ * hashp->bigdata_buf.
+ *
+ * Does the work for __big_return.
+ *
+ * Return total length of data; -1 if error.
+ */
+static int32_t
+collect_data(hashp, pagep, len)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	int32_t len;
+{
+	PAGE16 *next_pagep;
+	int32_t totlen, retval;
+	db_pgno_t next_pgno;
+#ifdef DEBUG
+	db_pgno_t save_addr;
+#endif
+
+	/* If there is no next page. */
+	if (NEXT_PGNO(pagep) == INVALID_PGNO) {
+		if (hashp->bigdata_buf)
+			free(hashp->bigdata_buf);
+		totlen = len + BIGDATALEN(pagep);
+		hashp->bigdata_buf = (u_int8_t *)malloc(totlen);
+		if (!hashp->bigdata_buf)
+			return (-1);
+		memcpy(hashp->bigdata_buf + totlen - BIGDATALEN(pagep),
+		    BIGDATA(pagep), BIGDATALEN(pagep));
+		return (totlen);
+	}
+	totlen = len + BIGDATALEN(pagep);
+
+	/* Set pagep to the next page in the chain. */
+	next_pgno = NEXT_PGNO(pagep);
+	next_pagep = __get_page(hashp, next_pgno, A_RAW);
+	if (!next_pagep)
+		return (-1);
+
+#ifdef DEBUG
+	save_addr = ADDR(pagep);
+#endif
+	retval = collect_data(hashp, next_pagep, totlen);
+#ifdef DEBUG
+	assert(save_addr == ADDR(pagep));
+#endif
+	memcpy(hashp->bigdata_buf + totlen - BIGDATALEN(pagep),
+	    BIGDATA(pagep), BIGDATALEN(pagep));
+	__put_page(hashp, next_pagep, A_RAW, 0);
+
+	return (retval);
+}
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash_debug.c b/src/plugins/kdb/db2/libdb2/hash/hash_debug.c
new file mode 100644
index 0000000000..69229fc8df
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash_debug.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1995
+ *	The President and Fellows of Harvard University
+ *
+ * This code is derived from software contributed to Harvard by
+ * Jeremy Rassen.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash_debug.c	8.4 (Berkeley) 11/7/95";
+#endif /* LIBC_SCCS and not lint */
+
+#ifdef DEBUG
+/*
+ * PACKAGE:  hashing
+ *
+ * DESCRIPTION:
+ *	Debug routines.
+ *
+ * ROUTINES:
+ *
+ * External
+ *	__dump_bucket
+ */
+#include <stdio.h>
+
+#include "db-int.h"
+#include "hash.h"
+#include "page.h"
+#include "extern.h"
+
+void
+__dump_bucket(hashp, bucket)
+	HTAB *hashp;
+	u_int32_t bucket;
+{
+	CURSOR cursor;
+	DBT key, val;
+	ITEM_INFO item_info;
+	int var;
+	char *cp;
+
+	cursor.pagep = NULL;
+	item_info.seek_size = 0;
+	item_info.seek_found_page = 0;
+
+	__get_item_reset(hashp, &cursor);
+
+	cursor.bucket = bucket;
+	for (;;) {
+		__get_item_next(hashp, &cursor, &key, &val, &item_info);
+		if (item_info.status == ITEM_ERROR) {
+			(void)printf("get_item_next returned error\n");
+			break;
+		} else if (item_info.status == ITEM_NO_MORE)
+			break;
+
+		if (item_info.key_off == BIGPAIR) {
+			if (__big_keydata(hashp, cursor.pagep, &key, &val,
+			    item_info.pgndx)) {
+				(void)printf("__big_keydata returned error\n");
+				break;
+			}
+		}
+
+		if (key.size == sizeof(int)) {
+			memcpy(&var, key.data, sizeof(int));
+			(void)printf("%d\n", var);
+		} else {
+			for (cp = (char *)key.data; key.size--; cp++)
+				(void)printf("%c", *cp);
+			(void)printf("\n");
+		}
+	}
+	__get_item_done(hashp, &cursor);
+}
+#endif /* DEBUG */
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash_func.c b/src/plugins/kdb/db2/libdb2/hash/hash_func.c
new file mode 100644
index 0000000000..1dee694608
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash_func.c
@@ -0,0 +1,201 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash_func.c	8.4 (Berkeley) 11/7/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include "db-int.h"
+#include "hash.h"
+#include "page.h"
+#include "extern.h"
+
+#if 0
+static u_int32_t hash1 __P((const void *, size_t));
+static u_int32_t hash2 __P((const void *, size_t));
+static u_int32_t hash3 __P((const void *, size_t));
+#endif
+static u_int32_t hash4 __P((const void *, size_t));
+
+/* Default hash function. */
+u_int32_t (*__default_hash) __P((const void *, size_t)) = hash4;
+
+/*
+ * Assume that we've already split the bucket to which this key hashes,
+ * calculate that bucket, and check that in fact we did already split it.
+ *
+ * EJB's original hsearch hash.
+ */
+#define PRIME1		37
+#define PRIME2		1048583
+
+#if 0
+static u_int32_t
+hash1(key, len)
+	const void *key;
+	size_t len;
+{
+	u_int32_t h;
+	u_int8_t *k;
+
+	h = 0;
+	k = (u_int8_t *)key;
+	/* Convert string to integer */
+	while (len--)
+		h = h * PRIME1 ^ (*k++ - ' ');
+	h %= PRIME2;
+	return (h);
+}
+
+/*
+ * Phong Vo's linear congruential hash
+ */
+#define dcharhash(h, c)	((h) = 0x63c63cd9*(h) + 0x9c39c33d + (c))
+
+static u_int32_t
+hash2(key, len)
+	const void *key;
+	size_t len;
+{
+	u_int32_t h;
+	u_int8_t *e, c, *k;
+
+	k = (u_int8_t *)key;
+	e = k + len;
+	for (h = 0; k != e;) {
+		c = *k++;
+		if (!c && k > e)
+			break;
+		dcharhash(h, c);
+	}
+	return (h);
+}
+
+/*
+ * This is INCREDIBLY ugly, but fast.  We break the string up into 8 byte
+ * units.  On the first time through the loop we get the "leftover bytes"
+ * (strlen % 8).  On every other iteration, we perform 8 HASHC's so we handle
+ * all 8 bytes.  Essentially, this saves us 7 cmp & branch instructions.  If
+ * this routine is heavily used enough, it's worth the ugly coding.
+ *
+ * Ozan Yigit's original sdbm hash.
+ */
+static u_int32_t
+hash3(key, len)
+	const void *key;
+	size_t len;
+{
+	u_int32_t n, loop;
+	u_int8_t *k;
+
+#define HASHC   n = *k++ + 65599 * n
+
+	n = 0;
+	k = (u_int8_t *)key;
+	if (len > 0) {
+		loop = (len + 8 - 1) >> 3;
+
+		switch (len & (8 - 1)) {
+		case 0:
+			do {	/* All fall throughs */
+				HASHC;
+		case 7:
+				HASHC;
+		case 6:
+				HASHC;
+		case 5:
+				HASHC;
+		case 4:
+				HASHC;
+		case 3:
+				HASHC;
+		case 2:
+				HASHC;
+		case 1:
+				HASHC;
+			} while (--loop);
+		}
+
+	}
+	return (n);
+}
+#endif
+
+
+/* Chris Torek's hash function. */
+static u_int32_t
+hash4(key, len)
+	const void *key;
+	size_t len;
+{
+	u_int32_t h, loop;
+	const u_int8_t *k;
+
+#define HASH4a   h = (h << 5) - h + *k++;
+#define HASH4b   h = (h << 5) + h + *k++;
+#define HASH4 HASH4b
+
+	h = 0;
+	k = (const u_int8_t *)key;
+	if (len > 0) {
+		loop = (len + 8 - 1) >> 3;
+
+		switch (len & (8 - 1)) {
+		case 0:
+			do {	/* All fall throughs */
+				HASH4;
+		case 7:
+				HASH4;
+		case 6:
+				HASH4;
+		case 5:
+				HASH4;
+		case 4:
+				HASH4;
+		case 3:
+				HASH4;
+		case 2:
+				HASH4;
+		case 1:
+				HASH4;
+			} while (--loop);
+		}
+
+	}
+	return (h);
+}
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash_log2.c b/src/plugins/kdb/db2/libdb2/hash/hash_log2.c
new file mode 100644
index 0000000000..8c710e5d21
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash_log2.c
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash_log2.c	8.4 (Berkeley) 11/7/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include "db-int.h"
+#include "hash.h"
+#include "page.h"
+#include "extern.h"
+
+u_int32_t
+__kdb2_log2(num)
+	u_int32_t num;
+{
+	u_int32_t i, limit;
+
+	limit = 1;
+	for (i = 0; limit < num; limit = limit << 1, i++);
+	return (i);
+}
diff --git a/src/plugins/kdb/db2/libdb2/hash/hash_page.c b/src/plugins/kdb/db2/libdb2/hash/hash_page.c
new file mode 100644
index 0000000000..e25115d3f0
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hash_page.c
@@ -0,0 +1,1387 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hash_page.c	8.11 (Berkeley) 11/7/95";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * PACKAGE:  hashing
+ *
+ * DESCRIPTION:
+ *      Page manipulation for hashing package.
+ *
+ * ROUTINES:
+ *
+ * External
+ *      __get_page
+ *      __add_ovflpage
+ * Internal
+ *      overflow_page
+ *      open_temp
+ */
+
+#include <sys/types.h>
+
+#ifdef DEBUG
+#include <assert.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "hash.h"
+#include "page.h"
+#include "extern.h"
+
+static int32_t	 add_bigptr __P((HTAB *, ITEM_INFO *, indx_t));
+static u_int32_t *fetch_bitmap __P((HTAB *, int32_t));
+static u_int32_t first_free __P((u_int32_t));
+static indx_t	 next_realkey __P((PAGE16 *, indx_t));
+static u_int16_t overflow_page __P((HTAB *));
+static void	 page_init __P((HTAB *, PAGE16 *, db_pgno_t, u_int8_t));
+static indx_t	 prev_realkey __P((PAGE16 *, indx_t));
+static void	 putpair __P((PAGE8 *, const DBT *, const DBT *));
+static void	 swap_page_header_in __P((PAGE16 *));
+static void	 swap_page_header_out __P((PAGE16 *));
+
+#ifdef DEBUG_SLOW
+static void	 account_page(HTAB *, db_pgno_t, int);
+#endif
+
+u_int32_t
+__get_item(hashp, cursorp, key, val, item_info)
+	HTAB *hashp;
+	CURSOR *cursorp;
+	DBT *key, *val;
+	ITEM_INFO *item_info;
+{
+	db_pgno_t next_pgno;
+	int32_t i;
+
+	/* Check if we need to get a page. */
+	if (!cursorp->pagep) {
+		if (cursorp->pgno == INVALID_PGNO) {
+			cursorp->pagep =
+			    __get_page(hashp, cursorp->bucket, A_BUCKET);
+			cursorp->pgno = ADDR(cursorp->pagep);
+			cursorp->ndx = 0;
+			cursorp->pgndx = 0;
+		} else 
+			cursorp->pagep =
+			    __get_page(hashp, cursorp->pgno, A_RAW);
+		if (!cursorp->pagep) {
+			item_info->status = ITEM_ERROR;
+			return (-1);
+		}
+	}
+	if (item_info->seek_size &&
+	    FREESPACE(cursorp->pagep) > item_info->seek_size)
+		item_info->seek_found_page = cursorp->pgno;
+
+	if (cursorp->pgndx == NUM_ENT(cursorp->pagep)) {
+		/* Fetch next page. */
+		if (NEXT_PGNO(cursorp->pagep) == INVALID_PGNO) {
+			item_info->status = ITEM_NO_MORE;
+			return (-1);
+		}
+		next_pgno = NEXT_PGNO(cursorp->pagep);
+		cursorp->pgndx = 0;
+		__put_page(hashp, cursorp->pagep, A_RAW, 0);
+		cursorp->pagep = __get_page(hashp, next_pgno, A_RAW);
+		if (!cursorp->pagep) {
+			item_info->status = ITEM_ERROR;
+			return (-1);
+		}
+		cursorp->pgno = next_pgno;
+	}
+	if (KEY_OFF(cursorp->pagep, cursorp->pgndx) != BIGPAIR) {
+		if ((i = prev_realkey(cursorp->pagep, cursorp->pgndx)) ==
+		    cursorp->pgndx)
+			key->size = hashp->hdr.bsize -
+			    KEY_OFF(cursorp->pagep, cursorp->pgndx);
+		else
+			key->size = DATA_OFF(cursorp->pagep, i) -
+			    KEY_OFF(cursorp->pagep, cursorp->pgndx);
+	}
+
+	/* 
+	 * All of this information will be set incorrectly for big keys, but
+	 * it will be ignored anyway.
+	 */
+	val->size = KEY_OFF(cursorp->pagep, cursorp->pgndx) -
+	    DATA_OFF(cursorp->pagep, cursorp->pgndx);
+	key->data = KEY(cursorp->pagep, cursorp->pgndx);
+	val->data = DATA(cursorp->pagep, cursorp->pgndx);
+	item_info->pgno = cursorp->pgno;
+	item_info->bucket = cursorp->bucket;
+	item_info->ndx = cursorp->ndx;
+	item_info->pgndx = cursorp->pgndx;
+	item_info->key_off = KEY_OFF(cursorp->pagep, cursorp->pgndx);
+	item_info->data_off = DATA_OFF(cursorp->pagep, cursorp->pgndx);
+	item_info->status = ITEM_OK;
+
+	return (0);
+}
+
+u_int32_t
+__get_item_reset(hashp, cursorp)
+	HTAB *hashp;
+	CURSOR *cursorp;
+{
+	if (cursorp->pagep)
+		__put_page(hashp, cursorp->pagep, A_RAW, 0);
+	cursorp->pagep = NULL;
+	cursorp->bucket = -1;
+	cursorp->ndx = 0;
+	cursorp->pgndx = 0;
+	cursorp->pgno = INVALID_PGNO;
+	return (0);
+}
+
+u_int32_t
+__get_item_done(hashp, cursorp)
+	HTAB *hashp;
+	CURSOR *cursorp;
+{
+	if (cursorp->pagep)
+		__put_page(hashp, cursorp->pagep, A_RAW, 0);
+	cursorp->pagep = NULL;
+
+	/* 
+	 * We don't throw out the page number since we might want to
+	 * continue getting on this page.
+	 */
+	return (0);
+}
+
+u_int32_t
+__get_item_first(hashp, cursorp, key, val, item_info)
+	HTAB *hashp;
+	CURSOR *cursorp;
+	DBT *key, *val;
+	ITEM_INFO *item_info;
+{
+	__get_item_reset(hashp, cursorp);
+	cursorp->bucket = 0;
+	return (__get_item_next(hashp, cursorp, key, val, item_info));
+}
+
+/*
+ * Returns a pointer to key/data pair on a page.  In the case of bigkeys,
+ * just returns the page number and index of the bigkey pointer pair.
+ */
+u_int32_t
+__get_item_next(hashp, cursorp, key, val, item_info)
+	HTAB *hashp;
+	CURSOR *cursorp;
+	DBT *key, *val;
+	ITEM_INFO *item_info;
+{
+	int status;
+
+	status = __get_item(hashp, cursorp, key, val, item_info);
+	cursorp->ndx++;
+	cursorp->pgndx++;
+	return (status);
+}
+
+/*
+ * Put a non-big pair on a page.
+ */
+static void
+putpair(p, key, val)
+	PAGE8 *p;
+	const DBT *key, *val;
+{
+	u_int16_t *pagep, n, off;
+
+	pagep = (PAGE16 *)p;
+
+	/* Items on the page are 0-indexed. */
+	n = NUM_ENT(pagep);
+	off = OFFSET(pagep) - key->size + 1;
+	memmove(p + off, key->data, key->size);
+	KEY_OFF(pagep, n) = off;
+
+	off -= val->size;
+	memmove(p + off, val->data, val->size);
+	DATA_OFF(pagep, n) = off;
+
+	/* Adjust page info. */
+	NUM_ENT(pagep) = n + 1;
+	OFFSET(pagep) = off - 1;
+}
+
+/*
+ * Returns the index of the next non-bigkey pair after n on the page.
+ * Returns -1 if there are no more non-big things on the page.
+ */
+static indx_t
+#ifdef __STDC__
+next_realkey(PAGE16 * pagep, indx_t n)
+#else
+next_realkey(pagep, n)
+	PAGE16 *pagep;
+	u_int32_t n;
+#endif
+{
+	indx_t i;
+
+	for (i = n + 1; i < NUM_ENT(pagep); i++)
+		if (KEY_OFF(pagep, i) != BIGPAIR)
+			return (i);
+	return (-1);
+}
+
+/*
+ * Returns the index of the previous non-bigkey pair after n on the page.
+ * Returns n if there are no previous non-big things on the page.
+ */
+static indx_t
+#ifdef __STDC__
+prev_realkey(PAGE16 * pagep, indx_t n)
+#else
+prev_realkey(pagep, n)
+	PAGE16 *pagep;
+	u_int32_t n;
+#endif
+{
+	int32_t i;
+
+	/* Need a signed value to do the compare properly. */
+	for (i = n - 1; i > -1; i--)
+		if (KEY_OFF(pagep, i) != BIGPAIR)
+			return (i);
+	return (n);
+}
+
+/*
+ * Returns:
+ *       0 OK
+ *      -1 error
+ */
+extern int32_t
+__delpair(hashp, cursorp, item_info)
+	HTAB *hashp;
+	CURSOR *cursorp;
+	ITEM_INFO *item_info;
+{
+	PAGE16 *pagep;
+	indx_t ndx;
+	short check_ndx;
+	int16_t delta, len, next_key;
+	int32_t n;
+	u_int8_t *src, *dest;
+
+	ndx = cursorp->pgndx;
+	if (!cursorp->pagep) {
+		pagep = __get_page(hashp, cursorp->pgno, A_RAW);
+		if (!pagep)
+			return (-1);
+		/*
+		 * KLUGE: pgndx has gone one too far, because cursor points
+		 * to the _next_ item.  Use pgndx - 1.
+		 */
+		--ndx;
+	} else
+		pagep = cursorp->pagep;
+#ifdef DEBUG
+	assert(ADDR(pagep) == cursorp->pgno);
+#endif
+
+	if (KEY_OFF(pagep, ndx) == BIGPAIR) {
+		delta = 0;
+		__big_delete(hashp, pagep, ndx);
+	} else {
+		/*
+		 * Compute "delta", the amount we have to shift all of the
+		 * offsets.  To find the delta, we need to make sure that
+		 * we aren't looking at the DATA_OFF of a big/keydata pair.
+		 */
+		for (check_ndx = (short)(ndx - 1);
+		    check_ndx >= 0 && KEY_OFF(pagep, check_ndx) == BIGPAIR;
+		    check_ndx--);
+		if (check_ndx < 0)
+			delta = hashp->hdr.bsize - DATA_OFF(pagep, ndx);
+		else
+			delta =
+			    DATA_OFF(pagep, check_ndx) - DATA_OFF(pagep, ndx);
+
+		/*
+		 * The hard case: we want to remove something other than
+		 * the last item on the page.  We need to shift data and
+		 * offsets down.
+		 */
+		if (ndx != NUM_ENT(pagep) - 1) {
+			/*
+			 * Move the data: src is the address of the last data
+			 * item on the page.
+			 */
+			src = (u_int8_t *)pagep + OFFSET(pagep) + 1;
+			/* 
+			 * Length is the distance between where to start
+			 * deleting and end of the data on the page.
+			 */
+			len = DATA_OFF(pagep, ndx) - (OFFSET(pagep) + 1);
+			/*
+			 * Dest is the location of the to-be-deleted item
+			 * occupied - length.
+			 */
+			if (check_ndx < 0)
+				dest =
+				    (u_int8_t *)pagep + hashp->hdr.bsize - len;
+			else
+				dest = (u_int8_t *)pagep +
+				    DATA_OFF(pagep, (check_ndx)) - len;
+			memmove(dest, src, len);
+		}
+	}
+
+	/* Adjust the offsets. */
+	for (n = ndx; n < NUM_ENT(pagep) - 1; n++)
+		if (KEY_OFF(pagep, (n + 1)) != BIGPAIR) {
+			next_key = next_realkey(pagep, n);
+#ifdef DEBUG
+			assert(next_key != -1);
+#endif
+			KEY_OFF(pagep, n) = KEY_OFF(pagep, (n + 1)) + delta;
+			DATA_OFF(pagep, n) = DATA_OFF(pagep, (n + 1)) + delta;
+		} else {
+			KEY_OFF(pagep, n) = KEY_OFF(pagep, (n + 1));
+			DATA_OFF(pagep, n) = DATA_OFF(pagep, (n + 1));
+		}
+
+	/* Adjust page metadata. */
+	OFFSET(pagep) = OFFSET(pagep) + delta;
+	NUM_ENT(pagep) = NUM_ENT(pagep) - 1;
+
+	--hashp->hdr.nkeys;
+
+	/* Is this page now an empty overflow page?  If so, free it. */
+	if (TYPE(pagep) == HASH_OVFLPAGE && NUM_ENT(pagep) == 0) {
+		PAGE16 *empty_page;
+		db_pgno_t to_find, next_pgno, link_page;
+
+		/*
+		 * We need to go back to the first page in the chain and 
+		 * look for this page so that we can update the previous
+		 * page's NEXT_PGNO field.
+		 */
+		to_find = ADDR(pagep);
+		empty_page = pagep;
+		link_page = NEXT_PGNO(empty_page);
+		pagep = __get_page(hashp, item_info->bucket, A_BUCKET);
+		if (!pagep)
+			return (-1);
+		while (NEXT_PGNO(pagep) != to_find) {
+			next_pgno = NEXT_PGNO(pagep);
+#ifdef DEBUG
+			assert(next_pgno != INVALID_PGNO);
+#endif
+			__put_page(hashp, pagep, A_RAW, 0);
+			pagep = __get_page(hashp, next_pgno, A_RAW);
+			if (!pagep)
+				return (-1);
+		}
+
+		/*
+		 * At this point, pagep should point to the page before the
+		 * page to be deleted.
+		 */
+		NEXT_PGNO(pagep) = link_page;
+		if (item_info->pgno == to_find) {
+			item_info->pgno = ADDR(pagep);
+			item_info->pgndx = NUM_ENT(pagep);
+			item_info->seek_found_page = ADDR(pagep);
+		}
+		__delete_page(hashp, empty_page, A_OVFL);
+	}
+	__put_page(hashp, pagep, A_RAW, 1);
+
+	return (0);
+}
+
+extern int32_t
+__split_page(hashp, obucket, nbucket)
+	HTAB *hashp;
+	u_int32_t obucket, nbucket;
+{
+	DBT key, val;
+	ITEM_INFO old_ii, new_ii;
+	PAGE16 *old_pagep, *temp_pagep;
+	db_pgno_t next_pgno;
+	int32_t off;
+	u_int16_t n;
+	int8_t base_page;
+
+	off = hashp->hdr.bsize;
+	old_pagep = __get_page(hashp, obucket, A_BUCKET);
+
+	base_page = 1;
+
+	temp_pagep = hashp->split_buf;
+	memcpy(temp_pagep, old_pagep, hashp->hdr.bsize);
+
+	page_init(hashp, old_pagep, ADDR(old_pagep), HASH_PAGE);
+	__put_page(hashp, old_pagep, A_RAW, 1);
+
+	old_ii.pgno = BUCKET_TO_PAGE(obucket);
+	new_ii.pgno = BUCKET_TO_PAGE(nbucket);
+	old_ii.bucket = obucket;
+	new_ii.bucket = nbucket;
+	old_ii.seek_found_page = new_ii.seek_found_page = 0;
+
+	while (temp_pagep != 0) {
+		off = hashp->hdr.bsize;
+		for (n = 0; n < NUM_ENT(temp_pagep); n++) {
+			if (KEY_OFF(temp_pagep, n) == BIGPAIR) {
+				__get_bigkey(hashp, temp_pagep, n, &key);
+				if (__call_hash(hashp,
+				    key.data, key.size) == obucket)
+					add_bigptr(hashp, &old_ii,
+					    DATA_OFF(temp_pagep, n));
+				else
+					add_bigptr(hashp, &new_ii,
+					    DATA_OFF(temp_pagep, n));
+			} else {
+				key.size = off - KEY_OFF(temp_pagep, n);
+				key.data = KEY(temp_pagep, n);
+				off = KEY_OFF(temp_pagep, n);
+				val.size = off - DATA_OFF(temp_pagep, n);
+				val.data = DATA(temp_pagep, n);
+				if (__call_hash(hashp,
+				    key.data, key.size) == obucket)
+					__addel(hashp, &old_ii, &key, &val,
+					    NO_EXPAND, 1);
+				else
+					__addel(hashp, &new_ii, &key, &val,
+					    NO_EXPAND, 1);
+				off = DATA_OFF(temp_pagep, n);
+			}
+		}
+		next_pgno = NEXT_PGNO(temp_pagep);
+
+		/* Clear temp_page; if it's an overflow page, free it. */
+		if (!base_page)
+			__delete_page(hashp, temp_pagep, A_OVFL);
+		else
+			base_page = 0;
+		if (next_pgno != INVALID_PGNO)
+			temp_pagep = __get_page(hashp, next_pgno, A_RAW);
+		else
+			break;
+	}
+	return (0);
+}
+
+/*
+ * Add the given pair to the page.  
+ *
+ *
+ * Returns:
+ *       0 ==> OK
+ *	-1 ==> failure
+ */
+extern  int32_t
+#ifdef __STDC__
+__addel(HTAB *hashp, ITEM_INFO *item_info, const DBT *key, const DBT *val,
+    u_int32_t num_items, const u_int8_t expanding)
+#else
+__addel(hashp, item_info, key, val, num_items, expanding)
+	HTAB *hashp;
+	ITEM_INFO *item_info;
+	const DBT *key, *val;
+	u_int32_t num_items;
+	const u_int32_t expanding;
+#endif
+{
+	PAGE16 *pagep;
+	int32_t do_expand;
+	db_pgno_t next_pgno;
+
+	do_expand = 0;
+
+	pagep = __get_page(hashp,
+	    item_info->seek_found_page != 0 ?
+	    item_info->seek_found_page : item_info->pgno, A_RAW);
+	if (!pagep)
+		return (-1);
+
+	/* Advance to first page in chain with room for item. */
+	while (NUM_ENT(pagep) && NEXT_PGNO(pagep) != INVALID_PGNO) {
+		/* 
+		 * This may not be the end of the chain, but the pair may fit
+		 * anyway.
+		 */
+		if (ISBIG(PAIRSIZE(key, val), hashp) && BIGPAIRFITS(pagep))
+			break;
+		if (PAIRFITS(pagep, key, val))
+			break;
+		next_pgno = NEXT_PGNO(pagep);
+		__put_page(hashp, pagep, A_RAW, 0);
+		pagep = (PAGE16 *)__get_page(hashp, next_pgno, A_RAW);
+		if (!pagep)
+			return (-1);
+	}
+
+	if ((ISBIG(PAIRSIZE(key, val), hashp) &&
+	     !BIGPAIRFITS(pagep)) ||
+	    (!ISBIG(PAIRSIZE(key, val), hashp) &&
+	     !PAIRFITS(pagep, key, val))) {
+		do_expand = 1;
+		pagep = __add_ovflpage(hashp, pagep);
+		if (!pagep)
+			return (-1);
+
+		if ((ISBIG(PAIRSIZE(key, val), hashp) &&
+		     !BIGPAIRFITS(pagep)) ||
+		    (!ISBIG(PAIRSIZE(key, val), hashp) &&
+		     !PAIRFITS(pagep, key, val))) {
+			__put_page(hashp, pagep, A_RAW, 0);
+			return (-1);
+		}
+	}
+ 
+	/* At this point, we know the page fits, so we just add it */
+ 
+	if (ISBIG(PAIRSIZE(key, val), hashp)) {
+		if (__big_insert(hashp, pagep, key, val))
+			return (-1);
+	} else {
+		putpair((PAGE8 *)pagep, key, val);
+	}
+
+	/*
+	 * For splits, we are going to update item_info's page number
+	 * field, so that we can easily return to the same page the
+	 * next time we come in here.  For other operations, this shouldn't
+	 * matter, since adds are the last thing that happens before we
+	 * return to the user program.
+	 */
+	item_info->pgno = ADDR(pagep);
+
+	if (!expanding)
+		hashp->hdr.nkeys++;
+
+	/* Kludge: if this is a big page, then it's already been put. */
+	if (!ISBIG(PAIRSIZE(key, val), hashp))
+		__put_page(hashp, pagep, A_RAW, 1);
+
+	if (expanding)
+		item_info->caused_expand = 0;
+	else
+		switch (num_items) {
+		case NO_EXPAND:
+			item_info->caused_expand = 0;
+			break;
+		case UNKNOWN:
+			item_info->caused_expand |=
+			    (hashp->hdr.nkeys / hashp->hdr.max_bucket) >
+			    hashp->hdr.ffactor ||
+			    item_info->pgndx > hashp->hdr.ffactor;
+			break;
+		default:
+			item_info->caused_expand =
+			    num_items > hashp->hdr.ffactor ? 1 : do_expand;
+			break;
+		}
+	return (0);
+}
+
+/* 
+ * Special __addel used in big splitting; this one just puts the pointer
+ * to an already-allocated big page in the appropriate bucket.
+ */
+static int32_t
+#ifdef __STDC__
+add_bigptr(HTAB * hashp, ITEM_INFO * item_info, indx_t big_pgno)
+#else
+add_bigptr(hashp, item_info, big_pgno)
+	HTAB *hashp;
+	ITEM_INFO *item_info;
+	u_int32_t big_pgno;
+#endif
+{
+	PAGE16 *pagep;
+	db_pgno_t next_pgno;
+
+	pagep = __get_page(hashp, item_info->bucket, A_BUCKET);
+	if (!pagep)
+		return (-1);
+
+	/*
+	 * Note: in __addel(), we used item_info->pgno for the beginning of
+	 * our search for space.  Now, we use item_info->bucket, since we
+	 * know that the space required by a big pair on the base page is
+	 * quite small, and we may very well find that space early in the
+	 * chain.
+	 */
+
+	/* Find first page in chain that has space for a big pair. */
+	while (NUM_ENT(pagep) && (NEXT_PGNO(pagep) != INVALID_PGNO)) {
+		if (BIGPAIRFITS(pagep))
+			break;
+		next_pgno = NEXT_PGNO(pagep);
+		__put_page(hashp, pagep, A_RAW, 0);
+		pagep = __get_page(hashp, next_pgno, A_RAW);
+		if (!pagep)
+			return (-1);
+	}
+	if (!BIGPAIRFITS(pagep)) {
+		pagep = __add_ovflpage(hashp, pagep);
+		if (!pagep)
+			return (-1);
+#ifdef DEBUG
+		assert(BIGPAIRFITS(pagep));
+#endif
+	}
+	KEY_OFF(pagep, NUM_ENT(pagep)) = BIGPAIR;
+	DATA_OFF(pagep, NUM_ENT(pagep)) = big_pgno;
+	NUM_ENT(pagep) = NUM_ENT(pagep) + 1;
+
+	__put_page(hashp, pagep, A_RAW, 1);
+
+	return (0);
+}
+
+/*
+ *
+ * Returns:
+ *      pointer on success
+ *      NULL on error
+ */
+extern PAGE16 *
+__add_ovflpage(hashp, pagep)
+	HTAB *hashp;
+	PAGE16 *pagep;
+{
+	PAGE16 *new_pagep;
+	u_int16_t ovfl_num;
+
+	/* Check if we are dynamically determining the fill factor. */
+	if (hashp->hdr.ffactor == DEF_FFACTOR) {
+		hashp->hdr.ffactor = NUM_ENT(pagep) >> 1;
+		if (hashp->hdr.ffactor < MIN_FFACTOR)
+			hashp->hdr.ffactor = MIN_FFACTOR;
+	}
+	ovfl_num = overflow_page(hashp);
+	if (!ovfl_num)
+		return (NULL);
+
+	if (__new_page(hashp, (u_int32_t)ovfl_num, A_OVFL) != 0)
+		return (NULL);
+
+	if (!ovfl_num || !(new_pagep = __get_page(hashp, ovfl_num, A_OVFL)))
+		return (NULL);
+
+	NEXT_PGNO(pagep) = (db_pgno_t)OADDR_TO_PAGE(ovfl_num);
+	TYPE(new_pagep) = HASH_OVFLPAGE;
+
+	__put_page(hashp, pagep, A_RAW, 1);
+
+#ifdef HASH_STATISTICS
+	hash_overflows++;
+#endif
+	return (new_pagep);
+}
+
+/*
+ *
+ * Returns:
+ *      pointer on success
+ *      NULL on error
+ */
+extern PAGE16 *
+#ifdef __STDC__
+__add_bigpage(HTAB * hashp, PAGE16 * pagep, indx_t ndx, const u_int8_t
+    is_basepage)
+#else
+__add_bigpage(hashp, pagep, ndx, is_basepage)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	u_int32_t ndx;
+	const u_int32_t is_basepage;
+#endif
+{
+	PAGE16 *new_pagep;
+	u_int16_t ovfl_num;
+
+	ovfl_num = overflow_page(hashp);
+	if (!ovfl_num)
+		return (NULL);
+
+	if (__new_page(hashp, (u_int32_t)ovfl_num, A_OVFL) != 0)
+		return (NULL);
+
+	if (!ovfl_num || !(new_pagep = __get_page(hashp, ovfl_num, A_OVFL)))
+		return (NULL);
+
+	if (is_basepage) {
+		KEY_OFF(pagep, ndx) = BIGPAIR;
+		DATA_OFF(pagep, ndx) = (indx_t)ovfl_num;
+	} else
+		NEXT_PGNO(pagep) = ADDR(new_pagep);
+
+	__put_page(hashp, pagep, A_RAW, 1);
+
+	TYPE(new_pagep) = HASH_BIGPAGE;
+
+#ifdef HASH_STATISTICS
+	hash_bigpages++;
+#endif
+	return (new_pagep);
+}
+
+static void
+#ifdef __STDC__
+page_init(HTAB * hashp, PAGE16 * pagep, db_pgno_t pgno, u_int8_t type)
+#else
+page_init(hashp, pagep, pgno, type)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	db_pgno_t pgno;
+	u_int32_t type;
+#endif
+{
+	NUM_ENT(pagep) = 0;
+	PREV_PGNO(pagep) = NEXT_PGNO(pagep) = INVALID_PGNO;
+	TYPE(pagep) = type;
+	OFFSET(pagep) = hashp->hdr.bsize - 1;
+	/*
+	 * Note: since in the current version ADDR(pagep) == PREV_PGNO(pagep),
+	 * make sure that ADDR(pagep) is set after resetting PREV_PGNO(pagep).
+	 * We reset PREV_PGNO(pagep) just in case the macros are changed.
+	 */
+	ADDR(pagep) = pgno;
+
+	return;
+}
+
+int32_t
+__new_page(hashp, addr, addr_type)
+	HTAB *hashp;
+	u_int32_t addr;
+	int32_t addr_type;
+{
+	db_pgno_t paddr;
+	PAGE16 *pagep;
+
+	switch (addr_type) {		/* Convert page number. */
+	case A_BUCKET:
+		paddr = BUCKET_TO_PAGE(addr);
+		break;
+	case A_OVFL:
+	case A_BITMAP:
+		paddr = OADDR_TO_PAGE(addr);
+		break;
+	default:
+		paddr = addr;
+		break;
+	}
+	pagep = mpool_new(hashp->mp, &paddr, MPOOL_PAGE_REQUEST);
+	if (!pagep)
+		return (-1);
+#if DEBUG_SLOW
+	account_page(hashp, paddr, 1);
+#endif
+
+	if (addr_type != A_BITMAP)
+		page_init(hashp, pagep, paddr, HASH_PAGE);
+
+	__put_page(hashp, pagep, addr_type, 1);
+
+	return (0);
+}
+
+int32_t
+__delete_page(hashp, pagep, page_type)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	int32_t page_type;
+{
+	if (page_type == A_OVFL)
+		__free_ovflpage(hashp, pagep);
+	return (mpool_delete(hashp->mp, pagep));
+}
+
+static u_int8_t
+is_bitmap_pgno(hashp, pgno)
+	HTAB *hashp;
+	db_pgno_t pgno;
+{
+	int32_t i;
+
+	for (i = 0; i < hashp->nmaps; i++)
+		if (OADDR_TO_PAGE(hashp->hdr.bitmaps[i]) == pgno)
+			return (1);
+	return (0);
+}
+
+void
+__pgin_routine(pg_cookie, pgno, page)
+	void *pg_cookie;
+	db_pgno_t pgno;
+	void *page;
+{
+	HTAB *hashp;
+	PAGE16 *pagep;
+	int32_t max, i;
+
+	pagep = (PAGE16 *)page;
+	hashp = (HTAB *)pg_cookie;
+
+	/* 
+	 * There are the following cases for swapping: 
+	 * 0) New page that may be unitialized.
+	 * 1) Bucket page or overflow page.  Either swap
+	 *	the header or initialize the page.
+	 * 2) Bitmap page.  Swap the whole page!
+	 * 3) Header pages.  Not handled here; these are written directly
+	 *    to the file.
+	 */
+
+	if (NUM_ENT(pagep) == 0 && NEXT_PGNO(pagep) == 0 &&
+	    !is_bitmap_pgno(hashp, pgno)) {
+		/* XXX check for !0 LSN */
+		page_init(hashp, pagep, pgno, HASH_PAGE);
+		return;
+	}
+
+	if (hashp->hdr.lorder == DB_BYTE_ORDER)
+		return;
+	if (is_bitmap_pgno(hashp, pgno)) {
+		max = hashp->hdr.bsize >> 2;	/* divide by 4 bytes */
+		for (i = 0; i < max; i++)
+			M_32_SWAP(((int32_t *)pagep)[i]);
+	} else
+		swap_page_header_in(pagep);
+}
+
+void
+__pgout_routine(pg_cookie, pgno, page)
+	void *pg_cookie;
+	db_pgno_t pgno;
+	void *page;
+{
+	HTAB *hashp;
+	PAGE16 *pagep;
+	int32_t i, max;
+
+	pagep = (PAGE16 *)page;
+	hashp = (HTAB *)pg_cookie;
+
+	/* 
+	 * There are the following cases for swapping: 
+	 * 1) Bucket page or overflow page.  Just swap the header.
+	 * 2) Bitmap page.  Swap the whole page!
+	 * 3) Header pages.  Not handled here; these are written directly
+	 *    to the file.
+	 */
+
+	if (hashp->hdr.lorder == DB_BYTE_ORDER)
+		return;
+	if (is_bitmap_pgno(hashp, pgno)) {
+		max = hashp->hdr.bsize >> 2;	/* divide by 4 bytes */
+		for (i = 0; i < max; i++)
+			M_32_SWAP(((int32_t *)pagep)[i]);
+	} else
+		swap_page_header_out(pagep);
+}
+
+/*
+ *
+ * Returns:
+ *       0 ==> OK
+ *      -1 ==>failure
+ */
+extern int32_t
+__put_page(hashp, pagep, addr_type, is_dirty)
+	HTAB *hashp;
+	PAGE16 *pagep;
+	int32_t addr_type, is_dirty;
+{
+#if DEBUG_SLOW
+	account_page(hashp,
+	    ((BKT *)((char *)pagep - sizeof(BKT)))->pgno, -1);
+#endif
+
+	return (mpool_put(hashp->mp, pagep, (is_dirty ? MPOOL_DIRTY : 0)));
+}
+
+/*
+ * Returns:
+ *       0 indicates SUCCESS
+ *      -1 indicates FAILURE
+ */
+extern PAGE16 *
+__get_page(hashp, addr, addr_type)
+	HTAB *hashp;
+	u_int32_t addr;
+	int32_t addr_type;
+{
+	PAGE16 *pagep;
+	db_pgno_t paddr;
+
+	switch (addr_type) {			/* Convert page number. */
+	case A_BUCKET:
+		paddr = BUCKET_TO_PAGE(addr);
+		break;
+	case A_OVFL:
+	case A_BITMAP:
+		paddr = OADDR_TO_PAGE(addr);
+		break;
+	default:
+		paddr = addr;
+		break;
+	}
+	pagep = (PAGE16 *)mpool_get(hashp->mp, paddr, 0);
+
+#if DEBUG_SLOW
+	account_page(hashp, paddr, 1);
+#endif
+#ifdef DEBUG
+	assert(ADDR(pagep) == paddr || ADDR(pagep) == 0 ||
+	    addr_type == A_BITMAP || addr_type == A_HEADER);
+#endif
+
+	return (pagep);
+}
+
+static void
+swap_page_header_in(pagep)
+	PAGE16 *pagep;
+{
+	u_int32_t i;
+
+	/* can leave type and filler alone, since they're 1-byte quantities */
+
+	M_32_SWAP(PREV_PGNO(pagep));
+	M_32_SWAP(NEXT_PGNO(pagep));
+	M_16_SWAP(NUM_ENT(pagep));
+	M_16_SWAP(OFFSET(pagep));
+
+	for (i = 0; i < NUM_ENT(pagep); i++) {
+		M_16_SWAP(KEY_OFF(pagep, i));
+		M_16_SWAP(DATA_OFF(pagep, i));
+	}
+}
+
+static void
+swap_page_header_out(pagep)
+	PAGE16 *pagep;
+{
+	u_int32_t i;
+
+	for (i = 0; i < NUM_ENT(pagep); i++) {
+		M_16_SWAP(KEY_OFF(pagep, i));
+		M_16_SWAP(DATA_OFF(pagep, i))
+	}
+
+	/* can leave type and filler alone, since they're 1-byte quantities */
+
+	M_32_SWAP(PREV_PGNO(pagep));
+	M_32_SWAP(NEXT_PGNO(pagep));
+	M_16_SWAP(NUM_ENT(pagep));
+	M_16_SWAP(OFFSET(pagep));
+}
+
+#define BYTE_MASK	((1 << INT32_T_BYTE_SHIFT) -1)
+/*
+ * Initialize a new bitmap page.  Bitmap pages are left in memory
+ * once they are read in.
+ */
+extern int32_t
+__ibitmap(hashp, pnum, nbits, ndx)
+	HTAB *hashp;
+	int32_t pnum, nbits, ndx;
+{
+	u_int32_t *ip;
+	int32_t clearbytes, clearints;
+
+	/* make a new bitmap page */
+	if (__new_page(hashp, pnum, A_BITMAP) != 0)
+		return (1);
+	if (!(ip = (u_int32_t *)__get_page(hashp, pnum, A_BITMAP)))
+		return (1);
+	hashp->nmaps++;
+	clearints = ((nbits - 1) >> INT32_T_BYTE_SHIFT) + 1;
+	clearbytes = clearints << INT32_T_TO_BYTE;
+	(void)memset((int8_t *)ip, 0, clearbytes);
+	(void)memset((int8_t *)ip + clearbytes,
+	    0xFF, hashp->hdr.bsize - clearbytes);
+	ip[clearints - 1] = ALL_SET << (nbits & BYTE_MASK);
+	SETBIT(ip, 0);
+	hashp->hdr.bitmaps[ndx] = (u_int16_t)pnum;
+	hashp->mapp[ndx] = ip;
+	return (0);
+}
+
+static u_int32_t
+first_free(map)
+	u_int32_t map;
+{
+	u_int32_t i, mask;
+
+	for (mask = 0x1, i = 0; i < BITS_PER_MAP; i++) {
+		if (!(mask & map))
+			return (i);
+		mask = mask << 1;
+	}
+	return (i);
+}
+
+/*
+ * returns 0 on error
+ */
+static u_int16_t
+overflow_page(hashp)
+	HTAB *hashp;
+{
+	u_int32_t *freep;
+	int32_t bit, first_page, free_bit, free_page, i, in_use_bits, j;
+	int32_t max_free, offset, splitnum;
+	u_int16_t addr;
+#ifdef DEBUG2
+	int32_t tmp1, tmp2;
+#endif
+
+	splitnum = hashp->hdr.ovfl_point;
+	max_free = hashp->hdr.spares[splitnum];
+
+	free_page = (max_free - 1) >> (hashp->hdr.bshift + BYTE_SHIFT);
+	free_bit = (max_free - 1) & ((hashp->hdr.bsize << BYTE_SHIFT) - 1);
+
+	/*
+	 * Look through all the free maps to find the first free block.
+ 	 * The compiler under -Wall will complain that freep may be used
+	 * before being set, however, this loop will ALWAYS get executed
+	 * at least once, so freep is guaranteed to be set.
+	 */
+	first_page = hashp->hdr.last_freed >> (hashp->hdr.bshift + BYTE_SHIFT);
+	for (i = first_page; i <= free_page; i++) {
+		if (!(freep = fetch_bitmap(hashp, i)))
+			return (0);
+		if (i == free_page)
+			in_use_bits = free_bit;
+		else
+			in_use_bits = (hashp->hdr.bsize << BYTE_SHIFT) - 1;
+
+		if (i == first_page) {
+			bit = hashp->hdr.last_freed &
+			    ((hashp->hdr.bsize << BYTE_SHIFT) - 1);
+			j = bit / BITS_PER_MAP;
+			bit = bit & ~(BITS_PER_MAP - 1);
+		} else {
+			bit = 0;
+			j = 0;
+		}
+		for (; bit <= in_use_bits; j++, bit += BITS_PER_MAP)
+			if (freep[j] != ALL_SET)
+				goto found;
+	}
+
+	/* No Free Page Found */
+	hashp->hdr.last_freed = hashp->hdr.spares[splitnum];
+	hashp->hdr.spares[splitnum]++;
+	offset = hashp->hdr.spares[splitnum] -
+	    (splitnum ? hashp->hdr.spares[splitnum - 1] : 0);
+
+#define	OVMSG	"HASH: Out of overflow pages.  Increase page size\n"
+
+	if (offset > SPLITMASK) {
+		if (++splitnum >= NCACHED) {
+			(void)write(STDERR_FILENO, OVMSG, sizeof(OVMSG) - 1);
+			return (0);
+		}
+		hashp->hdr.ovfl_point = splitnum;
+		hashp->hdr.spares[splitnum] = hashp->hdr.spares[splitnum - 1];
+		hashp->hdr.spares[splitnum - 1]--;
+		offset = 1;
+	}
+	/* Check if we need to allocate a new bitmap page. */
+	if (free_bit == (hashp->hdr.bsize << BYTE_SHIFT) - 1) {
+		free_page++;
+		if (free_page >= NCACHED) {
+			(void)write(STDERR_FILENO, OVMSG, sizeof(OVMSG) - 1);
+			return (0);
+		}
+		/*
+		 * This is tricky.  The 1 indicates that you want the new page
+		 * allocated with 1 clear bit.  Actually, you are going to
+		 * allocate 2 pages from this map.  The first is going to be
+		 * the map page, the second is the overflow page we were
+		 * looking for.  The __ibitmap routine automatically, sets
+		 * the first bit of itself to indicate that the bitmap itself
+		 * is in use.  We would explicitly set the second bit, but
+		 * don't have to if we tell __ibitmap not to leave it clear
+		 * in the first place.
+		 */
+		if (__ibitmap(hashp,
+		    (int32_t)OADDR_OF(splitnum, offset), 1, free_page))
+			return (0);
+		hashp->hdr.spares[splitnum]++;
+#ifdef DEBUG2
+		free_bit = 2;
+#endif
+		offset++;
+		if (offset > SPLITMASK) {
+			if (++splitnum >= NCACHED) {
+				(void)write(STDERR_FILENO,
+				    OVMSG, sizeof(OVMSG) - 1);
+				return (0);
+			}
+			hashp->hdr.ovfl_point = splitnum;
+			hashp->hdr.spares[splitnum] =
+			    hashp->hdr.spares[splitnum - 1];
+			hashp->hdr.spares[splitnum - 1]--;
+			offset = 0;
+		}
+	} else {
+		/*
+		 * Free_bit addresses the last used bit.  Bump it to address
+		 * the first available bit.
+		 */
+		free_bit++;
+		SETBIT(freep, free_bit);
+	}
+
+	/* Calculate address of the new overflow page */
+	addr = OADDR_OF(splitnum, offset);
+#ifdef DEBUG2
+	(void)fprintf(stderr, "OVERFLOW_PAGE: ADDR: %d BIT: %d PAGE %d\n",
+	    addr, free_bit, free_page);
+#endif
+
+	if (OADDR_TO_PAGE(addr) > MAX_PAGES(hashp)) {
+		(void)write(STDERR_FILENO, OVMSG, sizeof(OVMSG) - 1);
+		return (0);
+	}
+	return (addr);
+
+found:
+	bit = bit + first_free(freep[j]);
+	SETBIT(freep, bit);
+#ifdef DEBUG2
+	tmp1 = bit;
+	tmp2 = i;
+#endif
+	/*
+	 * Bits are addressed starting with 0, but overflow pages are addressed
+	 * beginning at 1. Bit is a bit address number, so we need to increment
+	 * it to convert it to a page number.
+	 */
+	bit = 1 + bit + (i * (hashp->hdr.bsize << BYTE_SHIFT));
+	if (bit >= hashp->hdr.last_freed)
+		hashp->hdr.last_freed = bit - 1;
+
+	/* Calculate the split number for this page */
+	for (i = 0; i < splitnum && (bit > hashp->hdr.spares[i]); i++);
+	offset = (i ? bit - hashp->hdr.spares[i - 1] : bit);
+	if (offset >= SPLITMASK)
+		return (0);	/* Out of overflow pages */
+	addr = OADDR_OF(i, offset);
+#ifdef DEBUG2
+	(void)fprintf(stderr, "OVERFLOW_PAGE: ADDR: %d BIT: %d PAGE %d\n",
+	    addr, tmp1, tmp2);
+#endif
+
+	if (OADDR_TO_PAGE(addr) > MAX_PAGES(hashp)) {
+		(void)write(STDERR_FILENO, OVMSG, sizeof(OVMSG) - 1);
+		return (0);
+	}
+	/* Allocate and return the overflow page */
+	return (addr);
+}
+
+#ifdef DEBUG
+int
+bucket_to_page(hashp, n)
+	HTAB *hashp;
+	int n;
+{
+	int ret_val;
+
+	ret_val = n + hashp->hdr.hdrpages;
+	if (n != 0)
+		ret_val += hashp->hdr.spares[__log2(n + 1) - 1];
+	return (ret_val);
+}
+
+int32_t
+oaddr_to_page(hashp, n)
+	HTAB *hashp;
+	int n;
+{
+	int ret_val, temp;
+
+	temp = (1 << SPLITNUM(n)) - 1;
+	ret_val = bucket_to_page(hashp, temp);
+	ret_val += (n & SPLITMASK);
+
+	return (ret_val);
+}
+#endif /* DEBUG */
+
+static indx_t
+page_to_oaddr(hashp, pgno)
+	HTAB *hashp;
+	db_pgno_t pgno;
+{
+	int32_t sp, ret_val;
+
+	/*
+	 * To convert page number to overflow address:
+	 *
+	 * 1.  Find a starting split point -- use 0 since there are only
+	 *     32 split points.
+	 * 2.  Find the split point s.t. 2^sp + hdr.spares[sp] < pgno and
+	 *     2^(sp+1) = hdr.spares[sp+1] > pgno.  The overflow address will
+	 *     be located at sp.
+	 * 3.  return...
+	 */
+	pgno -= hashp->hdr.hdrpages;
+	for (sp = 0; sp < NCACHED; sp++)
+		if (POW2(sp) + hashp->hdr.spares[sp] < pgno &&
+		    (POW2(sp + 1) + hashp->hdr.spares[sp + 1]) > pgno)
+			break;
+
+	ret_val = OADDR_OF(sp + 1,
+	    pgno - ((POW2(sp + 1) - 1) + hashp->hdr.spares[sp]));
+#ifdef DEBUG
+	assert(OADDR_TO_PAGE(ret_val) == (pgno + hashp->hdr.hdrpages));
+#endif
+	return (ret_val);
+}
+
+/*
+ * Mark this overflow page as free.
+ */
+extern void
+__free_ovflpage(hashp, pagep)
+	HTAB *hashp;
+	PAGE16 *pagep;
+{
+	u_int32_t *freep;
+	int32_t bit_address, free_page, free_bit;
+	u_int16_t addr, ndx;
+
+	addr = page_to_oaddr(hashp, ADDR(pagep));
+
+#ifdef DEBUG2
+	(void)fprintf(stderr, "Freeing %d\n", addr);
+#endif
+	ndx = ((u_int16_t)addr) >> SPLITSHIFT;
+	bit_address =
+	    (ndx ? hashp->hdr.spares[ndx - 1] : 0) + (addr & SPLITMASK) - 1;
+	if (bit_address < hashp->hdr.last_freed)
+		hashp->hdr.last_freed = bit_address;
+	free_page = (bit_address >> (hashp->hdr.bshift + BYTE_SHIFT));
+	free_bit = bit_address & ((hashp->hdr.bsize << BYTE_SHIFT) - 1);
+
+	freep = fetch_bitmap(hashp, free_page);
+#ifdef DEBUG
+	/*
+	 * This had better never happen.  It means we tried to read a bitmap
+	 * that has already had overflow pages allocated off it, and we
+	 * failed to read it from the file.
+	 */
+	if (!freep)
+		assert(0);
+#endif
+	CLRBIT(freep, free_bit);
+#ifdef DEBUG2
+	(void)fprintf(stderr, "FREE_OVFLPAGE: ADDR: %d BIT: %d PAGE %d\n",
+	    obufp->addr, free_bit, free_page);
+#endif
+}
+
+static u_int32_t *
+fetch_bitmap(hashp, ndx)
+	HTAB *hashp;
+	int32_t ndx;
+{
+	if (ndx >= hashp->nmaps)
+		return (NULL);
+	if (!hashp->mapp[ndx])
+	    hashp->mapp[ndx] = (u_int32_t *)__get_page(hashp,
+	        hashp->hdr.bitmaps[ndx], A_BITMAP);
+
+	return (hashp->mapp[ndx]);
+}
+
+#ifdef DEBUG_SLOW
+static void
+account_page(hashp, pgno, inout)
+	HTAB *hashp;
+	db_pgno_t pgno;
+	int inout;
+{
+	static struct {
+		db_pgno_t pgno;
+		int times;
+	} list[100];
+	static int last;
+	int i, j;
+
+	if (inout == -1)			/* XXX: Kluge */
+		inout = 0;
+
+	/* Find page in list. */
+	for (i = 0; i < last; i++)
+		if (list[i].pgno == pgno)
+			break;
+	/* Not found. */
+	if (i == last) {
+		list[last].times = inout;
+		list[last].pgno = pgno;
+		last++;
+	}
+	list[i].times = inout;
+	if (list[i].times == 0) {
+		for (j = i; j < last; j++)
+			list[j] = list[j + 1];
+		last--;
+	}
+	for (i = 0; i < last; i++, list[i].times++)
+		if (list[i].times > 20 && !is_bitmap_pgno(hashp, list[i].pgno))
+			(void)fprintf(stderr,
+			    "Warning: pg %d has been out for %d times\n",
+			    list[i].pgno, list[i].times);
+}
+#endif /* DEBUG_SLOW */
diff --git a/src/plugins/kdb/db2/libdb2/hash/hsearch.c b/src/plugins/kdb/db2/libdb2/hash/hsearch.c
new file mode 100644
index 0000000000..02ff7ef843
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/hsearch.c
@@ -0,0 +1,107 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)hsearch.c	8.5 (Berkeley) 9/21/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <fcntl.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "search.h"
+
+static DB *dbp = NULL;
+static ENTRY retval;
+
+extern int
+hcreate(nel)
+	u_int nel;
+{
+	HASHINFO info;
+
+	info.nelem = nel;
+	info.bsize = 256;
+	info.ffactor = 8;
+	info.cachesize = 0;
+	info.hash = NULL;
+	info.lorder = 0;
+	dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR | O_BINARY, 0600, &info, 0);
+	return (dbp != NULL);
+}
+
+extern ENTRY *
+hsearch(item, action)
+	ENTRY item;
+	ACTION action;
+{
+	DBT key, val;
+	int status;
+
+	if (!dbp)
+		return (NULL);
+	key.data = (u_char *)item.key;
+	key.size = strlen(item.key) + 1;
+
+	if (action == ENTER) {
+		val.data = (u_char *)item.data;
+		val.size = strlen(item.data) + 1;
+		status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE);
+		if (status)
+			return (NULL);
+	} else {
+		/* FIND */
+		status = (dbp->get)(dbp, &key, &val, 0);
+		if (status)
+			return (NULL);
+		else
+			item.data = (char *)val.data;
+	}
+	retval.key = item.key;
+	retval.data = item.data;
+	return (&retval);
+}
+
+extern void
+hdestroy()
+{
+	if (dbp) {
+		(void)(dbp->close)(dbp);
+		dbp = NULL;
+	}
+}
diff --git a/src/plugins/kdb/db2/libdb2/hash/page.h b/src/plugins/kdb/db2/libdb2/hash/page.h
new file mode 100644
index 0000000000..8ef8a2e294
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/page.h
@@ -0,0 +1,178 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)page.h	8.4 (Berkeley) 11/7/95
+ */
+
+#define HI_MASK 0xFFFF0000
+#define LO_MASK (~HI_MASK)
+
+#define HI(N) ((u_int16_t)(((N) & HI_MASK) >> 16))
+#define LO(N) ((u_int16_t)((N) & LO_MASK))
+
+/* Constants for big key page overhead information. */
+#define NUMSHORTS	0
+#define KEYLEN		1
+#define DATALEN 	2
+#define NEXTPAGE 	3
+
+/*
+ * Hash pages store meta-data beginning at the top of the page (offset 0)
+ * and key/data values beginning at the bottom of the page (offset pagesize).
+ * Fields are always accessed via macros so that we can change the page
+ * format without too much pain.  The only changes that will require massive
+ * code changes are if we no longer store key/data offsets next to each
+ * other (since we use that fact to compute key lengths).  In the accessor
+ * macros below, P means a pointer to the page, I means an index of the
+ * particular entry being accessed.
+ * 
+ * Hash base page format
+ * BYTE ITEM			NBYTES 	TYPE		ACCESSOR MACRO
+ * ---- ------------------	------	--------	--------------
+ * 0	previous page number 	4	db_pgno_t		PREV_PGNO(P)
+ * 4	next page number	4	db_pgno_t		NEXT_PGNO(P)
+ * 8	# pairs on page		2	indx_t		NUM_ENT(P)
+ * 10	page type		1	u_int8_t	TYPE(P)
+ * 11	padding			1	u_int8_t	none
+ * 12	highest free byte	2	indx_t		OFFSET(P)
+ * 14	key offset 0		2	indx_t		KEY_OFF(P, I)
+ * 16	data offset 0		2	indx_t		DATA_OFF(P, I)
+ * 18	key  offset 1		2	indx_t		KEY_OFF(P, I)
+ * 20	data offset 1		2	indx_t		DATA_OFF(P, I)
+ * ...etc...
+ */
+
+/* Indices (in bytes) of the beginning of each of these entries */
+#define I_PREV_PGNO	 0
+#define I_NEXT_PGNO	 4
+#define I_ENTRIES	 8
+#define I_TYPE		10
+#define I_HF_OFFSET	12
+
+/* Overhead is everything prior to the first key/data pair. */
+#define PAGE_OVERHEAD	(I_HF_OFFSET + sizeof(indx_t))
+
+/* To allocate a pair, we need room for one key offset and one data offset. */
+#define PAIR_OVERHEAD	((sizeof(indx_t) << 1))
+
+/* Use this macro to extract a value of type T from page P at offset O. */
+#define REFERENCE(P, T, O)  (((T *)((u_int8_t *)(P) + O))[0])
+
+/*
+ * Use these macros to access fields on a page; P is a PAGE16 *.
+ */
+#define NUM_ENT(P)	(REFERENCE((P), indx_t, I_ENTRIES))
+#define PREV_PGNO(P)	(REFERENCE((P), db_pgno_t, I_PREV_PGNO))
+#define NEXT_PGNO(P)	(REFERENCE((P), db_pgno_t, I_NEXT_PGNO))
+#define TYPE(P)		(REFERENCE((P), u_int8_t, I_TYPE))
+#define OFFSET(P)	(REFERENCE((P), indx_t, I_HF_OFFSET))
+/*
+ * We need to store a page's own address on each page (unlike the Btree
+ * access method which needs the previous page).  We use the PREV_PGNO
+ * field to store our own page number.
+ */
+#define ADDR(P)		(PREV_PGNO((P)))
+
+/* Extract key/data offsets and data for a given index. */
+#define DATA_OFF(P, N) \
+	REFERENCE(P, indx_t, PAGE_OVERHEAD + N * PAIR_OVERHEAD + sizeof(indx_t))
+#define KEY_OFF(P, N) \
+	REFERENCE(P, indx_t, PAGE_OVERHEAD + N * PAIR_OVERHEAD)
+
+#define KEY(P, N)	(((PAGE8 *)(P)) + KEY_OFF((P), (N)))
+#define DATA(P, N)	(((PAGE8 *)(P)) + DATA_OFF((P), (N)))
+
+/*
+ * Macros used to compute various sizes on a page.
+ */
+#define	PAIRSIZE(K, D)	(PAIR_OVERHEAD + (K)->size + (D)->size)
+#define BIGOVERHEAD	(4 * sizeof(u_int16_t))
+#define KEYSIZE(K)	(4 * sizeof(u_int16_t) + (K)->size);
+#define OVFLSIZE	(2 * sizeof(u_int16_t))
+#define BIGPAGEOVERHEAD (4 * sizeof(u_int16_t))
+#define BIGPAGEOFFSET   4
+#define BIGPAGESIZE(P)	((P)->BSIZE - BIGPAGEOVERHEAD)
+
+#define PAGE_META(N)	(((N) + 3) * sizeof(u_int16_t))
+#define MINFILL 0.75
+#define ISBIG(N, P)	(((N) > ((P)->hdr.bsize * MINFILL)) ? 1 : 0)
+
+#define ITEMSIZE(I)    (sizeof(u_int16_t) + (I)->size)
+
+/*
+ * Big key/data pages use a different page format.  They have a single
+ * key/data "pair" containing the length of the key and data instead
+ * of offsets.
+ */
+#define BIGKEYLEN(P)	(KEY_OFF((P), 0))
+#define BIGDATALEN(P)	(DATA_OFF((P), 0))
+#define BIGKEY(P)	(((PAGE8 *)(P)) + PAGE_OVERHEAD + PAIR_OVERHEAD)
+#define BIGDATA(P) \
+	(((PAGE8 *)(P)) + PAGE_OVERHEAD + PAIR_OVERHEAD + KEY_OFF((P), 0))
+
+
+#define OVFLPAGE	0
+#define BIGPAIR		0
+#define INVALID_PGNO	0xFFFFFFFF
+
+typedef unsigned short PAGE16;
+typedef unsigned char  PAGE8;
+
+#define A_BUCKET	0
+#define A_OVFL		1
+#define A_BITMAP	2
+#define A_RAW		4
+#define A_HEADER	5
+
+#define PAIRFITS(P,K,D)	((PAIRSIZE((K),(D))) <= FREESPACE((P)))
+#define BIGPAIRFITS(P)	((FREESPACE((P)) >= PAIR_OVERHEAD))
+/*
+ * Since these are all unsigned, we need to guarantee that we never go
+ * negative.  Offset values are 0-based and overheads are one based (i.e.
+ * one byte of overhead is 1, not 0), so we need to convert OFFSETs to
+ * 1-based counting before subtraction.
+ */
+#define FREESPACE(P) \
+	((OFFSET((P)) + 1 - PAGE_OVERHEAD - (NUM_ENT((P)) * PAIR_OVERHEAD)))
+
+/* 
+ * Overhead on header pages is just one word -- the length of the
+ * header info stored on that page.
+ */
+#define HEADER_OVERHEAD 4
+
+#define HASH_PAGE	2
+#define HASH_BIGPAGE	3
+#define HASH_OVFLPAGE	4
diff --git a/src/plugins/kdb/db2/libdb2/hash/page.h.patch b/src/plugins/kdb/db2/libdb2/hash/page.h.patch
new file mode 100644
index 0000000000..4a0311fea3
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/page.h.patch
@@ -0,0 +1,42 @@
+*** /tmp/,RCSt1a21720	Wed Apr  3 11:49:55 1996
+--- page.h	Wed Apr  3 08:42:25 1996
+***************
+*** 158,163
+  
+  #define PAIRFITS(P,K,D)	((PAIRSIZE((K),(D))) <= FREESPACE((P)))
+  #define BIGPAIRFITS(P)	((FREESPACE((P)) >= PAIR_OVERHEAD))
+  #define FREESPACE(P) \
+  	((OFFSET((P)) - PAGE_OVERHEAD - (NUM_ENT((P)) * PAIR_OVERHEAD)))
+  
+
+--- 158,169 -----
+  
+  #define PAIRFITS(P,K,D)	((PAIRSIZE((K),(D))) <= FREESPACE((P)))
+  #define BIGPAIRFITS(P)	((FREESPACE((P)) >= PAIR_OVERHEAD))
++ /*
++  * Since these are all unsigned, we need to guarantee that we never go
++  * negative.  Offset values are 0-based and overheads are one based (i.e.
++  * one byte of overhead is 1, not 0), so we need to convert OFFSETs to
++  * 1-based counting before subtraction.
++  */
+  #define FREESPACE(P) \
+  	((OFFSET((P)) + 1 - PAGE_OVERHEAD - (NUM_ENT((P)) * PAIR_OVERHEAD)))
+  
+***************
+*** 159,165
+  #define PAIRFITS(P,K,D)	((PAIRSIZE((K),(D))) <= FREESPACE((P)))
+  #define BIGPAIRFITS(P)	((FREESPACE((P)) >= PAIR_OVERHEAD))
+  #define FREESPACE(P) \
+! 	((OFFSET((P)) - PAGE_OVERHEAD - (NUM_ENT((P)) * PAIR_OVERHEAD)))
+  
+  /* 
+   * Overhead on header pages is just one word -- the length of the
+
+--- 165,171 -----
+   * 1-based counting before subtraction.
+   */
+  #define FREESPACE(P) \
+! 	((OFFSET((P)) + 1 - PAGE_OVERHEAD - (NUM_ENT((P)) * PAIR_OVERHEAD)))
+  
+  /* 
+   * Overhead on header pages is just one word -- the length of the
diff --git a/src/plugins/kdb/db2/libdb2/hash/search.h b/src/plugins/kdb/db2/libdb2/hash/search.h
new file mode 100644
index 0000000000..6d6a0a82f4
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/hash/search.h
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)search.h	8.1 (Berkeley) 6/4/93
+ */
+
+/* Backward compatibility to hsearch interface. */
+typedef struct entry {
+	char *key;
+	char *data;
+} ENTRY;
+
+typedef enum {
+	FIND, ENTER
+} ACTION;
+
+#define hcreate		kdb2_hcreate
+#define hdestroy	kdb2_hdestroy
+#define hsearch		kdb2_hsearch
+
+int	 hcreate __P((unsigned int));
+void	 hdestroy __P((void));
+ENTRY	*hsearch __P((ENTRY, ACTION));
diff --git a/src/plugins/kdb/db2/libdb2/include/ChangeLog b/src/plugins/kdb/db2/libdb2/include/ChangeLog
new file mode 100644
index 0000000000..676bbd44a7
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/ChangeLog
@@ -0,0 +1,74 @@
+2004-05-23  Ken Raeburn  <raeburn@mit.edu>
+
+	* db-int.h: Include sys/param.h if available.
+
+2004-05-07  Ken Raeburn  <raeburn@mit.edu>
+
+	* db-int.h: Include machine/endian.h if available.  Check for
+	__LITTLE_ENDIAN__ and __BIG_ENDIAN__, _MIPSEB and _MIPSEL.
+
+2004-05-05  Ken Raeburn  <raeburn@mit.edu>
+
+	* db-int.h: Include stdlib.h, and endian.h if available.
+	(LITTLE_ENDIAN, BIG_ENDIAN, BYTE_ORDER): If not defined, and if
+	versions with one or two leading underscores are defined, define
+	the no-underscore form in terms of the with-underscore one.
+	(DB_BYTE_ORDER): Define by checking LITTLE_ENDIAN, BIG_ENDIAN, and
+	BYTE_ORDER; report an error if that doesn't work.  Don't check
+	WORDS_BIGENDIAN.
+
+2002-09-05  Ken Raeburn  <raeburn@mit.edu>
+
+	* db-int.h: If stdint.h or inttypes.h are found, include them.
+
+2002-08-23  Tom Yu  <tlyu@mit.edu>
+
+	* db.h: Add rename and prototype for bt_rseq(); this is a kludge
+	to avoid stuffing more things into the DB handle.
+
+2001-10-24  Ezra Peisach  <epeisach@mit.edu>
+
+	* db-config.h.in: Remove unnecessary definitions for including
+	db.h header file. These include WORDS_BIGENDIAN, ssize_t, u_short,
+	int8_t, u_int8_t, int16_t, u_int16_t, int32_t.
+
+2001-07-06  Ezra Peisach  <epeisach@mit.edu>
+
+	* db-dbm.h: New header file which lists the dbm interfaces.
+
+	* db-ndbm.h: Change prototype from dirinfo to dirfno which matches
+	code and ndbm API.
+
+2000-07-01  Tom Yu  <tlyu@mit.edu>
+
+	* db-config.h.in: New file; contains useful tidbits from
+	config.h.in generated by autoheader.  It is needed because
+	config.h.in has some thing we don't want to leak, like renaming of
+	missing libc functions.
+
+	* .cvsignore: Twiddle to reflect current reality.
+
+	* db-int.h: #include config.h since db.h includes db-config.h
+	which is not quite the same now.
+
+2000-06-30  Tom Yu  <tlyu@mit.edu>
+
+	* db-int.h: Remove renaming for memmove, strerror, mkstemp since
+	this is now done by the build system.
+
+Fri Feb 13 14:39:25 1998  Tom Yu  <tlyu@mit.edu>
+
+	* db-int.h: Additional renaming.
+
+	* db.h: Rename dbopen to avoid collision with NetBSD libc.
+
+	* db-ndbm.h: Rename lots of functions to avoid collisions with
+	native dbm implementations.
+
+	* db-int.h: Rename __hash_open to avoid potential collision with
+	NetBSD libc.
+
+Thu Aug 15 15:41:12 1996  Theodore Ts'o  <tytso@rsts-11.mit.edu>
+
+	* db-ndbm.h: Add prototypes for missing functions dbm_error() and
+	 	dbm_clearerror().
diff --git a/src/plugins/kdb/db2/libdb2/include/db-config.h.in b/src/plugins/kdb/db2/libdb2/include/db-config.h.in
new file mode 100644
index 0000000000..bcd7991b34
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/db-config.h.in
@@ -0,0 +1,16 @@
+/* include/db-config.h.in.  Derived from autoconf-generated config.h.in. */
+
+/* Define to empty if the keyword does not work.  */
+#undef const
+
+/* Define to `unsigned' if <sys/types.h> doesn't define.  */
+#undef size_t
+
+#undef u_char
+#undef u_int
+#undef u_long
+
+#undef u_int32_t
+
+/* The number of bytes in a int.  */
+#undef SIZEOF_INT
diff --git a/src/plugins/kdb/db2/libdb2/include/db-dbm.h b/src/plugins/kdb/db2/libdb2/include/db-dbm.h
new file mode 100644
index 0000000000..28c93786cd
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/db-dbm.h
@@ -0,0 +1,23 @@
+#ifndef _DBM_H_
+#define	_DBM_H_
+
+#include "db.h"
+
+#define dbminit		kdb2_dbminit
+#define fetch		kdb2_fetch
+#define firstkey	kdb2_firstkey
+#define nextkey		kdb2_nextkey
+#define delete		kdb2_delete
+#define store		kdb2_store
+
+__BEGIN_DECLS
+int	 dbminit __P((char *));
+datum	 fetch __P((datum));
+datum	 firstkey __P((void));
+datum	 nextkey __P((datum));
+int	 delete __P((datum));
+int	 store __P((datum, datum));
+__END_DECLS
+
+
+#endif
diff --git a/src/plugins/kdb/db2/libdb2/include/db-int.h b/src/plugins/kdb/db2/libdb2/include/db-int.h
new file mode 100644
index 0000000000..bbb22925aa
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/db-int.h
@@ -0,0 +1,283 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)compat.h	8.13 (Berkeley) 2/21/94
+ */
+
+#ifndef	_DB_INT_H_
+#define	_DB_INT_H_
+
+#include "config.h"
+#include "db.h"
+
+/* deal with autoconf-based stuff */
+
+#define DB_LITTLE_ENDIAN 1234
+#define DB_BIG_ENDIAN 4321
+
+#include <stdlib.h>
+#ifdef HAVE_ENDIAN_H
+# include <endian.h>
+#endif
+#ifdef HAVE_MACHINE_ENDIAN_H
+# include <machine/endian.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+/* Handle both BIG and LITTLE defined and BYTE_ORDER matches one, or
+   just one defined; both with and without leading underscores.
+
+   Ignore "PDP endian" machines, this code doesn't support them
+   anyways.  */
+#if !defined(LITTLE_ENDIAN) && !defined(BIG_ENDIAN) && !defined(BYTE_ORDER)
+# ifdef __LITTLE_ENDIAN__
+#  define LITTLE_ENDIAN __LITTLE_ENDIAN__
+# endif
+# ifdef __BIG_ENDIAN__
+#  define BIG_ENDIAN __BIG_ENDIAN__
+# endif
+#endif
+#if !defined(LITTLE_ENDIAN) && !defined(BIG_ENDIAN) && !defined(BYTE_ORDER)
+# ifdef _LITTLE_ENDIAN
+#  define LITTLE_ENDIAN _LITTLE_ENDIAN
+# endif
+# ifdef _BIG_ENDIAN
+#  define BIG_ENDIAN _BIG_ENDIAN
+# endif
+# ifdef _BYTE_ORDER
+#  define BYTE_ORDER _BYTE_ORDER
+# endif
+#endif
+#if !defined(LITTLE_ENDIAN) && !defined(BIG_ENDIAN) && !defined(BYTE_ORDER)
+# ifdef __LITTLE_ENDIAN
+#  define LITTLE_ENDIAN __LITTLE_ENDIAN
+# endif
+# ifdef __BIG_ENDIAN
+#  define BIG_ENDIAN __BIG_ENDIAN
+# endif
+# ifdef __BYTE_ORDER
+#  define BYTE_ORDER __BYTE_ORDER
+# endif
+#endif
+
+#if defined(_MIPSEL) && !defined(LITTLE_ENDIAN)
+# define LITTLE_ENDIAN
+#endif
+#if defined(_MIPSEB) && !defined(BIG_ENDIAN)
+# define BIG_ENDIAN
+#endif
+
+#if defined(LITTLE_ENDIAN) && defined(BIG_ENDIAN) && defined(BYTE_ORDER)
+# if LITTLE_ENDIAN == BYTE_ORDER
+#  define DB_BYTE_ORDER DB_LITTLE_ENDIAN
+# elif BIG_ENDIAN == BYTE_ORDER
+#  define DB_BYTE_ORDER DB_BIG_ENDIAN
+# else
+#  error "LITTLE_ENDIAN and BIG_ENDIAN defined, but can't determine byte order"
+# endif
+#elif defined(LITTLE_ENDIAN) && !defined(BIG_ENDIAN)
+# define DB_BYTE_ORDER DB_LITTLE_ENDIAN
+#elif defined(BIG_ENDIAN) && !defined(LITTLE_ENDIAN)
+# define DB_BYTE_ORDER DB_BIG_ENDIAN
+#else
+# error "can't determine byte order from included system headers"
+#endif
+
+#if 0
+#ifdef WORDS_BIGENDIAN
+#define DB_BYTE_ORDER DB_BIG_ENDIAN
+#else
+#define DB_BYTE_ORDER DB_LITTLE_ENDIAN
+#endif
+#endif
+
+/* end autoconf-based stuff */
+
+/* include necessary system header files */
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <limits.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+/* Tru64 5.1: int8_t is defined here, and stdint.h doesn't exist.  */
+#include <inttypes.h>
+#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+
+/* types and constants used for database structure */
+
+#define	MAX_PAGE_NUMBER	0xffffffff	/* >= # of pages in a file */
+typedef u_int32_t	db_pgno_t;
+#define	MAX_PAGE_OFFSET	65535		/* >= # of bytes in a page */
+typedef u_int16_t	indx_t;
+#define	MAX_REC_NUMBER	0xffffffff	/* >= # of records in a tree */
+typedef u_int32_t	recno_t;
+
+/*
+ * Little endian <==> big endian 32-bit swap macros.
+ *	M_32_SWAP	swap a memory location
+ *	P_32_SWAP	swap a referenced memory location
+ *	P_32_COPY	swap from one location to another
+ */
+#define	M_32_SWAP(a) {							\
+	u_int32_t _tmp = a;						\
+	((char *)&a)[0] = ((char *)&_tmp)[3];				\
+	((char *)&a)[1] = ((char *)&_tmp)[2];				\
+	((char *)&a)[2] = ((char *)&_tmp)[1];				\
+	((char *)&a)[3] = ((char *)&_tmp)[0];				\
+}
+#define	P_32_SWAP(a) {							\
+	u_int32_t _tmp = *(u_int32_t *)a;				\
+	((char *)a)[0] = ((char *)&_tmp)[3];				\
+	((char *)a)[1] = ((char *)&_tmp)[2];				\
+	((char *)a)[2] = ((char *)&_tmp)[1];				\
+	((char *)a)[3] = ((char *)&_tmp)[0];				\
+}
+#define	P_32_COPY(a, b) {						\
+	((char *)&(b))[0] = ((char *)&(a))[3];				\
+	((char *)&(b))[1] = ((char *)&(a))[2];				\
+	((char *)&(b))[2] = ((char *)&(a))[1];				\
+	((char *)&(b))[3] = ((char *)&(a))[0];				\
+}
+
+/*
+ * Little endian <==> big endian 16-bit swap macros.
+ *	M_16_SWAP	swap a memory location
+ *	P_16_SWAP	swap a referenced memory location
+ *	P_16_COPY	swap from one location to another
+ */
+#define	M_16_SWAP(a) {							\
+	u_int16_t _tmp = a;						\
+	((char *)&a)[0] = ((char *)&_tmp)[1];				\
+	((char *)&a)[1] = ((char *)&_tmp)[0];				\
+}
+#define	P_16_SWAP(a) {							\
+	u_int16_t _tmp = *(u_int16_t *)a;				\
+	((char *)a)[0] = ((char *)&_tmp)[1];				\
+	((char *)a)[1] = ((char *)&_tmp)[0];				\
+}
+#define	P_16_COPY(a, b) {						\
+	((char *)&(b))[0] = ((char *)&(a))[1];				\
+	((char *)&(b))[1] = ((char *)&(a))[0];				\
+}
+
+/* open functions for each database type, used in dbopen() */
+
+#define __bt_open	__kdb2_bt_open
+#define __hash_open	__kdb2_hash_open
+#define __rec_open	__kdb2_rec_open
+#define __dbpanic	__kdb2_dbpanic
+
+DB	*__bt_open __P((const char *, int, int, const BTREEINFO *, int));
+DB	*__hash_open __P((const char *, int, int, const HASHINFO *, int));
+DB	*__rec_open __P((const char *, int, int, const RECNOINFO *, int));
+void	 __dbpanic __P((DB *dbp));
+
+/*
+ * There is no portable way to figure out the maximum value of a file
+ * offset, so we put it here.
+ */
+#ifdef	OFF_T_MAX
+#define	DB_OFF_T_MAX	OFF_T_MAX
+#else
+#define	DB_OFF_T_MAX	LONG_MAX
+#endif
+
+#ifndef O_ACCMODE			/* POSIX 1003.1 access mode mask. */
+#define	O_ACCMODE	(O_RDONLY|O_WRONLY|O_RDWR)
+#endif
+
+/*
+ * If you can't provide lock values in the open(2) call.  Note, this
+ * allows races to happen.
+ */
+#ifndef O_EXLOCK			/* 4.4BSD extension. */
+#define	O_EXLOCK	0
+#endif
+
+#ifndef O_SHLOCK			/* 4.4BSD extension. */
+#define	O_SHLOCK	0
+#endif
+
+#ifndef EFTYPE
+#define	EFTYPE		EINVAL		/* POSIX 1003.1 format errno. */
+#endif
+
+#ifndef	STDERR_FILENO
+#define	STDIN_FILENO	0		/* ANSI C #defines */
+#define	STDOUT_FILENO	1
+#define	STDERR_FILENO	2
+#endif
+
+#ifndef SEEK_END
+#define	SEEK_SET	0		/* POSIX 1003.1 seek values */
+#define	SEEK_CUR	1
+#define	SEEK_END	2
+#endif
+
+#ifndef NULL				/* ANSI C #defines NULL everywhere. */
+#define	NULL		0
+#endif
+
+#ifndef	MAX				/* Usually found in <sys/param.h>. */
+#define	MAX(_a,_b)	((_a)<(_b)?(_b):(_a))
+#endif
+#ifndef	MIN				/* Usually found in <sys/param.h>. */
+#define	MIN(_a,_b)	((_a)<(_b)?(_a):(_b))
+#endif
+
+#ifndef S_ISDIR				/* POSIX 1003.1 file type tests. */
+#define	S_ISDIR(m)	((m & 0170000) == 0040000)	/* directory */
+#define	S_ISCHR(m)	((m & 0170000) == 0020000)	/* char special */
+#define	S_ISBLK(m)	((m & 0170000) == 0060000)	/* block special */
+#define	S_ISREG(m)	((m & 0170000) == 0100000)	/* regular file */
+#define	S_ISFIFO(m)	((m & 0170000) == 0010000)	/* fifo */
+#endif
+#ifndef S_ISLNK				/* BSD POSIX 1003.1 extensions */
+#define	S_ISLNK(m)	((m & 0170000) == 0120000)	/* symbolic link */
+#define	S_ISSOCK(m)	((m & 0170000) == 0140000)	/* socket */
+#endif
+
+#ifndef O_BINARY
+#define O_BINARY	0		/* Needed for Win32 compiles */
+#endif
+#endif /* _DB_INT_H_ */
diff --git a/src/plugins/kdb/db2/libdb2/include/db-ndbm.h b/src/plugins/kdb/db2/libdb2/include/db-ndbm.h
new file mode 100644
index 0000000000..e99f46fdc9
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/db-ndbm.h
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ndbm.h	8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef _NDBM_H_
+#define	_NDBM_H_
+
+#include "db.h"
+
+/* Map dbm interface onto db(3). */
+#define DBM_RDONLY	O_RDONLY
+
+/* Flags to dbm_store(). */
+#define DBM_INSERT      0
+#define DBM_REPLACE     1
+
+/*
+ * The db(3) support for ndbm(3) always appends this suffix to the
+ * file name to avoid overwriting the user's original database.
+ */
+#define	DBM_SUFFIX	".db"
+
+typedef struct {
+	char *dptr;
+	int dsize;
+} datum;
+
+typedef DB DBM;
+#define	dbm_pagfno(a)	DBM_PAGFNO_NOT_AVAILABLE
+
+#define dbm_close	kdb2_dbm_close
+#define dbm_delete	kdb2_dbm_delete
+#define dbm_fetch	kdb2_dbm_fetch
+#define dbm_firstkey	kdb2_dbm_firstkey
+#define dbm_forder	kdb2_dbm_forder
+#define dbm_nextkey	kdb2_dbm_nextkey
+#define dbm_open	kdb2_dbm_open
+#define dbm_store	kdb2_dbm_store
+#define dbm_dirfno	kdb2_dbm_dirfno
+#define dbm_error	kdb2_dbm_error
+#define dbm_clearerr	kdb2_dbm_clearerr
+
+__BEGIN_DECLS
+void	 dbm_close __P((DBM *));
+int	 dbm_delete __P((DBM *, datum));
+datum	 dbm_fetch __P((DBM *, datum));
+datum	 dbm_firstkey __P((DBM *));
+long	 dbm_forder __P((DBM *, datum));
+datum	 dbm_nextkey __P((DBM *));
+DBM	*dbm_open __P((const char *, int, int));
+int	 dbm_store __P((DBM *, datum, datum, int));
+int	 dbm_dirfno __P((DBM *));
+int	 dbm_error __P((DBM *db));
+int	 dbm_clearerr __P((DBM *db));
+__END_DECLS
+
+#endif /* !_NDBM_H_ */
diff --git a/src/plugins/kdb/db2/libdb2/include/db-queue.h b/src/plugins/kdb/db2/libdb2/include/db-queue.h
new file mode 100644
index 0000000000..40d32ccb6e
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/db-queue.h
@@ -0,0 +1,245 @@
+/* 
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)queue.h	8.3 (Berkeley) 12/13/93
+ */
+
+#ifndef	_QUEUE_H_
+#define	_QUEUE_H_
+
+/*
+ * This file defines three types of data structures: lists, tail queues,
+ * and circular queues.
+ *
+ * A list is headed by a single forward pointer (or an array of forward
+ * pointers for a hash table header). The elements are doubly linked
+ * so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list after
+ * an existing element or at the head of the list. A list may only be
+ * traversed in the forward direction.
+ *
+ * A tail queue is headed by a pair of pointers, one to the head of the
+ * list and the other to the tail of the list. The elements are doubly
+ * linked so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list after
+ * an existing element, at the head of the list, or at the end of the
+ * list. A tail queue may only be traversed in the forward direction.
+ *
+ * A circle queue is headed by a pair of pointers, one to the head of the
+ * list and the other to the tail of the list. The elements are doubly
+ * linked so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before or after
+ * an existing element, at the head of the list, or at the end of the list.
+ * A circle queue may be traversed in either direction, but has a more
+ * complex end of list detection.
+ *
+ * For details on the use of these macros, see the queue(3) manual page.
+ */
+
+/*
+ * List definitions.
+ */
+#define LIST_HEAD(name, type)						\
+struct name {								\
+	struct type *lh_first;	/* first element */			\
+}
+
+#define LIST_ENTRY(type)						\
+struct {								\
+	struct type *le_next;	/* next element */			\
+	struct type **le_prev;	/* address of previous next element */	\
+}
+
+/*
+ * List functions.
+ */
+#define	LIST_INIT(head) {						\
+	(head)->lh_first = NULL;					\
+}
+
+#define LIST_INSERT_AFTER(listelm, elm, field) {			\
+	if (((elm)->field.le_next = (listelm)->field.le_next) != NULL)	\
+		(listelm)->field.le_next->field.le_prev =		\
+		    &(elm)->field.le_next;				\
+	(listelm)->field.le_next = (elm);				\
+	(elm)->field.le_prev = &(listelm)->field.le_next;		\
+}
+
+#define LIST_INSERT_HEAD(head, elm, field) {				\
+	if (((elm)->field.le_next = (head)->lh_first) != NULL)		\
+		(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
+	(head)->lh_first = (elm);					\
+	(elm)->field.le_prev = &(head)->lh_first;			\
+}
+
+#define LIST_REMOVE(elm, field) {					\
+	if ((elm)->field.le_next != NULL)				\
+		(elm)->field.le_next->field.le_prev = 			\
+		    (elm)->field.le_prev;				\
+	*(elm)->field.le_prev = (elm)->field.le_next;			\
+}
+
+/*
+ * Tail queue definitions.
+ */
+#define TAILQ_HEAD(name, type)						\
+struct name {								\
+	struct type *tqh_first;	/* first element */			\
+	struct type **tqh_last;	/* addr of last next element */		\
+}
+
+#define TAILQ_ENTRY(type)						\
+struct {								\
+	struct type *tqe_next;	/* next element */			\
+	struct type **tqe_prev;	/* address of previous next element */	\
+}
+
+/*
+ * Tail queue functions.
+ */
+#define	TAILQ_INIT(head) {						\
+	(head)->tqh_first = NULL;					\
+	(head)->tqh_last = &(head)->tqh_first;				\
+}
+
+#define TAILQ_INSERT_HEAD(head, elm, field) {				\
+	if (((elm)->field.tqe_next = (head)->tqh_first) != NULL)	\
+		(elm)->field.tqe_next->field.tqe_prev =			\
+		    &(elm)->field.tqe_next;				\
+	else								\
+		(head)->tqh_last = &(elm)->field.tqe_next;		\
+	(head)->tqh_first = (elm);					\
+	(elm)->field.tqe_prev = &(head)->tqh_first;			\
+}
+
+#define TAILQ_INSERT_TAIL(head, elm, field) {				\
+	(elm)->field.tqe_next = NULL;					\
+	(elm)->field.tqe_prev = (head)->tqh_last;			\
+	*(head)->tqh_last = (elm);					\
+	(head)->tqh_last = &(elm)->field.tqe_next;			\
+}
+
+#define TAILQ_INSERT_AFTER(head, listelm, elm, field) {			\
+	if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
+		(elm)->field.tqe_next->field.tqe_prev = 		\
+		    &(elm)->field.tqe_next;				\
+	else								\
+		(head)->tqh_last = &(elm)->field.tqe_next;		\
+	(listelm)->field.tqe_next = (elm);				\
+	(elm)->field.tqe_prev = &(listelm)->field.tqe_next;		\
+}
+
+#define TAILQ_REMOVE(head, elm, field) {				\
+	if (((elm)->field.tqe_next) != NULL)				\
+		(elm)->field.tqe_next->field.tqe_prev = 		\
+		    (elm)->field.tqe_prev;				\
+	else								\
+		(head)->tqh_last = (elm)->field.tqe_prev;		\
+	*(elm)->field.tqe_prev = (elm)->field.tqe_next;			\
+}
+
+/*
+ * Circular queue definitions.
+ */
+#define CIRCLEQ_HEAD(name, type)					\
+struct name {								\
+	struct type *cqh_first;		/* first element */		\
+	struct type *cqh_last;		/* last element */		\
+}
+
+#define CIRCLEQ_ENTRY(type)						\
+struct {								\
+	struct type *cqe_next;		/* next element */		\
+	struct type *cqe_prev;		/* previous element */		\
+}
+
+/*
+ * Circular queue functions.
+ */
+#define	CIRCLEQ_INIT(head) {						\
+	(head)->cqh_first = (void *)(head);				\
+	(head)->cqh_last = (void *)(head);				\
+}
+
+#define CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) {		\
+	(elm)->field.cqe_next = (listelm)->field.cqe_next;		\
+	(elm)->field.cqe_prev = (listelm);				\
+	if ((listelm)->field.cqe_next == (void *)(head))		\
+		(head)->cqh_last = (elm);				\
+	else								\
+		(listelm)->field.cqe_next->field.cqe_prev = (elm);	\
+	(listelm)->field.cqe_next = (elm);				\
+}
+
+#define CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) {		\
+	(elm)->field.cqe_next = (listelm);				\
+	(elm)->field.cqe_prev = (listelm)->field.cqe_prev;		\
+	if ((listelm)->field.cqe_prev == (void *)(head))		\
+		(head)->cqh_first = (elm);				\
+	else								\
+		(listelm)->field.cqe_prev->field.cqe_next = (elm);	\
+	(listelm)->field.cqe_prev = (elm);				\
+}
+
+#define CIRCLEQ_INSERT_HEAD(head, elm, field) {				\
+	(elm)->field.cqe_next = (head)->cqh_first;			\
+	(elm)->field.cqe_prev = (void *)(head);				\
+	if ((head)->cqh_last == (void *)(head))				\
+		(head)->cqh_last = (elm);				\
+	else								\
+		(head)->cqh_first->field.cqe_prev = (elm);		\
+	(head)->cqh_first = (elm);					\
+}
+
+#define CIRCLEQ_INSERT_TAIL(head, elm, field) {				\
+	(elm)->field.cqe_next = (void *)(head);				\
+	(elm)->field.cqe_prev = (head)->cqh_last;			\
+	if ((head)->cqh_first == (void *)(head))			\
+		(head)->cqh_first = (elm);				\
+	else								\
+		(head)->cqh_last->field.cqe_next = (elm);		\
+	(head)->cqh_last = (elm);					\
+}
+
+#define	CIRCLEQ_REMOVE(head, elm, field) {				\
+	if ((elm)->field.cqe_next == (void *)(head))			\
+		(head)->cqh_last = (elm)->field.cqe_prev;		\
+	else								\
+		(elm)->field.cqe_next->field.cqe_prev =			\
+		    (elm)->field.cqe_prev;				\
+	if ((elm)->field.cqe_prev == (void *)(head))			\
+		(head)->cqh_first = (elm)->field.cqe_next;		\
+	else								\
+		(elm)->field.cqe_prev->field.cqe_next =			\
+		    (elm)->field.cqe_next;				\
+}
+#endif	/* !_QUEUE_H_ */
diff --git a/src/plugins/kdb/db2/libdb2/include/db.h b/src/plugins/kdb/db2/libdb2/include/db.h
new file mode 100644
index 0000000000..980145a3d9
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/include/db.h
@@ -0,0 +1,175 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)db.h	8.8 (Berkeley) 11/2/95
+ */
+
+#ifndef _DB_H_
+#define	_DB_H_
+
+#include <db-config.h>
+
+#include <sys/types.h>
+
+#define	RET_ERROR	-1		/* Return values. */
+#define	RET_SUCCESS	 0
+#define	RET_SPECIAL	 1
+
+/* Key/data structure -- a Data-Base Thang. */
+typedef struct {
+	void	*data;			/* data */
+	size_t	 size;			/* data length */
+} DBT;
+
+/* Routine flags. */
+#define	R_CURSOR	1		/* del, put, seq */
+#define	__R_UNUSED	2		/* UNUSED */
+#define	R_FIRST		3		/* seq */
+#define	R_IAFTER	4		/* put (RECNO) */
+#define	R_IBEFORE	5		/* put (RECNO) */
+#define	R_LAST		6		/* seq (BTREE, RECNO) */
+#define	R_NEXT		7		/* seq */
+#define	R_NOOVERWRITE	8		/* put */
+#define	R_PREV		9		/* seq (BTREE, RECNO) */
+#define	R_SETCURSOR	10		/* put (RECNO) */
+#define	R_RECNOSYNC	11		/* sync (RECNO) */
+
+typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
+
+/*
+ * !!!
+ * The following flags are included in the dbopen(3) call as part of the
+ * open(2) flags.  In order to avoid conflicts with the open flags, start
+ * at the top of the 16 or 32-bit number space and work our way down.  If
+ * the open flags were significantly expanded in the future, it could be
+ * a problem.  Wish I'd left another flags word in the dbopen call.
+ *
+ * !!!
+ * None of this stuff is implemented yet.  The only reason that it's here
+ * is so that the access methods can skip copying the key/data pair when
+ * the DB_LOCK flag isn't set.
+ */
+#if SIZEOF_INT == 4
+#define	DB_LOCK		0x20000000	/* Do locking. */
+#define	DB_SHMEM	0x40000000	/* Use shared memory. */
+#define	DB_TXN		0x80000000	/* Do transactions. */
+#else
+#define	DB_LOCK		    0x2000	/* Do locking. */
+#define	DB_SHMEM	    0x4000	/* Use shared memory. */
+#define	DB_TXN		    0x8000	/* Do transactions. */
+#endif
+
+/* deal with turning prototypes on and off */
+
+#ifndef __P
+#if defined(__STDC__) || defined(__cplusplus)
+#define	__P(protos)	protos		/* full-blown ANSI C */
+#else	/* !(__STDC__ || __cplusplus) */
+#define	__P(protos)	()		/* traditional C preprocessor */
+#endif
+#endif /* no __P from system */
+
+/* Access method description structure. */
+typedef struct __db {
+	DBTYPE type;			/* Underlying db type. */
+	int (*close)	__P((struct __db *));
+	int (*del)	__P((const struct __db *, const DBT *, u_int));
+	int (*get)	__P((const struct __db *, const DBT *, DBT *, u_int));
+	int (*put)	__P((const struct __db *, DBT *, const DBT *, u_int));
+	int (*seq)	__P((const struct __db *, DBT *, DBT *, u_int));
+	int (*sync)	__P((const struct __db *, u_int));
+	void *internal;			/* Access method private. */
+	int (*fd)	__P((const struct __db *));
+} DB;
+
+#define	BTREEMAGIC	0x053162
+#define	BTREEVERSION	3
+
+/* Structure used to pass parameters to the btree routines. */
+typedef struct {
+#define	R_DUP		0x01	/* duplicate keys */
+	u_long	flags;
+	u_int	cachesize;	/* bytes to cache */
+	int	maxkeypage;	/* maximum keys per page */
+	int	minkeypage;	/* minimum keys per page */
+	u_int	psize;		/* page size */
+	int	(*compare)	/* comparison function */
+	    __P((const DBT *, const DBT *));
+	size_t	(*prefix)	/* prefix function */
+	    __P((const DBT *, const DBT *));
+	int	lorder;		/* byte order */
+} BTREEINFO;
+
+#define	HASHMAGIC	0x061561
+#define	HASHVERSION	3
+
+/* Structure used to pass parameters to the hashing routines. */
+typedef struct {
+	u_int	bsize;		/* bucket size */
+	u_int	ffactor;	/* fill factor */
+	u_int	nelem;		/* number of elements */
+	u_int	cachesize;	/* bytes to cache */
+	u_int32_t		/* hash function */
+		(*hash) __P((const void *, size_t));
+	int	lorder;		/* byte order */
+} HASHINFO;
+
+/* Structure used to pass parameters to the record routines. */
+typedef struct {
+#define	R_FIXEDLEN	0x01	/* fixed-length records */
+#define	R_NOKEY		0x02	/* key not required */
+#define	R_SNAPSHOT	0x04	/* snapshot the input */
+	u_long	flags;
+	u_int	cachesize;	/* bytes to cache */
+	u_int	psize;		/* page size */
+	int	lorder;		/* byte order */
+	size_t	reclen;		/* record length (fixed-length records) */
+	u_char	bval;		/* delimiting byte (variable-length records */
+	char	*bfname;	/* btree file name */ 
+} RECNOINFO;
+
+#if defined(__cplusplus)
+#define	__BEGIN_DECLS	extern "C" {
+#define	__END_DECLS	};
+#else
+#define	__BEGIN_DECLS
+#define	__END_DECLS
+#endif
+
+#define dbopen	kdb2_dbopen
+#define bt_rseq		kdb2_bt_rseq /* XXX kludge */
+__BEGIN_DECLS
+DB *dbopen __P((const char *, int, int, DBTYPE, const void *));
+int	 bt_rseq(const DB*, DBT *, DBT *, void **, u_int); /* XXX kludge */
+__END_DECLS
+
+#endif /* !_DB_H_ */
diff --git a/src/plugins/kdb/db2/libdb2/libdb.exports b/src/plugins/kdb/db2/libdb2/libdb.exports
new file mode 100644
index 0000000000..5dbc2e4389
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/libdb.exports
@@ -0,0 +1,99 @@
+__default_hash
+__kdb2_add_bigpage
+__kdb2_add_ovflpage
+__kdb2_addel
+__kdb2_big_delete
+__kdb2_big_insert
+__kdb2_big_keydata
+__kdb2_big_return
+__kdb2_bt_close
+__kdb2_bt_cmp
+__kdb2_bt_defcmp
+__kdb2_bt_defpfx
+__kdb2_bt_deleaf
+__kdb2_bt_delete
+__kdb2_bt_fd
+__kdb2_bt_free
+__kdb2_bt_get
+__kdb2_bt_new
+__kdb2_bt_open
+__kdb2_bt_pgin
+__kdb2_bt_pgout
+__kdb2_bt_put
+__kdb2_bt_ret
+__kdb2_bt_search
+__kdb2_bt_seq
+__kdb2_bt_setcur
+__kdb2_bt_split
+__kdb2_bt_sync
+__kdb2_call_hash
+__kdb2_cursor_creat
+__kdb2_dbpanic
+__kdb2_delete_page
+__kdb2_delpair
+__kdb2_expand_table
+__kdb2_find_bigpair
+__kdb2_free_ovflpage
+__kdb2_get_bigkey
+__kdb2_get_item
+__kdb2_get_item_done
+__kdb2_get_item_first
+__kdb2_get_item_next
+__kdb2_get_item_reset
+__kdb2_get_page
+__kdb2_hash_open
+__kdb2_ibitmap
+__kdb2_log2
+__kdb2_new_page
+__kdb2_ovfl_delete
+__kdb2_ovfl_get
+__kdb2_ovfl_put
+__kdb2_pgin_routine
+__kdb2_pgout_routine
+__kdb2_put_page
+__kdb2_rec_close
+__kdb2_rec_delete
+__kdb2_rec_dleaf
+__kdb2_rec_fd
+__kdb2_rec_fmap
+__kdb2_rec_fpipe
+__kdb2_rec_get
+__kdb2_rec_iput
+__kdb2_rec_open
+__kdb2_rec_put
+__kdb2_rec_ret
+__kdb2_rec_search
+__kdb2_rec_seq
+__kdb2_rec_sync
+__kdb2_rec_vmap
+__kdb2_rec_vpipe
+__kdb2_split_page
+kdb2_bt_rseq
+kdb2_dbm_clearerr
+kdb2_dbm_close
+kdb2_dbm_delete
+kdb2_dbm_dirfno
+kdb2_dbm_error
+kdb2_dbm_fetch
+kdb2_dbm_firstkey
+kdb2_dbm_nextkey
+kdb2_dbm_open
+kdb2_dbm_store
+kdb2_dbminit
+kdb2_dbopen
+kdb2_delete
+kdb2_fetch
+kdb2_firstkey
+kdb2_hcreate
+kdb2_hdestroy
+kdb2_hsearch
+kdb2_mpool_close
+kdb2_mpool_delete
+kdb2_mpool_filter
+kdb2_mpool_get
+kdb2_mpool_new
+kdb2_mpool_open
+kdb2_mpool_put
+kdb2_mpool_sync
+kdb2_nextkey
+kdb2_store
diff --git a/src/plugins/kdb/db2/libdb2/man/Makefile.inc b/src/plugins/kdb/db2/libdb2/man/Makefile.inc
new file mode 100644
index 0000000000..f85cba1f81
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/Makefile.inc
@@ -0,0 +1,7 @@
+#       @(#)Makefile.inc	8.2 (Berkeley) 11/14/94
+
+.PATH: ${.CURDIR}/db/man
+
+MAN3+=	db_btree.0 db_hash.0 db_lock.0 db_log.0 db_mpool.0 db_open.0 \
+	db_recno.0
+MLINKS+=db_open.3 db.3 db_open.3 dbopen.3
diff --git a/src/plugins/kdb/db2/libdb2/man/db.man.ps b/src/plugins/kdb/db2/libdb2/man/db.man.ps
new file mode 100644
index 0000000000..23feea6e5c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db.man.ps
@@ -0,0 +1,2295 @@
+%!PS-Adobe-3.0
+%%Creator: groff version 1.08
+%%DocumentNeededResources: font Times-Roman
+%%+ font Times-Bold
+%%+ font Times-Italic
+%%DocumentSuppliedResources: procset grops 1.08 0
+%%Pages: 28
+%%PageOrder: Ascend
+%%Orientation: Portrait
+%%EndComments
+%%BeginProlog
+%%BeginResource: procset grops 1.08 0
+/setpacking where{
+pop
+currentpacking
+true setpacking
+}if
+/grops 120 dict dup begin
+/SC 32 def
+/A/show load def
+/B{0 SC 3 -1 roll widthshow}bind def
+/C{0 exch ashow}bind def
+/D{0 exch 0 SC 5 2 roll awidthshow}bind def
+/E{0 rmoveto show}bind def
+/F{0 rmoveto 0 SC 3 -1 roll widthshow}bind def
+/G{0 rmoveto 0 exch ashow}bind def
+/H{0 rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/I{0 exch rmoveto show}bind def
+/J{0 exch rmoveto 0 SC 3 -1 roll widthshow}bind def
+/K{0 exch rmoveto 0 exch ashow}bind def
+/L{0 exch rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/M{rmoveto show}bind def
+/N{rmoveto 0 SC 3 -1 roll widthshow}bind def
+/O{rmoveto 0 exch ashow}bind def
+/P{rmoveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/Q{moveto show}bind def
+/R{moveto 0 SC 3 -1 roll widthshow}bind def
+/S{moveto 0 exch ashow}bind def
+/T{moveto 0 exch 0 SC 5 2 roll awidthshow}bind def
+/SF{
+findfont exch
+[exch dup 0 exch 0 exch neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/MF{
+findfont
+[5 2 roll
+0 3 1 roll 
+neg 0 0]makefont
+dup setfont
+[exch/setfont cvx]cvx bind def
+}bind def
+/level0 0 def
+/RES 0 def
+/PL 0 def
+/LS 0 def
+/PLG{
+gsave newpath clippath pathbbox grestore
+exch pop add exch pop
+}bind def
+/BP{
+/level0 save def
+1 setlinecap
+1 setlinejoin
+72 RES div dup scale
+LS{
+90 rotate
+}{
+0 PL translate
+}ifelse
+1 -1 scale
+}bind def
+/EP{
+level0 restore
+showpage
+}bind def
+/DA{
+newpath arcn stroke
+}bind def
+/SN{
+transform
+.25 sub exch .25 sub exch
+round .25 add exch round .25 add exch
+itransform
+}bind def
+/DL{
+SN
+moveto
+SN
+lineto stroke
+}bind def
+/DC{
+newpath 0 360 arc closepath
+}bind def
+/TM matrix def
+/DE{
+TM currentmatrix pop
+translate scale newpath 0 0 .5 0 360 arc closepath
+TM setmatrix
+}bind def
+/RC/rcurveto load def
+/RL/rlineto load def
+/ST/stroke load def
+/MT/moveto load def
+/CL/closepath load def
+/FL{
+currentgray exch setgray fill setgray
+}bind def
+/BL/fill load def
+/LW/setlinewidth load def
+/RE{
+findfont
+dup maxlength 1 index/FontName known not{1 add}if dict begin
+{
+1 index/FID ne{def}{pop pop}ifelse
+}forall
+/Encoding exch def
+dup/FontName exch def
+currentdict end definefont pop
+}bind def
+/DEFS 0 def
+/EBEGIN{
+moveto
+DEFS begin
+}bind def
+/EEND/end load def
+/CNT 0 def
+/level1 0 def
+/PBEGIN{
+/level1 save def
+translate
+div 3 1 roll div exch scale
+neg exch neg exch translate
+0 setgray
+0 setlinecap
+1 setlinewidth
+0 setlinejoin
+10 setmiterlimit
+[]0 setdash
+/setstrokeadjust where{
+pop
+false setstrokeadjust
+}if
+/setoverprint where{
+pop
+false setoverprint
+}if
+newpath
+/CNT countdictstack def
+userdict begin
+/showpage{}def
+}bind def
+/PEND{
+clear
+countdictstack CNT sub{end}repeat
+level1 restore
+}bind def
+end def
+/setpacking where{
+pop
+setpacking
+}if
+%%EndResource
+%%IncludeResource: font Times-Roman
+%%IncludeResource: font Times-Bold
+%%IncludeResource: font Times-Italic
+grops begin/DEFS 1 dict def DEFS begin/u{.001 mul}bind def end/RES 72 def/PL
+792 def/LS false def/ENC0[/asciicircum/asciitilde/Scaron/Zcaron/scaron/zcaron
+/Ydieresis/trademark/quotesingle/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef
+/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/space
+/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft
+/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four
+/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C
+/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash
+/bracketright/circumflex/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q
+/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/tilde/.notdef/quotesinglbase
+/guillemotleft/guillemotright/bullet/florin/fraction/perthousand/dagger
+/daggerdbl/endash/emdash/ff/fi/fl/ffi/ffl/dotlessi/dotlessj/grave/hungarumlaut
+/dotaccent/breve/caron/ring/ogonek/quotedblleft/quotedblright/oe/lslash
+/quotedblbase/OE/Lslash/.notdef/exclamdown/cent/sterling/currency/yen/brokenbar
+/section/dieresis/copyright/ordfeminine/guilsinglleft/logicalnot/minus
+/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu
+/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guilsinglright
+/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde
+/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute
+/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis
+/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls
+/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute
+/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve
+/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex
+/udieresis/yacute/thorn/ydieresis]def/Times-Italic@0 ENC0/Times-Italic RE
+/Times-Bold@0 ENC0/Times-Bold RE/Times-Roman@0 ENC0/Times-Roman RE
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 113.45(DB_BTREE\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 113.45(anual DB_BTREE\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)
+72 84 S(ME).18 E F0(db_btree \255 btree database access method)108 96 Q F1
+(DESCRIPTION)72 112.8 Q F0 .486(The DB library is a f)108 124.8 R .485
+(amily of groups of functions that pro)-.1 F .485
+(vides a modular programming interf)-.15 F .485(ace to trans-)-.1 F .822
+(actions and record-oriented \214le access.)108 136.8 R .822
+(The library includes support for transaction, locking, logging and)5.822 F
+.258(\214le b)108 148.8 R(uf)-.2 E .258(fering functionality)-.25 F 2.758(,a)
+-.65 G 2.758(sw)223.214 148.8 S .258(ell as v)237.082 148.8 R .258(arious inde)
+-.25 F -.15(xe)-.15 G 2.758(da).15 G .258(ccess methods.)331.434 148.8 R(Man)
+5.258 E 2.758(yo)-.15 G 2.758(ft)427.878 148.8 S .258
+(he functional groups \(e.g.)436.746 148.8 R .528(the memory pool functions\) \
+are useful independently of the rest of the DB functions, although some func-)
+108 160.8 R .306(tional groups are e)108 172.8 R .306
+(xplicitly based on other functional groups \(e.g.)-.15 F .306
+(transactions and logging\).)5.306 F -.15(Fo)5.306 G 2.806(rag).15 G(eneral)
+515.57 172.8 Q .245(description of transactions, see)108 184.8 R/F2 10
+/Times-Italic@0 SF(db_txn)2.745 E F0 2.745(\(3\). F).24 F .245
+(or a general description of the access methods, see)-.15 F F2(db_open)2.745 E
+F0(\(3\)).24 E .308(and then the indi)108 196.8 R .308
+(vidual access method manual pages:)-.25 F F2(db_btr)2.807 E(ee)-.37 E F0
+(\(3\),).18 E F2(db_hash)2.807 E F0(\(3\),).28 E F2(db_lo)2.807 E(g)-.1 E F0
+.307(\(3\) and).22 F F2(db_r)2.807 E(ecno)-.37 E F0(\(3\).).18 E -.15(Fo)108
+208.8 S 3.635(rag).15 G 1.135(eneral description of the lock manager)138.45
+208.8 R 3.635(,s)-.4 G(ee)307.32 208.8 Q F2(db_loc)3.635 E(k)-.2 E F0 3.635
+(\(3\). F).67 F 1.135(or a general description of the memory)-.15 F
+(pool manager)108 220.8 Q 2.5(,s)-.4 G(ee)171.2 220.8 Q F2(db_mpool)2.5 E F0
+(\(3\).).51 E
+(This manual page describes speci\214c details of the btree access method.)108
+237.6 Q 1.518(The btree data structure is a sorted, balanced tree structure st\
+oring associated k)108 254.4 R -.15(ey)-.1 G 1.517(/data pairs.).15 F
+(Searches,)6.517 E .598(insertions, and deletions in the btree will all comple\
+te in O lg base N where base is the a)108 266.4 R -.15(ve)-.2 G .598
+(rage \214ll f).15 F(actor)-.1 E(.)-.55 E .306
+(Often, inserting ordered data into btrees results in a lo)108 278.4 R 2.806
+<778c>-.25 G .305(ll f)341.61 278.4 R(actor)-.1 E 5.305(.T)-.55 G .305
+(his implementation has been modi\214ed)386.56 278.4 R(to mak)108 290.4 Q 2.5
+(eo)-.1 G(rdered insertion the best case, resulting in a much better than norm\
+al page \214ll f)147.34 290.4 Q(actor)-.1 E(.)-.55 E F1 -.495(AC)72 307.2 S
+(CESS METHOD SPECIFIC INFORMA).495 E(TION)-.855 E F0 .175
+(The btree access method speci\214c data structure pro)108 319.2 R .176
+(vided to)-.15 F F2(db_open)2.676 E F0 .176(is typedef)2.676 F 1.176 -.5('d a)
+.55 H .176(nd named BTREEINFO.).5 F 2.638(AB)108 331.2 S .138
+(TREEINFO structure has at least the follo)124.528 331.2 R .137
+(wing \214elds, which may be initialized before calling)-.25 F F2(db_open)2.637
+E F0(:).24 E(u_int cachesize;)108 348 Q 3.743(As)133 360 S 1.243
+(uggested maximum size \(in bytes\) of the memory cache.)147.853 360 R 1.243
+(This v)6.243 F 1.243(alue is)-.25 F/F3 10/Times-Bold@0 SF(only)3.743 E F0
+(advisory)3.743 E 3.744(,a)-.65 G 1.244(nd the)514.036 360 R .017
+(access method will allocate more memory rather than f)133 372 R 2.517
+(ail. Since)-.1 F -2.15 -.25(ev e)2.517 H .016(ry search e).25 F .016
+(xamines the root page)-.15 F 1.319
+(of the tree, caching the most recently used pages substantially impro)133 384
+R -.15(ve)-.15 G 3.82(sa).15 G 1.32(ccess time.)441.05 384 R 1.32(In addition,)
+6.32 F(ph)133 396 Q .911(ysical writes are delayed as long as possible, so a m\
+oderate cache can reduce the number of I/O)-.05 F 1.497
+(operations signi\214cantly)133 408 R 6.497(.O)-.65 G -.15(bv)243.674 408 S
+(iously).15 E 3.997(,u)-.65 G 1.497(sing a cache increases \(b)288.821 408 R
+1.498(ut only increases\) the lik)-.2 F 1.498(elihood of)-.1 F .336(corruption\
+ or lost data if the system crashes while a tree is being modi\214ed.)133 420 R
+(If)5.336 E F2(cac)2.836 E(hesize)-.15 E F0 .335(is 0 \(no size)2.835 F
+(is speci\214ed\) a def)133 432 Q(ault cache is used.)-.1 E
+(int \(*compare\)\(const DBT *, const DBT *\);)108 448.8 Q .194
+(Compare is the k)133 460.8 R .494 -.15(ey c)-.1 H .194(omparison function.).15
+F .194(It must return an inte)5.194 F .194
+(ger less than, equal to, or greater than)-.15 F .656(zero if the \214rst k)133
+472.8 R .956 -.15(ey a)-.1 H -.18(rg).15 G .656
+(ument is considered to be respecti).18 F -.15(ve)-.25 G .655
+(ly less than, equal to, or greater than the).15 F .798(second k)133 484.8 R
+1.098 -.15(ey a)-.1 H -.18(rg).15 G 3.298(ument. The).18 F .798
+(same comparison function must be used on a gi)3.298 F -.15(ve)-.25 G 3.298(nt)
+.15 G .799(ree e)462.774 484.8 R -.15(ve)-.25 G .799(ry time it is).15 F 2.79
+(opened. If)133 496.8 R F2(compar)2.79 E(e)-.37 E F0 .29
+(is NULL \(no comparison function is speci\214ed\), the k)2.79 F -.15(ey)-.1 G
+2.79(sa).15 G .29(re compared le)451.08 496.8 R(xically)-.15 E(,)-.65 E
+(with shorter k)133 508.8 Q -.15(ey)-.1 G 2.5(sc).15 G
+(onsidered less than longer k)208.57 508.8 Q -.15(ey)-.1 G(s.).15 E
+(u_long \215ags;)108 525.6 Q(The \215ag v)133 537.6 Q(alue is speci\214ed by)
+-.25 E F2(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)302.2 537.6 S
+(he follo)310.81 537.6 Q(wing v)-.25 E(alues:)-.25 E(R_DUP)133 554.4 Q .354
+(Permit duplicate k)158 566.4 R -.15(ey)-.1 G 2.854(si).15 G 2.854(nt)250.752
+566.4 S .355(he tree, i.e. permit insertion if the k)261.386 566.4 R .655 -.15
+(ey t)-.1 H 2.855(ob).15 G 2.855(ei)432.64 566.4 S .355(nserted already e)
+442.715 566.4 R .355(xists in)-.15 F 1.65(the tree.)158 578.4 R 1.65(The def)
+6.65 F 1.65(ault beha)-.1 F(vior)-.2 E 4.149(,a)-.4 G 4.149(sd)295.509 578.4 S
+1.649(escribed in)308.548 578.4 R F2(db_open)4.149 E F0 1.649(\(3\), is to o)
+.24 F -.15(ve)-.15 G 1.649(rwrite a matching k).15 F -.15(ey)-.1 G .783
+(when inserting a ne)158 590.4 R 3.283(wk)-.25 G 1.083 -.15(ey o)253.542 590.4
+T 3.283(rt).15 G 3.283(of)280.508 590.4 S .783(ail if the R_NOO)292.021 590.4 R
+(VER)-.5 E .784(WRITE \215ag is speci\214ed.)-.55 F .784(The R_DUP)5.784 F .129
+(\215ag is o)158 602.4 R -.15(ve)-.15 G .129(rridden by the R_NOO).15 F(VER)-.5
+E .128(WRITE \215ag, and if the R_NOO)-.55 F(VER)-.5 E .128
+(WRITE \215ag is spec-)-.55 F(i\214ed, attempts to insert duplicate k)158 614.4
+Q -.15(ey)-.1 G 2.5(si).15 G(nto the tree will f)314.69 614.4 Q(ail.)-.1 E .835
+(If the database contains duplicate k)158 631.2 R -.15(ey)-.1 G .835
+(s, the order of retrie).15 F -.25(va)-.25 G 3.335(lo).25 G 3.336(fk)414.7
+631.2 S -.15(ey)426.266 631.2 S .836(/data pairs is unde\214ned if).15 F(the)
+158 643.2 Q F2 -.1(ge)3.003 G(t).1 E F0 .503(function is used, ho)3.003 F(we)
+-.25 E -.15(ve)-.25 G -.4(r,).15 G F2(seq)3.403 E F0 .502
+(function calls with the R_CURSOR \215ag set will al)3.003 F -.1(wa)-.1 G(ys).1
+E(return the logical `)158 655.2 Q(`\214rst')-.74 E 2.5('o)-.74 G 2.5(fa)263.72
+655.2 S .3 -.15(ny g)273.99 655.2 T(roup of duplicate k).15 E -.15(ey)-.1 G(s.)
+.15 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315
+(ution August)-.2 F(1, 1995)2.5 E(1)535 732 Q EP
+%%Page: 2 2
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 113.45(DB_BTREE\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 113.45(anual DB_BTREE\(3\))340.17 48 R(int lorder;)108 84 Q .65
+(The byte order for inte)133 96 R .65(gers in the stored database metadata.)
+-.15 F .65(The number should represent the order)5.65 F .749(as an inte)133 108
+R .749(ger; for e)-.15 F .749(xample, big endian order w)-.15 F .749
+(ould be the number 4,321.)-.1 F(If)5.749 E/F1 10/Times-Italic@0 SF(lor)3.249 E
+(der)-.37 E F0 .749(is 0 \(no order is)3.249 F
+(speci\214ed\) the current host order is used.)133 120 Q(int maxk)108 136.8 Q
+-.15(ey)-.1 G(page;).15 E .073(The maximum number of k)133 148.8 R -.15(ey)-.1
+G 2.573(sw).15 G .073(hich will be stored on an)266.155 148.8 R 2.574(ys)-.15 G
+.074(ingle page.)376.436 148.8 R .074(This functionality is not cur)5.074 F(-)
+-.2 E(rently implemented.)133 160.8 Q(int mink)108 177.6 Q -.15(ey)-.1 G(page;)
+.15 E .532(The minimum number of k)133 189.6 R -.15(ey)-.1 G 3.031(sw).15 G
+.531(hich will be stored on an)266.787 189.6 R 3.031(ys)-.15 G .531
+(ingle page.)379.813 189.6 R .531(This v)5.531 F .531(alue is used to deter)
+-.25 F(-)-.2 E .558(mine which k)133 201.6 R -.15(ey)-.1 G 3.058(sw).15 G .558
+(ill be stored on o)211.914 201.6 R -.15(ve)-.15 G(r\215o).15 E 3.058(wp)-.25 G
+.558(ages, i.e. if a k)319.424 201.6 R .859 -.15(ey o)-.1 H 3.059(rd).15 G .559
+(ata item is longer than the page-)408.336 201.6 R .063(size di)133 213.6 R
+.063(vided by the mink)-.25 F -.15(ey)-.1 G .063(page v).15 F .063
+(alue, it will be stored on o)-.25 F -.15(ve)-.15 G(r\215o).15 E 2.563(wp)-.25
+G .062(ages instead of in the page itself.)408.816 213.6 R(If)133 225.6 Q F1
+(mink)2.5 E -.3(ey)-.1 G(pa).3 E -.1(ge)-.1 G F0(is 0 \(no minimum number of k)
+2.6 E -.15(ey)-.1 G 2.5(si).15 G 2.5(ss)332.96 225.6 S(peci\214ed\) a v)343.24
+225.6 Q(alue of 2 is used.)-.25 E
+(size_t \(*pre\214x\)\(const DBT *, const DBT *\);)108 242.4 Q .691
+(Pre\214x is the pre\214x comparison function.)133 254.4 R .692
+(If speci\214ed, this function must return the number of bytes)5.691 F .195
+(of the second k)133 266.4 R .495 -.15(ey a)-.1 H -.18(rg).15 G .195
+(ument which are necessary to determine that it is greater than the \214rst k)
+.18 F .495 -.15(ey a)-.1 H -.18(rg).15 G(u-).18 E 2.994(ment. If)133 278.4 R
+.494(the k)2.994 F -.15(ey)-.1 G 2.994(sa).15 G .494(re equal, the k)211.376
+278.4 R .794 -.15(ey l)-.1 H .494(ength should be returned.).15 F .494
+(Note, the usefulness of this function)5.494 F .327(is v)133 290.4 R .327
+(ery data dependent, b)-.15 F .326(ut, in some data sets can produce signi\214\
+cantly reduced tree sizes and search)-.2 F 2.789(times. If)133 302.4 R F1(pr)
+2.789 E(e\214x)-.37 E F0 .289(is NULL \(no pre\214x function is speci\214ed\),)
+2.789 F/F2 10/Times-Bold@0 SF(and)2.789 E F0 .29
+(no comparison function is speci\214ed, a)2.79 F(def)133 314.4 Q .902(ault le)
+-.1 F .902(xical comparison function is used.)-.15 F(If)5.901 E F1(pr)3.401 E
+(e\214x)-.37 E F0 .901(is NULL and a comparison function is speci-)3.401 F
+(\214ed, no pre\214x comparison is done.)133 326.4 Q(u_int psize;)108 343.2 Q
+-.15(Pa)133 355.2 S .118
+(ge size is the size \(in bytes\) of the pages used for nodes in the tree.).15
+F .119(The minimum page size is 512)5.119 F .377
+(bytes and the maximum page size is 64K.)133 367.2 R(If)5.376 E F1(psize)2.876
+E F0 .376(is 0 \(no page size is speci\214ed\) a page size is cho-)2.876 F
+(sen based on the underlying \214le system I/O block size.)133 379.2 Q .79
+(If the \214le already e)108 396 R .79(xists \(and the O_TR)-.15 F .79
+(UNC \215ag is not speci\214ed\), the v)-.4 F .79
+(alues speci\214ed for the parameters)-.25 F
+(\215ags, lorder and psize are ignored in f)108 408 Q -.2(avo)-.1 G 2.5(ro).2 G
+2.5(ft)284.4 408 S(he v)293.01 408 Q(alues used when the tree w)-.25 E
+(as created.)-.1 E/F3 9/Times-Bold@0 SF(DB OPERA)72 424.8 Q(TIONS)-.855 E F0
+1.037(The functions returned by)108 436.8 R F1(db_open)3.537 E F0 1.036
+(for the btree access method are as described in)3.536 F F1(db_open)3.536 E F0
+1.036(\(3\), with the).24 F(follo)108 448.8 Q(wing e)-.25 E
+(xceptions and additions:)-.15 E 5.28(type The)108 465.6 R(type is DB_BTREE.)
+2.5 E 10.28(del Space)108 482.4 R 1.681(freed up by deleting k)4.181 F -.15(ey)
+-.1 G 1.681(/data pairs from the tree is ne).15 F -.15(ve)-.25 G 4.181(rr).15 G
+1.682(eclaimed, although it is reused)411.342 482.4 R .734(where possible.)133
+494.4 R .734(This means that the btree storage structure is gro)5.734 F(w-only)
+-.25 E 5.734(.T)-.65 G .734(he only solutions are to)443.734 494.4 R -.2(avo)
+133 506.4 S(id e).2 E(xcessi)-.15 E .3 -.15(ve d)-.25 H
+(eletions, or to create a fresh tree periodically from a scan of an e).15 E
+(xisting one.)-.15 E 9.72(put The)108 523.2 R F1(put)2.5 E F0(function tak)2.5
+E(es the follo)-.1 E(wing additional \215ags:)-.25 E(R_SETCURSOR)133 540 Q
+(Store the k)158 552 Q -.15(ey)-.1 G(/data pair).15 E 2.5(,s)-.4 G
+(etting or initializing the position of the cursor to reference it.)256.5 552 Q
+9.17(seq F)108 568.8 R(orw)-.15 E
+(ard sequential scans of a tree are from the least k)-.1 E .3 -.15(ey t)-.1 H
+2.5(ot).15 G(he greatest.)373.55 568.8 Q .892(The returned k)133 585.6 R 1.192
+-.15(ey f)-.1 H .892(or the).15 F F1(seq)3.393 E F0 .893
+(function is not necessarily an e)3.393 F .893
+(xact match for the speci\214ed k)-.15 F 1.193 -.15(ey i)-.1 H 3.393(nt).15 G
+(he)530.56 585.6 Q .5(btree access method.)133 597.6 R .5(The returned k)5.5 F
+.8 -.15(ey i)-.1 H 3(st).15 G .499(he smallest k)307.04 597.6 R .799 -.15(ey g)
+-.1 H .499(reater than or equal to the speci\214ed k).15 F -.15(ey)-.1 G(,)-.5
+E(permitting partial k)133 609.6 Q .3 -.15(ey m)-.1 H
+(atches and range searches.).15 E(The)133 626.4 Q F1(seq)2.5 E F0(function tak)
+2.5 E(es the follo)-.1 E(wing additional \215ags:)-.25 E(R_LAST)133 643.2 Q .04
+(The last k)158 655.2 R -.15(ey)-.1 G .04(/data pair of the database is return\
+ed, and the cursor is set or initialized to reference).15 F(it.)158 667.2 Q
+(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315
+(ution August)-.2 F(1, 1995)2.5 E(2)535 732 Q EP
+%%Page: 3 3
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 113.45(DB_BTREE\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 113.45(anual DB_BTREE\(3\))340.17 48 R(R_PREV)133 84 Q(Retrie)158 96
+Q .59 -.15(ve t)-.25 H .29(he k).15 F -.15(ey)-.1 G .29
+(/data pair immediately before the cursor).15 F 5.29(.I)-.55 G 2.79(ft)395.73
+96 S .29(he cursor is not yet set, this is the)404.63 96 R
+(same as the R_LAST \215ag.)158 108 Q/F1 9/Times-Bold@0 SF(ERR)72 124.8 Q(ORS)
+-.27 E F0(The)108 136.8 Q/F2 10/Times-Italic@0 SF(btr)2.541 E(ee)-.37 E F0 .041
+(access method functions may f)2.541 F .041(ail and set)-.1 F F2(errno)2.541 E
+F0 .041(for an)2.541 F 2.541(yo)-.15 G 2.541(ft)376.152 136.8 S .041
+(he errors speci\214ed for the library func-)384.803 136.8 R(tion)108 148.8 Q
+F2(db_open)2.5 E F0(\(3\).).24 E F1(SEE ALSO)72 165.6 Q F2(db_hash)108 177.6 Q
+F0(\(3\),).28 E F2(db_loc)2.5 E(k)-.2 E F0(\(3\),).67 E F2(db_lo)2.5 E(g)-.1 E
+F0(\(3\),).22 E F2(db_mpool)2.5 E F0(\(3\),).51 E F2(db_open)2.5 E F0(\(3\),)
+.24 E F2(db_r)2.5 E(ecno)-.37 E F0(\(3\),).18 E F2(db_txn)2.5 E F0(\(3\)).24 E
+F2(The Ubiquitous B-tr)108 201.6 Q(ee)-.37 E F0 2.5(,D).18 G(ouglas Comer)
+209.47 201.6 Q 2.5(,A)-.4 G(CM Comput. Surv)276.72 201.6 Q 2.5(.1)-.65 G
+(1, 2 \(June 1979\), 121-138.)360.25 201.6 Q F2(Pr)108 225.6 Q 1.588
+(e\214x B-tr)-.37 F(ees)-.37 E F0 4.088(,B).27 G 1.587(ayer and Unterauer)
+177.636 225.6 R 4.087(,A)-.4 G 1.587(CM T)270.447 225.6 R 1.587
+(ransactions on Database Systems, V)-.35 F 1.587(ol. 2, 1 \(March 1977\),)-1.29
+F(11-26.)108 237.6 Q F2(The Art of Computer Pr)108 261.6 Q -.1(og)-.45 G -.15
+(ra).1 G(mming V).15 E(ol. 3: Sorting and Sear)-1.11 E -.15(ch)-.37 G(ing).15 E
+F0 2.5(,D).22 G(.E. Knuth, 1968, pp 471-480.)382 261.6 Q(4.4 Berk)72 732 Q(ele)
+-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E
+(3)535 732 Q EP
+%%Page: 1 4
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 117.9(DB_HASH\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 117.9(anual DB_HASH\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72
+84 S(ME).18 E F0(db_hash \255 hash database access method)108 96 Q F1
+(DESCRIPTION)72 112.8 Q F0 .485(The DB library is a f)108 124.8 R .485
+(amily of groups of functions that pro)-.1 F .486
+(vides a modular programming interf)-.15 F .486(ace to trans-)-.1 F .823
+(actions and record-oriented \214le access.)108 136.8 R .822
+(The library includes support for transaction, locking, logging and)5.822 F
+.258(\214le b)108 148.8 R(uf)-.2 E .258(fering functionality)-.25 F 2.758(,a)
+-.65 G 2.758(sw)223.214 148.8 S .258(ell as v)237.082 148.8 R .258(arious inde)
+-.25 F -.15(xe)-.15 G 2.758(da).15 G .258(ccess methods.)331.434 148.8 R(Man)
+5.258 E 2.758(yo)-.15 G 2.758(ft)427.878 148.8 S .258
+(he functional groups \(e.g.)436.746 148.8 R .528(the memory pool functions\) \
+are useful independently of the rest of the DB functions, although some func-)
+108 160.8 R .306(tional groups are e)108 172.8 R .306
+(xplicitly based on other functional groups \(e.g.)-.15 F .306
+(transactions and logging\).)5.306 F -.15(Fo)5.306 G 2.806(rag).15 G(eneral)
+515.57 172.8 Q .245(description of transactions, see)108 184.8 R/F2 10
+/Times-Italic@0 SF(db_txn)2.745 E F0 2.745(\(3\). F).24 F .245
+(or a general description of the access methods, see)-.15 F F2(db_open)2.745 E
+F0(\(3\)).24 E .307(and then the indi)108 196.8 R .307
+(vidual access method manual pages:)-.25 F F2(db_btr)2.808 E(ee)-.37 E F0
+(\(3\),).18 E F2(db_hash)2.808 E F0(\(3\),).28 E F2(db_lo)2.808 E(g)-.1 E F0
+.308(\(3\) and).22 F F2(db_r)2.808 E(ecno)-.37 E F0(\(3\).).18 E -.15(Fo)108
+208.8 S 3.635(rag).15 G 1.135(eneral description of the lock manager)138.45
+208.8 R 3.635(,s)-.4 G(ee)307.32 208.8 Q F2(db_loc)3.635 E(k)-.2 E F0 3.635
+(\(3\). F).67 F 1.135(or a general description of the memory)-.15 F
+(pool manager)108 220.8 Q 2.5(,s)-.4 G(ee)171.2 220.8 Q F2(db_mpool)2.5 E F0
+(\(3\).).51 E
+(This manual page describes speci\214c details of the hashing access method.)
+108 237.6 Q .59(The hash data structure is an e)108 254.4 R .591
+(xtensible, dynamic hashing scheme.)-.15 F(Backw)5.591 E .591
+(ard compatible interf)-.1 F .591(aces to the)-.1 F .209
+(functions described in)108 266.4 R F2(dbm)2.709 E F0 .209(\(3\), and).32 F F2
+(ndbm)2.709 E F0 .209(\(3\) are pro).32 F .209(vided, ho)-.15 F(we)-.25 E -.15
+(ve)-.25 G 2.708(rt).15 G .208(hese interf)382.71 266.4 R .208
+(aces are not compatible with)-.1 F(pre)108 278.4 Q(vious \214le formats.)-.25
+E F1 -.495(AC)72 295.2 S(CESS METHOD SPECIFIC INFORMA).495 E(TION)-.855 E F0
+.612(The hash access method speci\214c data structure pro)108 307.2 R .612
+(vided to)-.15 F F2(db_open)3.112 E F0 .612(is typedef)3.112 F 1.612 -.5('d a)
+.55 H .613(nd named HASHINFO.).5 F 2.5(AH)108 319.2 S
+(ASHINFO structure has at least the follo)124.94 319.2 Q
+(wing \214elds, which may be initialized before calling)-.25 E F2(db_open)2.5 E
+F0(:).24 E(u_int bsize;)108 336 Q F2(Bsize)133 348 Q F0 2.041
+(de\214nes the hash table b)4.541 F(uck)-.2 E 2.041(et size, and is, by def)-.1
+F 2.04(ault, 256 bytes.)-.1 F 2.04(It may be preferable to)7.04 F
+(increase the page size for disk-resident tables and tables with lar)133 360 Q
+(ge data items.)-.18 E(u_int cachesize;)108 376.8 Q 3.846(As)133 388.8 S 1.347
+(uggested maximum size, in bytes, of the memory cache.)147.956 388.8 R 1.347
+(This v)6.347 F 1.347(alue is)-.25 F/F3 10/Times-Bold@0 SF(only)3.847 E F0
+(advisory)3.847 E 3.847(,a)-.65 G 1.347(nd the)513.933 388.8 R
+(access method will allocate more memory rather than f)133 400.8 Q(ail.)-.1 E
+(u_int f)108 417.6 Q -.1(fa)-.25 G(ctor;).1 E F2(Ffactor)133 429.6 Q F0 1.17
+(indicates a desired density within the hash table.)3.67 F 1.169
+(It is an approximation of the number of)6.169 F -.1(ke)133 441.6 S 1.162
+(ys allo)-.05 F 1.162(wed to accumulate in an)-.25 F 3.662(yo)-.15 G 1.162
+(ne b)284.852 441.6 R(uck)-.2 E 1.162(et, determining when the hash table gro)
+-.1 F 1.162(ws or shrinks.)-.25 F(The def)133 453.6 Q(ault v)-.1 E(alue is 8.)
+-.25 E(u_int32_t \(*hash\)\(const v)108 470.4 Q(oid *, size_t\);)-.2 E F2(Hash)
+133 482.4 Q F0 .788(is a user de\214ned hash function.)3.288 F .787
+(Since no hash function performs equally well on all possible)5.788 F .017
+(data, the user may \214nd that the b)133 494.4 R .018
+(uilt-in hash function does poorly on a particular data set.)-.2 F .018
+(User speci-)5.018 F 1.154(\214ed hash functions must tak)133 506.4 R 3.654(et)
+-.1 G 1.354 -.1(wo a)260.61 506.4 T -.18(rg).1 G 1.154
+(uments \(a pointer to a byte string and a length\) and return a).18 F
+(32-bit quantity to be used as the hash v)133 518.4 Q(alue.)-.25 E .665
+(If a hash function is speci\214ed,)133 535.2 R F2(hash_open)3.165 E F0 .666
+(will attempt to determine if the hash function speci\214ed is)3.166 F
+(the same as the one with which the database w)133 547.2 Q
+(as created, and will f)-.1 E(ail if it is not.)-.1 E(int lorder;)108 564 Q .65
+(The byte order for inte)133 576 R .65(gers in the stored database metadata.)
+-.15 F .65(The number should represent the order)5.65 F .748(as an inte)133 588
+R .749(ger; for e)-.15 F .749(xample, big endian order w)-.15 F .749
+(ould be the number 4,321.)-.1 F(If)5.749 E F2(lor)3.249 E(der)-.37 E F0 .749
+(is 0 \(no order is)3.249 F .456(speci\214ed\) the current host order is used.)
+133 600 R .456(If the)5.456 F .456(\214le already e)5.456 F .456
+(xists, the speci\214ed v)-.15 F .455(alue is ignored and)-.25 F(the v)133 612
+Q(alue speci\214ed when the tree w)-.25 E(as created is used.)-.1 E
+(u_int nelem;)108 628.8 Q F2(Nelem)133 640.8 Q F0 1.225
+(is an estimate of the \214nal size of the hash table.)3.724 F 1.225
+(If not set or set too lo)6.225 F 2.525 -.65(w, h)-.25 H 1.225(ash tables will)
+.65 F -.15(ex)133 652.8 S 1.294(pand gracefully as k).15 F -.15(ey)-.1 G 3.794
+(sa).15 G 1.294(re entered, although a slight performance de)248.296 652.8 R
+1.293(gradation may be noticed.)-.15 F(The def)133 664.8 Q(ault v)-.1 E
+(alue is 1.)-.25 E .79(If the \214le already e)108 681.6 R .79
+(xists \(and the O_TR)-.15 F .79(UNC \215ag is not speci\214ed\), the v)-.4 F
+.79(alues speci\214ed for the parameters)-.25 F(bsize, f)108 693.6 Q -.1(fa)
+-.25 G(ctor).1 E 2.5(,l)-.4 G(order and nelem are ignored and the v)167.23
+693.6 Q(alues speci\214ed when the tree w)-.25 E(as created are used.)-.1 E
+(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315
+(ution August)-.2 F(1, 1995)2.5 E(1)535 732 Q EP
+%%Page: 2 5
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 117.9(DB_HASH\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 117.9(anual DB_HASH\(3\))340.17 48 R/F1 9/Times-Bold@0 SF(DB OPERA)
+72 84 Q(TIONS)-.855 E F0(The functions returned by)108 96 Q/F2 10
+/Times-Italic@0 SF(db_open)2.5 E F0
+(for the hash access method are as described in)2.5 E F2(db_open)2.5 E F0
+(\(3\).).24 E F1(ERR)72 112.8 Q(ORS)-.27 E F0(The)108 124.8 Q F2(hash)2.609 E
+F0 .109(access method functions may f)2.609 F .109(ail and set)-.1 F F2(errno)
+2.609 E F0 .109(for an)2.609 F 2.609(yo)-.15 G 2.609(ft)375.678 124.8 S .109
+(he errors speci\214ed for the library func-)384.397 124.8 R(tion)108 136.8 Q
+F2(db_open)2.5 E F0(\(3\).).24 E F1(SEE ALSO)72 153.6 Q F2(db_btr)108 165.6 Q
+(ee)-.37 E F0(\(3\),).18 E F2(db_loc)2.5 E(k)-.2 E F0(\(3\),).67 E F2(db_lo)2.5
+E(g)-.1 E F0(\(3\),).22 E F2(db_mpool)2.5 E F0(\(3\),).51 E F2(db_open)2.5 E F0
+(\(3\),).24 E F2(db_r)2.5 E(ecno)-.37 E F0(\(3\),).18 E F2(db_txn)2.5 E F0
+(\(3\)).24 E F2(Dynamic Hash T)108 189.6 Q(ables)-.92 E F0 2.5(,P).27 G(er)
+206.79 189.6 Q(-Ak)-.2 E 2.5(eL)-.1 G(arson, Communications of the A)242.86
+189.6 Q(CM, April 1988.)-.4 E F2 2.5(AN)108 213.6 S .3 -.15(ew H)123.28 213.6 T
+(ash P).15 E(ac)-.8 E(ka)-.2 E .2 -.1(ge f)-.1 H(or UNIX).1 E F0 2.5(,M).94 G
+(ar)248.41 213.6 Q(go Seltzer)-.18 E 2.5(,U)-.4 G(SENIX Proceedings, W)308.09
+213.6 Q(inter 1991.)-.4 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)
+132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(2)535 732 Q EP
+%%Page: 1 6
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 117.9(DB_LOCK\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 117.9(anual DB_LOCK\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72
+84 S(ME).18 E F0(db_lock \255 general purpose lock manager)108 96 Q F1
+(SYNOPSIS)72 112.8 Q/F2 10/Times-Bold@0 SF(#include <db_lock.h>)108 124.8 Q
+(int)108 148.8 Q(lock_cr)108 160.8 Q(eate\(const char *path, mode_t mode,)-.18
+E(int lock_modes, const int8_t con\215icts[][], u_int maxlocks\);)158 172.8 Q
+(LOCK_T)108 196.8 Q(ABLE_T *)-.9 E(lock_open\(const char *path\);)108 208.8 Q
+(int)108 232.8 Q(lock_v)108 244.8 Q(ec\(LOCK_T)-.1 E(ABLE_T *lt, DBT *lock)-.9
+E(er)-.1 E 2.5(,s)-.92 G(truct timespec *timeout,)308.21 244.8 Q
+(LOCK_REQ_T list[], int nlist, LOCK_REQ_T **elistp, DBT *con\215ict\);)158
+256.8 Q(int)108 280.8 Q(lock_get\(LOCK_T)108 292.8 Q
+(ABLE_T *lt, const DBT *lock)-.9 E(er)-.1 E(,)-.92 E
+(const DBT *obj, const lock_mode_t lock_mode, LOCK_T **lockp\);)158 304.8 Q
+(int)108 328.8 Q(lock_put\(LOCK_T *lockp\);)108 340.8 Q(int)108 364.8 Q
+(lock_close\(LOCK_T)108 376.8 Q(ABLE_T *lt\);)-.9 E(int)108 400.8 Q
+(lock_unlink\(const char *path, int f)108 412.8 Q(or)-.25 E(ce\);)-.18 E F1
+(DESCRIPTION)72 429.6 Q F0 .485(The DB library is a f)108 441.6 R .485
+(amily of groups of functions that pro)-.1 F .486
+(vides a modular programming interf)-.15 F .486(ace to trans-)-.1 F .823
+(actions and record-oriented \214le access.)108 453.6 R .822
+(The library includes support for transaction, locking, logging and)5.822 F
+.258(\214le b)108 465.6 R(uf)-.2 E .258(fering functionality)-.25 F 2.758(,a)
+-.65 G 2.758(sw)223.214 465.6 S .258(ell as v)237.082 465.6 R .258(arious inde)
+-.25 F -.15(xe)-.15 G 2.758(da).15 G .258(ccess methods.)331.434 465.6 R(Man)
+5.258 E 2.758(yo)-.15 G 2.758(ft)427.878 465.6 S .258
+(he functional groups \(e.g.)436.746 465.6 R .528(the memory pool functions\) \
+are useful independently of the rest of the DB functions, although some func-)
+108 477.6 R .306(tional groups are e)108 489.6 R .306
+(xplicitly based on other functional groups \(e.g.)-.15 F .306
+(transactions and logging\).)5.306 F -.15(Fo)5.306 G 2.806(rag).15 G(eneral)
+515.57 489.6 Q .245(description of transactions, see)108 501.6 R/F3 10
+/Times-Italic@0 SF(db_txn)2.745 E F0 2.745(\(3\). F).24 F .245
+(or a general description of the access methods, see)-.15 F F3(db_open)2.745 E
+F0(\(3\)).24 E .307(and then the indi)108 513.6 R .307
+(vidual access method manual pages:)-.25 F F3(db_btr)2.808 E(ee)-.37 E F0
+(\(3\),).18 E F3(db_hash)2.808 E F0(\(3\),).28 E F3(db_lo)2.808 E(g)-.1 E F0
+.308(\(3\) and).22 F F3(db_r)2.808 E(ecno)-.37 E F0(\(3\).).18 E -.15(Fo)108
+525.6 S 3.635(rag).15 G 1.135(eneral description of the lock manager)138.45
+525.6 R 3.635(,s)-.4 G(ee)307.32 525.6 Q F3(db_loc)3.635 E(k)-.2 E F0 3.635
+(\(3\). F).67 F 1.135(or a general description of the memory)-.15 F
+(pool manager)108 537.6 Q 2.5(,s)-.4 G(ee)171.2 537.6 Q F3(db_mpool)2.5 E F0
+(\(3\).).51 E
+(This manual page describes speci\214c details of the locking interf)108 554.4
+Q(ace.)-.1 E F3(Db_loc)108 571.2 Q(k)-.2 E F0 .346(is the library interf)2.846
+F .346(ace intended to pro)-.1 F .346(vide general-purpose locking.)-.15 F .347
+(While designed to w)5.347 F .347(ork with)-.1 F .946(the other DB functions, \
+these functions are also useful for more general locking purposes.)108 583.2 R
+.946(Locks can be)5.946 F(shared between processes.)108 595.2 Q .682
+(The function)108 612 R F3(loc)3.182 E(k_cr)-.2 E(eate)-.37 E F0 .683
+(creates and initializes the lock table identi\214ed by the)3.182 F F3(path)
+3.183 E F0(directory)3.183 E 5.683(.T)-.65 G .683(his direc-)501.827 612 R .565
+(tory must already e)108 624 R .565(xist when)-.15 F F3(loc)3.065 E(k_cr)-.2 E
+(eate)-.37 E F0 .565(is called.)3.065 F .565(If the lock table identi\214ed by)
+5.565 F F3(path)3.064 E F0 .564(already e)3.064 F .564(xists, then)-.15 F F3
+(loc)108 636 Q(k_cr)-.2 E(eate)-.37 E F0 .974
+(returns success without further action.)3.474 F .974
+(The \214les associated with the lock table are created in)5.974 F 2.017
+(the directory speci\214ed by)108 648 R F3(path)4.517 E F0 7.017(.\().28 G
+2.017(The group of the created \214les is based on the system and directory)
+250.846 648 R(def)108 660 Q .076(aults, and is not further speci\214ed by)-.1 F
+F3(loc)2.576 E(k_cr)-.2 E(eate)-.37 E F0 2.576(.\) All).18 F .076
+(\214les created by)2.576 F F3(loc)2.576 E(k_cr)-.2 E(eate)-.37 E F0 .077
+(are created with mode)2.577 F F3(mode)108 672 Q F0(\(as described in)2.5 E F3
+-.15(ch)2.5 G(mod).15 E F0(\(2\)\) and modi\214ed by the process' umask v).77 E
+(alue \(see)-.25 E F3(umask)2.5 E F0(\(2\)\).).67 E .739(The parameter)108
+688.8 R F3(loc)3.239 E(k_modes)-.2 E F0 .739(is the number of lock modes to be\
+ recognized by the lock table \(including the)3.239 F(4.4 Berk)72 732 Q(ele)-.1
+E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(1)
+535 732 Q EP
+%%Page: 2 7
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 117.9(DB_LOCK\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 117.9(anual DB_LOCK\(3\))340.17 48 R -.74(``)108 84 S(not-granted')
+.74 E 2.5('m)-.74 G 2.5(ode\). The)176.22 84 R(parameter)2.5 E/F1 10
+/Times-Italic@0 SF(con\215icts)2.5 E F0(is an)2.5 E F1(loc)2.5 E(k_modes)-.2 E
+F0(by)2.5 E F1(loc)2.5 E(k_modes)-.2 E F0(array)2.5 E 5(.A)-.65 G(non-0 v)
+467.59 84 Q(alue for:)-.25 E(con\215icts[requested_mode][held_mode])158 108 Q
+.174(indicates that)108 132 R F1 -.37(re)2.674 G(quested_mode).37 E F0(and)
+2.674 E F1(held_mode)2.674 E F0 2.675(con\215ict. The)2.674 F -.74(``)2.675 G
+(not-granted').74 E 2.675('m)-.74 G .175(ode must be represented by 0.)419.705
+132 R(The include \214le <db_lock.h> declares tw)108 148.8 Q 2.5(oc)-.1 G
+(ommonly used con\215ict arrays:)283.87 148.8 Q(int lock_sx_n;)108 165.6 Q
+(const int8_t lock_sx_c[lock_sx_n][lock_sx_n];)108 177.6 Q(These v)133 189.6 Q
+(ariables specify a con\215ict array for a simple scheme using shared and e)
+-.25 E(xclusi)-.15 E .3 -.15(ve l)-.25 H(ock modes.).15 E(int lock_g_n;)108
+206.4 Q(const int8_t lock_g_c[lock_g_n][lock_g_n];)108 218.4 Q 1.071(These v)
+133 230.4 R 1.071(ariables specify a con\215ict array that in)-.25 F -.2(vo)-.4
+G(lv).2 E 1.071(es v)-.15 F 1.07
+(arious intent lock modes \(e.g. intent shared\))-.25 F
+(that are used for multigranularity locking.)133 242.4 Q 1.53
+(In addition, <db_lock.h> de\214nes the follo)108 259.2 R 1.531
+(wing macros that name lock modes for use with the standard)-.25 F(tables abo)
+108 271.2 Q -.15(ve)-.15 G(:).15 E(LOCK_IS)144 288 Q(intent shared)169 300 Q
+(LOCK_IX)144 312 Q(intent e)169 324 Q(xclusi)-.15 E -.15(ve)-.25 G(LOCK_NG)144
+336 Q(not granted \(al)169 348 Q -.1(wa)-.1 G(ys 0\)).1 E(LOCK_S)144 360 Q
+(shared)169 372 Q(LOCK_SIX)144 384 Q(shared/intent e)169 396 Q(xclusi)-.15 E
+-.15(ve)-.25 G(LOCK_X)144 408 Q -.15(ex)169 420 S(clusi).15 E -.15(ve)-.25 G F1
+(Maxloc)108 436.8 Q(ks)-.2 E F0 .442(is the maximum number of locks to be held\
+ or requested in the table, and is used by)2.942 F F1(loc)2.941 E(k_cr)-.2 E
+(eate)-.37 E F0(to estimate ho)108 448.8 Q 2.5(wm)-.25 G
+(uch space to allocate for v)181.36 448.8 Q(arious lock-table data structures.)
+-.25 E(The function)108 465.6 Q F1(loc)2.5 E(k_cr)-.2 E(eate)-.37 E F0
+(returns -1 on f)2.5 E(ailure, setting)-.1 E F1(errno)2.5 E F0 2.5(,a).18 G
+(nd 0 on success.)356.07 465.6 Q .202(The function)108 482.4 R F1(loc)2.703 E
+(k_open)-.2 E F0 .203(returns a pointer to the lock table identi\214ed by)2.703
+F F1(path)2.703 E F0 2.703(,w).28 G .203(hich must ha)425.678 482.4 R .503 -.15
+(ve a)-.2 H .203(lready been).15 F 1.162(created by a call to)108 494.4 R F1
+(loc)3.661 E(k_cr)-.2 E(eate)-.37 E F0 6.161(.T).18 G 1.161(he process must ha)
+252.869 494.4 R 1.461 -.15(ve p)-.2 H 1.161
+(ermission to read and write \214les with o).15 F(wners,)-.25 E .06
+(groups and permissions as described for)108 506.4 R F1(loc)2.56 E(k_cr)-.2 E
+(eate)-.37 E F0 5.06(.T).18 G(he)331.04 506.4 Q F1(loc)2.56 E(k_open)-.2 E F0
+.06(function returns NULL on f)2.56 F .06(ailure, set-)-.1 F(ting)108 518.4 Q
+F1(errno)2.5 E F0(.).18 E .986(The function)108 535.2 R F1(loc)3.486 E(k_vec)
+-.2 E F0 .986
+(atomically obtains and releases one or more locks from the designated table.)
+3.486 F(The)5.986 E(function)108 547.2 Q F1(loc)4.52 E(k_vec)-.2 E F0 2.02(is \
+intended to support acquisition or trading of multiple locks under one lock ta\
+ble)4.52 F(semaphore, as is needed for lock coupling or in multigranularity lo\
+cking for lock escalation.)108 559.2 Q .746(If an)108 576 R 3.246(yo)-.15 G
+3.246(ft)140.442 576 S .746(he requested locks cannot be acquired or an)149.798
+576 R 3.246(yo)-.15 G 3.246(ft)342.786 576 S .746
+(he locks to be released cannot be released, no)352.142 576 R .117
+(locks are acquired and no locks are released, and)108 588 R F1(loc)2.617 E
+(k_vec)-.2 E F0 .117(returns an error)2.617 F 5.117(.T)-.55 G .117(he function)
+419.211 588 R F1(loc)2.617 E(k_vec)-.2 E F0 .118(returns 0)2.617 F 1.143
+(on success.)108 600 R 1.143(If an error occurs,)6.143 F F1(loc)3.642 E(k_vec)
+-.2 E F0 1.142(returns one of the follo)3.642 F 1.142(wing v)-.25 F 3.642
+(alues. In)-.25 F 1.142(addition, if)3.642 F F1(elistp)3.642 E F0 1.142(is not)
+3.642 F(NULL, it is set to point to the LOCK_REQ_T entry which w)108 612 Q
+(as being processed when the error occurred.)-.1 E(LOCK_GET_DEADLOCK)108 628.8
+Q .431(The speci\214ed)133 640.8 R F1(loc)2.931 E -.1(ke)-.2 G(r).1 E F0 -.1
+(wa)2.931 G 2.931(ss).1 G .431(elected as a victim in order to resolv)239.854
+640.8 R 2.932(ead)-.15 G 2.932(eadlock. In)407.718 640.8 R .432
+(this case, if the)2.932 F F1(con-)2.932 E(\215ict)133 652.8 Q F0(ar)2.901 E
+.401(gument is non-NULL, it is set to reference the identity of a lock)-.18 F
+.4(er holding the lock referenced)-.1 F(by)133 664.8 Q F1(elistp)2.585 E F0
+.085(at the time the request w)2.585 F .085(as denied.)-.1 F .086
+(\(This identity resides in static memory and may be o)5.086 F -.15(ve)-.15 G
+-.2(r-).15 G(written by subsequent calls to)133 676.8 Q F1(loc)2.5 E(k_vec)-.2
+E F0(\).).31 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q
+99.315(ution August)-.2 F(1, 1995)2.5 E(2)535 732 Q EP
+%%Page: 3 8
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 117.9(DB_LOCK\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 117.9(anual DB_LOCK\(3\))340.17 48 R(LOCK_GET_ERR)108 84 Q(OR)-.4 E
+(An error occurred and the e)133 96 Q(xternal v)-.15 E(ariable)-.25 E/F1 10
+/Times-Italic@0 SF(errno)2.5 E F0(has been set to indicate the error)2.5 E(.)
+-.55 E(LOCK_GET_NO)108 112.8 Q(THELD)-.4 E
+(The lock cannot be released, as it w)133 124.8 Q(as not held by the)-.1 E F1
+(loc)2.5 E -.1(ke)-.2 G(r).1 E F0(.).73 E(LOCK_GET_RESOURCE)108 141.6 Q 2.311(\
+The lock manager is unable to grant the requested locks because of limited int\
+ernal resources.)133 153.6 R(\(Releasing locks may allo)133 165.6 Q 2.5(wf)-.25
+G(uture calls to)249.4 165.6 Q F1(loc)2.5 E(k_vec)-.2 E F0(to succeed.\))2.5 E
+(LOCK_GET_TIMEOUT)108 182.4 Q 3.204(At)133 194.4 S .704(imeout ar)146.204 194.4
+R .704(gument w)-.18 F .705(as speci\214ed, and the requested locks were not a)
+-.1 F -.25(va)-.2 G .705(ilable soon enough.).25 F .705(In this)5.705 F .625
+(case, if the)133 206.4 R F1(con\215ict)3.125 E F0(ar)3.125 E .624
+(gument is non-NULL, it is set to reference the identity of a lock)-.18 F .624
+(er holding the)-.1 F .551(lock referenced by)133 218.4 R F1(elistp)3.052 E F0
+.552(at the time the request w)3.052 F .552(as denied.)-.1 F .552
+(\(This identity resides in static memory)5.552 F(and may be o)133 230.4 Q -.15
+(ve)-.15 G(rwritten by subsequent calls to).15 E F1(loc)2.5 E(k_vec)-.2 E F0
+(\).).31 E(The)108 247.2 Q F1(loc)3.005 E -.1(ke)-.2 G(r).1 E F0(ar)3.005 E
+.504(gument speci\214ed to)-.18 F F1(loc)3.004 E(k_vec)-.2 E F0 .504
+(is a pointer to an untyped byte string which identi\214es the entity)3.004 F
+(requesting or releasing the lock.)108 259.2 Q(If)5 E F1(loc)2.5 E -.1(ke)-.2 G
+(r).1 E F0(is NULL, the calling process' pid is used instead.)2.5 E(The)108 276
+Q F1(timeout)4.628 E F0(ar)4.628 E 2.128(gument pro)-.18 F 2.128(vided to)-.15
+F F1(loc)4.628 E(k_vec)-.2 E F0 2.128(speci\214es a maximum interv)4.628 F
+2.128(al to w)-.25 F 2.128(ait for the locks to be)-.1 F 2.642(granted. If)108
+288 R F1(timeout)2.642 E F0 .142(is NULL, it is ignored, and)2.642 F F1(loc)
+2.642 E(k_vec)-.2 E F0 .141
+(will not return until all of the locks are acquired or)2.642 F
+(an error has occurred.)108 300 Q(The)108 316.8 Q F1(list)4.263 E F0 1.764
+(array pro)4.263 F 1.764(vided to)-.15 F F1(loc)4.264 E(k_vec)-.2 E F0 1.764
+(is typedef)4.264 F 2.764 -.5('d i).55 H 4.264(n<).5 G 1.764
+(db_lock.h> as LOCK_REQ_T)331.114 316.8 R 6.764(.A)-.74 G(LOCK_REQ_T)476.67
+316.8 Q(structure has at least the follo)108 328.8 Q
+(wing \214elds, which must be initialized before calling)-.25 E F1(loc)2.5 E
+(k_vec)-.2 E F0(:).31 E(enum lock)108 345.6 Q(op op;)-.1 E
+(The operation to be performed, which must be set to one of the follo)133 357.6
+Q(wing v)-.25 E(alues:)-.25 E(LOCK_GET)133 374.4 Q .201
+(Get a lock, as de\214ned by the v)158 386.4 R .201(alues of)-.25 F F1(loc)
+2.701 E -.1(ke)-.2 G(r).1 E F0(,).73 E F1(obj)2.701 E F0(and)2.7 E F1(loc)2.7 E
+(k_mode)-.2 E F0 5.2(.U).18 G .2(pon return from)435.99 386.4 R F1(loc)2.7 E
+(k_vec)-.2 E F0(,).31 E .161(if the)158 398.4 R F1(loc)2.661 E(kp)-.2 E F0 .162
+(\214eld is non-NULL, a reference to the acquired lock is stored there.)2.662 F
+.162(\(This reference)5.162 F(is in)158 410.4 Q -.25(va)-.4 G(lidated by an).25
+E 2.5(yc)-.15 G(all to)247.19 410.4 Q F1(loc)2.5 E(k_vec)-.2 E F0(or)2.5 E F1
+(loc)2.5 E(k_put)-.2 E F0(which releases the lock.\))2.5 E(LOCK_PUT)133 427.2 Q
+(The lock referenced by the contents of the)158 439.2 Q F1(loc)2.5 E(kp)-.2 E
+F0(\214eld is released.)2.5 E(LOCK_PUT_ALL)133 456 Q .759
+(All locks held by the)158 468 R F1(loc)3.259 E -.1(ke)-.2 G(r).1 E F0 .759
+(are released.)3.259 F(\(An)5.759 E 3.259(yl)-.15 G .759
+(ocks acquired as a part of the current call to)358.501 468 R F1(loc)158 480 Q
+(k_vec)-.2 E F0(are not considered for this operation\).)2.5 E(LOCK_PUT_OBJ)133
+496.8 Q 1.409(All locks held by the)158 508.8 R F1(loc)3.909 E -.1(ke)-.2 G(r)
+.1 E F0 3.909(,o).73 G 3.909(nt)287.704 508.8 S 1.409(he object)299.393 508.8 R
+F1(obj)3.909 E F0 3.909(,w).48 G 1.41(ith the mode speci\214ed by)367.98 508.8
+R F1(loc)3.91 E(k_mode)-.2 E F0 3.91(,a).18 G(re)532.23 508.8 Q 2.802
+(released. A)158 520.8 R F1(loc)2.802 E(k_mode)-.2 E F0 .301
+(of LOCK_NG indicates that all locks on the object should be released.)2.802 F
+(\(An)158 532.8 Q 3.053(yl)-.15 G .553
+(ocks acquired as a part of the current call to)184.233 532.8 R F1(loc)3.054 E
+(k_vec)-.2 E F0 .554(are not considered for this opera-)3.054 F(tion\).)158
+544.8 Q(const DBT obj;)108 561.6 Q
+(An untyped byte string which speci\214es the object to be lock)133 573.6 Q
+(ed or released.)-.1 E(const lock_mode_t lock_mode;)108 590.4 Q
+(The lock mode, used as an inde)133 602.4 Q 2.5(xi)-.15 G(nto)268.94 602.4 Q F1
+(lt)2.5 E F0 1.1 -.55('s c).68 H(on\215ict array).55 E(.)-.65 E
+(LOCK_T **lockp;)108 619.2 Q 2.5(Ap)133 631.2 S
+(ointer to a pointer to a lock reference.)147.72 631.2 Q(The)108 648 Q F1
+(nlist)2.5 E F0(ar)2.5 E(gument speci\214es the number of elements in the)-.18
+E F1(list)2.5 E F0(array)2.5 E(.)-.65 E 1.229(The function)108 664.8 R F1(loc)
+3.729 E(k_g)-.2 E(et)-.1 E F0 1.228(is a simple interf)3.728 F 1.228
+(ace to the)-.1 F F1(loc)3.728 E(k_vec)-.2 E F0(functionality)3.728 E 3.728(,a)
+-.65 G 1.228(nd is equi)416.31 664.8 R -.25(va)-.25 G 1.228
+(lent to calling the).25 F F1(loc)108 676.8 Q(k_vec)-.2 E F0 .123
+(function with the)2.623 F F1(lt)2.623 E F0(and)2.623 E F1(loc)2.623 E -.1(ke)
+-.2 G(r).1 E F0(ar)2.623 E .123(guments, NULL)-.18 F F1(timeout)2.623 E F0(,)
+.68 E F1(elistp)2.623 E F0(and)2.623 E F1(con\215ict)2.623 E F0(ar)2.623 E .124
+(guments, and a sin-)-.18 F .944(gle element)108 688.8 R F1(list)3.444 E F0
+(array)3.444 E 3.444(,f)-.65 G .944(or which the)203.606 688.8 R F1(op)3.444 E
+F0 .944(\214eld is LOCK_GET)3.444 F 3.444(,a)-.74 G .944(nd the)365.014 688.8 R
+F1(obj)3.444 E F0(,).48 E F1(loc)3.444 E(k_mode)-.2 E F0(and)3.444 E F1(loc)
+3.444 E(kp)-.2 E F0 .943(\214elds are)3.443 F(4.4 Berk)72 732 Q(ele)-.1 E 2.5
+(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(3)535
+732 Q EP
+%%Page: 4 9
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 117.9(DB_LOCK\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 117.9(anual DB_LOCK\(3\))340.17 48 R .509(represented by the ar)108
+84 R .509(guments of the same name.)-.18 F .51(Note that the type of the)5.509
+F/F1 10/Times-Italic@0 SF(obj)3.01 E F0(ar)3.01 E .51(gument to)-.18 F F1(loc)
+3.01 E(k_g)-.2 E(et)-.1 E F0 .51(is dif-)3.01 F .765(ferent from the)108 96 R
+F1(obj)3.265 E F0 .765(element found in the LOCK_REQ_T structure.)3.265 F(The)
+5.765 E F1(loc)3.265 E(k_g)-.2 E(et)-.1 E F0 .765(function returns success)
+3.265 F(and f)108 108 Q(ailure as described for the)-.1 E F1(loc)2.5 E(k_vec)
+-.2 E F0(function.)2.5 E 1.186(The function)108 124.8 R F1(loc)3.686 E(k_put)
+-.2 E F0 1.187(is a simple interf)3.687 F 1.187(ace to the)-.1 F F1(loc)3.687 E
+(k_vec)-.2 E F0(functionality)3.687 E 3.687(,a)-.65 G 1.187(nd is equi)416.515
+124.8 R -.25(va)-.25 G 1.187(lent to calling the).25 F F1(loc)108 136.8 Q
+(k_vec)-.2 E F0 .374(function with a single element)2.874 F F1(list)2.874 E F0
+(array)2.873 E 2.873(,f)-.65 G .373(or which the)314.82 136.8 R F1(op)2.873 E
+F0 .373(\214eld is LOCK_PUT and the)2.873 F F1(loc)2.873 E(kp)-.2 E F0(\214eld)
+2.873 E .631(is represented by the ar)108 148.8 R .631
+(gument of the same name.)-.18 F .632(Note that the type of the)5.632 F F1(loc)
+3.132 E(kp)-.2 E F0(ar)3.132 E .632(gument to)-.18 F F1(loc)3.132 E(k_put)-.2 E
+F0(is)3.132 E(dif)108 160.8 Q .275(ferent from the)-.25 F F1(loc)2.775 E(kp)-.2
+E F0 .274(element found in the LOCK_REQ_T structure.)2.775 F(The)5.274 E F1
+(loc)2.774 E(k_put)-.2 E F0 .274(function returns suc-)2.774 F(cess and f)108
+172.8 Q(ailure as described for the)-.1 E F1(loc)2.5 E(k_vec)-.2 E F0
+(function.)2.5 E .013(The function)108 189.6 R F1(loc)2.513 E(k_close)-.2 E F0
+.013(disassociates the calling process from the lock table)2.513 F F1(lt)2.513
+E F0 2.513(,a).68 G .013(fter releasing all locks held)431.636 189.6 R .228
+(or requested by that process.)108 201.6 R .228(The function)5.228 F F1(loc)
+2.728 E(k_close)-.2 E F0 .228(returns -1 on f)2.728 F .227(ailure, setting)-.1
+F F1(errno)2.727 E F0 2.727(,a).18 G .227(nd 0 on success.)474.329 201.6 R .433
+(The function)108 218.4 R F1(loc)2.933 E(k_unlink)-.2 E F0(destro)2.933 E .433
+(ys the lock table identi\214ed by the directory)-.1 F F1(path)2.933 E F0 2.933
+(,r).28 G(emo)440.636 218.4 Q .433(ving all \214les used to)-.15 F 1.005
+(implement the lock table.)108 230.4 R 1.005(\(The directory)6.005 F F1(path)
+3.505 E F0 1.005(is not remo)3.505 F -.15(ve)-.15 G 3.505(d.\) If).15 F 1.005
+(there are processes which ha)3.505 F 1.305 -.15(ve c)-.2 H(alled).15 E F1(loc)
+108 242.4 Q(k_open)-.2 E F0 .869(without calling)3.369 F F1(loc)3.369 E
+(k_close)-.2 E F0 .869
+(\(i.e., there are processes currently using the lock table\),)3.369 F F1(loc)
+3.37 E(k_unlink)-.2 E F0 .409(will f)108 254.4 R .408
+(ail without further action, unless the force \215ag is set, in which case)-.1
+F F1(loc)2.908 E(k_unlink)-.2 E F0 .408(will attempt to delete)2.908 F .807
+(the lock table \214les re)108 266.4 R -.05(ga)-.15 G .808(rdless of an).05 F
+3.308(yp)-.15 G .808(rocesses still using the lock table.)264.662 266.4 R(An)
+5.808 E 3.308(ya)-.15 G .808(ccesses to a remo)433.208 266.4 R -.15(ve)-.15 G
+3.308(dl).15 G(ock)525.56 266.4 Q .046(table will lik)108 278.4 R .046
+(ely result in une)-.1 F .045(xpected beha)-.15 F(vior)-.2 E 5.045(.T)-.55 G
+.045(he function)304.24 278.4 R F1(loc)2.545 E(k_unlink)-.2 E F0 .045
+(returns -1 on f)2.545 F .045(ailure, setting)-.1 F F1(errno)2.545 E F0(,).18 E
+(and 0 on success.)108 290.4 Q .798(In the case of catastrophic or system f)108
+307.2 R .798(ailure, it is possible to clean up a lock table by remo)-.1 F .799
+(ving all of the)-.15 F .38(\214les in the directory speci\214ed to the)108
+319.2 R F1(loc)2.88 E(k_cr)-.2 E(eate)-.37 E F0 .379
+(function, as lock table \214les are ne)2.88 F -.15(ve)-.25 G 2.879(rc).15 G
+.379(reated in an)461.543 319.2 R 2.879(yd)-.15 G(irec-)521.68 319.2 Q
+(tory other than the one speci\214ed to)108 331.2 Q F1(loc)2.5 E(k_cr)-.2 E
+(eate)-.37 E F0(.).18 E/F2 9/Times-Bold@0 SF(ERR)72 348 Q(ORS)-.27 E F0(The)108
+360 Q F1(loc)4.158 E(k_cr)-.2 E(eate)-.37 E F0 1.658(function may f)4.158 F
+1.658(ail and set)-.1 F F1(errno)4.158 E F0 1.658(for an)4.158 F 4.158(yo)-.15
+G 4.158(ft)353.71 360 S 1.659(he errors speci\214ed for the library routines)
+363.978 360 R F1(mmap)108 372 Q F0(\(2\),).19 E F1(open)2.5 E F0(\(2\) and).24
+E F1(malloc)2.5 E F0(\(3\).).31 E(The)108 388.8 Q F1(loc)4.692 E(k_open)-.2 E
+F0 2.192(function may f)4.692 F 2.192(ail and set)-.1 F F1(errno)4.692 E F0
+2.192(for an)4.692 F 4.692(yo)-.15 G 4.692(ft)353.87 388.8 S 2.191
+(he errors speci\214ed for the library routine)364.672 388.8 R F1(mmap)108
+400.8 Q F0(\(2\) and).19 E F1(open)2.5 E F0(\(2\).).24 E(The)108 417.6 Q F1
+(loc)2.57 E(k_close)-.2 E F0 .07(function may f)2.57 F .07(ail and set)-.1 F F1
+(errno)2.57 E F0 .07(for an)2.57 F 2.57(yo)-.15 G 2.57(ft)333.76 417.6 S .07
+(he errors speci\214ed for the library routine)342.44 417.6 R F1(close)2.57 E
+F0(\(2\)).18 E(and)108 429.6 Q F1(munmap)2.5 E F0(\(2\).).19 E(The)108 446.4 Q
+F1(loc)4.071 E(k_unlink)-.2 E F0 1.571(function may f)4.071 F 1.571
+(ail and set)-.1 F F1(errno)4.071 E F0 1.571(for an)4.071 F 4.071(yo)-.15 G
+4.07(ft)353.22 446.4 S 1.57(he errors speci\214ed for the library function)
+363.4 446.4 R F1(unlink)108 458.4 Q F0(\(2\) or the follo).67 E(wing:)-.25 E
+([EB)108 475.2 Q(USY])-.1 E(The lock table w)133 487.2 Q
+(as in use and the force \215ag w)-.1 E(as not set.)-.1 E F2(SEE ALSO)72 504 Q
+F1(db_btr)108 516 Q(ee)-.37 E F0(\(3\),).18 E F1(db_hash)2.5 E F0(\(3\),).28 E
+F1(db_lo)2.5 E(g)-.1 E F0(\(3\),).22 E F1(db_mpool)2.5 E F0(\(3\),).51 E F1
+(db_open)2.5 E F0(\(3\),).24 E F1(db_r)2.5 E(ecno)-.37 E F0(\(3\),).18 E F1
+(db_txn)2.5 E F0(\(3\)).24 E F2 -.09(BU)72 532.8 S(GS).09 E F0(The)108 544.8 Q
+F1(maxloc)2.656 E(ks)-.2 E F0 .156
+(parameter is a kluge, and should be deleted in f)2.656 F -.2(avo)-.1 G 2.657
+(ro).2 G 2.657(fd)381.055 544.8 S .157(ynamically e)392.042 544.8 R .157
+(xpanding the lock table.)-.15 F(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G
+(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(4)535 732 Q EP
+%%Page: 1 10
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_LOG\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_LOG\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72
+84 S(ME).18 E F0(db_log \255 log-manager access method)108 96 Q F1(DESCRIPTION)
+72 112.8 Q F0 .486(The DB library is a f)108 124.8 R .485
+(amily of groups of functions that pro)-.1 F .485
+(vides a modular programming interf)-.15 F .485(ace to trans-)-.1 F .822
+(actions and record-oriented \214le access.)108 136.8 R .822
+(The library includes support for transaction, locking, logging and)5.822 F
+.258(\214le b)108 148.8 R(uf)-.2 E .258(fering functionality)-.25 F 2.758(,a)
+-.65 G 2.758(sw)223.214 148.8 S .258(ell as v)237.082 148.8 R .258(arious inde)
+-.25 F -.15(xe)-.15 G 2.758(da).15 G .258(ccess methods.)331.434 148.8 R(Man)
+5.258 E 2.758(yo)-.15 G 2.758(ft)427.878 148.8 S .258
+(he functional groups \(e.g.)436.746 148.8 R .528(the memory pool functions\) \
+are useful independently of the rest of the DB functions, although some func-)
+108 160.8 R .306(tional groups are e)108 172.8 R .306
+(xplicitly based on other functional groups \(e.g.)-.15 F .306
+(transactions and logging\).)5.306 F -.15(Fo)5.306 G 2.806(rag).15 G(eneral)
+515.57 172.8 Q .245(description of transactions, see)108 184.8 R/F2 10
+/Times-Italic@0 SF(db_txn)2.745 E F0 2.745(\(3\). F).24 F .245
+(or a general description of the access methods, see)-.15 F F2(db_open)2.745 E
+F0(\(3\)).24 E .308(and then the indi)108 196.8 R .308
+(vidual access method manual pages:)-.25 F F2(db_btr)2.807 E(ee)-.37 E F0
+(\(3\),).18 E F2(db_hash)2.807 E F0(\(3\),).28 E F2(db_lo)2.807 E(g)-.1 E F0
+.307(\(3\) and).22 F F2(db_r)2.807 E(ecno)-.37 E F0(\(3\).).18 E -.15(Fo)108
+208.8 S 3.635(rag).15 G 1.135(eneral description of the lock manager)138.45
+208.8 R 3.635(,s)-.4 G(ee)307.32 208.8 Q F2(db_loc)3.635 E(k)-.2 E F0 3.635
+(\(3\). F).67 F 1.135(or a general description of the memory)-.15 F
+(pool manager)108 220.8 Q 2.5(,s)-.4 G(ee)171.2 220.8 Q F2(db_mpool)2.5 E F0
+(\(3\).).51 E
+(This manual page describes speci\214c details of the logging access method.)
+108 237.6 Q .03(These functions pro)108 254.4 R .03
+(vide a general-purpose logging f)-.15 F .03(acility suf)-.1 F .03
+(\214cient for transaction management.)-.25 F .03(Logs can)5.03 F
+(be shared by multiple processes.)108 266.4 Q 3.717(Al)108 283.2 S 1.217
+(og is represented by the directory)121.717 283.2 R(,)-.65 E F2 1.217
+(not the \214le)3.717 F F0 3.717(,n).18 G 1.217(amed by the \214rst ar)323
+283.2 R 1.218(gument to)-.18 F F2(db_open)3.718 E F0 3.718(\(3\). The).24 F
+(\214rst)3.718 E(ar)108 295.2 Q .26
+(gument must be non-NULL, and the directory must already e)-.18 F(xist)-.15 E
+F2(db_open)2.76 E F0 .26(is called.)2.76 F .26(In that directory)5.26 F 2.76
+(,t)-.65 G(he)530.56 295.2 Q 3.448
+(log is stored in one or more \214les named in the format `)108 307.2 R
+(`log.YYYY)-.74 E(.MM.DD.HH.MM.SS')-1.29 E 3.448(', where)-.74 F -.74(``)108
+319.2 S(YYYY).74 E(.MM.DD.HH.SS')-1.29 E 2.507('i)-.74 G 2.507(st)220.497 319.2
+S .007(he approximate creation time of the log \214le, and is guaranteed to be\
+ unique in)229.674 319.2 R(the directory)108 331.2 Q(.)-.65 E .465
+(The group of the created \214les is based on the system and directory def)108
+348 R .466(aults, and is not further speci\214ed by)-.1 F .073
+(the log access method.)108 360 R .072(All \214les are created with the)5.073 F
+F2(mode)2.572 E F0 .072(speci\214ed to)2.572 F F2(db_open)2.572 E F0 2.572(,\()
+.24 G .072(as described in)435.584 360 R F2 -.15(ch)2.572 G(mod).15 E F0
+(\(2\)\)).77 E(and modi\214ed by the process' umask v)108 372 Q(alue \(see)-.25
+E F2(umask)2.5 E F0(\(2\)\).).67 E(The)108 388.8 Q F2<8d61>2.5 E(gs)-.1 E F0
+(ar)2.5 E(gument to)-.18 E F2(db_open)2.5 E F0(must be 0 for the)2.5 E F2
+(db_lo)2.5 E(g)-.1 E F0(access method.)2.5 E F1 -.495(AC)72 405.6 S
+(CESS METHOD SPECIFIC INFORMA).495 E(TION)-.855 E F0 .571
+(The log access method speci\214c data structure pro)108 417.6 R .571(vided to)
+-.15 F F2(db_open)3.071 E F0 .572(is typedef)3.071 F 1.572 -.5('d a).55 H .572
+(nd named LOGINFO.).5 F(A)5.572 E(LOGINFO structure has at least the follo)108
+429.6 Q(wing \214elds, which may be initialized before calling)-.25 E F2
+(db_open)2.5 E F0(:).24 E(of)108 446.4 Q(f_t max_\214le_size;)-.25 E 1.585
+(The maximum size of a single \214le in the log.)133 458.4 R 1.584
+(If not speci\214ed, the maximum size def)6.584 F 1.584(aults to an)-.1 F
+(implementation-speci\214c v)133 470.4 Q(alue.)-.25 E(int lorder;)108 487.2 Q
+.65(The byte order for inte)133 499.2 R .65
+(gers in the stored database metadata.)-.15 F .65
+(The number should represent the order)5.65 F .749(as an inte)133 511.2 R .749
+(ger; for e)-.15 F .749(xample, big endian order w)-.15 F .749
+(ould be the number 4,321.)-.1 F(If)5.749 E F2(lor)3.249 E(der)-.37 E F0 .749
+(is 0 \(no order is)3.249 F(speci\214ed\) the current host order is used.)133
+523.2 Q 1.284(If the log already e)108 540 R 1.284(xists, the v)-.15 F 1.285(a\
+lues speci\214ed for the parameters max_\214le_size and lorder are ignored in)
+-.25 F -.1(fa)108 552 S -.2(vo)-.1 G 2.5(ro).2 G 2.5(ft)136.1 552 S(he v)144.71
+552 Q(alues used when the log w)-.25 E(as created.)-.1 E F1(DB OPERA)72 568.8 Q
+(TIONS)-.855 E F0 .687(The data part of the k)108 580.8 R -.15(ey)-.1 G .686(/\
+data pair used by the log access method is the same as for other access method\
+s.).15 F .837(The k)108 592.8 R 1.137 -.15(ey i)-.1 H 3.337(sd).15 G(if)159.421
+592.8 Q 3.337(ferent. Each)-.25 F .837(log record is identi\214ed by a log seq\
+uence number \(LSN\), which is stored in a)3.337 F(DBT)108 604.8 Q 2.702(,a)
+-.74 G .202(nd which is used as the)136.902 604.8 R F2 -.1(ke)2.702 G(y)-.2 E
+F0 .202(for all log functions that tak)2.702 F(e)-.1 E F2 -.1(ke)2.701 G(y)-.2
+E F0(ar)2.701 E 2.701(guments. Applications)-.18 F .201(cannot create)2.701 F
+(LSN')108 616.8 Q .539(s, and all LSN')-.55 F 3.039(sp)-.55 G(ro)203.216 616.8
+Q .539(vided to functions as ar)-.15 F .539(guments must \214rst be retrie)-.18
+F -.15(ve)-.25 G 3.04(du).15 G .54(sing the)440.37 616.8 R F2(put)3.04 E F0(or)
+3.04 E F2(seq)3.04 E F0(func-)3.04 E 2.783(tions. T)108 628.8 R 2.783(op)-.8 G
+(ro)153.326 628.8 Q .283(vide a distinguished v)-.15 F .282
+(alue for applications, it is guaranteed that no v)-.25 F .282(alid LSN will e)
+-.25 F -.15(ve)-.25 G 2.782(rh).15 G -2.25 -.2(av e)519.248 628.8 T(a)2.982 E
+(size of 0.)108 640.8 Q(Applications can compare LSN')108 657.6 Q 2.5(su)-.55 G
+(sing the)247.98 657.6 Q F2(lo)2.5 E(g_lsn_compar)-.1 E(e)-.37 E F0
+(function \(see belo)2.5 E(w\).)-.25 E .429(Applications can associate LSN')108
+674.4 R 2.929(sw)-.55 G .429(ith speci\214c log \214les.)253.586 674.4 R .429
+(The function)5.429 F F2(lo)2.929 E(g_lsn_\214le)-.1 E F0 .43(\(see belo)2.93 F
+.43(w\), returns the)-.25 F .214
+(name of the log \214le containing the record with a speci\214ed LSN.)108 686.4
+R .214(\(The mapping of LSN to \214le is needed for)5.214 F(4.4 Berk)72 732 Q
+(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(3, 1995)
+2.5 E(1)535 732 Q EP
+%%Page: 2 11
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_LOG\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_LOG\(3\))340.17 48 R .397(database administration.)
+108 84 R -.15(Fo)5.397 G 2.897(re).15 G .398
+(xample, a transaction manager typically records the earliest LSN needed for)
+231.931 84 R .519(restart, and the database administrator may w)108 96 R .519
+(ant to archi)-.1 F .819 -.15(ve l)-.25 H .519(og \214les to tape when the).15
+F 3.018(yc)-.15 G .518(ontain only LSN')465.624 96 R(s)-.55 E
+(before the earliest one needed for restart.\))108 108 Q
+(Applications can truncate the log \214le up to a speci\214c LSN using the)108
+124.8 Q/F1 10/Times-Italic@0 SF(lo)2.5 E(g_trunc)-.1 E F0(function \(see belo)
+2.5 E(w\).)-.25 E .221(The functions returned by)108 141.6 R F1(db_open)2.721 E
+F0 .221(for the log access method are as described in)2.721 F F1(db_open)2.721
+E F0 2.722(,w).24 G .222(ith the follo)482.586 141.6 R(w-)-.25 E(ing e)108
+153.6 Q(xceptions and additions:)-.15 E 5.28(type The)108 170.4 R
+(type is DB_LOG.)2.5 E 10.28(del The)108 187.2 R F1(del)3.505 E F0 1.005
+(function al)3.505 F -.1(wa)-.1 G 1.005
+(ys returns an error for the log-manager access method, setting).1 F F1(errno)
+3.504 E F0 1.004(to EIN-)3.504 F -1.35(VA)133 199.2 S(L.)1.35 E
+(int \(*log_\215ush\)\(const DB *db, const DBT *lsn\);)108 216 Q(The)133 228 Q
+F1(lo)2.866 E(g_\215ush)-.1 E F0 .367
+(function \215ushes the log up to and including the log record)2.866 F F1(lsn)
+2.867 E F0 5.367(.T).24 G .367(he function)454.926 228 R F1(lo)2.867 E
+(g_\215ush)-.1 E F0(returns -1 on f)133 240 Q(ailure, setting)-.1 E F1(errno)
+2.5 E F0 2.5(,a).18 G(nd 0 on success.)278.61 240 Q
+(int \(*log_lsn_compare\)\(const DB *,)108 256.8 Q .255
+(const DBT *lsn1, const DBT *lsn2\); A pointer to a function which is pro)183
+268.8 R .255(vided to permit)-.15 F .312(applications to compare LSN')133 280.8
+R 2.812(s. The)-.55 F F1(lo)2.812 E(g_lsn_compar)-.1 E(e)-.37 E F0 .312
+(function returns an inte)2.812 F .313(ger less than, equal to,)-.15 F .058
+(or greater than zero if the \214rst LSN is considered to be respecti)133 292.8
+R -.15(ve)-.25 G .058(ly less than, equal to, or greater than).15 F
+(the second LSN.)133 304.8 Q(int \(*log_lsn_\214le\)\(const DB *db,)108 321.6 Q
+(const DBT *lsn, char *name\);)183 333.6 Q(The)133 345.6 Q F1(lo)3.21 E
+(g_lsn_\214le)-.1 E F0 .71
+(function stores a pointer to the name of the \214le containing)3.21 F F1(lsn)
+3.211 E F0 .711(in the address refer)3.211 F(-)-.2 E .293(enced by)133 357.6 R
+F1(name)2.793 E(.)-.15 E F0 .293(This pointer is to an internal static object,\
+ and subsequent calls to the same function)5.293 F
+(will modify the same object.)133 369.6 Q(The function)133 386.4 Q F1(lo)2.5 E
+(g_lsn_\214le)-.1 E F0(returns -1 on f)2.5 E(ailure, setting)-.1 E F1(errno)2.5
+E F0 2.5(,a).18 G(nd 0 on success.)381.56 386.4 Q
+(int \(*log_unlink\)\(const char *path, int force\);)108 403.2 Q(The)133 415.2
+Q F1(lo)3.275 E(g_unlink)-.1 E F0 .775(function destro)3.275 F .775
+(ys the log represented by)-.1 F F1(path)3.275 E F0 5.775(.I).28 G 3.275(ft)
+394.745 415.2 S(he)404.13 415.2 Q F1(for)3.275 E(ce)-.37 E F0 .776
+(parameter is not set to 1)3.275 F .725
+(and there are other processes using the log, then)133 427.2 R F1(lo)3.224 E
+(g_unlink)-.1 E F0 .724(will return -1, setting)3.224 F F1(errno)3.224 E F0
+.724(to EB)3.224 F(USY)-.1 E(.)-1.29 E(If)133 439.2 Q F1(for)2.831 E .331
+(ce is not set or ther)-.37 F 2.831(ea)-.37 G 1.071 -.37(re n)244.287 439.2 T
+2.831(op).37 G -.45(ro)272.909 439.2 S .331(cesses using the lo).45 F .532 -.1
+(g, t)-.1 H .332(hen all \214les).1 F F0 .332(used by the log are destro)2.832
+F(yed.)-.1 E F1(lo)133 451.2 Q(g_unlink)-.1 E F0(will return -1 on f)2.5 E
+(ailure, setting)-.1 E F1(errno)2.5 E F0 2.5(,a).18 G(nd 0 on success.)337.96
+451.2 Q(int \(*log_trunc\)\(const DB *db, const DBT *lsn\);)108 468 Q(The)133
+480 Q F1(lo)2.601 E(g_trunc)-.1 E F0 .101
+(function truncates the log up to an LSN which is less than)2.601 F F1(lsn)2.6
+E F0 5.1(.T).24 G .1(he function)453.24 480 R F1(lo)2.6 E(g_trunc)-.1 E F0
+(returns -1 on f)133 492 Q(ailure, setting)-.1 E F1(errno)2.5 E F0 2.5(,a).18 G
+(nd 0 on success.)278.61 492 Q 9.72(put A)108 508.8 R .339
+(log record containing)2.839 F F1(data)2.839 E F0 .339(is appended to the log.)
+2.839 F(Unlik)5.339 E 2.84(et)-.1 G(he)382.44 508.8 Q F1(put)2.84 E F0 .34
+(functions for other access meth-)2.84 F .789(ods, the k)133 520.8 R 1.089 -.15
+(ey p)-.1 H .788(arameter is not initialized by the application, instead, the \
+LSN assigned to the data is).15 F(returned in the)133 532.8 Q F1 -.1(ke)2.5 G
+(y)-.2 E F0(parameter)2.5 E(.)-.55 E 1.157(The caller is responsible for pro)
+133 549.6 R 1.157(viding an)-.15 F 3.657(yn)-.15 G 1.157(ecessary structure to)
+318.267 549.6 R F1 1.157(data .)3.657 F F0(\(F)6.157 E 1.157(or e)-.15 F 1.157
+(xample, in a write-)-.15 F .267
+(ahead logging protocol, the application must understand what part of)133 561.6
+R F1(data)2.767 E F0 .266(is an operation code, what)2.766 F .622
+(part is redo information, and what part is undo information.)133 573.6 R .622
+(In addition, most transaction managers)5.622 F .985(will store in)133 585.6 R
+F1(data)3.485 E F0 .985(the LSN of the pre)3.485 F .984
+(vious log record for the same transaction, to support chaining)-.25 F
+(back through the transaction')133 597.6 Q 2.5(sl)-.55 G
+(og records during undo.\))258.54 597.6 Q(The parameter)133 614.4 Q F1<8d61>2.5
+E(g)-.1 E F0(must be set to 0 or e)2.5 E(xactly one of the follo)-.15 E(wing v)
+-.25 E(alues:)-.25 E(R_CHECKPOINT)133 631.2 Q .5(Specify the k)158 643.2 R -.15
+(ey)-.1 G .5(/data pair of the current call as the one to be returned when the)
+.15 F F1(seq)3 E F0 .5(function is)3 F(ne)158 655.2 Q
+(xt called with the R_CHECKPOINT \215ag.)-.15 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5
+(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(3, 1995)2.5 E(2)535
+732 Q EP
+%%Page: 3 12
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_LOG\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_LOG\(3\))340.17 48 R(R_FLUSH)133 84 Q
+(Flush immediately \(ignoring an)158 96 Q 2.5(yp)-.15 G
+(ossibility for group commit\).)296.74 96 Q 9.17(seq The)108 112.8 R/F1 10
+/Times-Italic@0 SF(seq)2.5 E F0(function tak)2.5 E(es the follo)-.1 E
+(wing additional \215ag:)-.25 E(R_CHECKPOINT)133 129.6 Q .184(The last k)158
+141.6 R -.15(ey)-.1 G .184(/data pair stored by the).15 F F1(put)2.684 E F0
+.183(function \(using the R_CHECKPOINT \215ag\) is returned,)2.684 F .216
+(and the cursor is set or initialized to reference it.)158 153.6 R .216(The e)
+5.216 F .216(xpected use of this \215ag is during restart)-.15 F .801
+(and to determine what part of the log must be a)158 165.6 R -.25(va)-.2 G .801
+(ilable for restart.).25 F .801(Therefore, the log record)5.801 F(retrie)158
+177.6 Q -.15(ve)-.25 G 3.352(dw).15 G .853
+(ith R_CHECKPOINT should contain all the information that the transaction man-)
+203.712 177.6 R(ager will need for this purpose.)158 189.6 Q 4.17(sync The)108
+206.4 R F1(sync)3.135 E F0 .635(function al)3.135 F -.1(wa)-.1 G .635
+(ys returns an error for the log-manager access method, setting).1 F F1(errno)
+3.134 E F0 .634(to EIN-)3.134 F -1.35(VA)133 218.4 S(L.)1.35 E/F2 9
+/Times-Bold@0 SF(SEE ALSO)72 235.2 Q F1(db_btr)108 247.2 Q(ee)-.37 E F0(\(3\),)
+.18 E F1(db_hash)2.5 E F0(\(3\),).28 E F1(db_loc)2.5 E(k)-.2 E F0(\(3\),).67 E
+F1(db_mpool)2.5 E F0(\(3\),).51 E F1(db_open)2.5 E F0(\(3\),).24 E F1(db_r)2.5
+E(ecno)-.37 E F0(\(3\),).18 E F1(db_txn)2.5 E F0(\(3\)).24 E(4.4 Berk)72 732 Q
+(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(3, 1995)
+2.5 E(3)535 732 Q EP
+%%Page: 1 13
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 110.12(DB_MPOOL\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 110.12(anual DB_MPOOL\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)
+72 84 S(ME).18 E F0(db_mpool \255 general purpose shared memory b)108 96 Q(uf)
+-.2 E(fer pool)-.25 E F1(SYNOPSIS)72 112.8 Q/F2 10/Times-Bold@0 SF
+(#include <db)108 124.8 Q(.h>)-.4 E(#include <mpool.h>)108 136.8 Q(int)108
+160.8 Q(mpool_cr)108 172.8 Q
+(eate\(char *path, mode_t mode, size_t cachesize, u_long \215ags\);)-.18 E
+(MPOOL *)108 196.8 Q(mpool_open\(char *path\);)108 208.8 Q(int)108 232.8 Q
+(mpool_close\(MPOOL *mp\);)108 244.8 Q(MPOOLFILE *)108 268.8 Q(mpool_f)108
+280.8 Q(open\(MPOOL *mp, char *path, size_t pagesize, v)-.25 E(oid *pgcookie,)
+-.1 E(int \(*pgin\)\(MPOOLFILE *mpf)158 292.8 Q(,)-.15 E(pgno_t pgno, v)188
+304.8 Q(oid *pgaddr)-.1 E 2.5(,v)-.92 G(oid *pgcookie\),)311.91 304.8 Q
+(int \(*pgout\)\(MPOOLFILE *mpf)158 316.8 Q(,)-.15 E(pgno_t pgno, v)188 328.8 Q
+(oid *pgaddr)-.1 E 2.5(,v)-.92 G(oid *pgcookie\);)311.91 328.8 Q(int)108 352.8
+Q(mpool_fclose\(MPOOLFILE *mpf\);)108 364.8 Q -.1(vo)108 388.8 S(id *).1 E
+(mpool_get\(MPOOLFILE *mpf)108 400.8 Q 2.5(,p)-.15 G(gno_t *pgnoaddr)252.02
+400.8 Q 2.5(,u)-.92 G(_long \215ags,)334.73 400.8 Q
+(int \(*callback\)\(MPOOLFILE *mpf)158 412.8 Q 2.5(,p)-.15 G(gno_t pgno\)\);)
+318.97 412.8 Q(int)108 436.8 Q(mpool_put\(MPOOLFILE *mpf)108 448.8 Q 2.5(,v)
+-.15 G(oid *pgaddr)253.04 448.8 Q 2.5(,u)-.92 G(_long \215ags\);)314.64 448.8 Q
+(int)108 472.8 Q(mpool_sync\(MPOOLFILE *mpf\);)108 484.8 Q(int)108 508.8 Q
+(mpool_unlink\(const char *path, int f)108 520.8 Q(or)-.25 E(ce\);)-.18 E -.1
+(vo)108 544.8 S(id).1 E(mpool_stat\(MPOOL *mp, FILE *fp\);)108 556.8 Q F1
+(DESCRIPTION)72 573.6 Q F0 .485(The DB library is a f)108 585.6 R .485
+(amily of groups of functions that pro)-.1 F .486
+(vides a modular programming interf)-.15 F .486(ace to trans-)-.1 F .823
+(actions and record-oriented \214le access.)108 597.6 R .822
+(The library includes support for transaction, locking, logging and)5.822 F
+.258(\214le b)108 609.6 R(uf)-.2 E .258(fering functionality)-.25 F 2.758(,a)
+-.65 G 2.758(sw)223.214 609.6 S .258(ell as v)237.082 609.6 R .258(arious inde)
+-.25 F -.15(xe)-.15 G 2.758(da).15 G .258(ccess methods.)331.434 609.6 R(Man)
+5.258 E 2.758(yo)-.15 G 2.758(ft)427.878 609.6 S .258
+(he functional groups \(e.g.)436.746 609.6 R .528(the memory pool functions\) \
+are useful independently of the rest of the DB functions, although some func-)
+108 621.6 R .306(tional groups are e)108 633.6 R .306
+(xplicitly based on other functional groups \(e.g.)-.15 F .306
+(transactions and logging\).)5.306 F -.15(Fo)5.306 G 2.806(rag).15 G(eneral)
+515.57 633.6 Q .245(description of transactions, see)108 645.6 R/F3 10
+/Times-Italic@0 SF(db_txn)2.745 E F0 2.745(\(3\). F).24 F .245
+(or a general description of the access methods, see)-.15 F F3(db_open)2.745 E
+F0(\(3\)).24 E .307(and then the indi)108 657.6 R .307
+(vidual access method manual pages:)-.25 F F3(db_btr)2.808 E(ee)-.37 E F0
+(\(3\),).18 E F3(db_hash)2.808 E F0(\(3\),).28 E F3(db_lo)2.808 E(g)-.1 E F0
+.308(\(3\) and).22 F F3(db_r)2.808 E(ecno)-.37 E F0(\(3\).).18 E -.15(Fo)108
+669.6 S 3.635(rag).15 G 1.135(eneral description of the lock manager)138.45
+669.6 R 3.635(,s)-.4 G(ee)307.32 669.6 Q F3(db_loc)3.635 E(k)-.2 E F0 3.635
+(\(3\). F).67 F 1.135(or a general description of the memory)-.15 F
+(pool manager)108 681.6 Q 2.5(,s)-.4 G(ee)171.2 681.6 Q F3(db_mpool)2.5 E F0
+(\(3\).).51 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q
+99.315(ution August)-.2 F(1, 1995)2.5 E(1)535 732 Q EP
+%%Page: 2 14
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 110.12(DB_MPOOL\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 110.12(anual DB_MPOOL\(3\))340.17 48 R
+(This manual page describes speci\214c details of the memory pool interf)108 84
+Q(ace.)-.1 E(The)108 100.8 Q/F1 10/Times-Italic@0 SF(db_mpool)3.682 E F0 1.182
+(function is the library interf)3.682 F 1.183(ace intended to pro)-.1 F 1.183
+(vide general-purpose, page-oriented b)-.15 F(uf)-.2 E(fer)-.25 E .16
+(management of one or more \214les.)108 112.8 R .16(While designed to w)5.16 F
+.16(ork with the other DB functions, these functions are)-.1 F .604
+(also useful for more general purposes.)108 124.8 R .604
+(The memory pools \(MPOOL)5.604 F -.55('s)-.92 G 3.104(\)a).55 G .605
+(re referred to in this document as)404.18 124.8 R .985(simply `)108 136.8 R
+(`pools')-.74 E 3.485('. Pools)-.74 F .985(may be shared between processes.)
+3.485 F .985(Pools are usually \214lled by pages from one or)5.985 F .673
+(more \214les \(MPOOLFILE')108 148.8 R 3.173(s\). P)-.55 F .674
+(ages in the pool are replaced in LR)-.15 F 3.174(U\()-.4 G .674
+(least-recently-used\) order)392.318 148.8 R 3.174(,w)-.4 G .674(ith each)
+507.946 148.8 R(ne)108 160.8 Q 4.243(wp)-.25 G 1.743
+(age replacing the page which has been unused the longest.)133.653 160.8 R -.15
+(Pa)6.742 G 1.742(ges retrie).15 F -.15(ve)-.25 G 4.242(df).15 G 1.742
+(rom the pool using)459.494 160.8 R F1(mpool_g)108 172.8 Q(et)-.1 E F0 1.255
+(are `)3.755 F(`pinned')-.74 E 3.755('i)-.74 G 3.755(nm)215.435 172.8 S(emory)
+231.97 172.8 Q 3.755(,b)-.65 G 3.755(yd)268.125 172.8 S(ef)281.88 172.8 Q 1.256
+(ault, until the)-.1 F 3.756(ya)-.15 G 1.256(re returned to the pool using the)
+358.168 172.8 R F1(mpool_put)3.756 E F0(function.)108 184.8 Q .934
+(The function)108 201.6 R F1(mpool_cr)3.434 E(eate)-.37 E F0 .934
+(creates and initializes the memory pool identi\214ed by the)3.434 F F1(path)
+3.433 E F0(directory)3.433 E 5.933(.T)-.65 G(his)528.33 201.6 Q .931
+(directory must already e)108 213.6 R .931(xist when)-.15 F F1(mpool_cr)3.431 E
+(eate)-.37 E F0 .931(is called.)3.431 F .932
+(If the memory pool identi\214ed by)5.931 F F1(path)3.432 E F0(already)3.432 E
+-.15(ex)108 225.6 S .045(ists, then).15 F F1(mpool_cr)2.545 E(eate)-.37 E F0
+.045(returns success without further action.)2.545 F .045
+(The \214les associated with the memory pool)5.045 F .87
+(are created in the directory speci\214ed by)108 237.6 R F1(path)3.37 E F0 5.87
+(.\().28 G .87(The group of the created \214les is based on the system and)
+304.08 237.6 R .258(directory def)108 249.6 R .258
+(aults, and is not further speci\214ed by)-.1 F F1(mpool_cr)2.758 E(eate)-.37 E
+F0 2.758(.\) All).18 F .258(\214les created by)2.758 F F1(mpool_cr)2.758 E
+(eate)-.37 E F0 .258(are cre-)2.758 F .048(ated with mode)108 261.6 R F1(mode)
+2.548 E F0 .049(\(as described in)2.548 F F1 -.15(ch)2.549 G(mod).15 E F0 .049
+(\(2\)\) and modi\214ed by the process' umask v).77 F .049(alue \(see)-.25 F F1
+(umask)2.549 E F0(\(2\)\).).67 E(The)108 278.4 Q F1(cac)2.544 E(hesize)-.15 E
+F0(ar)2.544 E .044(gument speci\214es the size of the pool in bytes, and shoul\
+d be the size of the normal w)-.18 F(orking)-.1 E .509(set of the application \
+with some small amount of additional memory for unusual situations.)108 290.4 R
+.509(If the number)5.509 F .362(of bytes currently `)108 302.4 R(`pinned')-.74
+E 2.862('i)-.74 G 2.862(nm)226.828 302.4 S .362(emory e)242.47 302.4 R(xceeds)
+-.15 E F1(cac)2.861 E(hesize)-.15 E F0 2.861(,t).18 G(he)351.734 302.4 Q F1
+(db_mpool)2.861 E F0 .361(functions will attempt to allocate)2.861 F
+(more memory and do not necessarily f)108 314.4 Q(ail, although the)-.1 E 2.5
+(ym)-.15 G(ay suf)341.61 314.4 Q(fer performance de)-.25 E(gradation.)-.15 E
+(The)108 331.2 Q F1<8d61>2.5 E(gs)-.1 E F0(ar)2.5 E(gument is set by)-.18 E F1
+(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)272.73 331.2 S(he follo)281.34
+331.2 Q(wing v)-.25 E(alues:)-.25 E(MPOOL_PRIV)108 348 Q -1.11(AT)-1.35 G(E)
+1.11 E(The pool is not shared by other processes or threads, so no locking of \
+pool resources is required.)144 360 Q .115(The function)108 376.8 R F1
+(mpool_open)2.615 E F0 .115
+(returns a pointer to the memory pool identi\214ed by)2.615 F F1(path)2.615 E
+F0 2.615(,w).28 G .115(hich must ha)447.525 376.8 R .415 -.15(ve a)-.2 H
+(lready).15 E .036(been created by a call to)108 388.8 R F1(mpool_cr)2.536 E
+(eate)-.37 E F0 5.036(.T).18 G .036(he process must ha)276.074 388.8 R .336
+-.15(ve p)-.2 H .036(ermission to read and write \214les with o).15 F(wn-)-.25
+E 1.157(ers, groups and permissions as described for)108 400.8 R F1(mpool_cr)
+3.657 E(eate)-.37 E F0 6.157(.T).18 G(he)365.075 400.8 Q F1(mpool_open)3.657 E
+F0 1.157(function returns NULL on)3.657 F -.1(fa)108 412.8 S(ilure, setting).1
+E F1(errno)2.5 E F0(.).18 E(The)108 429.6 Q F1(mpool_close)6.383 E F0 3.883
+(function closes the pool indicated by the MPOOL pointer)6.383 F F1(mp)6.383 E
+F0 6.383(,a).19 G 6.382(sr)480.026 429.6 S 3.882(eturned by)493.628 429.6 R F1
+(mpool_open)108 441.6 Q F0 5.047(.T).24 G .047(his function does)171.337 441.6
+R/F2 10/Times-Bold@0 SF(not)2.547 E F0 .047(imply a call to)2.547 F F1
+(mpool_sync)2.547 E F0 .047(\(or to)2.547 F F1(mpool_fclose)2.547 E F0 2.547
+(\)i).18 G .047(.e. no pages are writ-)455.951 441.6 R .404
+(ten to the source \214le as as a result of calling)108 453.6 R F1(mpool_close)
+2.904 E F0 5.404(.T).18 G .404(he function)354.658 453.6 R F1(mpool_close)2.904
+E F0 .403(returns -1 on f)2.904 F(ailure,)-.1 E(setting)108 465.6 Q F1(errno)
+2.5 E F0 2.5(,a).18 G(nd 0 on success.)169.01 465.6 Q .827(The function)108
+482.4 R F1(mpool_fopen)3.327 E F0 .827(opens a \214le for b)3.327 F(uf)-.2 E
+.828(fering in the pool speci\214ed by the MPOOL ar)-.25 F 3.328(gument. The)
+-.18 F F1(path)108 494.4 Q F0(ar)2.85 E .349
+(gument is the name of the \214le to be opened.)-.18 F(The)5.349 E F1(pa)2.849
+E -.1(ge)-.1 G(size).1 E F0(ar)2.849 E .349
+(gument is the size, in bytes, of the unit)-.18 F .738(of transfer between the\
+ application and the pool, although not necessarily the unit of transfer betwe\
+en the)108 506.4 R .12(pool and the source \214le.)108 518.4 R .12
+(Applications not kno)5.12 F .12
+(wing the page size of the source \214le should retrie)-.25 F .42 -.15(ve t)
+-.25 H .12(he meta-).15 F .234(data from the \214le using a page size that is \
+correct for the metadata, then close and reopen the \214le, or)108 530.4 R
+2.735(,o)-.4 G(ther)521.32 530.4 Q(-)-.2 E
+(wise determine the page size before calling)108 542.4 Q F1(mpool_fopen)2.5 E
+F0(.).24 E .416(If the)108 559.2 R F1(pgin)2.916 E F0 .416(function is speci\
+\214ed, it is called each time a page is read into the memory pool from the so\
+urce)2.916 F 2.835(\214le. If)108 571.2 R(the)2.835 E F1(pgout)2.835 E F0 .336
+(function is speci\214ed, it is called each time a page is written to the sour\
+ce \214le.)2.835 F .336(Both func-)5.336 F .834
+(tions are called with the MPOOLFILE pointer returned from)108 583.2 R F1
+(mpool_fopen)3.333 E F0 3.333(,t).24 G .833(he page number)421.815 583.2 R
+3.333(,ap)-.4 G .833(ointer to)505.557 583.2 R .014
+(the page being read or written, and the ar)108 595.2 R(gument)-.18 E F1
+(pgcookie)2.515 E F0 5.015(.I).18 G 2.515(fe)351.695 595.2 S .015
+(ither function f)361.98 595.2 R .015(ails, it should return non-zero)-.1 F
+(and set)108 607.2 Q F1(errno)2.5 E F0 2.5(,i).18 G 2.5(nw)168.73 607.2 S
+(hich case the)183.45 607.2 Q F1(db_mpool)2.5 E F0
+(function calling it will also f)2.5 E(ail, lea)-.1 E(ving)-.2 E F1(errno)2.5 E
+F0(intact.)2.5 E(The)108 624 Q F1(mpool_fclose)2.705 E F0 .204
+(function closes the source \214le indicated by the MPOOLFILE pointer)2.705 F
+F1(mpf)2.704 E F0 5.204(.T)1.96 G .204(his function)492.296 624 R(does)108 636
+Q F2(not)3.615 E F0 1.115(imply a call to)3.615 F F1(mpool_sync)3.615 E F0
+3.615(,i).31 G 1.115
+(.e. no pages are written to the source \214le as as a result of calling)
+268.885 636 R F1(mpool_fclose)108 648 Q F0 5(.T).18 G(he function)175.12 648 Q
+F1(mpool_fclose)2.5 E F0(returns -1 on f)2.5 E(ailure, setting)-.1 E F1(errno)
+2.5 E F0 2.5(,a).18 G(nd 0 on success.)424.33 648 Q .019(The function)108 664.8
+R F1(mpool_g)2.519 E(et)-.1 E F0 .019
+(returns a pointer to the page with the page number speci\214ed by)2.519 F F1
+(pgnoaddr)2.518 E F0 2.518(,f).73 G .018(rom the)509.152 664.8 R .986
+(source \214le speci\214ed by the MPOOLFILE pointer)108 676.8 R F1(mpf)3.486 E
+F0 5.986(.I)1.96 G 3.486(ft)342.268 676.8 S .987(he page does not e)351.864
+676.8 R .987(xist or cannot be retrie)-.15 F -.15(ve)-.25 G(d,).15 E F1
+(mpool_g)108 688.8 Q(et)-.1 E F0(returns NULL and sets errno.)2.5 E(4.4 Berk)72
+732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F
+(1, 1995)2.5 E(2)535 732 Q EP
+%%Page: 3 15
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 110.12(DB_MPOOL\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 110.12(anual DB_MPOOL\(3\))340.17 48 R(The)108 84 Q/F1 10
+/Times-Italic@0 SF<8d61>2.5 E(gs)-.1 E F0(ar)2.5 E(gument is set by)-.18 E F1
+(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)272.73 84 S(he follo)281.34 84
+Q(wing v)-.25 E(alues:)-.25 E(MPOOL_CALLB)108 100.8 Q -.4(AC)-.35 G(K).4 E 1.04
+(After the page number has been determined, b)133 112.8 R 1.04(ut before an)-.2
+F 3.54(yo)-.15 G 1.04(ther process or thread can access the)388.26 112.8 R .471
+(page, the function speci\214ed by the)133 124.8 R F1(callbac)2.971 E(k)-.2 E
+F0(ar)2.971 E .471(gument is called.)-.18 F .471(If the function f)5.471 F .472
+(ails, it should return)-.1 F 1.11(non-zero and set)133 136.8 R F1(errno)3.61 E
+F0 3.61(,i).18 G 3.61(nw)236.21 136.8 S 1.11(hich case)252.04 136.8 R F1
+(mpool_g)3.61 E(et)-.1 E F0 1.11(will also f)3.61 F 1.11(ail, lea)-.1 F(ving)
+-.2 E F1(errno)3.61 E F0 3.61(intact. The)3.61 F F1(callbac)3.61 E(k)-.2 E F0
+1.012(function is called with the MPOOLFILE pointer returned from)133 148.8 R
+F1(mpool_fopen)3.512 E F0 1.013(and the page number)3.513 F(.)-.55 E .228
+(This functionality is commonly used when page locking is required, b)133 160.8
+R .227(ut the page number of the page)-.2 F(being retrie)133 172.8 Q -.15(ve)
+-.25 G 2.5(di).15 G 2.5(sn)198.14 172.8 S(ot kno)209.53 172.8 Q(wn.)-.25 E
+(MPOOL_CREA)108 189.6 Q(TE)-1.11 E(If the speci\214ed page does not e)133 201.6
+Q(xist, create it.)-.15 E(MPOOL_LAST)108 218.4 Q 2.105
+(Return the last page of the source \214le and cop)133 230.4 R 4.605(yi)-.1 G
+2.106(ts page number to the location referenced by)347.25 230.4 R F1(pgnoaddr)
+133 242.4 Q F0(.).73 E(MPOOL_NEW)108 259.2 Q(Create a ne)133 271.2 Q 2.5(wp)
+-.25 G(age in the \214le and cop)192.45 271.2 Q 2.5(yi)-.1 G
+(ts page number to the location referenced by)290.67 271.2 Q F1(pgnoaddr)2.5 E
+F0(.).73 E(MPOOL_NOPIN)108 288 Q(Don')133 300 Q 2.918(tp)-.18 G .418
+(in the page into memory)164.068 300 R 5.418(.\()-.65 G .417
+(This \215ag is intended for deb)274.108 300 R .417(ugging purposes, when it')
+-.2 F 2.917(so)-.55 G .417(ften use-)504.873 300 R .972(ful to e)133 312 R .972
+(xamine pages which are currently held by other parts of the application.)-.15
+F -.15(Pa)5.973 G .973(ges retrie).15 F -.15(ve)-.25 G 3.473(di).15 G(n)535 312
+Q .529(this manner don')133 324 R 3.029(tn)-.18 G .528
+(eed to be returned to the memory pool, i.e. the)212.457 324 R 3.028(ys)-.15 G
+(hould)413.95 324 Q/F2 10/Times-Bold@0 SF(not)3.028 E F0 .528
+(be speci\214ed as ar)3.028 F(gu-)-.18 E(ments to the)133 336 Q F1(mpool_put)
+2.5 E F0(routine.\))2.5 E(Created pages ha)108 352.8 Q .3 -.15(ve a)-.2 H
+(ll their bytes set to 0.).15 E 2.078(All pages returned by)108 369.6 R F1
+(mpool_g)4.578 E(et)-.1 E F0 2.079
+(\(unless the MPOOL_NOPIN \215ag is speci\214ed\), will be retained \(i.e.)
+4.578 F -.74(``)108 381.6 S(pinned').74 E
+('\) in the pool until a subsequent call to)-.74 E F1(mpool_put)2.5 E F0(.).68
+E .077(The function)108 398.4 R F1(mpool_put)2.577 E F0 .076
+(indicates that the page referenced by)2.577 F F1(pgaddr)2.576 E F0 .076
+(can be e)2.576 F .076(victed from the pool.)-.25 F F1(Pgaddr)5.076 E F0
+(must be an address pre)108 410.4 Q(viously returned by)-.25 E F1(mpool_g)2.5 E
+(et)-.1 E F0(.).68 E(The \215ag v)108 427.2 Q(alue is speci\214ed by)-.25 E F1
+(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)277.2 427.2 S(he follo)285.81
+427.2 Q(wing v)-.25 E(alues:)-.25 E(MPOOL_DIR)108 444 Q(TY)-.6 E .052(The page\
+ has been modi\214ed and must be written to the source \214le before being e)
+133 456 R .052(victed from the pool.)-.25 F(MPOOL_DISCARD)108 472.8 Q .145
+(The page is unlik)133 484.8 R .144(ely to be useful in the near future, and s\
+hould be discarded before other pages in the)-.1 F(pool.)133 496.8 Q
+(The function)108 513.6 Q F1(mpool_put)2.5 E F0(returns -1 on f)2.5 E
+(ailure, setting)-.1 E F1(errno)2.5 E F0 2.5(,a).18 G(nd 0 on success.)352.77
+513.6 Q .027(The function)108 530.4 R F1(mpool_sync)2.527 E F0 .028
+(writes all pages associated with the MPOOLFILE pointer)2.528 F F1(mpf)2.528 E
+F0 2.528(,w)1.96 G .028(hich were speci-)474.414 530.4 R .431(\214ed as ar)108
+542.4 R .431(guments to the)-.18 F F1(mpool_put)2.931 E F0 .431
+(function with an associated \215ag of MPOOL_DIR)2.931 F(TY)-.6 E 2.93(,t)-1.29
+G 2.93(ot)472.61 542.4 S .43(he source \214le.)483.32 542.4 R(The function)108
+554.4 Q F1(mpool_sync)2.5 E F0(returns -1 on f)2.5 E(ailure, setting)-.1 E F1
+(errno)2.5 E F0 2.5(,a).18 G(nd 0 on success.)357.76 554.4 Q 1.075
+(The function)108 571.2 R F1(mpool_unlink)3.575 E F0(destro)3.575 E 1.075
+(ys the memory pool identi\214ed by the directory)-.1 F F1(path)3.575 E F0
+3.575(,r).28 G(emo)471.33 571.2 Q 1.075(ving all \214les)-.15 F 1.121
+(used to implement the memory pool.)108 583.2 R 1.121(\(The directory)6.121 F
+F1(path)3.621 E F0 1.121(is not remo)3.621 F -.15(ve)-.15 G 3.62(d.\) If).15 F
+1.12(there are processes which)3.62 F(ha)108 595.2 Q .871 -.15(ve c)-.2 H
+(alled).15 E F1(mpool_open)3.071 E F0 .571(without calling)3.071 F F1
+(mpool_close)3.071 E F0 .572
+(\(i.e., there are processes currently using the memory)3.071 F(pool\),)108
+607.2 Q F1(mpool_unlink)2.652 E F0 .152(will f)2.652 F .151
+(ail without further action, unless the force \215ag is set, in which case)-.1
+F F1(mpool_unlink)2.651 E F0 .524
+(will attempt to delete the memory pool \214les re)108 619.2 R -.05(ga)-.15 G
+.525(rdless of an).05 F 3.025(yp)-.15 G .525
+(rocesses still using the memory pool.)366.45 619.2 R(An)5.525 E(y)-.15 E .598
+(accesses to a remo)108 631.2 R -.15(ve)-.15 G 3.097(dm).15 G .597
+(emory pool will lik)208.95 631.2 R .597(ely result in une)-.1 F .597
+(xpected beha)-.15 F(vior)-.2 E 5.597(.T)-.55 G .597(he function)436.036 631.2
+R F1(mpool_unlink)3.097 E F0(returns -1 on f)108 643.2 Q(ailure, setting)-.1 E
+F1(errno)2.5 E F0 2.5(,a).18 G(nd 0 on success.)253.61 643.2 Q .11
+(In the case of catastrophic or system f)108 660 R .11
+(ailure, it is possible to clean up a memory pool by remo)-.1 F .11
+(ving all of the)-.15 F .569(\214les in the directory speci\214ed to the)108
+672 R F1(mpool_cr)3.068 E(eate)-.37 E F0 .568
+(function, as memory pool \214les are ne)3.068 F -.15(ve)-.25 G 3.068(rc).15 G
+.568(reated in an)487.364 672 R(y)-.15 E
+(directory other than the one speci\214ed to)108 684 Q F1(mpool_cr)2.5 E(eate)
+-.37 E F0(.).18 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q
+99.315(ution August)-.2 F(1, 1995)2.5 E(3)535 732 Q EP
+%%Page: 4 16
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 110.12(DB_MPOOL\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 110.12(anual DB_MPOOL\(3\))340.17 48 R .025(The function)108 84 R/F1
+10/Times-Italic@0 SF(mpool_stat)2.525 E F0 .026
+(writes statistics for the memory pool)2.526 F F1(mp)2.526 E F0 .026
+(to the \214le speci\214ed by)2.526 F F1(fp)2.526 E F0 5.026(.T).19 G .026
+(hese statistics)485.254 84 R .829
+(include the number of \214les participating in the pool, the acti)108 96 R
+1.129 -.15(ve p)-.25 H .829(ages in the pool, and numbers as to ho).15 F(w)-.25
+E(ef)108 108 Q(fecti)-.25 E .3 -.15(ve t)-.25 H(he cache has been.).15 E/F2 9
+/Times-Bold@0 SF(ERR)72 124.8 Q(ORS)-.27 E F0(The)108 136.8 Q F1(mpool_cr)3.852
+E(eate)-.37 E F0(,).18 E F1(mpool_open)3.852 E F0(and)3.852 E F1(mpool_fopen)
+3.852 E F0 1.353(functions may f)3.852 F 1.353(ail and set)-.1 F F1(errno)3.853
+E F0 1.353(for an)3.853 F 3.853(yo)-.15 G 3.853(ft)493.424 136.8 S 1.353
+(he errors)503.387 136.8 R(speci\214ed for the library functions)108 148.8 Q F1
+(open)2.5 E F0(\(2\),).24 E F1 -.37(re)2.5 G(ad).37 E F0(\(2\), and).77 E F1
+(malloc)2.5 E F0(\(3\).).31 E(The)108 165.6 Q F1(mpool_close)3.144 E F0(and)
+3.144 E F1(mpool_fclose)3.144 E F0 .644(functions may f)3.144 F .644
+(ail and set)-.1 F F1(errno)3.144 E F0 .643(for an)3.143 F 3.143(yo)-.15 G
+3.143(ft)425.985 165.6 S .643(he errors speci\214ed for the)435.238 165.6 R
+(library functions)108 177.6 Q F1(close)2.5 E F0(\(2\) and).18 E F1(fr)2.5 E
+(ee)-.37 E F0(\(3\).).18 E(The)108 194.4 Q F1(mpool_g)4.097 E(et)-.1 E F0 1.597
+(function may f)4.097 F 1.597(ail and set)-.1 F F1(errno)4.097 E F0 1.597
+(for an)4.097 F 4.097(yo)-.15 G 4.097(ft)349.14 194.4 S 1.597
+(he errors speci\214ed for the library functions)359.347 194.4 R F1 -.37(re)108
+206.4 S(ad).37 E F0(\(2\),).77 E F1(write)2.5 E F0(\(2\), and).18 E F1(malloc)
+2.5 E F0(\(3\) or the follo).31 E(wing:)-.25 E([EINV)108 223.2 Q(AL])-1.35 E
+(The requested page does not e)133 235.2 Q(xist and MPOOL_CREA)-.15 E(TE w)
+-1.11 E(as not set.)-.1 E(The)108 252 Q F1(mpool_put)4.288 E F0 1.787
+(function may f)4.287 F 1.787(ail and set)-.1 F F1(errno)4.287 E F0 1.787
+(for an)4.287 F 4.287(yo)-.15 G 4.287(ft)351.701 252 S 1.787
+(he errors speci\214ed for the library function)362.098 252 R F1(write)108 264
+Q F0(\(2\) or the follo).18 E(wing:)-.25 E([EA)108 280.8 Q(CCES])-.4 E
+(The source \214le w)133 292.8 Q(as not opened for writing.)-.1 E(The)108 309.6
+Q F1(mpool_sync)3.993 E F0 1.493(function may f)3.993 F 1.493(ail and set)-.1 F
+F1(errno)3.993 E F0 1.494(for an)3.993 F 3.994(yo)-.15 G 3.994(ft)353.752 309.6
+S 1.494(he errors speci\214ed for the library function)363.856 309.6 R F1
+(write)108 321.6 Q F0(\(2\).).18 E(The)108 338.4 Q F1(mpool_unlink)3.569 E F0
+1.069(function may f)3.569 F 1.068(ail and set)-.1 F F1(errno)3.568 E F0 1.068
+(for an)3.568 F 3.568(yo)-.15 G 3.568(ft)356.734 338.4 S 1.068
+(he errors speci\214ed for the library function)366.412 338.4 R F1(unlink)108
+350.4 Q F0(\(2\) or the follo).67 E(wing:)-.25 E([EB)108 367.2 Q(USY])-.1 E
+(The memory pool w)133 379.2 Q(as in use and the force \215ag w)-.1 E
+(as not set.)-.1 E F2(SEE ALSO)72 396 Q F1(db_btr)108 408 Q(ee)-.37 E F0
+(\(3\),).18 E F1(db_hash)2.5 E F0(\(3\),).28 E F1(db_loc)2.5 E(k)-.2 E F0
+(\(3\),).67 E F1(db_lo)2.5 E(g)-.1 E F0(\(3\),).22 E F1(db_open)2.5 E F0
+(\(3\),).24 E F1(db_r)2.5 E(ecno)-.37 E F0(\(3\),).18 E F1(db_txn)2.5 E F0
+(\(3\)).24 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q
+99.315(ution August)-.2 F(1, 1995)2.5 E(4)535 732 Q EP
+%%Page: 1 17
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 119.01(DB_OPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 119.01(anual DB_OPEN\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)
+72 84 S(ME).18 E F0(db_open \255 database access methods)108 96 Q F1(SYNOPSIS)
+72 112.8 Q/F2 10/Times-Bold@0 SF(#include <db)108 124.8 Q(.h>)-.4 E(DB *)108
+148.8 Q(db_open\(const char *\214le, int \215ags, int mode,)108 160.8 Q
+(DBTYPE type, DBINFO *dbinf)158 172.8 Q(o, const v)-.25 E(oid *openinf)-.1 E
+(o\);)-.25 E F1(DESCRIPTION)72 189.6 Q F0 .485(The DB library is a f)108 201.6
+R .485(amily of groups of functions that pro)-.1 F .486
+(vides a modular programming interf)-.15 F .486(ace to trans-)-.1 F .823
+(actions and record-oriented \214le access.)108 213.6 R .822
+(The library includes support for transaction, locking, logging and)5.822 F
+.258(\214le b)108 225.6 R(uf)-.2 E .258(fering functionality)-.25 F 2.758(,a)
+-.65 G 2.758(sw)223.214 225.6 S .258(ell as v)237.082 225.6 R .258(arious inde)
+-.25 F -.15(xe)-.15 G 2.758(da).15 G .258(ccess methods.)331.434 225.6 R(Man)
+5.258 E 2.758(yo)-.15 G 2.758(ft)427.878 225.6 S .258
+(he functional groups \(e.g.)436.746 225.6 R .528(the memory pool functions\) \
+are useful independently of the rest of the DB functions, although some func-)
+108 237.6 R .306(tional groups are e)108 249.6 R .306
+(xplicitly based on other functional groups \(e.g.)-.15 F .306
+(transactions and logging\).)5.306 F -.15(Fo)5.306 G 2.806(rag).15 G(eneral)
+515.57 249.6 Q .245(description of transactions, see)108 261.6 R/F3 10
+/Times-Italic@0 SF(db_txn)2.745 E F0 2.745(\(3\). F).24 F .245
+(or a general description of the access methods, see)-.15 F F3(db_open)2.745 E
+F0(\(3\)).24 E .307(and then the indi)108 273.6 R .307
+(vidual access method manual pages:)-.25 F F3(db_btr)2.808 E(ee)-.37 E F0
+(\(3\),).18 E F3(db_hash)2.808 E F0(\(3\),).28 E F3(db_lo)2.808 E(g)-.1 E F0
+.308(\(3\) and).22 F F3(db_r)2.808 E(ecno)-.37 E F0(\(3\).).18 E -.15(Fo)108
+285.6 S 3.635(rag).15 G 1.135(eneral description of the lock manager)138.45
+285.6 R 3.635(,s)-.4 G(ee)307.32 285.6 Q F3(db_loc)3.635 E(k)-.2 E F0 3.635
+(\(3\). F).67 F 1.135(or a general description of the memory)-.15 F
+(pool manager)108 297.6 Q 2.5(,s)-.4 G(ee)171.2 297.6 Q F3(db_mpool)2.5 E F0
+(\(3\).).51 E(This manual page describes the o)108 314.4 Q -.15(ve)-.15 G
+(rall structure of the a).15 E -.25(va)-.2 G(ilable access methods.).25 E .457
+(The currently supported \214le formats are btree, hashed, log and recno \(i.e\
+. \215at-\214le oriented\).)108 331.2 R .457(The btree for)5.457 F(-)-.2 E .974
+(mat is a representation of a sorted, balanced tree structure.)108 343.2 R .973
+(The hashed format is an e)5.974 F .973(xtensible, dynamic)-.15 F .801
+(hashing scheme.)108 355.2 R .802
+(The log format is a general-purpose logging f)5.801 F(acility)-.1 E 5.802(.T)
+-.65 G .802(he recno format is a byte stream)406.888 355.2 R .415
+(\214le with \214x)108 367.2 R .415(ed or v)-.15 F .415
+(ariable length records.)-.25 F .415(The formats and other)5.415 F 2.914(,f)-.4
+G .414(ormat speci\214c information are described)376.714 367.2 R
+(in detail in their respecti)108 379.2 Q .3 -.15(ve m)-.25 H(anual pages:).15 E
+F3(db_btr)2.5 E(ee)-.37 E F0(\(3\),).18 E F3(db_hash)2.5 E F0(\(3\),).28 E F3
+(db_lo)2.5 E(g)-.1 E F0(\(3\), and).22 E F3(db_r)2.5 E(ecno)-.37 E F0(\(3\).)
+.18 E .138(Db_open opens)108 396 R F3(\214le)2.638 E F0 .139
+(for reading and/or writing.)2.638 F .139(Files ne)5.139 F -.15(ve)-.25 G 2.639
+(ri).15 G .139(ntended to be preserv)349.088 396 R .139
+(ed on disk may be created)-.15 F .423
+(by setting the \214le parameter to NULL.)108 408 R .423
+(\(Note, while most of the access methods use)5.423 F F3(\214le)2.923 E F0 .423
+(as the name of an)2.923 F .429
+(underlying \214le on disk, this is not guaranteed.)108 420 R .43
+(See the manual pages for the indi)5.429 F .43(vidual access methods for)-.25 F
+(more information.\))108 432 Q(The)108 448.8 Q F3<8d61>4.328 E(gs)-.1 E F0(and)
+4.328 E F3 1.828(mode ar)4.328 F(guments)-.37 E F0 1.828
+(are as speci\214ed to the)4.328 F F3(open)4.328 E F0 1.828(\(2\) function, ho)
+.24 F(we)-.25 E -.15(ve)-.25 G 2.628 -.4(r, o).15 H 1.828(nly the O_CREA).4 F
+-.74(T,)-1.11 G .127(O_EXCL, O_EXLOCK, O_NONBLOCK, O_RDONL)108 460.8 R 2.708
+-1.29(Y, O)-1 H(_RD)1.29 E .128(WR, O_SHLOCK and O_TR)-.3 F .128
+(UNC \215ags are)-.4 F 2.5(meaningful. \(Note,)108 472.8 R
+(opening a database \214le O_WR)2.5 E(ONL)-.4 E 2.5(Yi)-1 G 2.5(sn)342.67 472.8
+S(ot possible.\))354.06 472.8 Q(The)108 489.6 Q F3(type)5.338 E F0(ar)5.338 E
+2.837(gument is of type DBTYPE \(as de\214ned in the <db)-.18 F 2.837
+(.h> include \214le\) and may be set to)-.4 F
+(DB_BTREE, DB_HASH, DB_LOG or DB_RECNO.)108 501.6 Q(The)108 518.4 Q F3(dbinfo)
+3.279 E F0(ar)3.279 E .779(gument is a pointer to a structure containing refer\
+ences to locking, logging, transaction, and)-.18 F 1.242(shared-memory b)108
+530.4 R(uf)-.2 E 1.242(fer pool information.)-.25 F(If)6.242 E F3(dbinfo)3.742
+E F0 1.241(is NULL, then the access method may still use these)3.741 F .667
+(subsystems, b)108 542.4 R .667(ut the usage will be pri)-.2 F -.25(va)-.25 G
+.668(te to the application and managed by DB.).25 F(If)5.668 E F3(dbinfo)3.168
+E F0 .668(is non-NULL,)3.168 F .481(then the module referenced by each of the \
+non-NULL \214elds is used by DB as necessary)108 554.4 R 5.48(.T)-.65 G .48
+(he \214elds of the)479.4 554.4 R(DBINFO structure are de\214ned as follo)108
+566.4 Q(ws:)-.25 E(const char *errpfx;)108 583.2 Q 2.5(Ap)133 595.2 S
+(re\214x to prepend to error messages; used only if)147.72 595.2 Q F3
+(err\214le)2.5 E F0(is non-NULL.)2.5 E(FILE *err\214le;)108 612 Q(The)133 624 Q
+F3(stdio)2.5 E F0(\(3\) \214le stream to which error messages are logged.).18 E
+.147(When an)133 648 R 2.647(ye)-.15 G .147(rror occurs in the)180.904 648 R F3
+(db_open)2.648 E F0 .148(function, or in an)2.648 F 2.648(yf)-.15 G .148
+(unction called using a \214eld of the returned)369.824 648 R .234
+(DB structure, an error v)133 660 R .234
+(alue is returned by the function, and the global v)-.25 F(ariable)-.25 E F3
+(errno)2.733 E F0 .233(is set appropri-)2.733 F(ately)133 672 Q 5.415(.I)-.65 G
+2.915(ns)163.035 672 S .416(ome cases, ho)174.84 672 R(we)-.25 E -.15(ve)-.25 G
+1.216 -.4(r, t).15 H(he).4 E F3(errno)2.916 E F0 -.25(va)2.916 G .416
+(lue may be insuf).25 F .416(\214cient to describe the cause of the error)-.25
+F(.)-.55 E .137(In these cases, if)133 684 R F3(err\214le)2.637 E F0 .137(is n\
+on-NULL, additional error information will be written to the \214le stream it)
+2.637 F(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315
+(ution August)-.2 F(1, 1995)2.5 E(1)535 732 Q EP
+%%Page: 2 18
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 119.01(DB_OPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 119.01(anual DB_OPEN\(3\))340.17 48 R .643
+(represents, preceded by the string, if an)133 84 R 1.943 -.65(y, s)-.15 H .643
+(peci\214ed by).65 F/F1 10/Times-Italic@0 SF(errpfx)3.143 E F0 5.643(.T).53 G
+.644(his error logging f)394.94 84 R .644(acility should not)-.1 F
+(be required for normal operation, b)133 96 Q(ut may be useful in deb)-.2 E
+(ugging applications.)-.2 E(char *errb)108 112.8 Q(uf;)-.2 E .03(The b)133
+124.8 R(uf)-.2 E .03(fer to which error messages are copied.)-.25 F .029
+(If non-NULL,)5.029 F F1(errb)2.529 E(uf)-.2 E F0(beha)2.529 E -.15(ve)-.2 G
+2.529(sa).15 G 2.529(sd)451.423 124.8 S .029(escribed for)462.842 124.8 R F1
+(err\214le)2.529 E F0(,).18 E -.15(ex)133 136.8 S .173(cept that the).15 F F1
+(errpfx)2.673 E F0 .174
+(\214eld is ignored and the error message is copied into the speci\214ed b)
+2.673 F(uf)-.2 E .174(fer instead)-.25 F 1.014
+(of being written to the FILE stream.)133 148.8 R 1.013
+(The DB routines assume that the associated b)6.014 F(uf)-.2 E 1.013
+(fer is at least)-.25 F(1024 bytes in length.)133 160.8 Q(LOCK_T)108 177.6 Q
+(ABLE_T *lockinfo;)-.93 E .265
+(If locking is required for the \214le being opened \(as in the case of b)133
+189.6 R(uf)-.2 E .266(fers being maintained in a shared)-.25 F 1.794(memory b)
+133 201.6 R(uf)-.2 E 1.794(fer pool\), the)-.25 F F1(loc)4.294 E(kinfo)-.2 E F0
+1.794(\214eld contains a return v)4.294 F 1.793(alue from the function)-.25 F
+F1(loc)4.293 E(k_open)-.2 E F0(that)4.293 E(should be used \(see)133 213.6 Q F1
+(db_loc)2.5 E(k)-.2 E F0 2.5(\(3\)\). If).67 F F1(loc)2.5 E(kinfo)-.2 E F0
+(is NULL, no locking is done.)2.5 E(DB *loginfo;)108 230.4 Q .93
+(If modi\214cations to the \214le being opened should be logged, the)133 242.4
+R F1(lo)3.43 E(ginfo)-.1 E F0 .93(\214eld contains a return v)3.43 F(alue)-.25
+E .063(from the function)133 254.4 R F1(dbopen)2.563 E F0 2.563(,w).24 G .062
+(hen opening a DB \214le of type DB_LOG.)247.642 254.4 R(If)5.062 E F1(lo)2.562
+E(ginfo)-.1 E F0 .062(is NULL, no logging)2.562 F(is done.)133 266.4 Q
+(MPOOL *mpoolinfo;)108 283.2 Q 1.129
+(If the cache for the \214le being opened should be maintained in a shared b)
+133 295.2 R(uf)-.2 E 1.129(fer pool, the)-.25 F F1(mpoolinfo)3.629 E F0 .102
+(\214eld contains a return v)133 307.2 R .102(alue from the function)-.25 F F1
+(mpool_open)2.602 E F0 .102(that should be used \(see)2.602 F F1(db_mpool)2.602
+E F0 2.602(\(3\)\). If).51 F F1(mpoolinfo)133 319.2 Q F0 .429
+(is NULL, a memory pool may still be created, b)2.929 F .43(ut it will be pri)
+-.2 F -.25(va)-.25 G .43(te to the application and).25 F(managed by DB.)133
+331.2 Q(TXNMGR *txninfo;)108 348 Q 1.161
+(If the accesses to the \214le being opened should tak)133 360 R 3.661(ep)-.1 G
+1.161(lace in the conte)354.474 360 R 1.161(xt of transactions \(pro)-.15 F
+(viding)-.15 E 1.239(atomicity and complete error reco)133 372 R -.15(ve)-.15 G
+1.239(ry\), the).15 F F1(txninfo)3.739 E F0 1.239(\214eld contains a return v)
+3.739 F 1.24(alue from the function)-.25 F F1(txn_open)133 384 Q F0(\(see)2.599
+E F1(db_txn)2.599 E F0 2.599(\(3\)\). If).24 F .098
+(transactions are speci\214ed, the application is responsible for making suit-)
+2.599 F 1.27(able calls to)133 396 R F1(txn_be)3.77 E(gin)-.4 E F0(,).24 E F1
+(txn_abort)3.77 E F0 3.77(,a).68 G(nd)282.91 396 Q F1(txn_commit)3.77 E F0 6.27
+(.I).68 G(f)356.12 396 Q F1(txninfo)3.77 E F0 1.27
+(is NULL, no transaction support is)3.77 F(done.)133 408 Q(The)108 424.8 Q F1
+(openinfo)2.85 E F0(ar)2.85 E .349(gument is a pointer to an access method spe\
+ci\214c structure described in the access method')-.18 F(s)-.55 E .03
+(manual page.)108 436.8 R(If)5.03 E F1(openinfo)2.53 E F0 .031
+(is NULL, each access method will use def)2.53 F .031
+(aults appropriate for the system and the)-.1 F(access method.)108 448.8 Q/F2 9
+/Times-Bold@0 SF(KEY/D)72 465.6 Q -1.35 -.855(AT A)-.315 H -.666(PA)3.105 G
+(IRS).666 E F0 .313(Access to all access methods is based on k)108 477.6 R -.15
+(ey)-.1 G .312(/data pairs.).15 F .312(Both k)5.312 F -.15(ey)-.1 G 2.812(sa)
+.15 G .312(nd data are represented by the follo)386.758 477.6 R(w-)-.25 E
+(ing data structure:)108 489.6 Q(typedef struct {)108 506.4 Q -.2(vo)144 518.4
+S(id *data;).2 E(size_t size;)144 530.4 Q 2.5(}D)108 542.4 S(BT)122.52 542.4 Q
+(;)-.55 E(The elements of the DBT structure are de\214ned as follo)108 559.2 Q
+(ws:)-.25 E 5.84(data A)108 576 R(pointer to a byte string.)2.5 E 6.95
+(size The)108 592.8 R(length of)2.5 E F1(data)2.5 E F0 2.5(,i).26 G 2.5(nb)
+215.2 592.8 S(ytes.)227.7 592.8 Q -2.15 -.25(Ke y)108 609.6 T .672(and data by\
+te strings may reference strings of essentially unlimited length, although an)
+3.422 F 3.173(yt)-.15 G .873 -.1(wo o)493.204 609.6 T 3.173(ft).1 G(hem)522.78
+609.6 Q(must \214t into a)108 621.6 Q -.25(va)-.2 G
+(ilable memory at the same time.).25 E .14(The access methods pro)108 638.4 R
+.139(vide no guarantees about byte string alignment, and applications are resp\
+onsible for)-.15 F(maintaining an)108 650.4 Q 2.5(yn)-.15 G
+(ecessary alignment.)180.07 650.4 Q F2(DB OPERA)72 667.2 Q(TIONS)-.855 E F1
+(Db_open)108 679.2 Q F0 .56
+(returns a pointer to a DB structure \(as de\214ned in the <db)3.06 F .56
+(.h> include \214le\) on success, and NULL)-.4 F 1.02(on error)108 691.2 R 6.02
+(.T)-.55 G 1.02(he DB structure describes a database type, and includes a set \
+of functions to perform v)155.03 691.2 R(arious)-.25 E(4.4 Berk)72 732 Q(ele)
+-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E
+(2)535 732 Q EP
+%%Page: 3 19
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 119.01(DB_OPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 119.01(anual DB_OPEN\(3\))340.17 48 R .241
+(actions, as described belo)108 84 R 4.041 -.65(w. E)-.25 H .241
+(ach of these functions tak).65 F .241
+(es a pointer to a DB structure, and may tak)-.1 F 2.741(eo)-.1 G .242(ne or)
+519.488 84 R .889(more DBT *')108 96 R 3.389(sa)-.55 G .889(nd a \215ag v)
+174.827 96 R .889(alue as well.)-.25 F(Indi)5.889 E .888
+(vidual access methods specify additional functions and \215ags)-.25 F
+(which are speci\214c to the method.)108 108 Q
+(The \214elds of the DB structure are as follo)5 E(ws:)-.25 E(DBTYPE type;)108
+124.8 Q(The type of the underlying access method \(and \214le format\).)133
+136.8 Q(int \(*close\)\(const DB *db\);)108 153.6 Q 3.863(Ap)133 165.6 S 1.363
+(ointer to a function to \215ush an)149.083 165.6 R 3.864(yc)-.15 G 1.364
+(ached information to disk, free an)290.968 165.6 R 3.864(ya)-.15 G 1.364
+(llocated resources, and)445.912 165.6 R .878(close an)133 177.6 R 3.378(yu)
+-.15 G .878(nderlying \214les.)179.596 177.6 R .878(Since k)5.878 F -.15(ey)-.1
+G .878(/data pairs are cached in memory).15 F 3.377(,f)-.65 G .877
+(ailing to sync the \214le with)431.445 177.6 R(the)133 189.6 Q/F1 10
+/Times-Italic@0 SF(close)2.5 E F0(or)2.5 E F1(sync)2.5 E F0
+(function may result in inconsistent or lost information.)2.5 E(The)133 206.4 Q
+F1(close)2.5 E F0(functions return -1 on f)2.5 E(ailure, setting)-.1 E F1
+(errno)2.5 E F0 2.5(,a).18 G(nd 0 on success.)355.54 206.4 Q
+(int \(*del\)\(const DB *db, TXN *txnid,)108 223.2 Q(const DBT *k)183 235.2 Q
+-.15(ey)-.1 G 2.5(,u)-.5 G(_int \215ags\);)257.65 235.2 Q 2.541(Ap)133 247.2 S
+.041(ointer to a function to remo)147.761 247.2 R .341 -.15(ve k)-.15 H -.15
+(ey).05 G .041(/data pairs from the database.).15 F .042(The k)5.041 F -.15(ey)
+-.1 G .042(/data pair associated with).15 F(the speci\214ed)133 259.2 Q F1 -.1
+(ke)2.5 G(y)-.2 E F0(are discarded from the database.)2.5 E(The)133 276 Q F1
+(txnid)3.317 E F0 .817(parameter contains a transaction ID returned from)3.317
+F F1(txn_be)3.317 E(gin)-.4 E F0 3.317(,i).24 G 3.316(ft)431.22 276 S .816
+(he \214le is being accessed)440.646 276 R
+(under transaction protection, or NULL if transactions are not in ef)133 288 Q
+(fect.)-.25 E(The parameter)133 304.8 Q F1<8d61>2.5 E(g)-.1 E F0
+(must be set to 0 or e)2.5 E(xactly one of the follo)-.15 E(wing v)-.25 E
+(alues:)-.25 E(R_CURSOR)133 321.6 Q(Delete the record referenced by the cursor)
+158 333.6 Q 5(.T)-.55 G(he cursor must ha)339.32 333.6 Q .3 -.15(ve p)-.2 H(re)
+.15 E(viously been initialized.)-.25 E(The)133 350.4 Q F1(delete)2.934 E F0
+.434(functions return -1 on error)2.934 F 2.934(,s)-.4 G(etting)297.818 350.4 Q
+F1(errno)2.934 E F0 2.934(,0o).18 G 2.934(ns)364.3 350.4 S .434
+(uccess, and 1 if the speci\214ed)376.124 350.4 R F1 -.1(ke)2.935 G(y)-.2 E F0
+.435(did not)2.935 F -.15(ex)133 362.4 S(ist in the \214le.).15 E
+(int \(*fd\)\(const DB *db\);)108 379.2 Q 3.351(Ap)133 391.2 S .851
+(ointer to a function which returns a \214le descriptor representati)148.571
+391.2 R 1.15 -.15(ve o)-.25 H 3.35(ft).15 G .85(he underlying database.)430.53
+391.2 R(A)5.85 E .338(\214le descriptor referencing the same \214le will be re\
+turned to all processes which call)133 403.2 R F1(db_open)2.838 E F0 .339
+(with the)2.839 F(same)133 415.2 Q F1(\214le)3.376 E F0 3.376(name. This)3.376
+F .876(\214le descriptor may be safely used as an ar)3.376 F .876
+(gument to the)-.18 F F1(fcntl)3.376 E F0 .875(\(2\) and).51 F F1(\215oc)3.375
+E(k)-.2 E F0(\(2\)).67 E .99(locking functions.)133 427.2 R .99
+(The \214le descriptor is not necessarily associated with an)5.99 F 3.49(yo)
+-.15 G 3.49(ft)453.98 427.2 S .99(he underlying \214les)463.58 427.2 R
+(used by the access method.)133 439.2 Q(No \214le descriptor is a)5 E -.25(va)
+-.2 G(ilable for in memory databases.).25 E(The)133 456 Q F1(fd)2.5 E F0
+(functions return -1 on error)2.5 E 2.5(,s)-.4 G(etting)278.68 456 Q F1(errno)
+2.5 E F0 2.5(,a).18 G(nd the \214le descriptor on success.)335.8 456 Q
+(int \(*get\)\(const DB *db, TXN *txnid,)108 472.8 Q(const DBT *k)183 484.8 Q
+-.15(ey)-.1 G 2.5(,D)-.5 G(BT *data, u_int \215ags\);)259.87 484.8 Q 2.854(Ap)
+133 496.8 S .354(ointer to a function which is the interf)148.074 496.8 R .354
+(ace for k)-.1 F -.15(ey)-.1 G .353(ed retrie).15 F -.25(va)-.25 G 2.853(lf).25
+G .353(rom the database.)397.995 496.8 R .353(The address and)5.353 F
+(length of the data associated with the speci\214ed)133 508.8 Q F1 -.1(ke)2.5 G
+(y)-.2 E F0(are returned in the structure referenced by)2.5 E F1(data)2.5 E F0
+(.).26 E(The)133 525.6 Q F1(txnid)3.316 E F0 .816
+(parameter contains a transaction ID returned from)3.316 F F1(txn_be)3.317 E
+(gin)-.4 E F0 3.317(,i).24 G 3.317(ft)431.215 525.6 S .817
+(he \214le is being accessed)440.642 525.6 R
+(under transaction protection, or NULL if transactions are not in ef)133 537.6
+Q(fect.)-.25 E(The)133 554.4 Q F1 -.1(ge)2.5 G(t).1 E F0
+(functions return -1 on error)2.5 E 2.5(,s)-.4 G(etting)283.02 554.4 Q F1
+(errno)2.5 E F0 2.5(,0o).18 G 2.5(ns)348.2 554.4 S(uccess, and 1 if the)359.59
+554.4 Q F1 -.1(ke)2.5 G(y)-.2 E F0 -.1(wa)2.5 G 2.5(sn).1 G(ot found.)476.83
+554.4 Q(int \(*put\)\(const DB *db, TXN *txnid,)108 571.2 Q(DBT *k)183 583.2 Q
+-.15(ey)-.1 G 2.5(,c)-.5 G(onst DBT *data, u_int \215ags\);)233.48 583.2 Q 2.5
+(Ap)133 595.2 S(ointer to a function to store k)147.72 595.2 Q -.15(ey)-.1 G
+(/data pairs in the database.).15 E(The)133 612 Q F1(txnid)3.317 E F0 .817
+(parameter contains a transaction ID returned from)3.317 F F1(txn_be)3.317 E
+(gin)-.4 E F0 3.317(,i).24 G 3.316(ft)431.22 612 S .816
+(he \214le is being accessed)440.646 612 R
+(under transaction protection, or NULL if transactions are not in ef)133 624 Q
+(fect.)-.25 E(The parameter)133 640.8 Q F1<8d61>2.5 E(g)-.1 E F0
+(must be set to 0 or e)2.5 E(xactly one of the follo)-.15 E(wing v)-.25 E
+(alues:)-.25 E(R_CURSOR)133 657.6 Q .448(Replace the k)158 669.6 R -.15(ey)-.1
+G .448(/data pair referenced by the cursor).15 F 5.449(.T)-.55 G .449
+(he cursor must ha)375.156 669.6 R .749 -.15(ve p)-.2 H(re).15 E .449
+(viously been ini-)-.25 F(tialized.)158 681.6 Q(4.4 Berk)72 732 Q(ele)-.1 E 2.5
+(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(3)535
+732 Q EP
+%%Page: 4 20
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 119.01(DB_OPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 119.01(anual DB_OPEN\(3\))340.17 48 R(R_NOO)133 84 Q(VER)-.5 E
+(WRITE)-.55 E(Enter the ne)158 96 Q 2.5(wk)-.25 G -.15(ey)220.69 96 S
+(/data pair only if the k).15 E .3 -.15(ey d)-.1 H(oes not pre).15 E(viously e)
+-.25 E(xist.)-.15 E .664(The def)133 112.8 R .664(ault beha)-.1 F .664
+(vior of the)-.2 F/F1 10/Times-Italic@0 SF(put)3.164 E F0 .664
+(functions is to enter the ne)3.164 F 3.164(wk)-.25 G -.15(ey)387.498 112.8 S
+.663(/data pair).15 F 3.163(,r)-.4 G .663(eplacing an)443.534 112.8 R 3.163(yp)
+-.15 G(re)503.03 112.8 Q(viously)-.25 E -.15(ex)133 124.8 S(isting k).15 E -.15
+(ey)-.1 G(.)-.5 E(The)133 141.6 Q F1(put)3.558 E F0 1.058
+(functions return -1 on error)3.558 F 3.559(,s)-.4 G(etting)291.089 141.6 Q F1
+(errno)3.559 E F0 3.559(,0o).18 G 3.559(ns)359.446 141.6 S 1.059
+(uccess, and 1 if the R_NOO)371.895 141.6 R(VER)-.5 E(WRITE)-.55 E F1<8d61>133
+153.6 Q(g)-.1 E F0 -.1(wa)2.5 G 2.5(ss).1 G(et and the k)172.24 153.6 Q .3 -.15
+(ey a)-.1 H(lready e).15 E(xists in the \214le.)-.15 E
+(int \(*seq\)\(const DB *db, TXN *txnid,)108 170.4 Q(DBT *k)183 182.4 Q -.15
+(ey)-.1 G 2.5(,D)-.5 G(BT *data, u_int \215ags\);)236.26 182.4 Q 2.877(Ap)133
+194.4 S .377(ointer to a function which is the interf)148.097 194.4 R .377
+(ace for sequential retrie)-.1 F -.25(va)-.25 G 2.877(lf).25 G .377
+(rom the database.)415.194 194.4 R .376(The address)5.376 F .012
+(and length of the k)133 206.4 R .312 -.15(ey a)-.1 H .012
+(re returned in the structure referenced by).15 F F1 -.1(ke)2.512 G(y)-.2 E F0
+2.512(,a).32 G .012(nd the address and length of the)412.726 206.4 R
+(data are returned in the structure referenced by)133 218.4 Q F1(data)2.5 E F0
+(.).26 E(The)133 235.2 Q F1(txnid)3.317 E F0 .817
+(parameter contains a transaction ID returned from)3.317 F F1(txn_be)3.317 E
+(gin)-.4 E F0 3.317(,i).24 G 3.316(ft)431.22 235.2 S .816
+(he \214le is being accessed)440.646 235.2 R
+(under transaction protection, or NULL if transactions are not in ef)133 247.2
+Q(fect.)-.25 E .721(Sequential k)133 264 R -.15(ey)-.1 G .721
+(/data pair retrie).15 F -.25(va)-.25 G 3.221(lm).25 G .721(ay be)277.884 264 R
+.721(gin at an)-.15 F 3.221(yt)-.15 G .721
+(ime, and the logical position of the `)346.568 264 R(`cursor')-.74 E 3.222('i)
+-.74 G(s)536.11 264 Q .947(not af)133 276 R .947(fected by calls to the)-.25 F
+F1(del)3.447 E F0(,).51 E F1 -.1(ge)3.447 G(t).1 E F0(,).68 E F1(put)3.447 E F0
+3.446(,o).68 G(r)308.572 276 Q F1(sync)3.446 E F0 3.446
+(functions. Modi\214cations)3.446 F .946(to the database during a)3.446 F 2.091
+(sequential scan will be re\215ected in the scan, i.e. records inserted behind\
+ the cursor will not be)133 288 R
+(returned while records inserted in front of the cursor will be returned.)133
+300 Q(The parameter)133 316.8 Q F1<8d61>2.5 E(g)-.1 E F0(must be set to 0 or e)
+2.5 E(xactly one of the follo)-.15 E(wing v)-.25 E(alues:)-.25 E(R_CURSOR)133
+333.6 Q .937(The data associated with the speci\214ed k)158 345.6 R 1.237 -.15
+(ey i)-.1 H 3.437(sr).15 G 3.437(eturned. This)348.546 345.6 R(dif)3.437 E .936
+(fers from the)-.25 F F1 -.1(ge)3.436 G(t).1 E F0 .936(functions in)3.436 F
+(that it sets or initializes the cursor to the location of the k)158 357.6 Q .3
+-.15(ey a)-.1 H 2.5(sw).15 G(ell.)415.5 357.6 Q(R_FIRST)133 374.4 Q .835
+(The \214rst k)158 386.4 R -.15(ey)-.1 G .835(/data pair of the database is re\
+turned, and the cursor is set or initialized to refer).15 F(-)-.2 E(ence it.)
+158 398.4 Q(R_NEXT)133 415.2 Q(Retrie)158 427.2 Q 1.015 -.15(ve t)-.25 H .715
+(he k).15 F -.15(ey)-.1 G .715(/data pair immediately after the cursor).15 F
+5.715(.I)-.55 G 3.215(ft)391.91 427.2 S .714
+(he cursor is not yet set, this is the)401.235 427.2 R
+(same as the R_FIRST \215ag.)158 439.2 Q(The)133 456 Q F1(seq)3.014 E F0 .514
+(functions return -1 on error)3.014 F 3.015(,s)-.4 G(etting)287.83 456 Q F1
+(errno)3.015 E F0 3.015(,0o).18 G 3.015(ns)354.555 456 S .515
+(uccess, and 1 if there are no k)366.46 456 R -.15(ey)-.1 G .515(/data pairs)
+.15 F(less than or greater than the speci\214ed or current k)133 468 Q -.15(ey)
+-.1 G(.)-.5 E(int \(*sync\)\(const DB *db, u_int \215ags\);)108 484.8 Q 3.291
+(Ap)133 496.8 S .791(ointer to a function to \215ush an)148.511 496.8 R 3.291
+(yc)-.15 G .791(ached information to disk.)286.388 496.8 R .79
+(If the database is in memory only)5.79 F(,)-.65 E(the)133 508.8 Q F1(sync)2.5
+E F0(function has no ef)2.5 E(fect and will al)-.25 E -.1(wa)-.1 G(ys succeed.)
+.1 E(The parameter)133 525.6 Q F1<8d61>2.5 E(g)-.1 E F0
+(must be set to 0 or a v)2.5 E
+(alue speci\214ed by an access method speci\214c manual page.)-.25 E(The)133
+542.4 Q F1(sync)2.5 E F0(functions return -1 on f)2.5 E(ailure, setting)-.1 E
+F1(errno)2.5 E F0 2.5(,a).18 G(nd 0 on success.)352.76 542.4 Q/F2 9
+/Times-Bold@0 SF(ERR)72 559.2 Q(ORS)-.27 E F0(The)108 571.2 Q F1(db_open)4.548
+E F0 2.048(function may f)4.548 F 2.049(ail and set)-.1 F F1(errno)4.549 E F0
+2.049(for an)4.549 F 4.549(yo)-.15 G 4.549(ft)345.977 571.2 S 2.049
+(he errors speci\214ed for the library functions)356.636 571.2 R F1(open)108
+583.2 Q F0(\(2\),).24 E F1(malloc)2.5 E F0(\(3\) or the follo).31 E(wing:)-.25
+E([EFTYPE])108 600 Q 2.5<418c>133 612 S(le is incorrectly formatted.)148.28 612
+Q([EINV)108 628.8 Q(AL])-1.35 E 2.557(Ap)133 640.8 S .056
+(arameter has been speci\214ed \(hash function, recno pad byte etc.\))147.777
+640.8 R .056(that is incompatible with the cur)5.056 F(-)-.2 E .725
+(rent \214le speci\214cation or)133 652.8 R 3.225(,a\215)-.4 G .725
+(ag to a function which is not meaningful for the function \(for e)248.435
+652.8 R(xample,)-.15 E .763(use of the cursor without prior initialization\) o\
+r there is a mismatch between the v)133 664.8 R .763(ersion number of)-.15 F
+(\214le and the softw)133 676.8 Q(are.)-.1 E(The)108 693.6 Q F1(close)2.913 E
+F0 .413(functions may f)2.913 F .413(ail and set)-.1 F F1(errno)2.913 E F0 .413
+(for an)2.913 F 2.913(yo)-.15 G 2.913(ft)319.62 693.6 S .414
+(he errors speci\214ed for the library functions)328.643 693.6 R F1(close)2.914
+E F0(\(2\),).18 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q
+99.315(ution August)-.2 F(1, 1995)2.5 E(4)535 732 Q EP
+%%Page: 5 21
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 119.01(DB_OPEN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 119.01(anual DB_OPEN\(3\))340.17 48 R/F1 10/Times-Italic@0 SF -.37
+(re)108 84 S(ad).37 E F0(\(2\),).77 E F1(write)2.5 E F0(\(2\),).18 E F1(fr)2.5
+E(ee)-.37 E F0(\(3\), or).18 E F1(fsync)2.5 E F0(\(2\).).31 E(The)108 100.8 Q
+F1(del)2.52 E F0(,).51 E F1 -.1(ge)2.52 G(t).1 E F0(,).68 E F1(put)2.52 E F0
+(and)2.52 E F1(seq)2.52 E F0 .02(functions may f)2.52 F .02(ail and set)-.1 F
+F1(errno)2.52 E F0 .02(for an)2.52 F 2.52(yo)-.15 G 2.52(ft)376.3 100.8 S .02
+(he errors speci\214ed for the library func-)384.93 100.8 R(tions)108 112.8 Q
+F1 -.37(re)2.5 G(ad).37 E F0(\(2\),).77 E F1(write)2.5 E F0(\(2\),).18 E F1(fr)
+2.5 E(ee)-.37 E F0(\(3\) or).18 E F1(malloc)2.5 E F0(\(3\).).31 E(The)108 129.6
+Q F1(fd)2.5 E F0(functions will f)2.5 E(ail and set)-.1 E F1(errno)2.5 E F0
+(to ENOENT for in memory databases.)2.5 E(The)108 146.4 Q F1(sync)2.5 E F0
+(functions may f)2.5 E(ail and set)-.1 E F1(errno)2.5 E F0(for an)2.5 E 2.5(yo)
+-.15 G 2.5(ft)312.71 146.4 S(he errors speci\214ed for the library function)
+321.32 146.4 Q F1(fsync)2.5 E F0(\(2\).).31 E/F2 9/Times-Bold@0 SF(SEE ALSO)72
+163.2 Q F1(db_btr)108 175.2 Q(ee)-.37 E F0(\(3\),).18 E F1(db_hash)2.5 E F0
+(\(3\),).28 E F1(db_loc)2.5 E(k)-.2 E F0(\(3\),).67 E F1(db_lo)2.5 E(g)-.1 E F0
+(\(3\),).22 E F1(db_mpool)2.5 E F0(\(3\),).51 E F1(db_r)2.5 E(ecno)-.37 E F0
+(\(3\),).18 E F1(db_txn)2.5 E F0(\(3\)).24 E F2 -.09(BU)72 192 S(GS).09 E F0
+.106(The name DBT is a mnemonic for `)108 204 R .106(`data base thang')-.74 F
+.106(', and w)-.74 F .107(as used because noone could think of a reason-)-.1 F
+(able name that w)108 216 Q(asn')-.1 E 2.5(ta)-.18 G(lready in use some)202.14
+216 Q(where else.)-.25 E(The)108 232.8 Q F1(fd)2.5 E F0(function interf)2.5 E
+(ace is a kluge, and will be deleted in a future v)-.1 E(ersion of the interf)
+-.15 E(ace.)-.1 E(Only big and little endian byte order is supported.)108 249.6
+Q(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315
+(ution August)-.2 F(1, 1995)2.5 E(5)535 732 Q EP
+%%Page: 1 22
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 111.23(DB_RECNO\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 111.23(anual DB_RECNO\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)
+72 84 S(ME).18 E F0(db_recno \255 record number database access method)108 96 Q
+F1(DESCRIPTION)72 112.8 Q F0(speci\214c details of the recno access method.)108
+124.8 Q F1 -.495(AC)72 141.6 S(CESS METHOD SPECIFIC INFORMA).495 E(TION)-.855 E
+F0 2.497(The recno access method speci\214c data structure pro)108 153.6 R
+2.497(vided to)-.15 F/F2 10/Times-Italic@0 SF(db_open)4.997 E F0 2.497
+(is typedef)4.997 F 3.497 -.5('d a).55 H 2.497(nd named REC-).5 F 2.765
+(NOINFO. A)108 165.6 R .265(RECNOINFO structure has at least the follo)2.765 F
+.266(wing \214elds, which may be initialized before call-)-.25 F(ing)108 177.6
+Q F2(db_open)2.5 E F0(:).24 E(u_int8_t b)108 194.4 Q -.25(va)-.15 G(l;).25 E
+.793(The delimiting byte to be used to mark the end of a record for v)133 206.4
+R .793(ariable-length records, and the pad)-.25 F .386(character for \214x)133
+218.4 R .387(ed-length records.)-.15 F .387(If no v)5.387 F .387
+(alue is speci\214ed, ne)-.25 F .387(wlines \(`)-.25 F(`\\n')-.74 E .387
+('\) are used to mark the end)-.74 F(of v)133 230.4 Q
+(ariable-length records and \214x)-.25 E
+(ed-length records are padded with spaces.)-.15 E(char *bfname;)108 247.2 Q
+1.152(The recno access method stores the in-memory copies of its records in a \
+btree.)133 259.2 R 1.152(If bfname is non-)6.152 F .35(NULL, it speci\214es th\
+e name of the btree \214le, as if speci\214ed as the \214le name for a)133
+271.2 R F2(db_open)2.851 E F0 .351(of a btree)2.851 F(\214le.)133 283.2 Q
+(u_int cachesize;)108 300 Q 3.847(As)133 312 S 1.347
+(uggested maximum size, in bytes, of the memory cache.)147.957 312 R 1.347
+(This v)6.347 F 1.347(alue is)-.25 F/F3 10/Times-Bold@0 SF(only)3.847 E F0
+(advisory)3.847 E 3.846(,a)-.65 G 1.346(nd the)513.934 312 R .693
+(access method will allocate more memory rather than f)133 324 R 3.193(ail. If)
+-.1 F F2(cac)3.193 E(hesize)-.15 E F0 3.193(is 0)3.193 F .693
+(\(no size is speci\214ed\) a)3.193 F(def)133 336 Q(ault size is used.)-.1 E
+(u_long \215ags;)108 352.8 Q(The \215ag v)133 364.8 Q(alue is speci\214ed by)
+-.25 E F2(or)2.5 E F0('ing an).73 E 2.5(yo)-.15 G 2.5(ft)302.2 364.8 S
+(he follo)310.81 364.8 Q(wing v)-.25 E(alues:)-.25 E(R_FIXEDLEN)133 381.6 Q
+1.49(The records are \214x)158 393.6 R 1.489(ed-length, not byte delimited.)
+-.15 F 1.489(The structure element)6.489 F F2 -.37(re)3.989 G(clen).37 E F0
+1.489(speci\214es the)3.989 F .487
+(length of the record, and the structure element)158 405.6 R F2(bval)2.987 E F0
+.488(is used as the pad character)2.988 F 5.488(.A)-.55 G .788 -.15(ny r)
+495.232 405.6 T(ecords,).15 E(inserted into the database, that are less than)
+158 417.6 Q F2 -.37(re)2.5 G(clen).37 E F0
+(bytes long are automatically padded.)2.5 E(R_NOKEY)133 434.4 Q 1.146
+(In the interf)158 446.4 R 1.146(ace speci\214ed by)-.1 F F2(db_open)3.646 E F0
+3.646(,t).24 G 1.146(he sequential record retrie)320.816 446.4 R -.25(va)-.25 G
+3.646<6c8c>.25 G 1.145(lls in both the caller')449.31 446.4 R(s)-.55 E -.1(ke)
+158 458.4 S 4.795(ya)-.05 G 2.295(nd data structures.)181.425 458.4 R 2.295
+(If the R_NOKEY \215ag is speci\214ed, the)7.295 F F2(cur)4.795 E(sor)-.1 E F0
+2.295(functions are not)4.795 F .621(required to \214ll in the k)158 470.4 R
+.921 -.15(ey s)-.1 H 3.121(tructure. This).15 F .621
+(permits applications to retrie)3.121 F .92 -.15(ve r)-.25 H .62
+(ecords at the end of).15 F(\214les without reading all of the interv)158 482.4
+Q(ening records.)-.15 E(R_SN)133 499.2 Q(APSHO)-.35 E(T)-.4 E .029
+(This \215ag requires that a snapshot of the \214le be tak)158 511.2 R .029
+(en when)-.1 F F2(db_open)2.529 E F0 .029(is called, instead of permit-)2.529 F
+(ting an)158 523.2 Q 2.5(yu)-.15 G
+(nmodi\214ed records to be read from the original \214le.)197.85 523.2 Q
+(int lorder;)108 540 Q .65(The byte order for inte)133 552 R .65
+(gers in the stored database metadata.)-.15 F .65
+(The number should represent the order)5.65 F .748(as an inte)133 564 R .749
+(ger; for e)-.15 F .749(xample, big endian order w)-.15 F .749
+(ould be the number 4,321.)-.1 F(If)5.749 E F2(lor)3.249 E(der)-.37 E F0 .749
+(is 0 \(no order is)3.249 F(speci\214ed\) the current host order is used.)133
+576 Q(u_int psize;)108 592.8 Q .284(The recno access method stores the in-memo\
+ry copies of its records in a btree.)133 604.8 R .284(This v)5.284 F .283
+(alue is the size)-.25 F .297
+(\(in bytes\) of the pages used for nodes in that tree.)133 616.8 R(If)5.297 E
+F2(psize)2.797 E F0 .297(is 0 \(no page size is speci\214ed\) a page size)2.797
+F(is chosen based on the underlying \214le system I/O block size.)133 628.8 Q
+(See)5 E F2(btr)2.5 E(ee)-.37 E F0(\(3\) for more information.).18 E
+(size_t reclen;)108 645.6 Q(The length of a \214x)133 657.6 Q
+(ed-length record.)-.15 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)
+132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(1)535 732 Q EP
+%%Page: 2 23
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 111.23(DB_RECNO\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 111.23(anual DB_RECNO\(3\))340.17 48 R/F1 9/Times-Bold@0 SF
+(DB OPERA)72 84 Q(TIONS)-.855 E F0 .972(The data part of the k)108 96 R -.15
+(ey)-.1 G .971(/data pair used by the recno access method is the same as other\
+ access methods.).15 F .198(The k)108 108 R .498 -.15(ey i)-.1 H 2.698(sd).15 G
+(if)157.504 108 Q 2.698(ferent. The)-.25 F/F2 10/Times-Italic@0 SF(data)2.698 E
+F0 .198(\214eld of the k)2.698 F .499 -.15(ey s)-.1 H .199
+(hould be a pointer to a memory location of type).15 F F2 -.37(re)2.699 G
+(cno_t).37 E F0 2.699(,a).68 G(s)536.11 108 Q .506(de\214ned in the <db)108 120
+R .506(.h> include \214le.)-.4 F .506(This type is normally the lar)5.506 F
+.506(gest unsigned inte)-.18 F .506(gral type a)-.15 F -.25(va)-.2 G .505
+(ilable to the).25 F 2.5(implementation. The)108 132 R F2(size)2.5 E F0
+(\214eld of the k)2.5 E .3 -.15(ey s)-.1 H(hould be the size of that type.).15
+E 1.944(The record number data structure is either v)108 148.8 R 1.944
+(ariable or \214x)-.25 F 1.944
+(ed-length records stored in a \215at-\214le format,)-.15 F 1.856
+(accessed by the logical record number)108 160.8 R 6.856(.T)-.55 G 1.856(he e)
+285.206 160.8 R 1.856(xistence of record number \214v)-.15 F 4.356(er)-.15 G
+1.856(equires the e)440.442 160.8 R 1.856(xistence of)-.15 F .875
+(records one through four)108 172.8 R 3.375(,a)-.4 G .875
+(nd the deletion of record number one causes record number \214v)219.68 172.8 R
+3.376(et)-.15 G 3.376(ob)489.928 172.8 S 3.376(er)503.304 172.8 S(enum-)514.45
+172.8 Q .283(bered to record number four)108 184.8 R 2.783(,a)-.4 G 2.783(sw)
+231.195 184.8 S .283(ell as the cursor)245.088 184.8 R 2.783(,i)-.4 G 2.783(fp)
+316.64 184.8 S .282(ositioned after record number one, to shift do)327.753
+184.8 R .282(wn one)-.25 F 3.18(record. The)108 196.8 R .68
+(creation of record number \214v)3.18 F 3.18(ew)-.15 G .681
+(hen records one through four do not e)295.05 196.8 R .681
+(xist causes the logical)-.15 F(creation of them with zero-length data.)108
+208.8 Q .372(Because there is no meta-data associated with the underlying recn\
+o access method \214les, an)108 225.6 R 2.872(yc)-.15 G .372(hanges made)
+487.698 225.6 R .191(to the def)108 237.6 R .191(ault v)-.1 F .191
+(alues \(e.g. \214x)-.25 F .192(ed record length or byte separator v)-.15 F
+.192(alue\) must be e)-.25 F .192(xplicitly speci\214ed each time)-.15 F
+(the \214le is opened.)108 249.6 Q 1.037(The functions returned by)108 266.4 R
+F2(db_open)3.537 E F0 1.036(for the btree access method are as described in)
+3.536 F F2(db_open)3.536 E F0 1.036(\(3\), with the).24 F(follo)108 278.4 Q
+(wing e)-.25 E(xceptions and additions:)-.15 E 5.28(type The)108 295.2 R
+(type is DB_RECNO.)2.5 E 9.72(put Using)108 312 R(the)2.558 E F2(put)2.558 E F0
+(interf)2.559 E .059(ace to create a ne)-.1 F 2.559(wr)-.25 G .059
+(ecord will cause the creation of multiple, empty records if the)293.07 312 R
+(record number is more than one greater than the lar)133 324 Q
+(gest record currently in the database.)-.18 E(The)133 340.8 Q F2(put)2.5 E F0
+(function tak)2.5 E(es the follo)-.1 E(wing additional \215ags:)-.25 E
+(R_IAFTER)133 357.6 Q 1.225
+(Append the data immediately after the data referenced by)158 369.6 R F2 -.1
+(ke)3.724 G(y)-.2 E F0 3.724(,c).32 G 1.224(reating a ne)425.354 369.6 R 3.724
+(wk)-.25 G -.15(ey)490.046 369.6 S 1.224(/data pair).15 F(.)-.55 E
+(The record number of the appended k)158 381.6 Q -.15(ey)-.1 G
+(/data pair is returned in the).15 E F2 -.1(ke)2.5 G(y)-.2 E F0(structure.)2.5
+E(R_IBEFORE)133 398.4 Q 1.343
+(Insert the data immediately before the data referenced by)158 410.4 R F2 -.1
+(ke)3.844 G(y)-.2 E F0 3.844(,c).32 G 1.344(reating a ne)424.874 410.4 R 3.844
+(wk)-.25 G -.15(ey)489.926 410.4 S 1.344(/data pair).15 F(.)-.55 E
+(The record number of the inserted k)158 422.4 Q -.15(ey)-.1 G
+(/data pair is returned in the).15 E F2 -.1(ke)2.5 G(y)-.2 E F0(structure.)2.5
+E(R_SETCURSOR)133 439.2 Q(Store the k)158 451.2 Q -.15(ey)-.1 G(/data pair).15
+E 2.5(,s)-.4 G
+(etting or initializing the position of the cursor to reference it.)256.5 451.2
+Q 9.17(seq The)108 468 R F2(seq)2.5 E F0(function tak)2.5 E(es the follo)-.1 E
+(wing additional \215ags:)-.25 E(R_LAST)133 484.8 Q .04(The last k)158 496.8 R
+-.15(ey)-.1 G .04(/data pair of the database is returned, and the cursor is se\
+t or initialized to reference).15 F(it.)158 508.8 Q(R_PREV)133 525.6 Q(Retrie)
+158 537.6 Q .59 -.15(ve t)-.25 H .29(he k).15 F -.15(ey)-.1 G .29
+(/data pair immediately before the cursor).15 F 5.29(.I)-.55 G 2.79(ft)395.73
+537.6 S .29(he cursor is not yet set, this is the)404.63 537.6 R
+(same as the R_LAST \215ag.)158 549.6 Q .749
+(If the database \214le is a character special \214le and no complete k)133
+566.4 R -.15(ey)-.1 G .748(/data pairs are currently a).15 F -.25(va)-.2 G
+(ilable,).25 E(the)133 578.4 Q F2(seq)2.5 E F0(function returns 2.)2.5 E 4.17
+(sync The)108 595.2 R F2(sync)2.5 E F0(function tak)2.5 E(es the follo)-.1 E
+(wing additional \215ag:)-.25 E(R_RECNOSYNC)133 612 Q .643
+(This \215ag causes the)158 624 R F2(sync)3.143 E F0 .644
+(function to apply to the btree \214le which underlies the recno \214le, not)
+3.143 F .09(the recno \214le itself.)158 636 R .09(\(See the)5.09 F F2(bfname)
+2.59 E F0 .09(\214eld of RECNOINFO structure, abo)2.59 F -.15(ve)-.15 G 2.59
+(,f).15 G .09(or more informa-)470.95 636 R(tion.\))158 648 Q F1(ERR)72 664.8 Q
+(ORS)-.27 E F0(The)108 676.8 Q F2 -.37(re)3.731 G(cno).37 E F0 1.231
+(access method functions may f)3.731 F 1.231(ail and set)-.1 F F2(errno)3.731 E
+F0 1.231(for an)3.731 F 3.731(yo)-.15 G 3.731(ft)392.652 676.8 S 1.231
+(he errors speci\214ed for the library)402.493 676.8 R(function)108 688.8 Q F2
+(db_open)2.5 E F0(\(3\) or the follo).24 E(wing:)-.25 E(4.4 Berk)72 732 Q(ele)
+-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E
+(2)535 732 Q EP
+%%Page: 3 24
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 111.23(DB_RECNO\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 111.23(anual DB_RECNO\(3\))340.17 48 R([EINV)108 84 Q(AL])-1.35 E
+(An attempt w)133 96 Q(as made to add a record to a \214x)-.1 E
+(ed-length database that w)-.15 E(as too lar)-.1 E(ge to \214t.)-.18 E/F1 9
+/Times-Bold@0 SF(SEE ALSO)72 112.8 Q/F2 10/Times-Italic@0 SF(db_btr)108 124.8 Q
+(ee)-.37 E F0(\(3\),).18 E F2(db_hash)2.5 E F0(\(3\),).28 E F2(db_loc)2.5 E(k)
+-.2 E F0(\(3\),).67 E F2(db_lo)2.5 E(g)-.1 E F0(\(3\),).22 E F2(db_mpool)2.5 E
+F0(\(3\),).51 E F2(db_open)2.5 E F0(\(3\),).24 E F2(db_txn)2.5 E F0(\(3\)).24 E
+F2 2.755(Document Pr)108 148.8 R 2.755
+(ocessing in a Relational Database System)-.45 F F0 5.254(,M).32 G 2.754
+(ichael Stonebrak)362.134 148.8 R(er)-.1 E 5.254(,H)-.4 G 2.754(eidi Stettner)
+454.062 148.8 R 5.254(,J)-.4 G(oseph)516.67 148.8 Q
+(Kalash, Antonin Guttman, Nadene L)108 160.8 Q
+(ynn, Memorandum No. UCB/ERL M82/32, May 1982.)-.55 E F1 -.09(BU)72 177.6 S(GS)
+.09 E F0(The)108 189.6 Q F2(sync)3.616 E F0(function')3.616 E 3.616(sR)-.55 G
+1.116(_RECNOSYNC interf)198.838 189.6 R 1.117
+(ace is a kluge, and will be deleted in a future v)-.1 F 1.117(ersion of the)
+-.15 F(interf)108 201.6 Q(ace.)-.1 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G
+(istrib)132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(3)535 732 Q EP
+%%Page: 1 25
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_TXN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_TXN\(3\))340.17 48 R/F1 9/Times-Bold@0 SF -.18(NA)72
+84 S(ME).18 E F0(db_txn \255 transaction management functions)108 96 Q F1
+(SYNOPSIS)72 112.8 Q/F2 10/Times-Bold@0 SF(#include <db)108 124.8 Q(.h>)-.4 E
+(#include <db_lock.h>)108 136.8 Q(int)108 160.8 Q(txn_cr)108 172.8 Q
+(eate\(const char *path, mode_t mode, u_int maxtxns, u_int \215ags\);)-.18 E
+(TXNMGR *)108 196.8 Q(txn_open\(const char *path, DBT *logp, LOCK_T)108 208.8 Q
+(ABLE_T *lockp,)-.9 E(int \(*r)158 220.8 Q(eco)-.18 E -.1(ve)-.1 G
+(r\)\(DBT *lsn, DBT *log_entry).1 E 2.5(,i)-.55 G(nt isundo\)\);)340.11 220.8 Q
+(TXN *)108 244.8 Q(txn_begin\(TXNMGR *txnp\);)108 256.8 Q(int)108 280.8 Q
+(txn_commit\(TXN *tid\);)108 292.8 Q(int)108 316.8 Q(txn_pr)108 328.8 Q(epar)
+-.18 E(e\(TXN *tid\);)-.18 E(int)108 352.8 Q(txn_abort\(TXN *tid\);)108 364.8 Q
+(int)108 388.8 Q(txn_close\(TXNMGR *txnp\);)108 400.8 Q(int)108 424.8 Q
+(txn_unlink\(const char *path, int f)108 436.8 Q(or)-.25 E(ce\);)-.18 E F1
+(DESCRIPTION)72 453.6 Q F0(speci\214c details of the transaction support.)108
+465.6 Q/F3 10/Times-Italic@0 SF(Db_txn)108 482.4 Q F0 .034
+(is the library interf)2.534 F .034(ace that pro)-.1 F .034
+(vides transaction semantics.)-.15 F .034(Full transaction support is pro)5.034
+F .034(vided by a)-.15 F .722(collection of modules that pro)108 494.4 R .723
+(vide well de\214ned interf)-.15 F .723
+(aces to the services required for transaction process-)-.1 F 3.488(ing. These)
+108 506.4 R .988(services are reco)3.488 F -.15(ve)-.15 G .988(ry \(see).15 F
+F3(db_lo)3.488 E(g)-.1 E F0 .988(\(3\)\), concurrenc).22 F 3.488(yc)-.15 G .988
+(ontrol \(see)371.864 506.4 R F3(db_loc)3.487 E(k)-.2 E F0 .987
+(\(3\)\), and the manage-).67 F 2.201(ment of shared data \(see)108 518.4 R F3
+(db_mpool)4.701 E F0 4.701(\(3\)\). T).51 F 2.202
+(ransaction semantics can be applied to the access methods)-.35 F(described in)
+108 530.4 Q F3(db)2.5 E F0(\(3\) through function call parameters.).23 E .629(\
+The model intended for transactional use \(and that is used by the access meth\
+ods\) is that write-ahead log-)108 547.2 R .047(ging is pro)108 559.2 R .047
+(vided by)-.15 F F3(db_lo)2.547 E(g)-.1 E F0 .047
+(\(3\) to record both before- and after).22 F .048(-image logging.)-.2 F .048
+(Locking follo)5.048 F .048(ws a tw)-.25 F(o-phase)-.1 E
+(protocol and is implemented by)108 571.2 Q F3(db_loc)2.5 E(k)-.2 E F0(\(3\).)
+.67 E .549(The function)108 588 R F3(txn_cr)3.049 E(eate)-.37 E F0 .549
+(creates and initializes the transaction re)3.049 F .548
+(gion identi\214ed by the)-.15 F F3(path)3.048 E F0(directory)3.048 E 5.548(.T)
+-.65 G(his)528.33 588 Q .572(directory must already e)108 600 R .572(xist when)
+-.15 F F3(txn_cr)3.072 E(eate)-.37 E F0 .572(is called.)3.072 F .572
+(If the transaction re)5.572 F .572(gion identi\214ed by)-.15 F F3(path)3.072 E
+F0(already)3.072 E -.15(ex)108 612 S 1.78(ists, then).15 F F3(txn_cr)4.28 E
+(eate)-.37 E F0 1.78(returns success without further action.)4.28 F 1.78
+(The \214les associated with the transaction)6.78 F(re)108 624 Q .293
+(gion are created in the directory speci\214ed by)-.15 F F3(path)2.793 E F0
+5.293(.\().28 G .293(The group of the created \214les is based on the system)
+327.657 624 R .781(and directory def)108 636 R .781
+(aults, and is not further speci\214ed by)-.1 F F3(txn_cr)3.281 E(eate)-.37 E
+F0 3.281(.\) All).18 F .78(\214les created by)3.28 F F3(txn_cr)3.28 E(eate)-.37
+E F0 .78(are cre-)3.28 F .048(ated with mode)108 648 R F3(mode)2.548 E F0 .049
+(\(as described in)2.548 F F3 -.15(ch)2.549 G(mod).15 E F0 .049
+(\(2\)\) and modi\214ed by the process' umask v).77 F .049(alue \(see)-.25 F F3
+(umask)2.549 E F0(\(2\)\).).67 E(An)108 660 Q 2.5(yn)-.15 G(ecessary)132.57 660
+Q 2.5(,a)-.65 G(ssociated log and lock re)175.23 660 Q
+(gions are created as well \(see)-.15 E F3(db_lo)2.5 E(g)-.1 E F0(\(3\) and).22
+E F3(db_loc)2.5 E(k)-.2 E F0(\(3\)\).).67 E(The)108 676.8 Q F3(maxtxns)4.191 E
+F0(ar)4.191 E 1.691(gument speci\214es the maximum number of simultaneous tran\
+sactions that are supported.)-.18 F .229
+(This bounds the size of backing \214les and is used to deri)108 688.8 R .529
+-.15(ve l)-.25 H .229(imits for the size of the lock re).15 F .229
+(gion and log\214les.)-.15 F(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)
+132.57 732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(1)535 732 Q EP
+%%Page: 2 26
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_TXN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_TXN\(3\))340.17 48 R(When there are more than)108 84
+Q/F1 10/Times-Italic@0 SF(maxtxns)2.5 E F0(concurrent transactions, calls to)
+2.5 E F1(txn_be)2.5 E(gin)-.4 E F0(may f)2.5 E(ail.)-.1 E(Def)108 100.8 Q .847
+(ault locking and logging protocols are pro)-.1 F .846
+(vided only if the backing \214les e)-.15 F 3.346(xist. If)-.15 F .846
+(the backing \214les do)3.346 F 1.433(not e)108 112.8 R 1.433(xist, the)-.15 F
+F1<8d61>3.933 E(gs)-.1 E F0 1.434
+(parameter must indicate both a logging mode and locking mode speci\214ed by)
+3.933 F F1(or)3.934 E F0('ing).73 E(together at most one \215ag from each of t\
+he TXN_LOCK and TXN_LOG classes as follo)108 124.8 Q(ws:)-.25 E(TXN_LOCK_2PL)
+108 141.6 Q(Use tw)133 153.6 Q(o-phase locking.)-.1 E(TXN_LOCK_OPTIMISTIC)108
+170.4 Q(Use optimistic locking \(not currently implemented\).)133 182.4 Q
+(TXN_LOG_REDO)108 199.2 Q(Pro)133 211.2 Q
+(vide redo-only logging \(not currently implemented\).)-.15 E(TXN_LOG_UNDO)108
+228 Q(Pro)133 240 Q(vide undo-only logging \(not currently implemented\).)-.15
+E(TXN_LOG_UNDOREDO)108 256.8 Q(Pro)133 268.8 Q
+(vide undo/redo write-ahead logging.)-.15 E(The function)108 285.6 Q F1(txn_cr)
+2.5 E(eate)-.37 E F0(returns -1 on f)2.5 E(ailure, setting)-.1 E F1(errno)2.5 E
+F0 2.5(,a).18 G(nd 0 on success.)351.83 285.6 Q 1.892(The function)108 302.4 R
+F1(txn_open)4.392 E F0 1.892(returns a pointer to the transaction re)4.392 F
+1.892(gion identi\214ed by)-.15 F F1(path)4.392 E F0 4.392(,w).28 G 1.892
+(hich must ha)476.016 302.4 R -.15(ve)-.2 G .239
+(already been created by a call to)108 314.4 R F1(txn_cr)2.739 E(eate)-.37 E F0
+5.239(.T).18 G .239(he process must ha)296.88 314.4 R .539 -.15(ve p)-.2 H .239
+(ermission to read and write \214les with).15 F -.25(ow)108 326.4 S .327
+(ners, groups and permissions as described for).25 F F1(txn_cr)2.826 E(eate)
+-.37 E F0 5.326(.T).18 G(he)362.624 326.4 Q F1(txn_open)2.826 E F0 .326
+(function returns NULL on f)2.826 F(ail-)-.1 E(ure, setting)108 338.4 Q F1
+(errno)2.5 E F0(.).18 E(The)108 355.2 Q F1 -.37(re)3.181 G(co).37 E(ver)-.1 E
+F0(ar)3.181 E .681(gument speci\214es a function that is called by)-.18 F F1
+(txn_abort)3.181 E F0 .682(during transaction abort.)3.182 F .682(This func-)
+5.682 F(tion tak)108 367.2 Q(es three ar)-.1 E(guments:)-.18 E 10.83(lsn A)108
+384 R(log sequence number \(LSN\).)2.5 E(log_entry)108 400.8 Q 2.5(Al)133 412.8
+S(og record.)145.5 412.8 Q(isundo)108 429.6 Q(An undo \215ag set to 0 if the o\
+peration is a redo and set to 1 if the operation an undo.)133 441.6 Q 1.498
+(As discussed in the)108 458.4 R F1(db_lo)3.998 E 3.998(g\()-.1 G(3\))228.44
+458.4 Q F0 1.497(manual page, the application is responsible for pro)3.997 F
+1.497(viding an)-.15 F 3.997(yn)-.15 G(ecessary)506.13 458.4 Q .486
+(structure to the log record.)108 470.4 R -.15(Fo)5.486 G 2.986(re).15 G .487
+(xample, the application must understand what part of the log record is an)
+242.256 470.4 R(operation code, what part is redo information, and what part i\
+s undo information.)108 482.4 Q(The)108 499.2 Q F1(txn_be)2.785 E(gin)-.4 E F0
+.285(function creates a ne)2.785 F 2.784(wt)-.25 G .284
+(ransaction in the designated transaction manager)264.018 499.2 R 2.784(,r)-.4
+G .284(eturning a pointer)468.332 499.2 R
+(to a TXN that uniquely identi\214es it.)108 511.2 Q(The)108 528 Q F1
+(txn_commit)2.615 E F0 .115(function ends the transaction speci\214ed by the)
+2.615 F F1(tid)2.615 E F0(ar)2.615 E 2.615(gument. An)-.18 F 2.615(yl)-.15 G
+.115(ocks held by the transac-)440.12 528 R(tion are released.)108 540 Q
+(If logging is enabled, a commit log record is written and \215ushed to disk.)5
+E(The)108 556.8 Q F1(txn_abort)2.889 E F0 .389
+(function causes an abnormal termination of the transaction.)2.889 F .388
+(If logging is enabled, the log is)5.389 F 2.312(played backw)108 568.8 R 2.312
+(ards and an)-.1 F 4.812(yr)-.15 G(eco)228.628 568.8 Q -.15(ve)-.15 G 2.312
+(ry operations are initiated through the).15 F F1 -.37(re)4.813 G(co).37 E(ver)
+-.1 E F0 2.313(function speci\214ed to)4.813 F F1(txn_open)108 580.8 Q F0 5(.A)
+.24 G(fter reco)159.62 580.8 Q -.15(ve)-.15 G
+(ry is completed, all locks held by the transaction are released.).15 E(The)108
+597.6 Q F1(txn_close)3.824 E F0 1.323
+(function detaches a process from the transaction en)3.823 F 1.323
+(vironment speci\214ed by the TXNMGR)-.4 F(pointer)108 609.6 Q 5.261(.A)-.55 G
+.261(ll mapped re)150.761 609.6 R .261(gions are unmapped and an)-.15 F 2.761
+(ya)-.15 G .262(llocated resources are freed.)323.638 609.6 R(An)5.262 E 2.762
+(yu)-.15 G .262(ncommitted trans-)466.688 609.6 R(actions are aborted.)108
+621.6 Q .69(The function)108 638.4 R F1(txn_unlink)3.19 E F0(destro)3.19 E .69
+(ys the transaction re)-.1 F .69(gion identi\214ed by the directory)-.15 F F1
+(path)3.19 E F0 3.19(,r).28 G(emo)472.1 638.4 Q .69(ving all \214les)-.15 F
+1.78(used to implement the transaction re)108 650.4 R 4.28(gion. \(The)-.15 F
+(directory)4.28 E F1(path)4.28 E F0 1.78(is not remo)4.28 F -.15(ve)-.15 G 4.28
+(d.\) If).15 F 1.78(there are processes)4.28 F .553(which ha)108 662.4 R .853
+-.15(ve c)-.2 H(alled).15 E F1(txn_open)3.052 E F0 .552(without calling)3.052 F
+F1(txn_close)3.052 E F0 .552
+(\(i.e., there are processes currently using the transac-)3.052 F .135(tion re)
+108 674.4 R(gion\),)-.15 E F1(txn_unlink)2.635 E F0 .135(will f)2.635 F .135
+(ail without further action, unless the force \215ag is set, in which case)-.1
+F F1(txn_unlink)2.636 E F0 1.67(will attempt to delete the transaction re)108
+686.4 R 1.67(gion \214les re)-.15 F -.05(ga)-.15 G 1.67(rdless of an).05 F 4.17
+(yp)-.15 G 1.67(rocesses still using the transaction)397.22 686.4 R(4.4 Berk)72
+732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315(ution August)-.2 F
+(1, 1995)2.5 E(2)535 732 Q EP
+%%Page: 3 27
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_TXN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_TXN\(3\))340.17 48 R(re)108 84 Q 2.996(gion. An)-.15
+F 2.996(ya)-.15 G .496(ccesses to a remo)165.902 84 R -.15(ve)-.15 G 2.997(dt)
+.15 G .497(ransaction re)257.007 84 R .497(gion will lik)-.15 F .497
+(ely result in une)-.1 F .497(xpected beha)-.15 F(vior)-.2 E 5.497(.T)-.55 G
+.497(he func-)506.463 84 R(tion)108 96 Q/F1 10/Times-Italic@0 SF(txn_unlink)2.5
+E F0(returns -1 on f)2.5 E(ailure, setting)-.1 E F1(errno)2.5 E F0 2.5(,a).18 G
+(nd 0 on success.)316.39 96 Q .51(In the case of catastrophic or system f)108
+112.8 R .51(ailure, it is possible to clean up a transaction re)-.1 F .51
+(gion by remo)-.15 F .51(ving all)-.15 F .34
+(of the \214les in the directory speci\214ed to the)108 124.8 R F1(txn_cr)2.841
+E(eate)-.37 E F0 .341(function, as transaction re)2.841 F .341
+(gion \214les are ne)-.15 F -.15(ve)-.25 G 2.841(rc).15 G(reated)515.57 124.8 Q
+(in an)108 136.8 Q 2.5(yd)-.15 G(irectory other than the one speci\214ed to)
+140.07 136.8 Q F1(txn_cr)2.5 E(eate)-.37 E F0(.).18 E(The)108 153.6 Q F1
+(txn_pr)3.42 E(epar)-.37 E(e)-.37 E F0 .92(function initiates the be)3.42 F
+.919(ginning of a tw)-.15 F 3.419(op)-.1 G .919(hase commit.)352.206 153.6 R
+.919(In a distrib)5.919 F .919(uted transaction, the)-.2 F .185
+(prepare directi)108 165.6 R .485 -.15(ve s)-.25 H .185
+(hould be issued to all participating transaction managers.).15 F .185
+(Each manager must tak)5.185 F 2.685(ew)-.1 G(hat-)524.45 165.6 Q -2.15 -.25
+(ev e)108 177.6 T 2.5(ra).25 G
+(ction is necessary to guarantee that a future call to)131.75 177.6 Q F1
+(txn_commit)2.5 E F0(on the speci\214ed)2.5 E F1(tid)2.5 E F0(will succeed.)2.5
+E/F2 9/Times-Bold@0 SF(SYSTEM INTEGRA)72 194.4 Q(TION)-.855 E F0 .28
+(This model can be applied to data bases other than the pro)108 206.4 R .279
+(vided access methods.)-.15 F -.15(Fo)5.279 G 2.779(re).15 G .279
+(xample, consider an)459.182 206.4 R .15(application that pro)108 218.4 R .15
+(vides transaction semantics to data stored in re)-.15 F .15
+(gular \214les accessed using the)-.15 F F1 -.37(re)2.65 G(ad).37 E F0 .15
+(\(2\) and).77 F F1(write)108 230.4 Q F0 .708(\(2\) system calls.).18 F .707
+(The operations for which transaction protection is desired are brack)5.708 F
+.707(eted by calls to)-.1 F F1(txn_be)108 242.4 Q(gin)-.4 E F0(and)2.5 E F1
+(txn_commit)2.5 E F0(.).68 E .606
+(Before data are referenced, a call is made to the lock manager)108 259.2 R(,)
+-.4 E F1(db_loc)3.106 E(k)-.2 E F0 3.106(,f).67 G .606
+(or a lock of the appropriate type)408.064 259.2 R .719
+(\(e.g. read\) on the object being lock)108 271.2 R 3.218(ed. The)-.1 F .718
+(object might be a page in the \214le, a byte, a range of bytes, or)3.218 F
+.572(some k)108 283.2 R -.15(ey)-.1 G 5.572(.B)-.5 G .573
+(efore a write is performed, the application mak)160.464 283.2 R .573
+(es a call to the log manager)-.1 F(,)-.4 E F1(db_lo)3.073 E(g)-.1 E F0 3.073
+(,t).22 G 3.073(or)506.387 283.2 S(ecord)517.79 283.2 Q .522
+(enough information to redo the operation in case of f)108 295.2 R .522
+(ailure after commit and to undo the operation in case)-.1 F .609(of abort.)108
+307.2 R .609
+(After the log message is written, the write system calls are issued.)5.609 F
+.61(After all requests are issued,)5.61 F .518(the application calls)108 319.2
+R F1(txn_commit)3.017 E F0 5.517(.W).68 G(hen)256.84 319.2 Q F1(txn_commit)
+3.017 E F0 .517(returns, the caller is guaranteed that all necessary log)3.017
+F(writes ha)108 331.2 Q .3 -.15(ve b)-.2 H(een written to disk.).15 E 1.081
+(At an)108 348 R 3.581(yt)-.15 G 1.081(ime, the application may call)142.232
+348 R F1(txn_abort)3.581 E F0 3.581(,w).68 G 1.081
+(hich will result in the appropriate calls to the)318.828 348 R F1 -.37(re)
+3.582 G(co).37 E(ver)-.1 E F0 .278(routine to restore the `)108 360 R
+(`database')-.74 E 2.778('t)-.74 G 2.778(oac)246.48 360 S .278
+(onsistent pre-transaction state.)265.916 360 R .277(\(The reco)5.277 F -.15
+(ve)-.15 G 2.777(rr).15 G .277(outine must be able to)450.562 360 R
+(either reapply or undo the update depending on the conte)108 372 Q
+(xt, for each dif)-.15 E(ferent type of log record.\))-.25 E .746
+(If the application should crash, the reco)108 388.8 R -.15(ve)-.15 G .746
+(ry process uses the).15 F F1(db_lo)3.246 E(g)-.1 E F0(interf)3.246 E .746
+(ace to read the log and call the)-.1 F F1 -.37(re)108 400.8 S(co).37 E(ver)-.1
+E F0(routine to restore the database to a consistent state.)2.5 E(The)108 417.6
+Q F1(txn_pr)3.098 E(epar)-.37 E(e)-.37 E F0 .598(function pro)3.098 F .598
+(vides the core functionality to implement distrib)-.15 F .597
+(uted transactions, b)-.2 F .597(ut it does)-.2 F .36
+(not actually manage the noti\214cation of distrib)108 429.6 R .36
+(uted transaction managers.)-.2 F .36(The caller is responsible for issu-)5.36
+F(ing)108 441.6 Q F1(txn_pr)2.82 E(epar)-.37 E(e)-.37 E F0 .32
+(calls to all sites participating in the transaction.)2.82 F .319
+(If all responses are positi)5.319 F -.15(ve)-.25 G 2.819(,t).15 G .319
+(he caller can)488.832 441.6 R .822(issue a)108 453.6 R F1(txn_commit)3.322 E
+F0 5.822(.I).68 G 3.322(fa)198.076 453.6 S 1.122 -.15(ny o)209.168 453.6 T
+3.322(ft).15 G .822(he responses are ne)236.772 453.6 R -.05(ga)-.15 G(ti).05 E
+-.15(ve)-.25 G 3.322(,t).15 G .823(he caller should issue a)349.15 453.6 R F1
+(txn_abort)3.323 E F0 5.823(.I).68 G 3.323(ng)499.747 453.6 S(eneral,)513.07
+453.6 Q(the)108 465.6 Q F1(txn_pr)2.5 E(epar)-.37 E(e)-.37 E F0
+(call requires that the transaction log be \215ushed to disk.)2.5 E .821
+(The structure of the transaction support allo)108 482.4 R .821
+(ws application designers to trade of)-.25 F 3.32(fp)-.25 G .82
+(erformance and protec-)445.07 482.4 R 3.948(tion. Since)108 494.4 R 1.448
+(DB manages man)3.948 F 3.948(ys)-.15 G 1.448(tructures in shared memory)245.36
+494.4 R 3.948(,i)-.65 G 1.448(ts information is subject to corruption by)
+367.982 494.4 R 1.306(applications when the library is link)108 506.4 R 1.306
+(ed directly with the application.)-.1 F -.15(Fo)6.306 G 3.805(rt).15 G 1.305
+(his reason, DB is designed to)416.815 506.4 R(allo)108 518.4 Q 3.367(wc)-.25 G
+.867(ompilation into a separate serv)137.777 518.4 R .868
+(er process that may be accessed via a sock)-.15 F .868(et interf)-.1 F 3.368
+(ace. In)-.1 F .868(this w)3.368 F(ay)-.1 E(DB')108 530.4 Q 2.828(sd)-.55 G
+.328(ata structures are protected from application code, b)136.388 530.4 R .328
+(ut communication o)-.2 F -.15(ve)-.15 G .327(rhead is increased.).15 F(When)
+5.327 E(applications are trusted, DB may be compiled directly into the applica\
+tion for increased performance.)108 542.4 Q F2(ERR)72 559.2 Q(ORS)-.27 E F0
+(The)108 571.2 Q F1(txn_cr)4.113 E(eate)-.37 E F0 1.613(function may f)4.113 F
+1.613(ail and set)-.1 F F1(errno)4.113 E F0 1.614(for an)4.113 F 4.114(yo)-.15
+G 4.114(ft)349.022 571.2 S 1.614
+(he errors speci\214ed for the library functions)359.246 571.2 R F1(open)108
+583.2 Q F0(\(2\),).24 E F1(write)2.5 E F0(\(2\),).18 E F1(malloc)2.5 E F0
+(\(3\),).31 E F1(loc)2.5 E(k_cr)-.2 E(eate)-.37 E F0(\(3\), and).18 E F1(lo)2.5
+E(g_cr)-.1 E(eate)-.37 E F0(\(3\).).18 E(The)108 600 Q F1(txn_open)2.509 E F0
+.009(function may f)2.509 F .009(ail and set)-.1 F F1(errno)2.508 E F0 .008
+(to an)2.508 F 2.508(yo)-.15 G 2.508(ft)323.916 600 S .008
+(he errors speci\214ed for the library functions)332.534 600 R F1(open)2.508 E
+F0(\(2\),).24 E F1(write)108 612 Q F0(\(2\),).18 E F1(malloc)2.5 E F0(\(3\),)
+.31 E F1(loc)2.5 E(k_open)-.2 E F0(\(3\), and).24 E F1(lo)2.5 E(g_open)-.1 E F0
+(\(3\).).24 E(The)108 628.8 Q F1(txn_be)2.671 E(gin)-.4 E F0 .171
+(function may f)2.671 F .171(ail and set)-.1 F F1(errno)2.671 E F0 .171
+(to ENOSPC indicating that the maximum number of concur)2.671 F(-)-.2 E
+(rent transactions has been reached.)108 640.8 Q(The)108 657.6 Q F1(txn_commit)
+2.5 E F0(function may f)2.5 E(ail and set)-.1 E F1(errno)2.5 E F0(to EINV)2.5 E
+(AL indicating that the transaction w)-1.35 E(as aborted.)-.1 E(The)108 674.4 Q
+F1(txn_close)4.582 E F0 2.082(function may f)4.582 F 2.081(ail and set)-.1 F F1
+(errno)4.581 E F0 2.081(to an)4.581 F 4.581(yo)-.15 G 4.581(ft)345.753 674.4 S
+2.081(he errors speci\214ed for the library functions)356.444 674.4 R F1(close)
+108 686.4 Q F0(\(2\),).18 E F1 -.37(re)2.5 G(ad).37 E F0(\(2\),).77 E F1(write)
+2.5 E F0(\(2\),).18 E F1(fr)2.5 E(ee)-.37 E F0(\(3\),).18 E F1(fsync)2.5 E F0
+(\(2\),).31 E F1(loc)2.5 E(k_close)-.2 E F0(\(3\) or).18 E F1(lo)2.5 E(g_close)
+-.1 E F0(\(3\).).18 E(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57
+732 Q 99.315(ution August)-.2 F(1, 1995)2.5 E(3)535 732 Q EP
+%%Page: 4 28
+%%BeginPageSetup
+BP
+%%EndPageSetup
+/F0 10/Times-Roman@0 SF 124.57(DB_TXN\(3\) BSD)72 48 R(Programmer')2.5 E 2.5
+(sM)-.55 G 124.57(anual DB_TXN\(3\))340.17 48 R(The)108 84 Q/F1 10
+/Times-Italic@0 SF(txn_unlink)4.319 E F0 1.819(function may f)4.319 F 1.819
+(ail and set)-.1 F F1(errno)4.319 E F0 1.819(to an)4.319 F 4.319(yo)-.15 G 4.32
+(ft)347.58 84 S 1.82(he errors speci\214ed for the library functions)358.01 84
+R F1(unlink)108 96 Q F0(\(2\),).67 E F1(loc)2.5 E(k_unlink)-.2 E F0(\(3\), and)
+.67 E F1(lo)2.5 E(g_unlink)-.1 E F0(\(3\), or the follo).67 E(wing:)-.25 E([EB)
+108 112.8 Q(USY])-.1 E(The transaction re)133 124.8 Q(gion w)-.15 E
+(as in use and the force \215ag w)-.1 E(as not set.)-.1 E/F2 9/Times-Bold@0 SF
+(SEE ALSO)72 141.6 Q F1(db_btr)108 153.6 Q(ee)-.37 E F0(\(3\),).18 E F1
+(db_hash)2.5 E F0(\(3\),).28 E F1(db_loc)2.5 E(k)-.2 E F0(\(3\),).67 E F1
+(db_lo)2.5 E(g)-.1 E F0(\(3\),).22 E F1(db_mpool)2.5 E F0(\(3\),).51 E F1
+(db_open)2.5 E F0(\(3\),).24 E F1(db_r)2.5 E(ecno)-.37 E F0(\(3\)).18 E F1 .904
+(LIBTP: P)108 177.6 R(ortable)-.8 E 3.404(,M)-.1 G .904(odular T)189.738 177.6
+R -.15(ra)-.55 G .904(nsactions for UNIX).15 F F0 3.404(,M).94 G(ar)328.884
+177.6 Q .904(go Seltzer)-.18 F 3.403(,M)-.4 G .903
+(ichael Olson, USENIX proceedings,)392.041 177.6 R -.4(Wi)108 189.6 S
+(nter 1992.).4 E F2 -.09(BU)72 206.4 S(GS).09 E F0(The)108 218.4 Q F1(maxtxns)
+2.792 E F0 .292(parameter is a kluge, and should be deleted in f)2.792 F -.2
+(avo)-.1 G 2.793(ro).2 G 2.793(fd)378.448 218.4 S .293(ynamically e)389.571
+218.4 R .293(xpanding the transaction)-.15 F(re)108 230.4 Q(gion.)-.15 E
+(4.4 Berk)72 732 Q(ele)-.1 E 2.5(yD)-.15 G(istrib)132.57 732 Q 99.315
+(ution August)-.2 F(1, 1995)2.5 E(4)535 732 Q EP
+%%Trailer
+end
+%%EOF
diff --git a/src/plugins/kdb/db2/libdb2/man/db_btree.3 b/src/plugins/kdb/db2/libdb2/man/db_btree.3
new file mode 100644
index 0000000000..25e289f3cd
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_btree.3
@@ -0,0 +1,246 @@
+.\" Copyright (c) 1990, 1993, 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_btree.3	8.11 (Berkeley) 8/1/95
+.\"
+.TH DB_BTREE 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_btree \- btree database access method
+.SH DESCRIPTION
+.so db.so
+.GN
+specific details of the btree access method.
+.PP
+The btree data structure is a sorted, balanced tree structure storing
+associated key/data pairs.
+Searches, insertions, and deletions in the btree will all complete in
+O lg base N where base is the average fill factor.
+Often, inserting ordered data into btrees results in a low fill factor.
+This implementation has been modified to make ordered insertion the best
+case, resulting in a much better than normal page fill factor.
+.SH "ACCESS METHOD SPECIFIC INFORMATION"
+The btree access method specific data structure provided to
+.I db_open
+is typedef'd and named BTREEINFO.
+A BTREEINFO structure has at least the following fields,
+which may be initialized before calling
+.IR db_open :
+.TP 5
+u_int cachesize;
+A suggested maximum size (in bytes) of the memory cache.
+This value is
+.B only
+advisory, and the access method will allocate more memory rather than fail.
+Since every search examines the root page of the tree, caching the most
+recently used pages substantially improves access time.
+In addition, physical writes are delayed as long as possible, so a moderate
+cache can reduce the number of I/O operations significantly.
+Obviously, using a cache increases (but only increases) the likelihood of
+corruption or lost data if the system crashes while a tree is being modified.
+If
+.I cachesize
+is 0 (no size is specified) a default cache is used.
+.TP 5
+int (*compare)(const DBT *, const DBT *);
+Compare is the key comparison function.
+It must return an integer less than, equal to, or greater than zero if the
+first key argument is considered to be respectively less than, equal to,
+or greater than the second key argument.
+The same comparison function must be used on a given tree every time it
+is opened.
+If
+.I compare
+is NULL (no comparison function is specified), the keys are compared
+lexically, with shorter keys considered less than longer keys.
+.TP 5
+u_long flags;
+The flag value is specified by
+.IR or 'ing
+any of the following values:
+.RS
+.TP 5
+R_DUP
+Permit duplicate keys in the tree, i.e. permit insertion if the key to be
+inserted already exists in the tree.
+The default behavior, as described in
+.IR db_open (3),
+is to overwrite a matching key when inserting a new key or to fail if
+the R_NOOVERWRITE flag is specified.
+The R_DUP flag is overridden by the R_NOOVERWRITE flag, and if the
+R_NOOVERWRITE flag is specified, attempts to insert duplicate keys into
+the tree will fail.
+.IP
+If the database contains duplicate keys, the order of retrieval of
+key/data pairs is undefined if the
+.I get
+function is used, however,
+.I seq
+function calls with the R_CURSOR flag set will always return the logical
+``first'' of any group of duplicate keys.
+.RE
+.TP 5
+int lorder;
+The byte order for integers in the stored database metadata.
+The number should represent the order as an integer; for example, 
+big endian order would be the number 4,321.
+If
+.I lorder
+is 0 (no order is specified) the current host order is used.
+.TP 5
+int maxkeypage;
+The maximum number of keys which will be stored on any single page.
+This functionality is not currently implemented.
+.\" The maximum number of keys which will be stored on any single page.
+.\" Because of the way the btree data structure works,
+.\" .I maxkeypage
+.\" must always be greater than or equal to 2.
+.\" If
+.\" .I maxkeypage
+.\" is 0 (no maximum number of keys is specified) the page fill factor is
+.\" made as large as possible (which is almost invariably what is wanted).
+.TP 5
+int minkeypage;
+The minimum number of keys which will be stored on any single page.
+This value is used to determine which keys will be stored on overflow
+pages, i.e. if a key or data item is longer than the pagesize divided
+by the minkeypage value, it will be stored on overflow pages instead
+of in the page itself.
+If
+.I minkeypage
+is 0 (no minimum number of keys is specified) a value of 2 is used.
+.TP 5
+size_t (*prefix)(const DBT *, const DBT *);
+Prefix is the prefix comparison function.
+If specified, this function must return the number of bytes of the second key
+argument which are necessary to determine that it is greater than the first
+key argument.
+If the keys are equal, the key length should be returned.
+Note, the usefulness of this function is very data dependent, but, in some
+data sets can produce significantly reduced tree sizes and search times.
+If
+.I prefix
+is NULL (no prefix function is specified),
+.B and
+no comparison function is specified, a default lexical comparison function
+is used.
+If
+.I prefix
+is NULL and a comparison function is specified, no prefix comparison is
+done.
+.TP 5
+u_int psize;
+Page size is the size (in bytes) of the pages used for nodes in the tree.
+The minimum page size is 512 bytes and the maximum page size is 64K.
+If
+.I psize
+is 0 (no page size is specified) a page size is chosen based on the
+underlying file system I/O block size.
+.PP
+If the file already exists (and the O_TRUNC flag is not specified), the
+values specified for the parameters flags, lorder and psize are ignored
+in favor of the values used when the tree was created.
+.SH "DB OPERATIONS"
+The functions returned by
+.I db_open
+for the btree access method are as described in
+.IR db_open (3),
+with the following exceptions and additions:
+.TP 5
+type
+The type is DB_BTREE.
+.TP 5
+del
+Space freed up by deleting key/data pairs from the tree is never reclaimed,
+although it is reused where possible.
+This means that the btree storage structure is grow-only.
+The only solutions are to avoid excessive deletions, or to create a fresh
+tree periodically from a scan of an existing one.
+.TP 5
+put
+The
+.I put
+function takes the following additional flags:
+.RS
+.TP 5
+R_SETCURSOR
+Store the key/data pair, setting or initializing the position of the
+cursor to reference it.
+.RE
+.TP 5
+seq
+Forward sequential scans of a tree are from the least key to the greatest.
+.IP
+The returned key for the
+.I seq
+function is not necessarily an exact match for the specified key in
+the btree access method.
+The returned key is the smallest key greater than or equal to the
+specified key, permitting partial key matches and range searches.
+.IP
+The
+.I seq
+function takes the following additional flags:
+.RS
+.TP 5
+R_LAST
+The last key/data pair of the database is returned, and the cursor
+is set or initialized to reference it.
+.TP 5
+R_PREV
+Retrieve the key/data pair immediately before the cursor.
+If the cursor is not yet set, this is the same as the R_LAST flag.
+.RE
+.SH ERRORS
+The
+.I btree
+access method functions may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR db_open (3).
+.SH "SEE ALSO"
+.IR db_hash (3),
+.IR db_lock (3),
+.IR db_log (3),
+.IR db_mpool (3),
+.IR db_open (3),
+.IR db_recno (3),
+.IR db_txn (3)
+.sp
+.IR "The Ubiquitous B-tree" ,
+Douglas Comer, ACM Comput. Surv. 11, 2 (June 1979), 121-138.
+.sp
+.IR "Prefix B-trees" ,
+Bayer and Unterauer, ACM Transactions on Database Systems, Vol. 2, 1
+(March 1977), 11-26.
+.sp
+.IR "The Art of Computer Programming Vol. 3: Sorting and Searching" , 
+D.E. Knuth, 1968, pp 471-480.
diff --git a/src/plugins/kdb/db2/libdb2/man/db_hash.3 b/src/plugins/kdb/db2/libdb2/man/db_hash.3
new file mode 100644
index 0000000000..adb88fca7c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_hash.3
@@ -0,0 +1,138 @@
+.\" Copyright (c) 1990, 1993, 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_hash.3	8.13 (Berkeley) 8/1/95
+.\"
+.TH DB_HASH 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_hash \- hash database access method
+.SH DESCRIPTION
+.so db.so
+.GN
+specific details of the hashing access method.
+.PP
+The hash data structure is an extensible, dynamic hashing scheme.
+Backward compatible interfaces to the functions described in
+.IR dbm (3),
+and
+.IR ndbm (3)
+are provided, however these interfaces are not compatible with
+previous file formats.
+.SH "ACCESS METHOD SPECIFIC INFORMATION"
+The hash access method specific data structure provided to
+.I db_open
+is typedef'd and named HASHINFO.
+A HASHINFO structure has at least the following fields,
+which may be initialized before calling
+.IR db_open :
+.TP 5
+u_int bsize;
+.I Bsize
+defines the hash table bucket size, and is, by default, 256 bytes.
+It may be preferable to increase the page size for disk-resident tables
+and tables with large data items.
+.TP 5
+u_int cachesize;
+A suggested maximum size, in bytes, of the memory cache.
+This value is
+.B only
+advisory, and the access method will allocate more memory rather
+than fail.
+.TP 5
+u_int ffactor;
+.I Ffactor
+indicates a desired density within the hash table.
+It is an approximation of the number of keys allowed to accumulate in any
+one bucket, determining when the hash table grows or shrinks.
+The default value is 8.
+.TP 5
+u_int32_t (*hash)(const void *, size_t);
+.I Hash
+is a user defined hash function.
+Since no hash function performs equally well on all possible data, the
+user may find that the built-in hash function does poorly on a particular
+data set.
+User specified hash functions must take two arguments (a pointer to a byte
+string and a length) and return a 32-bit quantity to be used as the hash
+value.
+.IP
+If a hash function is specified,
+.I hash_open
+will attempt to determine if the hash function specified is the same as
+the one with which the database was created, and will fail if it is not.
+.TP 5
+int lorder;
+The byte order for integers in the stored database metadata.
+The number should represent the order as an integer; for example, 
+big endian order would be the number 4,321.
+If
+.I lorder
+is 0 (no order is specified) the current host order is used.
+If the  file already exists, the specified value is ignored and the
+value specified when the tree was created is used.
+.TP 5
+u_int nelem;
+.I Nelem
+is an estimate of the final size of the hash table.
+If not set or set too low, hash tables will expand gracefully as keys
+are entered, although a slight performance degradation may be noticed.
+The default value is 1.
+.PP
+If the file already exists (and the O_TRUNC flag is not specified), the
+values specified for the parameters bsize, ffactor, lorder and nelem are
+ignored and the values specified when the tree was created are used.
+.SH "DB OPERATIONS"
+The functions returned by
+.I db_open
+for the hash access method are as described in
+.IR db_open (3).
+.SH ERRORS
+The
+.I hash
+access method functions may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR db_open (3).
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_lock (3),
+.IR db_log (3),
+.IR db_mpool (3),
+.IR db_open (3),
+.IR db_recno (3),
+.IR db_txn (3)
+.sp
+.IR "Dynamic Hash Tables" ,
+Per-Ake Larson, Communications of the ACM, April 1988.
+.sp
+.IR "A New Hash Package for UNIX" ,
+Margo Seltzer, USENIX Proceedings, Winter 1991.
diff --git a/src/plugins/kdb/db2/libdb2/man/db_lock.3 b/src/plugins/kdb/db2/libdb2/man/db_lock.3
new file mode 100644
index 0000000000..b18a38c60c
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_lock.3
@@ -0,0 +1,462 @@
+.\" Copyright (c) 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_lock.3	8.14 (Berkeley) 8/1/95
+.\"
+.TH DB_LOCK 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_lock \- general purpose lock manager
+.SH SYNOPSIS
+.nf
+.ft B
+#include <db_lock.h>
+
+int
+lock_create(const char *path, mode_t mode,
+.ti +5
+int lock_modes, const int8_t conflicts[][], u_int maxlocks);
+
+LOCK_TABLE_T *
+lock_open(const char *path);
+
+int
+lock_vec(LOCK_TABLE_T *lt, DBT *locker, struct timespec *timeout,
+.ti +5
+LOCK_REQ_T list[], int nlist, LOCK_REQ_T **elistp, DBT *conflict);
+
+int
+lock_get(LOCK_TABLE_T *lt, const DBT *locker,
+.ti +5
+const DBT *obj, const lock_mode_t lock_mode, LOCK_T **lockp);
+
+int
+lock_put(LOCK_T *lockp);
+
+int
+lock_close(LOCK_TABLE_T *lt);
+
+int
+lock_unlink(const char *path, int force);
+.ft R
+.fi
+.SH DESCRIPTION
+.so db.so
+.GN
+specific details of the locking interface.
+.PP
+.I Db_lock
+is the library interface intended to provide general-purpose locking. 
+While designed to work with the other DB functions, these functions are
+also useful for more general locking purposes.
+Locks can be shared between processes.
+.PP
+.CR "lock table" lock
+.PP
+The parameter
+.I lock_modes
+is the number of lock modes to be recognized by the lock table
+(including the ``not-granted'' mode).
+The parameter
+.I conflicts
+is an
+.I lock_modes
+by
+.I lock_modes
+array.
+A non-0 value for:
+.sp
+.ti +5
+conflicts[requested_mode][held_mode]
+.sp
+indicates that
+.I requested_mode
+and
+.I held_mode
+conflict.
+The ``not-granted'' mode must be represented by 0.
+.PP
+The include file <db_lock.h> declares two commonly used conflict arrays:
+.TP 5
+int lock_sx_n;
+.br
+.ns
+.TP 5
+const int8_t lock_sx_c[lock_sx_n][lock_sx_n];
+These variables specify a conflict array
+for a simple scheme using shared and exclusive lock modes.
+.TP 5
+int lock_g_n;
+.br
+.ns
+.TP 5
+const int8_t lock_g_c[lock_g_n][lock_g_n];
+These variables specify a conflict array that involves various intent
+lock modes (e.g. intent shared) that are used for multigranularity locking.
+.PP
+In addition,
+<db_lock.h> defines the following macros that name lock modes for use with
+the standard tables above:
+.RS
+.TP 5
+LOCK_IS
+intent shared
+.br
+.ns
+.TP 5
+LOCK_IX
+intent exclusive
+.br
+.ns
+.TP 5
+LOCK_NG
+not granted (always 0)
+.br
+.ns
+.TP 5
+LOCK_S
+shared
+.br
+.ns
+.TP 5
+LOCK_SIX
+shared/intent exclusive
+.br
+.ns
+.TP 5
+LOCK_X
+exclusive
+.RE
+.PP
+.I Maxlocks
+is the maximum number of locks to be held or requested in the table,
+and is used by
+.I lock_create
+to estimate how much space to allocate for various lock-table data
+structures.
+.PP
+.RT lock_create
+.PP
+.OP "lock table" lock
+.PP
+The function
+.I lock_vec
+atomically obtains and releases one or more locks from the designated
+table.
+The function
+.I lock_vec
+is intended to support acquisition or trading of multiple locks
+under one lock table semaphore, as is needed for lock coupling or
+in multigranularity locking for lock escalation.
+.PP
+If any of the requested locks cannot be acquired
+or any of the locks to be released cannot be released,
+no locks are acquired and no locks are released, and
+.I lock_vec
+returns an error.
+The function
+.I lock_vec
+returns 0 on success.
+If an error occurs,
+.I lock_vec
+returns one of the following values.
+In addition, if
+.I elistp
+is not NULL, it is set to point to the LOCK_REQ_T entry which
+was being processed when the error occurred.
+.TP 5
+LOCK_GET_DEADLOCK
+The specified
+.I locker
+was selected as a victim in order to resolve a deadlock.
+In this case, if the
+.I conflict
+argument is non-NULL, it is set to reference the identity of a
+locker holding the lock referenced by
+.I elistp
+at the time the request was denied.
+(This identity resides in static memory and may be overwritten by
+subsequent calls to
+.IR lock_vec ).
+.TP 5
+LOCK_GET_ERROR
+An error occurred and the external variable
+.I errno
+has been set to indicate the error.
+.TP 5
+LOCK_GET_NOTHELD
+The lock cannot be released, as it was not held by the
+.IR locker .
+.TP 5
+LOCK_GET_RESOURCE
+The lock manager is unable to grant the requested locks because of
+limited internal resources.
+(Releasing locks may allow future calls to
+.I lock_vec
+to succeed.)
+.TP 5
+LOCK_GET_TIMEOUT
+A timeout argument was specified, and the requested locks were not
+available soon enough.
+In this case, if the
+.I conflict
+argument is non-NULL, it is set to reference the identity of a
+locker holding the lock referenced by
+.I elistp
+at the time the request was denied.
+(This identity resides in static memory and may be overwritten by
+subsequent calls to
+.IR lock_vec ).
+.PP
+The
+.I locker
+argument specified to
+.I lock_vec
+is a pointer to an untyped byte string which identifies the entity
+requesting or releasing the lock.
+If
+.I locker
+is NULL, the calling process' pid is used instead.
+.PP
+The
+.I timeout
+argument provided to
+.I lock_vec
+specifies a maximum interval to wait for the locks to be granted.
+If
+.I timeout
+is NULL, it is ignored, and
+.I lock_vec
+will not return until all of the locks are acquired or an error has
+occurred.
+.PP
+The
+.I list
+array provided to 
+.I lock_vec
+is typedef'd in <db_lock.h> as LOCK_REQ_T.
+A LOCK_REQ_T structure has at least the following fields,
+which must be initialized before calling
+.IR lock_vec :
+.TP 5
+enum lockop op;
+The operation to be performed, which must be set to one of the
+following values:
+.RS
+.TP 5
+LOCK_GET
+Get a lock, as defined by the values of
+.IR locker ,
+.I obj
+and
+.IR lock_mode .
+Upon return from
+.IR lock_vec ,
+if the
+.I lockp
+field is non-NULL, a reference to the acquired lock is stored there.
+(This reference is invalidated by any call to
+.I lock_vec
+or
+.I lock_put
+which releases the lock.)
+.TP 5
+LOCK_PUT
+The lock referenced by the contents of the
+.I lockp
+field is released.
+.TP 5
+LOCK_PUT_ALL
+All locks held by the
+.I locker
+are released.
+(Any locks acquired as a part of the current call to
+.I lock_vec
+are not considered for this operation).
+.TP 5
+LOCK_PUT_OBJ
+All locks held by the
+.IR locker ,
+on the object
+.IR obj ,
+with the mode specified by
+.IR lock_mode ,
+are released.
+A
+.I lock_mode
+of LOCK_NG indicates that all locks on the object should be released.
+(Any locks acquired as a part of the current call to
+.I lock_vec
+are not considered for this operation).
+.RE
+.TP 5
+const DBT obj;
+An untyped byte string which specifies the object to be locked or
+released.
+.TP 5
+const lock_mode_t lock_mode;
+The lock mode, used as an index into
+.IR lt 's
+conflict array.
+.TP 5
+LOCK_T **lockp;
+A pointer to a pointer to a lock reference.
+.PP
+The
+.I nlist
+argument specifies the number of elements in the
+.I list
+array.
+.PP
+The function
+.I lock_get
+is a simple interface to the
+.I lock_vec
+functionality, and is equivalent to calling the
+.I lock_vec
+function with the
+.I lt
+and
+.I locker
+arguments, NULL
+.IR timeout , 
+.I elistp
+and
+.I conflict
+arguments, and a single element
+.I list
+array, for which the
+.I op
+field is LOCK_GET, and the
+.IR obj ,
+.I lock_mode
+and
+.I lockp
+fields are represented by the arguments of the same name.
+Note that the type of the
+.I obj
+argument to
+.I lock_get
+is different from the
+.I obj
+element found in the LOCK_REQ_T structure.
+The
+.I lock_get
+function returns success and failure as described for the
+.I lock_vec
+function.
+.PP
+The function
+.I lock_put
+is a simple interface to the
+.I lock_vec
+functionality, and is equivalent to calling the
+.I lock_vec 
+function with a single element
+.I list
+array, for which the
+.I op
+field is LOCK_PUT and the
+.I lockp
+field is represented by the argument of the same name.
+Note that the type of the
+.I lockp
+argument to
+.I lock_put
+is different from the
+.I lockp
+element found in the LOCK_REQ_T structure.
+The
+.I lock_put
+function returns success and failure as described for the
+.I lock_vec
+function.
+.PP
+The function
+.I lock_close
+disassociates the calling process from the lock table
+.IR lt ,
+after releasing all locks held or requested by that process.
+.RT lock_close
+.PP
+.UN "lock table" lock
+.SH "ERRORS"
+The
+.I lock_create
+function may fail and set
+.I errno
+for any of the errors specified for the library routines
+.IR mmap (2),
+.IR open (2)
+and
+.IR malloc (3).
+.PP
+The
+.I lock_open
+function may fail and set
+.I errno
+for any of the errors specified for the library routine
+.IR mmap (2)
+and
+.IR open (2).
+.PP
+The
+.I lock_close
+function may fail and set
+.I errno
+for any of the errors specified for the library routine
+.IR close (2)
+and
+.IR munmap (2).
+.PP
+The
+.I lock_unlink
+function may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR unlink (2)
+or the following:
+.TP 5
+[EBUSY]
+The lock table was in use and the force flag was not set.
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_log (3),
+.IR db_mpool (3),
+.IR db_open (3),
+.IR db_recno (3),
+.IR db_txn (3)
+.SH BUGS
+The
+.I maxlocks
+parameter is a kluge, and should be deleted in favor of dynamically
+expanding the lock table.
diff --git a/src/plugins/kdb/db2/libdb2/man/db_log.3 b/src/plugins/kdb/db2/libdb2/man/db_log.3
new file mode 100644
index 0000000000..34c4d1f5d1
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_log.3
@@ -0,0 +1,290 @@
+.\" Copyright (c) 1990, 1993, 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_log.3	8.15 (Berkeley) 8/3/95
+.\"
+.TH DB_LOG 3 "August 3, 1995"
+.UC 7
+.SH NAME
+db_log \- log-manager access method
+.SH DESCRIPTION
+.so db.so
+.GN
+specific details of the logging access method.
+.PP
+These functions provide a general-purpose logging facility sufficient
+for transaction management.
+Logs can be shared by multiple processes.
+.PP
+A log is represented by the directory,
+.IR "not the file" ,
+named by the first argument to
+.IR db_open (3).
+The first argument must be non-NULL,
+and the directory must already exist
+.I db_open
+is called.
+In that directory, the log is stored in one or more files named
+in the format ``log.YYYY.MM.DD.HH.MM.SS'', where ``YYYY.MM.DD.HH.SS''
+is the approximate creation time of the log file, and is guaranteed
+to be unique in the directory.
+.PP
+The group of the created files is based on the system and directory
+defaults, and is not further specified by the log access method.
+All files are created with the
+.I mode
+specified to
+.IR db_open ,
+(as described in
+.IR chmod (2))
+and modified by the process' umask value (see
+.IR umask (2)).
+.PP
+The
+.I flags
+argument to
+.I db_open
+must be 0 for the
+.I db_log
+access method.
+.SH "ACCESS METHOD SPECIFIC INFORMATION"
+The log access method specific data structure provided to
+.I db_open
+is typedef'd and named LOGINFO.
+A LOGINFO structure has at least the following fields,
+which may be initialized before calling
+.IR db_open :
+.TP 5
+off_t max_file_size;
+The maximum size of a single file in the log.
+If not specified, the maximum size defaults to an implementation-specific
+value.
+.TP 5
+int lorder;
+The byte order for integers in the stored database metadata.
+The number should represent the order as an integer; for example, 
+big endian order would be the number 4,321.
+If
+.I lorder
+is 0 (no order is specified) the current host order is used.
+.PP
+If the log already exists, the values specified for the parameters
+max_file_size and lorder are ignored in favor of the values used
+when the log was created.
+.SH "DB OPERATIONS"
+The data part of the key/data pair used by the log access method
+is the same as for other access methods.
+The key is different.
+Each log record is identified by a log sequence number (LSN),
+which is stored in a DBT, and which is used as the
+.I key
+for all log functions that take
+.I key
+arguments.
+Applications cannot create LSN's, and all LSN's provided to functions
+as arguments must first be retrieved using the
+.I put
+or
+.I seq
+functions.
+To provide a distinguished value for applications, it is guaranteed that
+no valid LSN will ever have a size of 0.
+.PP
+Applications can compare LSN's using the
+.I log_lsn_compare
+function (see below).
+.PP
+Applications can associate LSN's with specific log files.
+The function
+.I log_lsn_file
+(see below), returns the name of the log file containing the
+record with a specified LSN.
+(The mapping of LSN to file is needed for database administration.
+For example, a transaction manager typically records the earliest LSN
+needed for restart, and the database administrator may want to archive
+log files to tape when they contain only LSN's before the earliest one
+needed for restart.)
+.PP
+Applications can truncate the log file up to a specific LSN using the 
+.I log_trunc
+function (see below).
+.PP
+The functions returned by
+.I db_open
+for the log access method are as described in
+.IR db_open ,
+with the following exceptions and additions:
+.TP 5
+type
+The type is DB_LOG.
+.TP 5
+del
+The
+.I del
+function always returns an error for the log-manager access method,
+setting
+.I errno
+to EINVAL.
+.TP 5
+int (*log_flush)(const DB *db, const DBT *lsn);
+The
+.I log_flush
+function flushes the log up to and including the log record
+.IR lsn .
+.RT log_flush
+.TP 5
+int (*log_lsn_compare)(const DB *,
+.ti +5
+const DBT *lsn1, const DBT *lsn2);
+A pointer to a function which is provided to permit applications to
+compare LSN's.
+The
+.I log_lsn_compare
+function returns an integer less than, equal to, or greater than zero
+if the first LSN is considered to be respectively less than, equal to,
+or greater than the second LSN.
+.TP 5
+int (*log_lsn_file)(const DB *db,
+.ti +5
+const DBT *lsn, char *name);
+.br
+The
+.I log_lsn_file
+function stores a pointer to the name of the file containing
+.I lsn
+in the address referenced by
+.IR name.
+This pointer is to an internal static object, and subsequent calls to
+the same function will modify the same object.
+.IP
+.RT log_lsn_file
+.TP 5
+int (*log_unlink)(const char *path, int force);
+The
+.I log_unlink
+function destroys the log represented by
+.IR path .
+If the
+.I force
+parameter is not set to 1 and there are other processes using the
+log, then
+.I log_unlink
+will return -1, setting
+.IR errno
+to EBUSY.
+If
+.I force is not set or there are no processes using the log, then all files
+used by the log are destroyed.
+.I log_unlink
+will return -1 on failure, setting
+.IR errno ,
+and 0 on success.
+.TP 5
+int (*log_trunc)(const DB *db, const DBT *lsn);
+The
+.I log_trunc
+function truncates the log up to an LSN which is less than
+.IR lsn .
+.RT log_trunc
+.TP 5
+put
+A log record containing
+.I data
+is appended to the log.
+Unlike the
+.I put
+functions for other access methods, the key parameter is not initialized
+by the application, instead, the LSN assigned to the data is returned in
+the
+.I key
+parameter.
+.IP
+The caller is responsible for providing any necessary structure to
+.I data .
+(For example, in a write-ahead logging protocol, the application must
+understand what part of
+.I data
+is an operation code, what part is redo information, and what part is
+undo information.
+In addition, most transaction managers will store in
+.I data
+the LSN of the previous log record for the same transaction,
+to support chaining back through the transaction's log records
+during undo.)
+.IP
+The parameter
+.I flag
+must be set to 0 or exactly one of the following values:
+.RS
+.TP 5
+R_CHECKPOINT
+Specify the key/data pair of the current call as the one to be returned
+when the
+.I seq
+function is next called with the R_CHECKPOINT flag.
+.TP 5
+R_FLUSH
+Flush immediately (ignoring any possibility for group commit).
+.RE
+.TP 5
+seq
+The
+.I seq
+function takes the following additional flag:
+.RS
+.TP 5
+R_CHECKPOINT
+The last key/data pair stored by the
+.I put
+function (using the R_CHECKPOINT flag) is returned,
+and the cursor is set or initialized to reference it.
+The expected use of this flag is during restart and to determine what
+part of the log must be available for restart.
+Therefore, the log record retrieved with R_CHECKPOINT should contain
+all the information that the transaction manager will need for this
+purpose.
+.RE
+.TP 5
+sync
+The
+.I sync
+function always returns an error for the log-manager access method,
+setting
+.I errno
+to EINVAL.
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_lock (3),
+.IR db_mpool (3),
+.IR db_open (3),
+.IR db_recno (3),
+.IR db_txn (3)
diff --git a/src/plugins/kdb/db2/libdb2/man/db_mpool.3 b/src/plugins/kdb/db2/libdb2/man/db_mpool.3
new file mode 100644
index 0000000000..4b683b6185
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_mpool.3
@@ -0,0 +1,403 @@
+.\" Copyright (c) 1990, 1993, 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_mpool.3	8.14 (Berkeley) 8/1/95
+.\"
+.TH DB_MPOOL 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_mpool \- general purpose shared memory buffer pool
+.SH SYNOPSIS
+.nf
+.ft B
+#include <db.h>
+#include <mpool.h>
+
+int
+mpool_create(char *path, mode_t mode, size_t cachesize, u_long flags);
+
+MPOOL *
+mpool_open(char *path);
+
+int
+mpool_close(MPOOL *mp);
+
+MPOOLFILE *
+mpool_fopen(MPOOL *mp, char *path, size_t pagesize, void *pgcookie,
+.ti +5
+int (*pgin)(MPOOLFILE *mpf,
+.ti +8
+pgno_t pgno, void *pgaddr, void *pgcookie),
+.ti +5
+int (*pgout)(MPOOLFILE *mpf,
+.ti +8
+pgno_t pgno, void *pgaddr, void *pgcookie);
+
+int
+mpool_fclose(MPOOLFILE *mpf);
+
+void *
+mpool_get(MPOOLFILE *mpf, pgno_t *pgnoaddr, u_long flags,
+.ti +5
+int (*callback)(MPOOLFILE *mpf, pgno_t pgno));
+
+int
+mpool_put(MPOOLFILE *mpf, void *pgaddr, u_long flags);
+
+int
+mpool_sync(MPOOLFILE *mpf);
+
+int
+mpool_unlink(const char *path, int force);
+
+void
+mpool_stat(MPOOL *mp, FILE *fp);
+.ft R
+.fi
+.SH DESCRIPTION
+.so db.so
+.GN
+specific details of the memory pool interface.
+.PP
+The
+.I db_mpool
+function is the library interface intended to provide general-purpose,
+page-oriented buffer management of one or more files.
+While designed to work with the other DB functions, these functions are
+also useful for more general purposes.
+The memory pools (MPOOL's) are referred to in this document as
+simply ``pools''.
+Pools may be shared between processes.
+Pools are usually filled by pages from one or more files (MPOOLFILE's).
+Pages in the pool are replaced in LRU (least-recently-used) order,
+with each new page replacing the page which has been unused the longest.
+Pages retrieved from the pool using
+.I mpool_get
+are ``pinned'' in memory, by default,
+until they are returned to the pool using the
+.I mpool_put
+function.
+.PP
+.CR "memory pool" mpool
+.PP
+The
+.I cachesize
+argument specifies the size of the pool in bytes,
+and should be the size of the normal working set of the application with
+some small amount of additional memory for unusual situations.
+If the number of bytes currently ``pinned'' in memory exceeds
+.IR cachesize ,
+the
+.I db_mpool
+functions will attempt to allocate more memory and do not necessarily fail,
+although they may suffer performance degradation.
+.PP
+The
+.I flags
+argument is set by
+.IR or 'ing
+any of the following values:
+.TP
+MPOOL_PRIVATE
+The pool is not shared by other processes or threads,
+so no locking of pool resources is required.
+.PP
+.OP "memory pool" mpool
+.PP
+The
+.I mpool_close
+function closes the pool indicated by the MPOOL pointer
+.IR mp ,
+as returned by
+.IR mpool_open .
+This function does
+.B not
+imply a call to
+.I mpool_sync
+(or to
+.IR mpool_fclose )
+i.e. no pages are written to the source file as as a result of calling
+.IR mpool_close .
+.RT mpool_close
+.PP
+The function
+.I mpool_fopen
+opens a file for buffering in the pool specified by the MPOOL
+argument.
+The
+.I path
+argument is the name of the file to be opened.
+The
+.I pagesize
+argument is the size, in bytes, of the unit of transfer between the
+application and the pool, although not necessarily the unit of transfer
+between the pool and the source file.
+Applications not knowing the page size of the source file should
+retrieve the metadata from the file using a page size that is correct
+for the metadata, then close and reopen the file, or,
+otherwise determine the page size before calling
+.IR mpool_fopen .
+.PP
+If the
+.I pgin
+function is specified, it is called each time a page is read into
+the memory pool from the source file.
+If the
+.I pgout
+function is specified, it is called each time a page is written
+to the source file.
+Both functions are called with the MPOOLFILE pointer returned from
+.IR mpool_fopen ,
+the page number, a pointer to the page being read or written, and
+the argument
+.IR pgcookie .
+If either function fails, it should return non-zero and set
+.IR errno ,
+in which case the
+.I db_mpool
+function calling it will also fail, leaving
+.I errno
+intact.
+.PP
+The
+.I mpool_fclose
+function closes the source file indicated by the MPOOLFILE pointer
+.IR mpf .
+This function does
+.B not
+imply a call to
+.IR mpool_sync ,
+i.e. no pages are written to the source file as as a result of calling
+.IR mpool_fclose .
+.RT mpool_fclose
+.\"
+.\".PP
+.\"int
+.\"mpool_fd (MPOOLFILE *mpf);
+.\"
+.\".PP
+.\"The function
+.\".I mpool_fd
+.\"takes an MPOOLFILE pointer and returns the file descriptor being
+.\"used to read/write that file
+.\"to/from the pool.
+.PP
+The function
+.I mpool_get
+returns a pointer to the page with the page number specified by
+.IR pgnoaddr ,
+from the source file specified by the MPOOLFILE pointer
+.IR mpf .
+If the page does not exist or cannot be retrieved,
+.I mpool_get
+returns NULL and sets errno.
+.PP
+The
+.I flags
+argument is set by 
+.IR or 'ing
+any of the following values:
+.TP 5
+MPOOL_CALLBACK
+After the page number has been determined, but before any other
+process or thread can access the page, the function specified by
+the
+.I callback
+argument is called.
+If the function fails, it should return non-zero and set
+.IR errno ,
+in which case
+.I mpool_get
+will also fail, leaving
+.I errno
+intact.
+The
+.I callback
+function is called with the MPOOLFILE pointer returned from
+.I mpool_fopen
+and the page number.
+This functionality is commonly used when page locking is required,
+but the page number of the page being retrieved is not known.
+.TP 5
+MPOOL_CREATE
+If the specified page does not exist, create it.
+.TP 5
+MPOOL_LAST
+Return the last page of the source file and copy its page number
+to the location referenced by
+.IR pgnoaddr .
+.TP 5
+MPOOL_NEW
+Create a new page in the file and copy its page number to the location
+referenced by
+.IR pgnoaddr .
+.TP 5
+MPOOL_NOPIN
+Don't pin the page into memory.
+(This flag is intended for debugging purposes, when it's often useful
+to examine pages which are currently held by other parts of the
+application.
+Pages retrieved in this manner don't need to be returned to the
+memory pool, i.e. they should
+.B not
+be specified as arguments to the
+.IR mpool_put
+routine.)
+.PP
+Created pages have all their bytes set to 0.
+.PP
+All pages returned by
+.I mpool_get
+(unless the MPOOL_NOPIN flag is specified),
+will be retained (i.e. ``pinned'') in the pool until a subsequent
+call to
+.IR mpool_put .
+.PP
+The function
+.I mpool_put
+indicates that the page referenced by
+.I pgaddr
+can be evicted from the pool.
+.I Pgaddr
+must be an address previously returned by
+.IR mpool_get .
+.PP
+The flag value is specified by
+.IR or 'ing
+any of the following values:
+.TP 5
+MPOOL_DIRTY
+The page has been modified and must be written to the source file
+before being evicted from the pool.
+.TP 5
+MPOOL_DISCARD
+The page is unlikely to be useful in the near future, and should be
+discarded before other pages in the pool.
+.PP
+.RT mpool_put
+.PP
+The function
+.I mpool_sync
+writes all pages associated with the MPOOLFILE pointer
+.IR mpf ,
+which were specified as arguments to the
+.I mpool_put
+function with an associated flag of
+MPOOL_DIRTY,
+to the source file.
+.RT mpool_sync
+.PP
+.UN "memory pool" mpool
+.PP
+The function
+.I mpool_stat
+writes statistics for the memory pool
+.I mp
+to the file specified by
+.IR fp .
+These statistics include the number of files participating in the pool,
+the active pages in the pool, and numbers as to how effective the cache
+has been.
+.SH ERRORS
+The
+.IR mpool_create ,
+.I mpool_open
+and
+.I mpool_fopen
+functions may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR open (2),
+.IR read (2),
+and
+.IR malloc (3).
+.PP
+The
+.I mpool_close
+and
+.I mpool_fclose
+functions may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR close (2)
+and
+.IR free (3).
+.PP
+The
+.I mpool_get
+function may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR read (2),
+.IR write (2),
+and
+.IR malloc (3)
+or the following:
+.TP 5
+[EINVAL]
+The requested page does not exist and MPOOL_CREATE was not set.
+.PP
+The
+.I mpool_put
+function may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR write (2)
+or the following:
+.TP 5
+[EACCES]
+The source file was not opened for writing.
+.PP
+The
+.I mpool_sync
+function may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR write (2).
+.PP
+The
+.I mpool_unlink
+function may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR unlink (2)
+or the following:
+.TP 5
+[EBUSY]
+The memory pool was in use and the force flag was not set.
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_lock (3),
+.IR db_log (3),
+.IR db_open (3),
+.IR db_recno (3),
+.IR db_txn (3)
diff --git a/src/plugins/kdb/db2/libdb2/man/db_open.3 b/src/plugins/kdb/db2/libdb2/man/db_open.3
new file mode 100644
index 0000000000..f988ef9245
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_open.3
@@ -0,0 +1,574 @@
+.\" Copyright (c) 1990, 1993, 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_open.3	8.15 (Berkeley) 8/1/95
+.\"
+.TH DB_OPEN 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_open \- database access methods
+.SH SYNOPSIS
+.nf
+.ft B
+#include <db.h>
+
+DB *
+db_open(const char *file, int flags, int mode,
+.ti +5
+DBTYPE type, DBINFO *dbinfo, const void *openinfo);
+.ft R
+.fi
+.SH DESCRIPTION
+.so db.so
+.GN
+the overall structure of the available access methods.
+.PP
+The currently supported file formats are btree, hashed, log and recno
+(i.e. flat-file oriented).
+The btree format is a representation of a sorted, balanced tree structure.
+The hashed format is an extensible, dynamic hashing scheme.
+The log format is a general-purpose logging facility.
+The recno format is a byte stream file with fixed or variable length
+records.
+The formats and other, format specific information are described in detail
+in their respective manual pages:
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_log (3),
+and
+.IR db_recno (3).
+.PP
+Db_open opens
+.I file
+for reading and/or writing.
+Files never intended to be preserved on disk may be created by setting
+the file parameter to NULL.
+(Note, while most of the access methods use
+.I file
+as the name of an underlying file on disk, this is not guaranteed.
+See the manual pages for the individual access methods for more
+information.)
+.PP
+The
+.I flags
+and
+.I mode arguments
+are as specified to the
+.IR open (2)
+function, however, only the O_CREAT, O_EXCL, O_EXLOCK, O_NONBLOCK,
+O_RDONLY, O_RDWR, O_SHLOCK and O_TRUNC flags are meaningful.
+(Note, opening a database file O_WRONLY is not possible.)
+.\"Three additional options may be specified by
+.\".IR or 'ing
+.\"them into the
+.\".I flags
+.\"argument.
+.\".TP
+.\"DB_LOCK
+.\"Do the necessary locking in the database to support concurrent access.
+.\"If concurrent access isn't needed or the database is read-only this
+.\"flag should not be set, as it tends to have an associated performance
+.\"penalty.
+.\".TP
+.\"DB_SHMEM
+.\"Place the underlying memory pool used by the database in shared
+.\"memory.
+.\"Necessary for concurrent access.
+.\".TP
+.\"DB_TXN
+.\"Support transactions in the database.
+.\"The DB_LOCK and DB_SHMEM flags must be set as well.
+.PP
+The
+.I type
+argument is of type DBTYPE (as defined in the <db.h> include file) and
+may be set to DB_BTREE, DB_HASH, DB_LOG or DB_RECNO.
+.PP
+The
+.I dbinfo 
+argument is a pointer to a structure containing references to locking,
+logging, transaction, and shared-memory buffer pool information.
+If 
+.I dbinfo
+is NULL, then the access method may still use these subsystems,
+but the usage will be private to the application and managed by DB.
+If
+.I dbinfo
+is non-NULL,
+then the module referenced by each of the non-NULL fields is used by DB
+as necessary.
+The fields of the DBINFO structure are defined as follows:
+.TP 5
+const char *errpfx;
+A prefix to prepend to error messages; used only if
+.I errfile
+is non-NULL.
+.TP 5
+FILE *errfile;
+The
+.IR stdio (3)
+file stream to which error messages are logged.
+.sp
+When any error occurs in the
+.I db_open
+function, or in any function called using a field of the returned DB
+structure, an error value is returned by the function,
+and the global variable
+.I errno
+is set appropriately.
+In some cases, however, the
+.I errno
+value may be insufficient to describe the cause of the error.
+In these cases, if
+.I errfile
+is non-NULL, additional error information will be written to the file
+stream it represents, preceded by the string, if any, specified by
+.IR errpfx .
+This error logging facility should not be required for normal operation,
+but may be useful in debugging applications.
+.TP 5
+char *errbuf;
+The buffer to which error messages are copied.
+If non-NULL,
+.I errbuf
+behaves as described for
+.IR errfile ,
+except that the
+.I errpfx
+field is ignored and the error message is copied into the specified
+buffer instead of being written to the FILE stream.
+The DB routines assume that the associated buffer is at least 1024 bytes
+in length.
+.TP 5
+LOCK_TABLE_T *lockinfo;
+If locking is required for the file being opened (as in the case of
+buffers being maintained in a shared memory buffer pool),
+the
+.I lockinfo
+field contains a return value from the function
+.I lock_open
+that should be used
+(see
+.IR db_lock (3)).
+If
+.I lockinfo
+is NULL, no locking is done.
+.TP 5
+DB *loginfo;
+If modifications to the file being opened should be logged, the
+.I loginfo
+field contains a return value from the function
+.IR dbopen ,
+when opening a DB file of type DB_LOG.
+If
+.I loginfo
+is NULL, no logging is done.
+.TP 5
+MPOOL *mpoolinfo;
+If the cache for the file being opened should be maintained in a shared
+buffer pool, the
+.I mpoolinfo
+field contains a return value from the function 
+.I mpool_open
+that should be used
+(see
+.IR db_mpool (3)).
+If
+.I mpoolinfo
+is NULL, a memory pool may still be created,
+but it will be private to the application and managed by DB.
+.TP 5
+TXNMGR *txninfo;
+If the accesses to the file being opened should take place in the context
+of transactions (providing atomicity and complete error recovery), the
+.I txninfo
+field contains a return value from the function
+.I txn_open
+(see
+.IR db_txn (3)).
+If transactions are specified,
+the application is responsible for making suitable calls to 
+.IR txn_begin ,
+.IR txn_abort ,
+and
+.IR txn_commit .
+If
+.I txninfo
+is NULL, no transaction support is done.
+.PP
+The
+.I openinfo
+argument is a pointer to an access method specific structure described
+in the access method's manual page.
+If
+.I openinfo
+is NULL, each access method will use defaults appropriate for the system
+and the access method.
+.SH "KEY/DATA PAIRS"
+Access to all access methods is based on key/data pairs.
+Both keys and data are represented by the following data structure:
+.PP
+typedef struct {
+.RS
+void *data;
+.br
+size_t size;
+.RE
+} DBT;
+.PP
+The elements of the DBT structure are defined as follows:
+.TP 5
+data
+A pointer to a byte string.
+.ns
+.br
+.TP 5
+size
+The length of
+.IR data ,
+in bytes.
+.PP
+Key and data byte strings may reference strings of essentially unlimited
+length, although any two of them must fit into available memory at the
+same time.
+.PP
+The access methods provide no guarantees about byte string alignment,
+and applications are responsible for maintaining any necessary alignment.
+.SH "DB OPERATIONS"
+.I Db_open
+returns a pointer to a DB structure (as defined in the <db.h> include file)
+on success, and NULL on error.
+The DB structure describes a database type, and includes a set of functions
+to perform various actions, as described below.
+Each of these functions takes a pointer to a DB structure, and may take
+one or more DBT *'s and a flag value as well.
+Individual access methods specify additional functions and flags which
+are specific to the method.
+The fields of the DB structure are as follows:
+.TP 5
+DBTYPE type;
+The type of the underlying access method (and file format).
+.TP 5
+int (*close)(const DB *db);
+A pointer to a function to flush any cached information to disk,
+free any allocated resources, and close any underlying files.
+Since key/data pairs are cached in memory, failing to sync the
+file with the
+.I close
+or
+.I sync
+function may result in inconsistent or lost information.
+.IP
+The
+.I close
+functions return -1 on failure, setting
+.IR errno ,
+and 0 on success.
+.TP 5
+int (*del)(const DB *db, TXN *txnid,
+.ti +5
+const DBT *key, u_int flags);
+.br
+A pointer to a function to remove key/data pairs from the database.
+The key/data pair associated with the specified
+.I key
+are discarded from the database.
+.IP
+The
+.I txnid
+parameter contains a transaction ID returned from
+.IR txn_begin ,
+if the file is being accessed under transaction protection,
+or NULL if transactions are not in effect.
+.IP
+The parameter
+.I flag
+must be set to 0 or exactly one of the following values:
+.RS
+.TP 5
+R_CURSOR
+Delete the record referenced by the cursor.
+The cursor must have previously been initialized.
+.RE
+.IP
+The
+.I delete
+functions return -1 on error, setting
+.IR errno ,
+0 on success, and 1 if the specified
+.I key
+did not exist in the file.
+.TP 5
+int (*fd)(const DB *db);
+A pointer to a function which returns a file descriptor representative
+of the underlying database.
+A file descriptor referencing the same file will be returned to all
+processes which call
+.I db_open
+with the same
+.I file
+name.
+This file descriptor may be safely used as an argument to the
+.IR fcntl (2)
+and
+.IR flock (2)
+locking functions.
+The file descriptor is not necessarily associated with any of the
+underlying files used by the access method.
+No file descriptor is available for in memory databases.
+.IP
+The
+.I fd
+functions return -1 on error, setting
+.IR errno ,
+and the file descriptor on success.
+.TP 5
+int (*get)(const DB *db, TXN *txnid,
+.ti +5
+const DBT *key, DBT *data, u_int flags);
+.br
+A pointer to a function which is the interface for keyed retrieval from
+the database.
+The address and length of the data associated with the specified
+.I key
+are returned in the structure referenced by
+.IR data .
+.IP
+The
+.I txnid
+parameter contains a transaction ID returned from
+.IR txn_begin ,
+if the file is being accessed under transaction protection,
+or NULL if transactions are not in effect.
+.IP
+The
+.I get
+functions return -1 on error, setting
+.IR errno ,
+0 on success, and 1 if the
+.I key
+was not found.
+.TP 5
+int (*put)(const DB *db, TXN *txnid,
+.ti +5
+DBT *key, const DBT *data, u_int flags);
+.br
+A pointer to a function to store key/data pairs in the database.
+.IP
+The
+.I txnid
+parameter contains a transaction ID returned from
+.IR txn_begin ,
+if the file is being accessed under transaction protection,
+or NULL if transactions are not in effect.
+.IP
+The parameter
+.I flag
+must be set to 0 or exactly one of the following values:
+.RS
+.TP 5
+R_CURSOR
+Replace the key/data pair referenced by the cursor.
+The cursor must have previously been initialized.
+.TP 5
+R_NOOVERWRITE
+Enter the new key/data pair only if the key does not previously exist.
+.RE
+.IP
+The default behavior of the
+.I put
+functions is to enter the new key/data pair, replacing any previously
+existing key.
+.IP
+The
+.I put
+functions return -1 on error, setting
+.IR errno ,
+0 on success, and 1 if the R_NOOVERWRITE
+.I flag
+was set and the key already exists in the file.
+.TP 5
+int (*seq)(const DB *db, TXN *txnid,
+.ti +5
+DBT *key, DBT *data, u_int flags);
+.br
+A pointer to a function which is the interface for sequential
+retrieval from the database.
+The address and length of the key are returned in the structure
+referenced by
+.IR key ,
+and the address and length of the data are returned in the
+structure referenced
+by
+.IR data .
+.IP
+The
+.I txnid
+parameter contains a transaction ID returned from
+.IR txn_begin ,
+if the file is being accessed under transaction protection,
+or NULL if transactions are not in effect.
+.IP
+Sequential key/data pair retrieval may begin at any time, and the
+logical position of the ``cursor'' is not affected by calls to the
+.IR del ,
+.IR get ,
+.IR put ,
+or
+.I sync
+functions.
+Modifications to the database during a sequential scan will be reflected
+in the scan, i.e. records inserted behind the cursor will not be returned
+while records inserted in front of the cursor will be returned.
+.IP
+The parameter
+.I flag
+must be set to 0 or exactly one of the following values:
+.RS
+.TP 5
+R_CURSOR
+The data associated with the specified key is returned.
+This differs from the
+.I get
+functions in that it sets or initializes the cursor to the location of
+the key as well.
+.TP 5
+R_FIRST
+The first key/data pair of the database is returned, and the cursor
+is set or initialized to reference it.
+.TP 5
+R_NEXT
+Retrieve the key/data pair immediately after the cursor.
+If the cursor is not yet set, this is the same as the R_FIRST flag.
+.RE
+.IP
+The
+.I seq
+functions return -1 on error, setting
+.IR errno ,
+0 on success,
+and 1 if there are no key/data pairs less than or greater than the
+specified or current key.
+.TP 5
+int (*sync)(const DB *db, u_int flags);
+A pointer to a function to flush any cached information to disk.
+If the database is in memory only, the
+.I sync
+function has no effect and will always succeed.
+.IP
+The parameter
+.I flag
+must be set to 0 or a value specified by an access method specific
+manual page.
+.IP
+The
+.I sync
+functions return -1 on failure, setting
+.IR errno ,
+and 0 on success.
+.SH ERRORS
+The
+.I db_open
+function may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR open (2),
+.IR malloc (3)
+or the following:
+.TP 5
+[EFTYPE]
+A file is incorrectly formatted.
+.TP 5
+[EINVAL]
+A parameter has been specified (hash function, recno pad byte etc.)
+that is incompatible with the current file specification or, a flag
+to a function which is not meaningful for the function (for example,
+use of the cursor without prior initialization) or there is a mismatch
+between the version number of file and the software.
+.PP
+The
+.I close
+functions may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR close (2),
+.IR read (2),
+.IR write (2),
+.IR free (3),
+or
+.IR fsync (2).
+.PP
+The
+.IR del ,
+.IR get ,
+.I put
+and
+.I seq
+functions may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR read (2),
+.IR write (2),
+.IR free (3)
+or
+.IR malloc (3).
+.PP
+The
+.I fd
+functions will fail and set
+.I errno
+to ENOENT for in memory databases.
+.PP
+The
+.I sync
+functions may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR fsync (2).
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_lock (3),
+.IR db_log (3),
+.IR db_mpool (3),
+.IR db_recno (3),
+.IR db_txn (3)
+.SH BUGS
+The name DBT is a mnemonic for ``data base thang'', and was used
+because noone could think of a reasonable name that wasn't already
+in use somewhere else.
+.PP
+The
+.I fd
+function interface is a kluge,
+and will be deleted in a future version of the interface.
+.PP
+Only big and little endian byte order is supported.
diff --git a/src/plugins/kdb/db2/libdb2/man/db_recno.3 b/src/plugins/kdb/db2/libdb2/man/db_recno.3
new file mode 100644
index 0000000000..6b93b3f5a1
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_recno.3
@@ -0,0 +1,268 @@
+.\" Copyright (c) 1990, 1993, 1994, 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_recno.3	8.12 (Berkeley) 8/1/95
+.\"
+.TH DB_RECNO 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_recno \- record number database access method
+.SH DESCRIPTION
+.so db.so
+specific details of the recno access method.
+.SH "ACCESS METHOD SPECIFIC INFORMATION"
+The recno access method specific data structure provided to
+.I db_open
+is typedef'd and named RECNOINFO.
+A RECNOINFO structure has at least the following fields,
+which may be initialized before calling
+.IR db_open :
+.TP 5
+u_int8_t bval;
+The delimiting byte to be used to mark the end of a record for
+variable-length records, and the pad character for fixed-length
+records.
+If no value is specified, newlines (``\en'') are used to mark the end
+of variable-length records and fixed-length records are padded with
+spaces.
+.TP 5
+char *bfname;
+The recno access method stores the in-memory copies of its records
+in a btree.
+If bfname is non-NULL, it specifies the name of the btree file,
+as if specified as the file name for a
+.I db_open
+of a btree file.
+.TP 5
+u_int cachesize;
+A suggested maximum size, in bytes, of the memory cache.
+This value is
+.B only
+advisory, and the access method will allocate more memory rather than fail.
+If
+.I cachesize
+is  0 (no size is specified) a default size is used.
+.TP 5
+u_long flags;
+The flag value is specified by
+.IR or 'ing
+any of the following values:
+.RS
+.TP 5
+R_FIXEDLEN
+The records are fixed-length, not byte delimited.
+The structure element
+.I reclen
+specifies the length of the record, and the structure element
+.I bval
+is used as the pad character.
+Any records, inserted into the database, that are less than
+.I reclen
+bytes long are automatically padded.
+.TP 5
+R_NOKEY
+In the interface specified by
+.IR db_open ,
+the sequential record retrieval fills in both the caller's key and
+data structures.
+If the R_NOKEY flag is specified, the
+.I cursor
+functions are not required to fill in the key structure.
+This permits applications to retrieve records at the end of files without
+reading all of the intervening records.
+.TP 5
+R_SNAPSHOT
+This flag requires that a snapshot of the file be taken when
+.I db_open
+is called, instead of permitting any unmodified records to be read from
+the original file.
+.RE
+.TP 5
+int lorder;
+The byte order for integers in the stored database metadata.
+The number should represent the order as an integer; for example,
+big endian order would be the number 4,321.
+If
+.I lorder
+is 0 (no order is specified) the current host order is used.
+.TP 5
+u_int psize;
+The recno access method stores the in-memory copies of its records
+in a btree.
+This value is the size (in bytes) of the pages used for nodes in that tree.
+If
+.I psize
+is 0 (no page size is specified) a page size is chosen based on the
+underlying file system I/O block size.
+See
+.IR btree (3)
+for more information.
+.TP 5
+size_t reclen;
+The length of a fixed-length record.
+.SH "DB OPERATIONS"
+The data part of the key/data pair used by the recno access method
+is the same as other access methods.
+The key is different.
+The
+.I data
+field of the key should be a pointer to a memory location of type
+.IR recno_t ,
+as defined in the <db.h> include file.
+This type is normally the largest unsigned integral type available to
+the implementation.
+The
+.I size
+field of the key should be the size of that type.
+.PP
+The record number data structure is either variable or fixed-length
+records stored in a flat-file format, accessed by the logical record
+number.
+The existence of record number five requires the existence of records
+one through four, and the deletion of record number one causes
+record number five to be renumbered to record number four, as well
+as the cursor, if positioned after record number one, to shift down
+one record.
+The creation of record number five when records one through four do
+not exist causes the logical creation of them with zero-length data.
+.PP
+Because there is no meta-data associated with the underlying recno access
+method files, any changes made to the default values (e.g. fixed record
+length or byte separator value) must be explicitly specified each time the
+file is opened.
+.PP
+The functions returned by
+.I db_open
+for the btree access method are as described in
+.IR db_open (3),
+with the following exceptions and additions:
+.TP 5
+type
+The type is DB_RECNO.
+.TP 5
+put
+Using the
+.I put
+interface to create a new record will cause the creation of multiple,
+empty records if the record number is more than one greater than the
+largest record currently in the database.
+.IP
+The
+.I put
+function takes the following additional flags:
+.RS
+.TP 5
+R_IAFTER
+Append the data immediately after the data referenced by
+.IR key ,
+creating a new key/data pair.
+The record number of the appended key/data pair is returned in the
+.I key
+structure.
+.TP 5
+R_IBEFORE
+Insert the data immediately before the data referenced by
+.IR key ,
+creating a new key/data pair.
+The record number of the inserted key/data pair is returned in the
+.I key
+structure.
+.TP 5
+R_SETCURSOR
+Store the key/data pair, setting or initializing the position of the
+cursor to reference it.
+.RE
+.TP 5
+seq
+The
+.I seq
+function takes the following additional flags:
+.RS
+.TP 5
+R_LAST
+The last key/data pair of the database is returned, and the cursor
+is set or initialized to reference it.
+.TP 5
+R_PREV
+Retrieve the key/data pair immediately before the cursor.
+If the cursor is not yet set, this is the same as the R_LAST flag.
+.RE
+.IP
+If the database file is a character special file and no complete
+key/data pairs are currently available, the
+.I seq
+function returns 2.
+.TP 5
+sync
+The
+.I sync
+function takes the following additional flag:
+.RS
+.TP 5
+R_RECNOSYNC
+This flag causes the
+.I sync
+function to apply to the btree file which underlies the recno file,
+not the recno file itself.
+(See the
+.I bfname
+field of RECNOINFO
+structure, above, for more information.)
+.RE
+.SH ERRORS
+The
+.I recno
+access method functions may fail and set
+.I errno
+for any of the errors specified for the library function
+.IR db_open (3)
+or the following:
+.TP 5
+[EINVAL]
+An attempt was made to add a record to a fixed-length database that
+was too large to fit.
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_lock (3),
+.IR db_log (3),
+.IR db_mpool (3),
+.IR db_open (3),
+.IR db_txn (3)
+.sp
+.IR "Document Processing in a Relational Database System" ,
+Michael Stonebraker, Heidi Stettner, Joseph Kalash, Antonin Guttman,
+Nadene Lynn, Memorandum No. UCB/ERL M82/32, May 1982.
+.SH BUGS
+The
+.I sync
+function's R_RECNOSYNC interface is a kluge,
+and will be deleted in a future version of the interface.
diff --git a/src/plugins/kdb/db2/libdb2/man/db_txn.3 b/src/plugins/kdb/db2/libdb2/man/db_txn.3
new file mode 100644
index 0000000000..18ad64692e
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/db_txn.3
@@ -0,0 +1,373 @@
+.\" Copyright (c) 1994, 1995
+.\"	The President and Fellows of Harvard University.  All rights reserved.
+.\" Copyright (c) 1994, 1995
+.\"	Margo I. Selzer.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)db_txn.3	8.8 (Harvard) 8/1/95
+.\"
+.TH DB_TXN 3 "August 1, 1995"
+.UC 7
+.SH NAME
+db_txn \- transaction management functions
+.SH SYNOPSIS
+.nf
+.ft B
+#include <db.h>
+#include <db_lock.h>
+
+int
+txn_create(const char *path, mode_t mode, u_int maxtxns, u_int flags);
+
+TXNMGR *
+txn_open(const char *path, DBT *logp, LOCK_TABLE_T *lockp,
+.ti +5
+int (*recover)(DBT *lsn, DBT *log_entry, int isundo));
+
+TXN *
+txn_begin(TXNMGR *txnp);
+
+int
+txn_commit(TXN *tid);
+
+int
+txn_prepare(TXN *tid);
+
+int
+txn_abort(TXN *tid);
+
+int
+txn_close(TXNMGR *txnp);
+
+int
+txn_unlink(const char *path, int force);
+.ft R
+.fi
+.SH DESCRIPTION
+.so db.so
+specific details of the transaction support.
+.PP
+.I Db_txn
+is the library interface that provides transaction semantics.
+Full transaction support is provided by a collection of modules
+that provide well defined interfaces to the services required for
+transaction processing.
+These services are recovery (see
+.IR db_log (3)),
+concurrency control (see
+.IR db_lock (3)),
+and the management of shared data (see
+.IR db_mpool (3)).
+Transaction semantics can be applied to the access methods described in
+.IR db (3)
+through function call parameters.
+.PP
+The model intended for transactional use (and that is used by the
+access methods) is that write-ahead logging is provided by
+.IR db_log (3)
+to record both before- and after-image logging.
+Locking follows a two-phase protocol and is implemented by
+.IR db_lock (3).
+.PP
+.CR "transaction region" txn
+Any necessary,
+associated log and lock regions are created as well (see
+.IR db_log (3)
+and
+.IR db_lock (3)).
+.PP
+The
+.I maxtxns
+argument specifies the maximum number of simultaneous transactions that
+are supported.
+This bounds the size of backing files and is used to derive limits for
+the size of the lock region and logfiles.
+When there are more than
+.I maxtxns
+concurrent transactions, calls to
+.I txn_begin
+may fail.
+.PP
+Default locking and logging protocols are provided only if the
+backing files exist.
+If the backing files do not exist, the
+.I flags
+parameter must indicate both a logging mode and locking mode specified by 
+.IR or 'ing
+together at most one flag from each of the TXN_LOCK and TXN_LOG classes
+as follows:
+.TP 5
+TXN_LOCK_2PL
+Use two-phase locking.
+.TP 5
+TXN_LOCK_OPTIMISTIC
+Use optimistic locking (not currently implemented).
+.TP 5
+TXN_LOG_REDO
+Provide redo-only logging (not currently implemented).
+.TP 5
+TXN_LOG_UNDO
+Provide undo-only logging (not currently implemented).
+.TP 5
+TXN_LOG_UNDOREDO
+Provide undo/redo write-ahead logging.
+.PP
+.RT txn_create
+.PP
+.OP "transaction region" txn
+.PP
+The
+.I recover
+argument specifies a function that is called by
+.I txn_abort
+during transaction abort.
+This function takes three arguments:
+.TP 5
+lsn
+A log sequence number (LSN).
+.TP 5
+log_entry
+A log record.
+.TP 5
+isundo
+An undo flag set to 0 if the operation is a redo and set to 1 if the
+operation an undo.
+.PP
+As discussed in the
+.I db_log (3)
+manual page,
+the application is responsible for providing any necessary structure
+to the log record.
+For example, the application must understand what part of the log
+record is an operation code, what part is redo information, and what
+part is undo information.
+.PP
+The
+.I txn_begin 
+function creates a new transaction in the designated transaction
+manager, returning a pointer to a TXN that uniquely identifies it.
+.PP
+The
+.I txn_commit
+function ends the transaction specified by the
+.I tid
+argument.
+Any locks held by the transaction are released.
+If logging is enabled, a commit log record is written and flushed to disk.
+.PP
+The
+.I txn_abort
+function causes an abnormal termination of the transaction.
+If logging is enabled, the log is played backwards and any recovery
+operations are initiated through the
+.I recover
+function specified to
+.IR txn_open .
+After recovery is completed, all locks held by the transaction are released.
+.PP
+The 
+.I txn_close
+function detaches a process from the transaction environment specified
+by the TXNMGR pointer.
+All mapped regions are unmapped and any allocated resources are freed.
+Any uncommitted transactions are aborted.
+.PP
+.UN "transaction region" txn
+.PP
+The
+.I txn_prepare
+function initiates the beginning of a two phase commit.
+In a distributed transaction,
+the prepare directive should be issued to all participating
+transaction managers.
+Each manager must take whatever action is necessary to guarantee
+that a future call to
+.I txn_commit
+on the specified
+.I tid
+will succeed.
+.SH "SYSTEM INTEGRATION"
+This model can be applied to data bases other than the provided access
+methods.
+For example, consider an application that provides transaction semantics
+to data stored in regular files accessed using the 
+.IR read (2)
+and
+.IR write (2)
+system calls.
+The operations for which transaction protection is desired are bracketed
+by calls to
+.I txn_begin
+and
+.IR txn_commit .
+.PP
+Before data are referenced, a call is made to the lock manager,
+.IR db_lock ,
+for a lock of the appropriate type (e.g. read)
+on the object being locked.
+The object might be a page in the file, a byte, a range of bytes,
+or some key.
+Before a write is performed, the application makes a call to the
+log manager,
+.IR db_log ,
+to record enough information to redo the operation in case of
+failure after commit and to undo the operation in case of abort.
+After the log message is written, the write system calls are issued.
+After all requests are issued, the application calls
+.IR txn_commit .
+When
+.I txn_commit
+returns, the caller is guaranteed that all necessary log writes have
+been written to disk. 
+.PP
+At any time, the application may call
+.IR txn_abort ,
+which will result in the appropriate calls to the
+.I recover
+routine to restore the ``database'' to a consistent pre-transaction
+state.
+(The recover routine must be able to either reapply or undo the update
+depending on the context, for each different type of log record.)
+.PP
+If the application should crash, the recovery process uses the
+.I db_log
+interface to read the log and call the
+.I recover
+routine to restore the database to a consistent state.
+.PP
+The
+.I txn_prepare 
+function provides the core functionality to implement distributed
+transactions,
+but it does not actually manage the notification of distributed
+transaction managers.
+The caller is responsible for issuing 
+.I txn_prepare
+calls to all sites participating in the transaction.
+If all responses are positive, the caller can issue a
+.IR txn_commit .
+If any of the responses are negative, the caller should issue a
+.IR txn_abort .
+In general, the 
+.I txn_prepare
+call requires that the transaction log be flushed to disk.
+.PP
+The structure of the transaction support allows application designers
+to trade off performance and protection.
+Since DB manages many structures in shared memory,
+its information is subject to corruption by applications when the library
+is linked directly with the application.
+For this reason, DB is designed to allow compilation into a separate
+server process that may be accessed via a socket interface.
+In this way DB's data structures are protected from application code,
+but communication overhead is increased.
+When applications are trusted, DB may be compiled directly into the
+application for increased performance.
+.SH ERRORS
+The
+.I txn_create
+function may fail and set
+.I errno
+for any of the errors specified for the library functions
+.IR open (2),
+.IR write (2),
+.IR malloc (3),
+.IR lock_create (3),
+and
+.IR log_create (3).
+.PP
+The
+.I txn_open
+function may fail and set
+.I errno
+to any of the errors specified for the library functions
+.IR open (2),
+.IR write (2),
+.IR malloc (3),
+.IR lock_open (3),
+and
+.IR log_open (3).
+.PP
+The
+.I txn_begin
+function may fail and set
+.I errno
+to ENOSPC indicating that the maximum number of concurrent
+transactions has been reached.
+.PP
+The
+.I txn_commit
+function may fail and set
+.I errno
+to EINVAL indicating that the transaction was aborted.
+.PP
+The
+.I txn_close
+function may fail and set
+.I errno
+to any of the errors specified for the library functions
+.IR close (2),
+.IR read (2),
+.IR write (2),
+.IR free (3),
+.IR fsync (2),
+.IR lock_close (3)
+or
+.IR log_close (3).
+.PP
+The
+.I txn_unlink
+function may fail and set
+.I errno
+to any of the errors specified for the library functions
+.IR unlink (2),
+.IR lock_unlink (3),
+and
+.IR log_unlink (3),
+or the following:
+.TP 5
+[EBUSY]
+The transaction region was in use and the force flag was not set.
+.SH "SEE ALSO"
+.IR db_btree (3),
+.IR db_hash (3),
+.IR db_lock (3),
+.IR db_log (3),
+.IR db_mpool (3),
+.IR db_open (3),
+.IR db_recno (3)
+.sp
+.IR "LIBTP: Portable, Modular Transactions for UNIX" ,
+Margo Seltzer, Michael Olson, USENIX proceedings, Winter 1992.
+.SH BUGS
+The
+.I maxtxns
+parameter is a kluge, and should be deleted in favor of dynamically
+expanding the transaction region.
diff --git a/src/plugins/kdb/db2/libdb2/man/spell.ok b/src/plugins/kdb/db2/libdb2/man/spell.ok
new file mode 100644
index 0000000000..794b00bf87
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/man/spell.ok
@@ -0,0 +1,170 @@
+Ake
+Antonin
+BTREE
+BTREEINFO
+Bsize
+CALLBACK
+Comput
+D.E
+DB
+DB's
+DBINFO
+DBT
+DBTYPE
+Db
+EACCES
+EBUSY
+EFTYPE
+EINVAL
+ENOENT
+ENOSPC
+ERL
+EXCL
+EXLOCK
+FIXEDLEN
+Ffactor
+Guttman
+HASHINFO
+Heidi
+IAFTER
+IBEFORE
+Kalash
+Knuth
+LIBTP
+LOGINFO
+LRU
+LSN
+LSN's
+MPOOL
+MPOOL's
+MPOOLFILE
+MPOOLFILE's
+Maxlocks
+Mpool
+NG
+NOKEY
+NOOVERWRITE
+NOPIN
+NOTHELD
+Nadene
+Nelem
+Nelems
+OBJ
+Pgaddr
+RDONLY
+RDWR
+RECNO
+RECNOINFO
+RECNOSYNC
+REQ
+SETCURSOR
+SHLOCK
+Stettner
+Stonebraker
+Surv
+TMPDIR
+TRUNC
+TXN
+TXNMGR
+Txn
+UCB
+UNDOREDO
+USENIX
+Unterauer
+Vol
+WAL
+WRONLY
+XACT
+YYYY.MM.DD.HH.SS
+al
+bfname
+bsize
+btree
+btrees
+bval
+cachesize
+callback
+const
+db
+db.h
+dbinfo
+dbopen
+del
+elistp
+endian
+enum
+errbuf
+errfile
+errno
+errpfx
+fd
+ffactor
+getv
+ing
+int
+int32
+int8
+isundo
+kluge
+lastlsn
+lg
+lock.h
+lockinfo
+lockop
+lockp
+log.YYYY.MM.DD.HH.MM.SS
+logfiles
+loginfo
+logp
+lreq
+lsn
+lsn1
+lsn2
+lt
+maxcache
+maxkeypage
+maxlocks
+maxtxns
+meta
+minkeypage
+mmap
+mpf
+mpool
+mpool.h
+mpoolinfo
+munmap
+nacquire
+nelem
+nelems
+nmodes
+noone
+nrelease
+obj
+op
+openinfo
+pathname
+pgaddr
+pgcookie
+pgin
+pgno
+pgnoaddr
+pgout
+pid
+pp
+psize
+queue.h
+reclen
+recno
+sx
+thang
+timespec
+tmp
+trunc
+txn
+txnid
+txninfo
+txnp
+typedef
+typedef'd
+vec
+writeable
diff --git a/src/plugins/kdb/db2/libdb2/mpool/Makefile.in b/src/plugins/kdb/db2/libdb2/mpool/Makefile.in
new file mode 100644
index 0000000000..9745c4e300
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/mpool/Makefile.in
@@ -0,0 +1,11 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/mpool
+mydir=mpool
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+STLIBOBJS=mpool.o
+
+LOCALINCLUDES=	-I. -I$(srcdir)/../include -I../include -I$(srcdir)/../db
+
+all-unix:: all-libobjs
+clean-unix:: clean-libobjs
+# @libobj_frag@
diff --git a/src/plugins/kdb/db2/libdb2/mpool/Makefile.inc b/src/plugins/kdb/db2/libdb2/mpool/Makefile.inc
new file mode 100644
index 0000000000..93210c89e2
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/mpool/Makefile.inc
@@ -0,0 +1,5 @@
+#	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
+
+.PATH: ${.CURDIR}/db/mpool
+
+SRCS+=	mpool.c
diff --git a/src/plugins/kdb/db2/libdb2/mpool/README b/src/plugins/kdb/db2/libdb2/mpool/README
new file mode 100644
index 0000000000..0f01fbcdb4
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/mpool/README
@@ -0,0 +1,7 @@
+#	@(#)README	8.1 (Berkeley) 6/4/93
+
+These are the current memory pool routines.
+They aren't ready for prime time, yet, and
+the interface is expected to change.
+
+--keith
diff --git a/src/plugins/kdb/db2/libdb2/mpool/mpool.c b/src/plugins/kdb/db2/libdb2/mpool/mpool.c
new file mode 100644
index 0000000000..d172f71baa
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/mpool/mpool.c
@@ -0,0 +1,514 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)mpool.c	8.7 (Berkeley) 11/2/95";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "mpool.h"
+
+static BKT *mpool_bkt __P((MPOOL *));
+static BKT *mpool_look __P((MPOOL *, db_pgno_t));
+static int  mpool_write __P((MPOOL *, BKT *));
+
+/*
+ * mpool_open --
+ *	Initialize a memory pool.
+ */
+MPOOL *
+mpool_open(key, fd, pagesize, maxcache)
+	void *key;
+	int fd;
+	db_pgno_t pagesize, maxcache;
+{
+	struct stat sb;
+	MPOOL *mp;
+	int entry;
+
+	/*
+	 * Get information about the file.
+	 *
+	 * XXX
+	 * We don't currently handle pipes, although we should.
+	 */
+	if (fstat(fd, &sb))
+		return (NULL);
+	if (!S_ISREG(sb.st_mode)) {
+		errno = ESPIPE;
+		return (NULL);
+	}
+
+	/* Allocate and initialize the MPOOL cookie. */
+	if ((mp = (MPOOL *)calloc(1, sizeof(MPOOL))) == NULL)
+		return (NULL);
+	CIRCLEQ_INIT(&mp->lqh);
+	for (entry = 0; entry < HASHSIZE; ++entry)
+		CIRCLEQ_INIT(&mp->hqh[entry]);
+	mp->maxcache = maxcache;
+	mp->npages = sb.st_size / pagesize;
+	mp->pagesize = pagesize;
+	mp->fd = fd;
+	return (mp);
+}
+
+/*
+ * mpool_filter --
+ *	Initialize input/output filters.
+ */
+void
+mpool_filter(mp, pgin, pgout, pgcookie)
+	MPOOL *mp;
+	void (*pgin) __P((void *, db_pgno_t, void *));
+	void (*pgout) __P((void *, db_pgno_t, void *));
+	void *pgcookie;
+{
+	mp->pgin = pgin;
+	mp->pgout = pgout;
+	mp->pgcookie = pgcookie;
+}
+	
+/*
+ * mpool_new --
+ *	Get a new page of memory.
+ */
+void *
+mpool_new(mp, pgnoaddr, flags)
+	MPOOL *mp;
+	db_pgno_t *pgnoaddr;
+	u_int flags;
+{
+	struct _hqh *head;
+	BKT *bp;
+
+	if (mp->npages == MAX_PAGE_NUMBER) {
+		(void)fprintf(stderr, "mpool_new: page allocation overflow.\n");
+		abort();
+	}
+#ifdef STATISTICS
+	++mp->pagenew;
+#endif
+	/*
+	 * Get a BKT from the cache.  Assign a new page number, attach
+	 * it to the head of the hash chain, the tail of the lru chain,
+	 * and return.
+	 */
+	if ((bp = mpool_bkt(mp)) == NULL)
+		return (NULL);
+	if (flags == MPOOL_PAGE_REQUEST) {
+		mp->npages++;
+		bp->pgno = *pgnoaddr;
+	} else
+		bp->pgno = *pgnoaddr = mp->npages++;
+
+	bp->flags = MPOOL_PINNED | MPOOL_INUSE;
+
+	head = &mp->hqh[HASHKEY(bp->pgno)];
+	CIRCLEQ_INSERT_HEAD(head, bp, hq);
+	CIRCLEQ_INSERT_TAIL(&mp->lqh, bp, q);
+	return (bp->page);
+}
+
+int
+mpool_delete(mp, page)
+	MPOOL *mp;
+	void *page;
+{
+	struct _hqh *head;
+	BKT *bp;
+
+	bp = (BKT *)((char *)page - sizeof(BKT));
+
+#ifdef DEBUG
+	if (!(bp->flags & MPOOL_PINNED)) {
+		(void)fprintf(stderr,
+		    "mpool_delete: page %d not pinned\n", bp->pgno);
+		abort();
+	}
+#endif
+
+	/* Remove from the hash and lru queues. */
+	head = &mp->hqh[HASHKEY(bp->pgno)];
+	CIRCLEQ_REMOVE(head, bp, hq);
+	CIRCLEQ_REMOVE(&mp->lqh, bp, q);
+
+	free(bp);
+	return (RET_SUCCESS);
+}	
+	
+/*
+ * mpool_get
+ *	Get a page.
+ */
+void *
+mpool_get(mp, pgno, flags)
+	MPOOL *mp;
+	db_pgno_t pgno;
+	u_int flags;				/* XXX not used? */
+{
+	struct _hqh *head;
+	BKT *bp;
+	off_t off;
+	int nr;
+
+#ifdef STATISTICS
+	++mp->pageget;
+#endif
+
+	/* Check for a page that is cached. */
+	if ((bp = mpool_look(mp, pgno)) != NULL) {
+#ifdef DEBUG
+		if (!(flags & MPOOL_IGNOREPIN) && bp->flags & MPOOL_PINNED) {
+			(void)fprintf(stderr,
+			    "mpool_get: page %d already pinned\n", bp->pgno);
+			abort();
+		}
+#endif
+		/*
+		 * Move the page to the head of the hash chain and the tail
+		 * of the lru chain.
+		 */
+		head = &mp->hqh[HASHKEY(bp->pgno)];
+		CIRCLEQ_REMOVE(head, bp, hq);
+		CIRCLEQ_INSERT_HEAD(head, bp, hq);
+		CIRCLEQ_REMOVE(&mp->lqh, bp, q);
+		CIRCLEQ_INSERT_TAIL(&mp->lqh, bp, q);
+
+		/* Return a pinned page. */
+		bp->flags |= MPOOL_PINNED;
+		return (bp->page);
+	}
+
+	/* Get a page from the cache. */
+	if ((bp = mpool_bkt(mp)) == NULL)
+		return (NULL);
+
+	/* Read in the contents. */
+#ifdef STATISTICS
+	++mp->pageread;
+#endif
+	off = mp->pagesize * pgno;
+	if (off / mp->pagesize != pgno) {
+	    /* Run past the end of the file, or at least the part we
+	       can address without large-file support?  */
+	    errno = E2BIG;
+	    return NULL;
+	}
+	if (lseek(mp->fd, off, SEEK_SET) != off)
+		return (NULL);
+
+	if ((nr = read(mp->fd, bp->page, mp->pagesize)) != mp->pagesize) {
+		if (nr > 0) {
+			/* A partial read is definitely bad. */
+			errno = EINVAL;
+			return (NULL);
+		} else {
+			/*
+			 * A zero-length reads, means you need to create a
+			 * new page.
+			 */
+			memset(bp->page, 0, mp->pagesize);
+		}
+	}
+
+	/* Set the page number, pin the page. */
+	bp->pgno = pgno;
+	if (!(flags & MPOOL_IGNOREPIN))
+		bp->flags = MPOOL_PINNED;
+	bp->flags |= MPOOL_INUSE;
+
+	/*
+	 * Add the page to the head of the hash chain and the tail
+	 * of the lru chain.
+	 */
+	head = &mp->hqh[HASHKEY(bp->pgno)];
+	CIRCLEQ_INSERT_HEAD(head, bp, hq);
+	CIRCLEQ_INSERT_TAIL(&mp->lqh, bp, q);
+
+	/* Run through the user's filter. */
+	if (mp->pgin != NULL)
+		(mp->pgin)(mp->pgcookie, bp->pgno, bp->page);
+
+	return (bp->page);
+}
+
+/*
+ * mpool_put
+ *	Return a page.
+ */
+int
+mpool_put(mp, page, flags)
+	MPOOL *mp;
+	void *page;
+	u_int flags;
+{
+	BKT *bp;
+
+#ifdef STATISTICS
+	++mp->pageput;
+#endif
+	bp = (BKT *)((char *)page - sizeof(BKT));
+#ifdef DEBUG
+	if (!(bp->flags & MPOOL_PINNED)) {
+		(void)fprintf(stderr,
+		    "mpool_put: page %d not pinned\n", bp->pgno);
+		abort();
+	}
+#endif
+	bp->flags &= ~MPOOL_PINNED;
+	if (flags & MPOOL_DIRTY)
+		bp->flags |= flags & MPOOL_DIRTY;
+	return (RET_SUCCESS);
+}
+
+/*
+ * mpool_close
+ *	Close the buffer pool.
+ */
+int
+mpool_close(mp)
+	MPOOL *mp;
+{
+	BKT *bp;
+
+	/* Free up any space allocated to the lru pages. */
+	while ((bp = mp->lqh.cqh_first) != (void *)&mp->lqh) {
+		CIRCLEQ_REMOVE(&mp->lqh, mp->lqh.cqh_first, q);
+		free(bp);
+	}
+
+	/* Free the MPOOL cookie. */
+	free(mp);
+	return (RET_SUCCESS);
+}
+
+/*
+ * mpool_sync
+ *	Sync the pool to disk.
+ */
+int
+mpool_sync(mp)
+	MPOOL *mp;
+{
+	BKT *bp;
+
+	/* Walk the lru chain, flushing any dirty pages to disk. */
+	for (bp = mp->lqh.cqh_first;
+	    bp != (void *)&mp->lqh; bp = bp->q.cqe_next)
+		if (bp->flags & MPOOL_DIRTY &&
+		    mpool_write(mp, bp) == RET_ERROR)
+			return (RET_ERROR);
+
+	/* Sync the file descriptor. */
+	return (fsync(mp->fd) ? RET_ERROR : RET_SUCCESS);
+}
+
+/*
+ * mpool_bkt
+ *	Get a page from the cache (or create one).
+ */
+static BKT *
+mpool_bkt(mp)
+	MPOOL *mp;
+{
+	struct _hqh *head;
+	BKT *bp;
+
+	/* If under the max cached, always create a new page. */
+	if (mp->curcache < mp->maxcache)
+		goto new;
+
+	/*
+	 * If the cache is max'd out, walk the lru list for a buffer we
+	 * can flush.  If we find one, write it (if necessary) and take it
+	 * off any lists.  If we don't find anything we grow the cache anyway.
+	 * The cache never shrinks.
+	 */
+	for (bp = mp->lqh.cqh_first;
+	    bp != (void *)&mp->lqh; bp = bp->q.cqe_next)
+		if (!(bp->flags & MPOOL_PINNED)) {
+			/* Flush if dirty. */
+			if (bp->flags & MPOOL_DIRTY &&
+			    mpool_write(mp, bp) == RET_ERROR)
+				return (NULL);
+#ifdef STATISTICS
+			++mp->pageflush;
+#endif
+			/* Remove from the hash and lru queues. */
+			head = &mp->hqh[HASHKEY(bp->pgno)];
+			CIRCLEQ_REMOVE(head, bp, hq);
+			CIRCLEQ_REMOVE(&mp->lqh, bp, q);
+#ifdef DEBUG
+			{ void *spage;
+				spage = bp->page;
+				memset(bp, 0xff, sizeof(BKT) + mp->pagesize);
+				bp->page = spage;
+			}
+#endif
+			bp->flags = 0;
+			return (bp);
+		}
+
+new:	if ((bp = (BKT *)malloc(sizeof(BKT) + mp->pagesize)) == NULL)
+		return (NULL);
+#ifdef STATISTICS
+	++mp->pagealloc;
+#endif
+#if defined(DEBUG) || defined(PURIFY)
+	memset(bp, 0xff, sizeof(BKT) + mp->pagesize);
+#endif
+	bp->page = (char *)bp + sizeof(BKT);
+	bp->flags = 0;
+	++mp->curcache;
+	return (bp);
+}
+
+/*
+ * mpool_write
+ *	Write a page to disk.
+ */
+static int
+mpool_write(mp, bp)
+	MPOOL *mp;
+	BKT *bp;
+{
+	off_t off;
+
+#ifdef STATISTICS
+	++mp->pagewrite;
+#endif
+
+	/* Run through the user's filter. */
+	if (mp->pgout)
+		(mp->pgout)(mp->pgcookie, bp->pgno, bp->page);
+
+	off = mp->pagesize * bp->pgno;
+	if (off / mp->pagesize != bp->pgno) {
+	    /* Run past the end of the file, or at least the part we
+	       can address without large-file support?  */
+	    errno = E2BIG;
+	    return RET_ERROR;
+	}
+	if (lseek(mp->fd, off, SEEK_SET) != off)
+		return (RET_ERROR);
+	if (write(mp->fd, bp->page, mp->pagesize) != mp->pagesize)
+		return (RET_ERROR);
+
+	bp->flags &= ~MPOOL_DIRTY;
+	return (RET_SUCCESS);
+}
+
+/*
+ * mpool_look
+ *	Lookup a page in the cache.
+ */
+static BKT *
+mpool_look(mp, pgno)
+	MPOOL *mp;
+	db_pgno_t pgno;
+{
+	struct _hqh *head;
+	BKT *bp;
+
+	head = &mp->hqh[HASHKEY(pgno)];
+	for (bp = head->cqh_first; bp != (void *)head; bp = bp->hq.cqe_next)
+		if ((bp->pgno == pgno) &&
+			(bp->flags & MPOOL_INUSE == MPOOL_INUSE)) {
+#ifdef STATISTICS
+			++mp->cachehit;
+#endif
+			return (bp);
+		}
+#ifdef STATISTICS
+	++mp->cachemiss;
+#endif
+	return (NULL);
+}
+
+#ifdef STATISTICS
+/*
+ * mpool_stat
+ *	Print out cache statistics.
+ */
+void
+mpool_stat(mp)
+	MPOOL *mp;
+{
+	BKT *bp;
+	int cnt;
+	char *sep;
+
+	(void)fprintf(stderr, "%lu pages in the file\n", mp->npages);
+	(void)fprintf(stderr,
+	    "page size %lu, cacheing %lu pages of %lu page max cache\n",
+	    mp->pagesize, mp->curcache, mp->maxcache);
+	(void)fprintf(stderr, "%lu page puts, %lu page gets, %lu page new\n",
+	    mp->pageput, mp->pageget, mp->pagenew);
+	(void)fprintf(stderr, "%lu page allocs, %lu page flushes\n",
+	    mp->pagealloc, mp->pageflush);
+	if (mp->cachehit + mp->cachemiss)
+		(void)fprintf(stderr,
+		    "%.0f%% cache hit rate (%lu hits, %lu misses)\n", 
+		    ((double)mp->cachehit / (mp->cachehit + mp->cachemiss))
+		    * 100, mp->cachehit, mp->cachemiss);
+	(void)fprintf(stderr, "%lu page reads, %lu page writes\n",
+	    mp->pageread, mp->pagewrite);
+
+	sep = "";
+	cnt = 0;
+	for (bp = mp->lqh.cqh_first;
+	    bp != (void *)&mp->lqh; bp = bp->q.cqe_next) {
+		(void)fprintf(stderr, "%s%d", sep, bp->pgno);
+		if (bp->flags & MPOOL_DIRTY)
+			(void)fprintf(stderr, "d");
+		if (bp->flags & MPOOL_PINNED)
+			(void)fprintf(stderr, "P");
+		if (++cnt == 10) {
+			sep = "\n";
+			cnt = 0;
+		} else
+			sep = ", ";
+			
+	}
+	(void)fprintf(stderr, "\n");
+}
+#endif
diff --git a/src/plugins/kdb/db2/libdb2/mpool/mpool.h b/src/plugins/kdb/db2/libdb2/mpool/mpool.h
new file mode 100644
index 0000000000..627ad5b368
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/mpool/mpool.h
@@ -0,0 +1,117 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)mpool.h	8.4 (Berkeley) 11/2/95
+ */
+
+#include "db-queue.h"
+
+/*
+ * The memory pool scheme is a simple one.  Each in-memory page is referenced
+ * by a bucket which is threaded in up to two of three ways.  All active pages
+ * are threaded on a hash chain (hashed by page number) and an lru chain.
+ * Inactive pages are threaded on a free chain.  Each reference to a memory
+ * pool is handed an opaque MPOOL cookie which stores all of this information.
+ */
+#define	HASHSIZE	128
+#define	HASHKEY(pgno)	((pgno - 1) % HASHSIZE)
+
+/* The BKT structures are the elements of the queues. */
+typedef struct _bkt {
+	CIRCLEQ_ENTRY(_bkt) hq;		/* hash queue */
+	CIRCLEQ_ENTRY(_bkt) q;		/* lru queue */
+	void    *page;			/* page */
+	db_pgno_t   pgno;			/* page number */
+
+#define	MPOOL_DIRTY	0x01		/* page needs to be written */
+#define	MPOOL_PINNED	0x02		/* page is pinned into memory */
+#define	MPOOL_INUSE	0x04		/* page address is valid */
+	u_int8_t flags;			/* flags */
+} BKT;
+
+typedef struct MPOOL {
+	CIRCLEQ_HEAD(_lqh, _bkt) lqh;	/* lru queue head */
+					/* hash queue array */
+	CIRCLEQ_HEAD(_hqh, _bkt) hqh[HASHSIZE];
+	db_pgno_t	curcache;		/* current number of cached pages */
+	db_pgno_t	maxcache;		/* max number of cached pages */
+	db_pgno_t	npages;			/* number of pages in the file */
+	u_long	pagesize;		/* file page size */
+	int	fd;			/* file descriptor */
+					/* page in conversion routine */
+	void    (*pgin) __P((void *, db_pgno_t, void *));
+					/* page out conversion routine */
+	void    (*pgout) __P((void *, db_pgno_t, void *));
+	void	*pgcookie;		/* cookie for page in/out routines */
+#ifdef STATISTICS
+	u_long	cachehit;
+	u_long	cachemiss;
+	u_long	pagealloc;
+	u_long	pageflush;
+	u_long	pageget;
+	u_long	pagenew;
+	u_long	pageput;
+	u_long	pageread;
+	u_long	pagewrite;
+#endif
+} MPOOL;
+
+#define	MPOOL_IGNOREPIN	0x01		/* Ignore if the page is pinned. */
+#define	MPOOL_PAGE_REQUEST	0x01	/* Allocate a new page with a
+					   specific page number. */
+#define	MPOOL_PAGE_NEXT		0x02	/* Allocate a new page with the next
+					  page number. */
+
+#define mpool_open	kdb2_mpool_open
+#define mpool_filter	kdb2_mpool_filter
+#define mpool_new	kdb2_mpool_new
+#define mpool_get	kdb2_mpool_get
+#define mpool_delete	kdb2_mpool_delete
+#define mpool_put	kdb2_mpool_put
+#define mpool_sync	kdb2_mpool_sync
+#define mpool_close	kdb2_mpool_close
+#define mpool_stat	kdb2_mpool_stat
+
+__BEGIN_DECLS
+MPOOL	*mpool_open __P((void *, int, db_pgno_t, db_pgno_t));
+void	 mpool_filter __P((MPOOL *, void (*)(void *, db_pgno_t, void *),
+	    void (*)(void *, db_pgno_t, void *), void *));
+void	*mpool_new __P((MPOOL *, db_pgno_t *, u_int));
+void	*mpool_get __P((MPOOL *, db_pgno_t, u_int));
+int	 mpool_delete __P((MPOOL *, void *));
+int	 mpool_put __P((MPOOL *, void *, u_int));
+int	 mpool_sync __P((MPOOL *));
+int	 mpool_close __P((MPOOL *));
+#ifdef STATISTICS
+void	 mpool_stat __P((MPOOL *));
+#endif
+__END_DECLS
diff --git a/src/plugins/kdb/db2/libdb2/recno/Makefile.in b/src/plugins/kdb/db2/libdb2/recno/Makefile.in
new file mode 100644
index 0000000000..4d6b9a5084
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/Makefile.in
@@ -0,0 +1,13 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/recno
+mydir=recno
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+STLIBOBJS=	rec_close.o rec_delete.o rec_get.o rec_open.o rec_put.o \
+		rec_search.o rec_seq.o rec_utils.o
+
+LOCALINCLUDES=	-I. -I$(srcdir)/../include -I../include -I$(srcdir)/../mpool \
+		-I$(srcdir)/../db
+
+all-unix:: all-libobjs
+clean-unix:: clean-libobjs
+# @libobj_frag@
diff --git a/src/plugins/kdb/db2/libdb2/recno/Makefile.inc b/src/plugins/kdb/db2/libdb2/recno/Makefile.inc
new file mode 100644
index 0000000000..e49e225522
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/Makefile.inc
@@ -0,0 +1,6 @@
+#       @(#)Makefile.inc	8.1 (Berkeley) 6/4/93
+
+.PATH: ${.CURDIR}/db/recno
+
+SRCS+=	rec_close.c rec_delete.c rec_get.c rec_open.c rec_put.c rec_search.c \
+	rec_seq.c rec_utils.c
diff --git a/src/plugins/kdb/db2/libdb2/recno/extern.h b/src/plugins/kdb/db2/libdb2/recno/extern.h
new file mode 100644
index 0000000000..98e382c37e
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/extern.h
@@ -0,0 +1,72 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)extern.h	8.3 (Berkeley) 6/4/94
+ */
+
+#include "../btree/extern.h"
+
+#define __rec_close	__kdb2_rec_close
+#define __rec_delete	__kdb2_rec_delete
+#define __rec_dleaf	__kdb2_rec_dleaf
+#define __rec_fd	__kdb2_rec_fd
+#define __rec_fmap	__kdb2_rec_fmap
+#define __rec_fout	__kdb2_rec_fout
+#define __rec_fpipe	__kdb2_rec_fpipe
+#define __rec_get	__kdb2_rec_get
+#define __rec_iput	__kdb2_rec_iput
+#define __rec_put	__kdb2_rec_put
+#define __rec_ret	__kdb2_rec_ret
+#define __rec_search	__kdb2_rec_search
+#define __rec_seq	__kdb2_rec_seq
+#define __rec_sync	__kdb2_rec_sync
+#define __rec_vmap	__kdb2_rec_vmap
+#define __rec_vout	__kdb2_rec_vout
+#define __rec_vpipe	__kdb2_rec_vpipe
+
+int	 __rec_close __P((DB *));
+int	 __rec_delete __P((const DB *, const DBT *, u_int));
+int	 __rec_dleaf __P((BTREE *, PAGE *, u_int32_t));
+int	 __rec_fd __P((const DB *));
+int	 __rec_fmap __P((BTREE *, recno_t));
+int	 __rec_fout __P((BTREE *));
+int	 __rec_fpipe __P((BTREE *, recno_t));
+int	 __rec_get __P((const DB *, const DBT *, DBT *, u_int));
+int	 __rec_iput __P((BTREE *, recno_t, const DBT *, u_int));
+int	 __rec_put __P((const DB *dbp, DBT *, const DBT *, u_int));
+int	 __rec_ret __P((BTREE *, EPG *, recno_t, DBT *, DBT *));
+EPG	*__rec_search __P((BTREE *, recno_t, enum SRCHOP));
+int	 __rec_seq __P((const DB *, DBT *, DBT *, u_int));
+int	 __rec_sync __P((const DB *, u_int));
+int	 __rec_vmap __P((BTREE *, recno_t));
+int	 __rec_vout __P((BTREE *));
+int	 __rec_vpipe __P((BTREE *, recno_t));
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_close.c b/src/plugins/kdb/db2/libdb2/recno/rec_close.c
new file mode 100644
index 0000000000..ed3da6ea42
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_close.c
@@ -0,0 +1,187 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_close.c	8.9 (Berkeley) 11/18/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/uio.h>
+#ifdef RECNO_USE_MMAP
+#include <sys/mman.h>
+#endif
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+/*
+ * __REC_CLOSE -- Close a recno tree.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_close(dbp)
+	DB *dbp;
+{
+	BTREE *t;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	if (__rec_sync(dbp, 0) == RET_ERROR)
+		return (RET_ERROR);
+
+	/* Committed to closing. */
+	status = RET_SUCCESS;
+#ifdef	RECNO_USE_MMAP
+	if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))
+		status = RET_ERROR;
+#endif
+
+	if (!F_ISSET(t, R_INMEM)) {
+		if (F_ISSET(t, R_CLOSEFP)) {
+			if (fclose(t->bt_rfp))
+				status = RET_ERROR;
+		} else
+			if (close(t->bt_rfd))
+				status = RET_ERROR;
+	}
+
+	if (__bt_close(dbp) == RET_ERROR)
+		status = RET_ERROR;
+
+	return (status);
+}
+
+/*
+ * __REC_SYNC -- sync the recno tree to disk.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_sync(dbp, flags)
+	const DB *dbp;
+	u_int flags;
+{
+	struct iovec iov[2];
+	BTREE *t;
+	DBT data, key;
+	off_t off;
+	recno_t scursor, trec;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	if (flags == R_RECNOSYNC)
+		return (__bt_sync(dbp, 0));
+
+	if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))
+		return (RET_SUCCESS);
+
+	/* Read any remaining records into the tree. */
+	if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
+		return (RET_ERROR);
+
+	/* Rewind the file descriptor. */
+	if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)
+		return (RET_ERROR);
+
+	/* Save the cursor. */
+	scursor = t->bt_cursor.rcursor;
+
+	key.size = sizeof(recno_t);
+	key.data = &trec;
+
+	if (F_ISSET(t, R_FIXLEN)) {
+		/*
+		 * We assume that fixed length records are all fixed length.
+		 * Any that aren't are either EINVAL'd or corrected by the
+		 * record put code.
+		 */
+		status = (dbp->seq)(dbp, &key, &data, R_FIRST);
+		while (status == RET_SUCCESS) {
+			if (write(t->bt_rfd, data.data, data.size) != data.size)
+				return (RET_ERROR);
+			status = (dbp->seq)(dbp, &key, &data, R_NEXT);
+		}
+	} else {
+		iov[1].iov_base = &t->bt_bval;
+		iov[1].iov_len = 1;
+
+		status = (dbp->seq)(dbp, &key, &data, R_FIRST);
+		while (status == RET_SUCCESS) {
+			iov[0].iov_base = data.data;
+			iov[0].iov_len = data.size;
+			if (writev(t->bt_rfd, iov, 2) != data.size + 1)
+				return (RET_ERROR);
+			status = (dbp->seq)(dbp, &key, &data, R_NEXT);
+		}
+	}
+
+	/* Restore the cursor. */
+	t->bt_cursor.rcursor = scursor;
+
+	if (status == RET_ERROR)
+		return (RET_ERROR);
+	if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)
+		return (RET_ERROR);
+	if (ftruncate(t->bt_rfd, off))
+		return (RET_ERROR);
+	F_CLR(t, R_MODIFIED);
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_delete.c b/src/plugins/kdb/db2/libdb2/recno/rec_delete.c
new file mode 100644
index 0000000000..b69c9ad742
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_delete.c
@@ -0,0 +1,197 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_delete.c	8.7 (Berkeley) 7/14/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+static int rec_rdelete __P((BTREE *, recno_t));
+
+/*
+ * __REC_DELETE -- Delete the item(s) referenced by a key.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key to delete
+ *	flags:	R_CURSOR if deleting what the cursor references
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+int
+__rec_delete(dbp, key, flags)
+	const DB *dbp;
+	const DBT *key;
+	u_int flags;
+{
+	BTREE *t;
+	recno_t nrec;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	switch(flags) {
+	case 0:
+		if ((nrec = *(recno_t *)key->data) == 0)
+			goto einval;
+		if (nrec > t->bt_nrecs)
+			return (RET_SPECIAL);
+		--nrec;
+		status = rec_rdelete(t, nrec);
+		break;
+	case R_CURSOR:
+		if (!F_ISSET(&t->bt_cursor, CURS_INIT))
+			goto einval;
+		if (t->bt_nrecs == 0)
+			return (RET_SPECIAL);
+		status = rec_rdelete(t, t->bt_cursor.rcursor - 1);
+		if (status == RET_SUCCESS)
+			--t->bt_cursor.rcursor;
+		break;
+	default:
+einval:		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	if (status == RET_SUCCESS)
+		F_SET(t, B_MODIFIED | R_MODIFIED);
+	return (status);
+}
+
+/*
+ * REC_RDELETE -- Delete the data matching the specified key.
+ *
+ * Parameters:
+ *	tree:	tree
+ *	nrec:	record to delete
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+static int
+rec_rdelete(t, nrec)
+	BTREE *t;
+	recno_t nrec;
+{
+	EPG *e;
+	PAGE *h;
+	int status;
+
+	/* Find the record; __rec_search pins the page. */
+	if ((e = __rec_search(t, nrec, SDELETE)) == NULL)
+		return (RET_ERROR);
+
+	/* Delete the record. */
+	h = e->page;
+	status = __rec_dleaf(t, h, e->index);
+	if (status != RET_SUCCESS) {
+		mpool_put(t->bt_mp, h, 0);
+		return (status);
+	}
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+	return (RET_SUCCESS);
+}
+
+/*
+ * __REC_DLEAF -- Delete a single record from a recno leaf page.
+ *
+ * Parameters:
+ *	t:	tree
+ *	idx:	index on current page to delete
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_dleaf(t, h, idx)
+	BTREE *t;
+	PAGE *h;
+	u_int32_t idx;
+{
+	RLEAF *rl;
+	indx_t *ip, cnt, offset;
+	u_int32_t nbytes;
+	char *from;
+	void *to;
+
+	/*
+	 * Delete a record from a recno leaf page.  Internal records are never
+	 * deleted from internal pages, regardless of the records that caused
+	 * them to be added being deleted.  Pages made empty by deletion are
+	 * not reclaimed.  They are, however, made available for reuse.
+	 *
+	 * Pack the remaining entries at the end of the page, shift the indices
+	 * down, overwriting the deleted record and its index.  If the record
+	 * uses overflow pages, make them available for reuse.
+	 */
+	to = rl = GETRLEAF(h, idx);
+	if (rl->flags & P_BIGDATA && __ovfl_delete(t, rl->bytes) == RET_ERROR)
+		return (RET_ERROR);
+	nbytes = NRLEAF(rl);
+
+	/*
+	 * Compress the key/data pairs.  Compress and adjust the [BR]LEAF
+	 * offsets.  Reset the headers.
+	 */
+	from = (char *)h + h->upper;
+	memmove(from + nbytes, from, (char *)to - from);
+	h->upper += nbytes;
+
+	offset = h->linp[idx];
+	for (cnt = &h->linp[idx] - (ip = &h->linp[0]); cnt--; ++ip)
+		if (ip[0] < offset)
+			ip[0] += nbytes;
+	for (cnt = &h->linp[NEXTINDEX(h)] - ip; --cnt; ++ip)
+		ip[0] = ip[1] < offset ? ip[1] + nbytes : ip[1];
+	h->lower -= sizeof(indx_t);
+	--t->bt_nrecs;
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_get.c b/src/plugins/kdb/db2/libdb2/recno/rec_get.c
new file mode 100644
index 0000000000..230b2d4f54
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_get.c
@@ -0,0 +1,311 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_get.c	8.9 (Berkeley) 8/18/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+/*
+ * __REC_GET -- Get a record from the btree.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key to find
+ *	data:	data to return
+ *	flag:	currently unused
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+int
+__rec_get(dbp, key, data, flags)
+	const DB *dbp;
+	const DBT *key;
+	DBT *data;
+	u_int flags;
+{
+	BTREE *t;
+	EPG *e;
+	recno_t nrec;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* Get currently doesn't take any flags, and keys of 0 are illegal. */
+	if (flags || (nrec = *(recno_t *)key->data) == 0) {
+		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	/*
+	 * If we haven't seen this record yet, try to find it in the
+	 * original file.
+	 */
+	if (nrec > t->bt_nrecs) {
+		if (F_ISSET(t, R_EOF | R_INMEM))
+			return (RET_SPECIAL);
+		if ((status = t->bt_irec(t, nrec)) != RET_SUCCESS)
+			return (status);
+	}
+
+	--nrec;
+	if ((e = __rec_search(t, nrec, SEARCH)) == NULL)
+		return (RET_ERROR);
+
+	status = __rec_ret(t, e, 0, NULL, data);
+	if (F_ISSET(t, B_DB_LOCK))
+		mpool_put(t->bt_mp, e->page, 0);
+	else
+		t->bt_pinned = e->page;
+	return (status);
+}
+
+/*
+ * __REC_FPIPE -- Get fixed length records from a pipe.
+ *
+ * Parameters:
+ *	t:	tree
+ *	cnt:	records to read
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_fpipe(t, top)
+	BTREE *t;
+	recno_t top;
+{
+	DBT data;
+	recno_t nrec;
+	size_t len;
+	int ch;
+	u_char *p;
+
+	if (t->bt_rdata.size < t->bt_reclen) {
+		t->bt_rdata.data = t->bt_rdata.data == NULL ?
+		    malloc(t->bt_reclen) :
+		    realloc(t->bt_rdata.data, t->bt_reclen);
+		if (t->bt_rdata.data == NULL)
+			return (RET_ERROR);
+		t->bt_rdata.size = t->bt_reclen;
+	}
+	data.data = t->bt_rdata.data;
+	data.size = t->bt_reclen;
+
+	for (nrec = t->bt_nrecs; nrec < top;) {
+		len = t->bt_reclen;
+		for (p = t->bt_rdata.data;; *p++ = ch)
+			if ((ch = getc(t->bt_rfp)) == EOF || !--len) {
+				if (ch != EOF)
+					*p = ch;
+				if (len != 0)
+					memset(p, t->bt_bval, len);
+				if (__rec_iput(t,
+				    nrec, &data, 0) != RET_SUCCESS)
+					return (RET_ERROR);
+				++nrec;
+				break;
+			}
+		if (ch == EOF)
+			break;
+	}
+	if (nrec < top) {
+		F_SET(t, R_EOF);
+		return (RET_SPECIAL);
+	}
+	return (RET_SUCCESS);
+}
+
+/*
+ * __REC_VPIPE -- Get variable length records from a pipe.
+ *
+ * Parameters:
+ *	t:	tree
+ *	cnt:	records to read
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_vpipe(t, top)
+	BTREE *t;
+	recno_t top;
+{
+	DBT data;
+	recno_t nrec;
+	indx_t len;
+	size_t sz;
+	int bval, ch;
+	u_char *p;
+
+	bval = t->bt_bval;
+	for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
+		for (p = t->bt_rdata.data,
+		    sz = t->bt_rdata.size;; *p++ = ch, --sz) {
+			if ((ch = getc(t->bt_rfp)) == EOF || ch == bval) {
+				data.data = t->bt_rdata.data;
+				data.size = p - (u_char *)t->bt_rdata.data;
+				if (ch == EOF && data.size == 0)
+					break;
+				if (__rec_iput(t, nrec, &data, 0)
+				    != RET_SUCCESS)
+					return (RET_ERROR);
+				break;
+			}
+			if (sz == 0) {
+				len = p - (u_char *)t->bt_rdata.data;
+				t->bt_rdata.size += (sz = 256);
+				t->bt_rdata.data = t->bt_rdata.data == NULL ?
+				    malloc(t->bt_rdata.size) :
+				    realloc(t->bt_rdata.data, t->bt_rdata.size);
+				if (t->bt_rdata.data == NULL)
+					return (RET_ERROR);
+				p = (u_char *)t->bt_rdata.data + len;
+			}
+		}
+		if (ch == EOF)
+			break;
+	}
+	if (nrec < top) {
+		F_SET(t, R_EOF);
+		return (RET_SPECIAL);
+	}
+	return (RET_SUCCESS);
+}
+
+/*
+ * __REC_FMAP -- Get fixed length records from a file.
+ *
+ * Parameters:
+ *	t:	tree
+ *	cnt:	records to read
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_fmap(t, top)
+	BTREE *t;
+	recno_t top;
+{
+	DBT data;
+	recno_t nrec;
+	u_char *sp, *ep, *p;
+	size_t len;
+
+	if (t->bt_rdata.size < t->bt_reclen) {
+		t->bt_rdata.data = t->bt_rdata.data == NULL ?
+		    malloc(t->bt_reclen) :
+		    realloc(t->bt_rdata.data, t->bt_reclen);
+		if (t->bt_rdata.data == NULL)
+			return (RET_ERROR);
+		t->bt_rdata.size = t->bt_reclen;
+	}
+	data.data = t->bt_rdata.data;
+	data.size = t->bt_reclen;
+
+	sp = (u_char *)t->bt_cmap;
+	ep = (u_char *)t->bt_emap;
+	for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
+		if (sp >= ep) {
+			F_SET(t, R_EOF);
+			return (RET_SPECIAL);
+		}
+		len = t->bt_reclen;
+		for (p = t->bt_rdata.data;
+		    sp < ep && len > 0; *p++ = *sp++, --len);
+		if (len != 0)
+			memset(p, t->bt_bval, len);
+		if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS)
+			return (RET_ERROR);
+	}
+	t->bt_cmap = (caddr_t)sp;
+	return (RET_SUCCESS);
+}
+
+/*
+ * __REC_VMAP -- Get variable length records from a file.
+ *
+ * Parameters:
+ *	t:	tree
+ *	cnt:	records to read
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_vmap(t, top)
+	BTREE *t;
+	recno_t top;
+{
+	DBT data;
+	u_char *sp, *ep;
+	recno_t nrec;
+	int bval;
+
+	sp = (u_char *)t->bt_cmap;
+	ep = (u_char *)t->bt_emap;
+	bval = t->bt_bval;
+
+	for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
+		if (sp >= ep) {
+			F_SET(t, R_EOF);
+			return (RET_SPECIAL);
+		}
+		for (data.data = sp; sp < ep && *sp != bval; ++sp);
+		data.size = sp - (u_char *)data.data;
+		if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS)
+			return (RET_ERROR);
+		++sp;
+	}
+	t->bt_cmap = (caddr_t)sp;
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_open.c b/src/plugins/kdb/db2/libdb2/recno/rec_open.c
new file mode 100644
index 0000000000..f18a1cb028
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_open.c
@@ -0,0 +1,243 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_open.c	8.12 (Berkeley) 11/18/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#ifdef RECNO_USE_MMAP
+#include <sys/mman.h>
+#endif
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+DB *
+__rec_open(fname, flags, mode, openinfo, dflags)
+	const char *fname;
+	int flags, mode, dflags;
+	const RECNOINFO *openinfo;
+{
+	BTREE *t;
+	BTREEINFO btopeninfo;
+	DB *dbp;
+	PAGE *h;
+	struct stat sb;
+	int rfd, sverrno;
+
+	/* Open the user's file -- if this fails, we're done. */
+	if (fname != NULL && (rfd = open(fname, flags | O_BINARY, mode)) < 0)
+		return (NULL);
+
+	/* Create a btree in memory (backed by disk). */
+	dbp = NULL;
+	if (openinfo) {
+		if (openinfo->flags & ~(R_FIXEDLEN | R_NOKEY | R_SNAPSHOT))
+			goto einval;
+		btopeninfo.flags = 0;
+		btopeninfo.cachesize = openinfo->cachesize;
+		btopeninfo.maxkeypage = 0;
+		btopeninfo.minkeypage = 0;
+		btopeninfo.psize = openinfo->psize;
+		btopeninfo.compare = NULL;
+		btopeninfo.prefix = NULL;
+		btopeninfo.lorder = openinfo->lorder;
+		dbp = __bt_open(openinfo->bfname,
+		    O_RDWR | O_BINARY, S_IRUSR | S_IWUSR, &btopeninfo, dflags);
+	} else
+		dbp = __bt_open(NULL, O_RDWR | O_BINARY, S_IRUSR | S_IWUSR, NULL, dflags);
+	if (dbp == NULL)
+		goto err;
+
+	/*
+	 * Some fields in the tree structure are recno specific.  Fill them
+	 * in and make the btree structure look like a recno structure.  We
+	 * don't change the bt_ovflsize value, it's close enough and slightly
+	 * bigger.
+	 */
+	t = dbp->internal;
+	if (openinfo) {
+		if (openinfo->flags & R_FIXEDLEN) {
+			F_SET(t, R_FIXLEN);
+			t->bt_reclen = openinfo->reclen;
+			if (t->bt_reclen == 0)
+				goto einval;
+		}
+		t->bt_bval = openinfo->bval;
+	} else
+		t->bt_bval = '\n';
+
+	F_SET(t, R_RECNO);
+	if (fname == NULL)
+		F_SET(t, R_EOF | R_INMEM);
+	else
+		t->bt_rfd = rfd;
+
+	if (fname != NULL) {
+		/*
+		 * In 4.4BSD, stat(2) returns true for ISSOCK on pipes.
+		 * Unfortunately, that's not portable, so we use lseek
+		 * and check the errno values.
+		 */
+		errno = 0;
+		if (lseek(rfd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE) {
+			switch (flags & O_ACCMODE) {
+			case O_RDONLY:
+				F_SET(t, R_RDONLY);
+				break;
+			default:
+				goto einval;
+			}
+slow:			if ((t->bt_rfp = fdopen(rfd, "rb")) == NULL)
+				goto err;
+			F_SET(t, R_CLOSEFP);
+			t->bt_irec =
+			    F_ISSET(t, R_FIXLEN) ? __rec_fpipe : __rec_vpipe;
+		} else {
+			switch (flags & O_ACCMODE) {
+			case O_RDONLY:
+				F_SET(t, R_RDONLY);
+				break;
+			case O_RDWR:
+				break;
+			default:
+				goto einval;
+			}
+
+			if (fstat(rfd, &sb))
+				goto err;
+			/*
+			 * Kluge -- we'd like to test to see if the file is too
+			 * big to mmap.  Since, we don't know what size or type
+			 * off_t's or size_t's are, what the largest unsigned
+			 * integral type is, or what random insanity the local
+			 * C compiler will perpetrate, doing the comparison in
+			 * a portable way is flatly impossible.  Hope that mmap
+			 * fails if the file is too large.
+			 */
+			if (sb.st_size == 0)
+				F_SET(t, R_EOF);
+			else {
+#ifdef RECNO_USE_MMAP
+				/*
+				 * XXX
+				 * Mmap doesn't work correctly on many current
+				 * systems.  In particular, it can fail subtly,
+				 * with cache coherency problems.  Don't use it
+				 * for now.
+				 */
+				t->bt_msize = sb.st_size;
+				if ((t->bt_smap = mmap(NULL, t->bt_msize,
+				    PROT_READ, MAP_PRIVATE, rfd,
+				    (off_t)0)) == (caddr_t)-1)
+					goto slow;
+				t->bt_cmap = t->bt_smap;
+				t->bt_emap = t->bt_smap + sb.st_size;
+				t->bt_irec = F_ISSET(t, R_FIXLEN) ?
+				    __rec_fmap : __rec_vmap;
+				F_SET(t, R_MEMMAPPED);
+#else
+				goto slow;
+#endif
+			}
+		}
+	}
+
+	/* Use the recno routines. */
+	dbp->close = __rec_close;
+	dbp->del = __rec_delete;
+	dbp->fd = __rec_fd;
+	dbp->get = __rec_get;
+	dbp->put = __rec_put;
+	dbp->seq = __rec_seq;
+	dbp->sync = __rec_sync;
+
+	/* If the root page was created, reset the flags. */
+	if ((h = mpool_get(t->bt_mp, P_ROOT, 0)) == NULL)
+		goto err;
+	if ((h->flags & P_TYPE) == P_BLEAF) {
+		F_CLR(h, P_TYPE);
+		F_SET(h, P_RLEAF);
+		mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+	} else
+		mpool_put(t->bt_mp, h, 0);
+
+	if (openinfo && openinfo->flags & R_SNAPSHOT &&
+	    !F_ISSET(t, R_EOF | R_INMEM) &&
+	    t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
+                goto err;
+	return (dbp);
+
+einval:	errno = EINVAL;
+err:	sverrno = errno;
+	if (dbp != NULL)
+		(void)__bt_close(dbp);
+	if (fname != NULL)
+		(void)close(rfd);
+	errno = sverrno;
+	return (NULL);
+}
+
+int
+__rec_fd(dbp)
+	const DB *dbp;
+{
+	BTREE *t;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/* In-memory database can't have a file descriptor. */
+	if (F_ISSET(t, R_INMEM)) {
+		errno = ENOENT;
+		return (-1);
+	}
+	return (t->bt_rfd);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_put.c b/src/plugins/kdb/db2/libdb2/recno/rec_put.c
new file mode 100644
index 0000000000..e7fa75882f
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_put.c
@@ -0,0 +1,280 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_put.c	8.7 (Berkeley) 8/18/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+/*
+ * __REC_PUT -- Add a recno item to the tree.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key
+ *	data:	data
+ *	flag:	R_CURSOR, R_IAFTER, R_IBEFORE, R_NOOVERWRITE
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key is
+ *	already in the tree and R_NOOVERWRITE specified.
+ */
+int
+__rec_put(dbp, key, data, flags)
+	const DB *dbp;
+	DBT *key;
+	const DBT *data;
+	u_int flags;
+{
+	BTREE *t;
+	DBT fdata, tdata;
+	recno_t nrec;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	/*
+	 * If using fixed-length records, and the record is long, return
+	 * EINVAL.  If it's short, pad it out.  Use the record data return
+	 * memory, it's only short-term.
+	 */
+	if (F_ISSET(t, R_FIXLEN) && data->size != t->bt_reclen) {
+		if (data->size > t->bt_reclen)
+			goto einval;
+
+		if (t->bt_rdata.size < t->bt_reclen) {
+			t->bt_rdata.data = t->bt_rdata.data == NULL ?
+			    malloc(t->bt_reclen) :
+			    realloc(t->bt_rdata.data, t->bt_reclen);
+			if (t->bt_rdata.data == NULL)
+				return (RET_ERROR);
+			t->bt_rdata.size = t->bt_reclen;
+		}
+		memmove(t->bt_rdata.data, data->data, data->size);
+		memset((char *)t->bt_rdata.data + data->size,
+		    t->bt_bval, t->bt_reclen - data->size);
+		fdata.data = t->bt_rdata.data;
+		fdata.size = t->bt_reclen;
+	} else {
+		fdata.data = data->data;
+		fdata.size = data->size;
+	}
+
+	switch (flags) {
+	case R_CURSOR:
+		if (!F_ISSET(&t->bt_cursor, CURS_INIT))
+			goto einval;
+		nrec = t->bt_cursor.rcursor;
+		break;
+	case R_SETCURSOR:
+		if ((nrec = *(recno_t *)key->data) == 0)
+			goto einval;
+		break;
+	case R_IAFTER:
+		if ((nrec = *(recno_t *)key->data) == 0) {
+			nrec = 1;
+			flags = R_IBEFORE;
+		}
+		break;
+	case 0:
+	case R_IBEFORE:
+		if ((nrec = *(recno_t *)key->data) == 0)
+			goto einval;
+		break;
+	case R_NOOVERWRITE:
+		if ((nrec = *(recno_t *)key->data) == 0)
+			goto einval;
+		if (nrec <= t->bt_nrecs)
+			return (RET_SPECIAL);
+		break;
+	default:
+einval:		errno = EINVAL;
+		return (RET_ERROR);
+	}
+
+	/*
+	 * Make sure that records up to and including the put record are
+	 * already in the database.  If skipping records, create empty ones.
+	 */
+	if (nrec > t->bt_nrecs) {
+		if (!F_ISSET(t, R_EOF | R_INMEM) &&
+		    t->bt_irec(t, nrec) == RET_ERROR)
+			return (RET_ERROR);
+		if (nrec > t->bt_nrecs + 1) {
+			if (F_ISSET(t, R_FIXLEN)) {
+				if ((tdata.data =
+				    (void *)malloc(t->bt_reclen)) == NULL)
+					return (RET_ERROR);
+				tdata.size = t->bt_reclen;
+				memset(tdata.data, t->bt_bval, tdata.size);
+			} else {
+				tdata.data = NULL;
+				tdata.size = 0;
+			}
+			while (nrec > t->bt_nrecs + 1)
+				if (__rec_iput(t,
+				    t->bt_nrecs, &tdata, 0) != RET_SUCCESS)
+					return (RET_ERROR);
+			if (F_ISSET(t, R_FIXLEN))
+				free(tdata.data);
+		}
+	}
+
+	if ((status = __rec_iput(t, nrec - 1, &fdata, flags)) != RET_SUCCESS)
+		return (status);
+
+	if (flags == R_SETCURSOR)
+		t->bt_cursor.rcursor = nrec;
+	
+	F_SET(t, R_MODIFIED);
+	return (__rec_ret(t, NULL, nrec, key, NULL));
+}
+
+/*
+ * __REC_IPUT -- Add a recno item to the tree.
+ *
+ * Parameters:
+ *	t:	tree
+ *	nrec:	record number
+ *	data:	data
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_iput(t, nrec, data, flags)
+	BTREE *t;
+	recno_t nrec;
+	const DBT *data;
+	u_int flags;
+{
+	DBT tdata;
+	EPG *e;
+	PAGE *h;
+	indx_t idx, nxtindex;
+	db_pgno_t pg;
+	u_int32_t nbytes;
+	int dflags, status;
+	char *dest, db[NOVFLSIZE];
+
+	/*
+	 * If the data won't fit on a page, store it on indirect pages.
+	 *
+	 * XXX
+	 * If the insert fails later on, these pages aren't recovered.
+	 */
+	if (data->size > t->bt_ovflsize) {
+		if (__ovfl_put(t, data, &pg) == RET_ERROR)
+			return (RET_ERROR);
+		tdata.data = db;
+		tdata.size = NOVFLSIZE;
+		*(db_pgno_t *)db = pg;
+		*(u_int32_t *)(db + sizeof(db_pgno_t)) = data->size;
+		dflags = P_BIGDATA;
+		data = &tdata;
+	} else
+		dflags = 0;
+
+	/* __rec_search pins the returned page. */
+	if ((e = __rec_search(t, nrec,
+	    nrec > t->bt_nrecs || flags == R_IAFTER || flags == R_IBEFORE ?
+	    SINSERT : SEARCH)) == NULL)
+		return (RET_ERROR);
+
+	h = e->page;
+	idx = e->index;
+
+	/*
+	 * Add the specified key/data pair to the tree.  The R_IAFTER and
+	 * R_IBEFORE flags insert the key after/before the specified key.
+	 *
+	 * Pages are split as required.
+	 */
+	switch (flags) {
+	case R_IAFTER:
+		++idx;
+		break;
+	case R_IBEFORE:
+		break;
+	default:
+		if (nrec < t->bt_nrecs &&
+		    __rec_dleaf(t, h, idx) == RET_ERROR) {
+			mpool_put(t->bt_mp, h, 0);
+			return (RET_ERROR);
+		}
+		break;
+	}
+
+	/*
+	 * If not enough room, split the page.  The split code will insert
+	 * the key and data and unpin the current page.  If inserting into
+	 * the offset array, shift the pointers up.
+	 */
+	nbytes = NRLEAFDBT(data->size);
+	if (h->upper - h->lower < nbytes + sizeof(indx_t)) {
+		status = __bt_split(t, h, NULL, data, dflags, nbytes, idx);
+		if (status == RET_SUCCESS)
+			++t->bt_nrecs;
+		return (status);
+	}
+
+	if (idx < (nxtindex = NEXTINDEX(h)))
+		memmove(h->linp + idx + 1, h->linp + idx,
+		    (nxtindex - idx) * sizeof(indx_t));
+	h->lower += sizeof(indx_t);
+
+	h->linp[idx] = h->upper -= nbytes;
+	dest = (char *)h + h->upper;
+	WR_RLEAF(dest, data, dflags);
+
+	++t->bt_nrecs;
+	F_SET(t, B_MODIFIED);
+	mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_search.c b/src/plugins/kdb/db2/libdb2/recno/rec_search.c
new file mode 100644
index 0000000000..a328f1be06
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_search.c
@@ -0,0 +1,126 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_search.c	8.4 (Berkeley) 7/14/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+/*
+ * __REC_SEARCH -- Search a btree for a key.
+ *
+ * Parameters:
+ *	t:	tree to search
+ *	recno:	key to find
+ *	op: 	search operation
+ *
+ * Returns:
+ *	EPG for matching record, if any, or the EPG for the location of the
+ *	key, if it were inserted into the tree.
+ *
+ * Returns:
+ *	The EPG for matching record, if any, or the EPG for the location
+ *	of the key, if it were inserted into the tree, is entered into
+ *	the bt_cur field of the tree.  A pointer to the field is returned.
+ */
+EPG *
+__rec_search(t, recno, op)
+	BTREE *t;
+	recno_t recno;
+	enum SRCHOP op;
+{
+	register indx_t idx;
+	register PAGE *h;
+	EPGNO *parent;
+	RINTERNAL *r;
+	db_pgno_t pg;
+	indx_t top;
+	recno_t total;
+	int sverrno;
+
+	BT_CLR(t);
+	for (pg = P_ROOT, total = 0;;) {
+		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+			goto err;
+		if (h->flags & P_RLEAF) {
+			t->bt_cur.page = h;
+			t->bt_cur.index = recno - total;
+			return (&t->bt_cur);
+		}
+		for (idx = 0, top = NEXTINDEX(h);;) {
+			r = GETRINTERNAL(h, idx);
+			if (++idx == top || total + r->nrecs > recno)
+				break;
+			total += r->nrecs;
+		}
+
+		BT_PUSH(t, pg, idx - 1);
+		
+		pg = r->pgno;
+		switch (op) {
+		case SDELETE:
+			--GETRINTERNAL(h, (idx - 1))->nrecs;
+			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+			break;
+		case SINSERT:
+			++GETRINTERNAL(h, (idx - 1))->nrecs;
+			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+			break;
+		case SEARCH:
+			mpool_put(t->bt_mp, h, 0);
+			break;
+		}
+
+	}
+	/* Try and recover the tree. */
+err:	sverrno = errno;
+	if (op != SEARCH)
+		while  ((parent = BT_POP(t)) != NULL) {
+			if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+				break;
+			if (op == SINSERT)
+				--GETRINTERNAL(h, parent->index)->nrecs;
+			else
+				++GETRINTERNAL(h, parent->index)->nrecs;
+                        mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+                }
+	errno = sverrno;
+	return (NULL);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_seq.c b/src/plugins/kdb/db2/libdb2/recno/rec_seq.c
new file mode 100644
index 0000000000..1edaa998e8
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_seq.c
@@ -0,0 +1,131 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_seq.c	8.3 (Berkeley) 7/14/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+/*
+ * __REC_SEQ -- Recno sequential scan interface.
+ *
+ * Parameters:
+ *	dbp:	pointer to access method
+ *	key:	key for positioning and return value
+ *	data:	data return value
+ *	flags:	R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV.
+ *
+ * Returns:
+ *	RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+int
+__rec_seq(dbp, key, data, flags)
+	const DB *dbp;
+	DBT *key, *data;
+	u_int flags;
+{
+	BTREE *t;
+	EPG *e;
+	recno_t nrec;
+	int status;
+
+	t = dbp->internal;
+
+	/* Toss any page pinned across calls. */
+	if (t->bt_pinned != NULL) {
+		mpool_put(t->bt_mp, t->bt_pinned, 0);
+		t->bt_pinned = NULL;
+	}
+
+	switch(flags) {
+	case R_CURSOR:
+		if ((nrec = *(recno_t *)key->data) == 0)
+			goto einval;
+		break;
+	case R_NEXT:
+		if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
+			nrec = t->bt_cursor.rcursor + 1;
+			break;
+		}
+		/* FALLTHROUGH */
+	case R_FIRST:
+		nrec = 1;
+		break;
+	case R_PREV:
+		if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
+			if ((nrec = t->bt_cursor.rcursor - 1) == 0)
+				return (RET_SPECIAL);
+			break;
+		}
+		/* FALLTHROUGH */
+	case R_LAST:
+		if (!F_ISSET(t, R_EOF | R_INMEM) &&
+		    t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
+			return (RET_ERROR);
+		nrec = t->bt_nrecs;
+		break;
+	default:
+einval:		errno = EINVAL;
+		return (RET_ERROR);
+	}
+	
+	if (t->bt_nrecs == 0 || nrec > t->bt_nrecs) {
+		if (!F_ISSET(t, R_EOF | R_INMEM) &&
+		    (status = t->bt_irec(t, nrec)) != RET_SUCCESS)
+			return (status);
+		if (t->bt_nrecs == 0 || nrec > t->bt_nrecs)
+			return (RET_SPECIAL);
+	}
+
+	if ((e = __rec_search(t, nrec - 1, SEARCH)) == NULL)
+		return (RET_ERROR);
+
+	F_SET(&t->bt_cursor, CURS_INIT);
+	t->bt_cursor.rcursor = nrec;
+
+	status = __rec_ret(t, e, nrec, key, data);
+	if (F_ISSET(t, B_DB_LOCK))
+		mpool_put(t->bt_mp, e->page, 0);
+	else
+		t->bt_pinned = e->page;
+	return (status);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/rec_utils.c b/src/plugins/kdb/db2/libdb2/recno/rec_utils.c
new file mode 100644
index 0000000000..f757a724f5
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/rec_utils.c
@@ -0,0 +1,122 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_utils.c	8.6 (Berkeley) 7/16/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "db-int.h"
+#include "recno.h"
+
+/*
+ * __rec_ret --
+ *	Build return data.
+ *
+ * Parameters:
+ *	t:	tree
+ *	e:	key/data pair to be returned
+ *   nrec:	record number
+ *    key:	user's key structure
+ *	data:	user's data structure
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_ret(t, e, nrec, key, data)
+	BTREE *t;
+	EPG *e;
+	recno_t nrec;
+	DBT *key, *data;
+{
+	RLEAF *rl;
+	void *p;
+
+	if (key == NULL)
+		goto dataonly;
+
+	/* We have to copy the key, it's not on the page. */
+	if (sizeof(recno_t) > t->bt_rkey.size) {
+		p = (void *)(t->bt_rkey.data == NULL ?
+		    malloc(sizeof(recno_t)) :
+		    realloc(t->bt_rkey.data, sizeof(recno_t)));
+		if (p == NULL)
+			return (RET_ERROR);
+		t->bt_rkey.data = p;
+		t->bt_rkey.size = sizeof(recno_t);
+	}
+	memmove(t->bt_rkey.data, &nrec, sizeof(recno_t));
+	key->size = sizeof(recno_t);
+	key->data = t->bt_rkey.data;
+
+dataonly:
+	if (data == NULL)
+		return (RET_SUCCESS);
+
+	/*
+	 * We must copy big keys/data to make them contigous.  Otherwise,
+	 * leave the page pinned and don't copy unless the user specified
+	 * concurrent access.
+	 */
+	rl = GETRLEAF(e->page, e->index);
+	if (rl->flags & P_BIGDATA) {
+		if (__ovfl_get(t, rl->bytes,
+		    &data->size, &t->bt_rdata.data, &t->bt_rdata.size))
+			return (RET_ERROR);
+		data->data = t->bt_rdata.data;
+	} else if (F_ISSET(t, B_DB_LOCK)) {
+		/* Use +1 in case the first record retrieved is 0 length. */
+		if (rl->dsize + 1 > t->bt_rdata.size) {
+			p = (void *)(t->bt_rdata.data == NULL ?
+			    malloc(rl->dsize + 1) :
+			    realloc(t->bt_rdata.data, rl->dsize + 1));
+			if (p == NULL)
+				return (RET_ERROR);
+			t->bt_rdata.data = p;
+			t->bt_rdata.size = rl->dsize + 1;
+		}
+		memmove(t->bt_rdata.data, rl->bytes, rl->dsize);
+		data->size = rl->dsize;
+		data->data = t->bt_rdata.data;
+	} else {
+		data->size = rl->dsize;
+		data->data = rl->bytes;
+	}
+	return (RET_SUCCESS);
+}
diff --git a/src/plugins/kdb/db2/libdb2/recno/recno.h b/src/plugins/kdb/db2/libdb2/recno/recno.h
new file mode 100644
index 0000000000..bec772c2fa
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/recno/recno.h
@@ -0,0 +1,39 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)recno.h	8.1 (Berkeley) 6/4/93
+ */
+
+enum SRCHOP { SDELETE, SINSERT, SEARCH};	/* Rec_search operation. */
+
+#include "../btree/btree.h"
+#include "extern.h"
diff --git a/src/plugins/kdb/db2/libdb2/test/ChangeLog b/src/plugins/kdb/db2/libdb2/test/ChangeLog
new file mode 100644
index 0000000000..91d5c1f6df
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/ChangeLog
@@ -0,0 +1,85 @@
+2005-12-16  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (PROG_LIBPATH, DB_DEPLIB): Look for library in
+	.. instead of $TOPLIBD.
+	(myfulldir): Updated for directory rename.
+
+2005-10-04  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in (BUILDTOP, myfulldir): Updated for directory move.
+	(DB_LIB, DB_DEPLIB): Define here now.
+
+2004-08-27  Ken Raeburn  <raeburn@mit.edu>
+
+	* run.test (getnwords): Run data through "cat -v", because at
+	least one version of Debian Linux has an English dictionary with
+	Latin-1 characters and a "rev" that seems to default to some sort
+	of Unicode.
+
+2004-08-15  Ken Raeburn  <raeburn@mit.edu>
+
+	* run.test (getnwords): Rewrite to drop blank lines before
+	counting lines, not after.
+
+2004-08-12  Ken Raeburn  <raeburn@mit.edu>
+
+	* run.test (getnwords): New function.  Uses sed to get N words
+	from $DICT as other functions did before, but discards blank
+	lines.
+	(test1, test2, test12, test13, test20): Call getnwords.
+
+2003-01-05  Sam Hartman  <hartmans@mit.edu>
+
+	* SEQ_TEST/t.c (main): Remove declaration of errno
+
+2002-08-29  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile.in: Revert $(S)=>/ change, for Windows support.
+
+2002-08-23  Ken Raeburn  <raeburn@mit.edu>
+
+	* Makefile: Deleted.
+
+	* Makefile.in: Change $(S)=>/ and $(U)=>.. globally.
+
+2002-08-23  Tom Yu  <tlyu@mit.edu>
+
+	* dbtest.c: Include btree.h if we're compiled with -DSTATISTICS.
+
+	* Makefile.in: Add rules for bttest; also add a clean rule.
+
+2002-05-08  Ken Raeburn  <raeburn@mit.edu>
+	
+	* dbtest.c: Test for __STDC__ defined, not nonzero, to decide
+	whether to use stdarg.h or varargs.h.
+	(err): Similarly for function signature.
+
+2002-02-19  Ken Raeburn  <raeburn@mit.edu>
+
+	* run.test: Use "/bin/." instead of "/bin" in find commands in
+	case /bin itself is a symlink.
+	(test8): Check exit status of dbtest program.
+
+	* dbtest.c (compare): Exit with error indication if comparison of
+	contents indicates a difference.
+	(get): Exit with error indication after printing message if key
+	not found.
+
+2002-01-04  Ken Raeburn  <raeburn@mit.edu>
+
+	* run.test (test8): If test reports an error, exit with error
+	indication.
+
+	* dbtest.c (compare): Exit with error indication if size
+	comparison fails.
+
+2000-06-26  Ken Raeburn  <raeburn@mit.edu>
+
+	* dbtest.c (err): Add format attribute to decl, for typechecking
+	under GNU C.
+
+1998-05-06  Theodore Ts'o  <tytso@rsts-11.mit.edu>
+
+	* dbtest.c (main): POSIX states that getopt returns -1
+		when it is done parsing options, not EOF.
+
diff --git a/src/plugins/kdb/db2/libdb2/test/Makefile.in b/src/plugins/kdb/db2/libdb2/test/Makefile.in
new file mode 100644
index 0000000000..af4b6bec72
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/Makefile.in
@@ -0,0 +1,36 @@
+thisconfigdir=./..
+myfulldir=plugins/kdb/db2/libdb2/test
+mydir=test
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..$(S)..
+
+FCTSH = @FCTSH@
+TMPDIR=.
+
+LOCALINCLUDES=	-I. -I$(srcdir)/../include -I../include -I$(srcdir)/../mpool \
+		-I$(srcdir)/../btree -I$(srcdir)/../hash -I$(srcdir)/../db
+
+PROG_LIBPATH=-L..
+PROG_RPATH=$(KRB5_LIBDIR)
+
+KRB5_RUN_ENV= @KRB5_RUN_ENV@
+
+DB_LIB		= -ldb
+DB_DEPLIB	= ../libdb$(DEPLIBEXT)
+
+all::
+
+dbtest: dbtest.o $(DB_DEPLIB)
+	$(CC_LINK) -o $@ dbtest.o $(STRERROR_OBJ) $(DB_LIB)
+
+check:: dbtest
+	$(KRB5_RUN_ENV) srcdir=$(srcdir) TMPDIR=$(TMPDIR) $(FCTSH) $(srcdir)/run.test
+
+bttest.o: $(srcdir)/btree.tests/main.c
+	$(CC) $(ALL_CFLAGS) -c $(srcdir)/btree.tests/main.c -o $@
+
+bttest: bttest.o $(DB_DEPLIB)
+	$(CC_LINK) -o $@ bttest.o $(STRERROR_OBJ) $(DB_LIB)
+
+clean-unix::
+	$(RM) dbtest.o dbtest __dbtest
+	$(RM) bttest.o bttest
diff --git a/src/plugins/kdb/db2/libdb2/test/README b/src/plugins/kdb/db2/libdb2/test/README
new file mode 100644
index 0000000000..0c0cd13d8f
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/README
@@ -0,0 +1,74 @@
+#	@(#)README	8.8 (Berkeley) 7/31/94
+
+To build this portably, try something like:
+
+    make PORTDIR="../PORT/MACH"
+
+where MACH is the machine, i.e. "sunos.4.1.1".
+
+To run the tests, enter "sh run.test".  If your system dictionary isn't
+in /usr/share/dict/words, edit run.test to reflect the correct place.
+
+Fairly large files (the command files) are built in this directory during
+the test runs, and even larger files (the database files) are created in
+"/var/tmp".  If the latter directory doesn't exist, set the environmental
+variable TMPDIR to a directory where the files can be built.
+
+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+The script file consists of lines with an initial character which is
+the command for that line, or an initial character indicating a key
+or data entry for a previous command.
+
+Legal command characters are as follows:
+
+c: compare a record
+	+ must be followed by [kK][dD]; the data value in the database
+	  associated with the specified key is compared to the specified
+	  data value.
+e: echo a string
+	+ writes out the rest of the line into the output file; if the
+	  last character is not a carriage-return, a newline is appended.
+f: set the flags for the next command
+	+ no value zero's the flags
+g: do a get command
+	+ must be followed by [kK]
+	+ writes out the retrieved data DBT.
+o [r]: dump [reverse]
+	+ dump the database out, if 'r' is set, in reverse order.
+p: do a put command
+	+ must be followed by [kK][dD]
+r: do a del command
+	+ must be followed by [kK] unless R_CURSOR flag set.
+S: sync the database
+s: do a seq command
+	+ must be followed by [kK] if R_CURSOR flag set.
+	+ writes out the retrieved data DBT.
+
+Legal key/data characters are as follows:
+
+D [file]: data file
+	+ set the current data value to the contents of the file
+d [data]:
+	+ set the current key value to the contents of the line.
+K [file]: key file
+	+ set the current key value to the contents of the file
+k [data]:
+	+ set the current key value to the contents of the line.
+
+Blank lines, lines with leading white space, and lines with leading
+hash marks (#) are ignored.
+
+Options to dbtest are as follows:
+
+	-d: Set the DB_LOCK flag.
+	-f: Use the file argument as the database file.
+	-i: Use the rest of the argument to set elements in the info
+	    structure.  If the type is btree, then "-i cachesize=10240"
+	    will set BTREEINFO.cachesize to 10240.
+	-o: The rest of the argument is the output file instead of
+	    using stdout.
+	-s: Don't delete the database file before opening it, i.e.
+	    use the database file from a previous run.
+
+Dbtest requires two arguments, the type of access "hash", "recno"
+or "btree", and the script name or "-" to indicate stdin.
diff --git a/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/data b/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/data
new file mode 100644
index 0000000000..37a518537e
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/data
@@ -0,0 +1,8 @@
+A000027875A000135891
+A000059165A000130168
+A000060256A000133490
+A040025906A000136770
+A040027881A000135829
+A040028611A000137873
+A040032413A000056974
+A040050163A000126233
diff --git a/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/mbox b/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/mbox
new file mode 100644
index 0000000000..9d5d49d073
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/mbox
@@ -0,0 +1,399 @@
+From wiggans@aipl.arsusda.gov Mon Sep 12 11:05:58 1994
+Received: from vangogh.CS.Berkeley.EDU by python.bostic.com (8.6.9.Beta4/2.6)
+	id OAA16853; Mon, 12 Sep 1994 14:05:42 -0400
+From: wiggans@aipl.arsusda.gov
+Received: from hofmann.CS.Berkeley.EDU (hofmann.CS.Berkeley.EDU [128.32.34.35]) by vangogh.CS.Berkeley.EDU (8.7.Alpha.1/8.6.9.Beta0) with ESMTP id LAA15825 for <bostic@vangogh.CS.Berkeley.EDU>; Mon, 12 Sep 1994 11:05:20 -0700 (PDT)
+Received: from uu7.psi.com (uu7.psi.com [38.145.204.6]) by hofmann.CS.Berkeley.EDU (8.6.9/8.6.6.Beta11) with SMTP id LAA25681 for <bostic@cs.berkeley.edu>; Mon, 12 Sep 1994 11:05:44 -0700
+Received: from AIPL.ARSUSDA.GOV by uu7.psi.com (5.65b/4.0.071791-PSI/PSINet) via SMTP;
+        id AA00699 for bostic@cs.berkeley.edu; Mon, 12 Sep 94 14:06:15 -0400
+Received: by aipl.arsusda.gov (AIX 3.2/UCB 5.64/4.03)
+          id AA14802; Mon, 12 Sep 1994 14:05:48 -0400
+Message-Id: <9409121805.AA14802@aipl.arsusda.gov>
+Subject: db 1.85 problem
+To: bostic@cs.berkeley.edu (Keith Bostic)
+Date: Mon, 12 Sep 1994 14:05:47 -0400 (EDT)
+X-Mailer: ELM [version 2.4 PL22]
+Content-Type: text
+Content-Length: 2553      
+Status: RO
+
+In using the btree option to sequentially read and then write a file, we
+are having a problem with 1.85.  When compiled with 1.73 there is no
+problem.  The problem is that the seq call keeps reading the same record. 
+The code follows:
+
+/* chkseq.c  Check sequential read and write */
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>    /* O_CREAT,  O_RDWR */
+#include <errno.h>    /* Error numbers */
+#include <db.h>
+ 
+extern int errno;
+extern char *sys_errlist[];
+ 
+typedef struct idst {
+  char id1[7];
+} id;
+
+void cvtid(char *, char *);
+ 
+void main() {
+  char anim10[11], datastor[212],keystor[10], *pc;
+  int i;
+  long in = 0L;
+  DB *dbp, *dbpo;
+  DBT key, data, keyo, datao;
+
+  if ((dbp = dbopen("bullxrf.db", O_RDWR, 0664
+       , DB_BTREE, NULL )) == NULL) {
+    printf("\n Error on dbopen %d %s\n",errno,strerror(errno));
+    exit(61);
+  }
+  key.size = 7;
+  keyo.size = 7;
+
+  while (dbp->seq(dbp, &key, &data,R_NEXT) == 0) {
+    in++;
+     if (in > 20) break; 
+/*      pc = (char *) key.data; 
+for (i=0;i<key.size;i++) printf("%02x",pc[i]); printf("\n"); */
+      cvtid(anim10,key.data); printf("%s\n",anim10); 
+    memcpy(keystor,key.data,key.size);
+/* for (i=0;i<key.size;i++) printf("%02x",keystor[i]); printf("\n"); */
+    memcpy(datastor,data.data,data.size);
+/* for (i=0;i<8;i++) printf("%02x",datastor[i]); printf("\n"); */
+    keyo.data = keystor;
+    datao.data = datastor;
+    datao.size = data.size;
+/*
+    if (in % 1000 == 1) {
+        cvtid(anim10,key.data); printf("%5d %s\n",in,anim10);  */
+      if (dbp->put(dbp, &keyo, &datao,0) != 0) {
+        printf("Write failed at %d\n",in);
+        exit(85);
+      }
+/*  }
+ */
+  }  
+  printf("%d Records copied\n",in);
+  dbp->close(dbp);
+}
+
+I am running on an RS/6000 AIX 3.2.5.  The section of the make file
+follows:
+
+# Make file
+all: chkseq
+
+chkseq: chkseq.c 
+	cc -gO3 -lm -o chkseq\
+  -L /data6/hash/include/sys/lib -l db  -I /data6/hash/include \
+  chkseq.c cvtid.o ascii.o
+#  -L /data12/db.1.85 -l db  -I /data12/db.1.85/include \
+
+We would appreciate your help.
+Thanks,
+
+-- 
+George Wiggans           I================================================I
+                         |Animal Improvement Programs Laboratory          |
+Phone:   301-504-8407    |Bldg 263 Beltsville Agricultural Research Center|
+FAX:     301-504-8092    |Beltsville, MD 20705-2350  USA                  |
+wiggans@aipl.arsusda.gov |                                                |
+=========================I================================================I
+
+From wiggans@aipl.arsusda.gov Fri Sep 16 20:27:22 1994
+Received: from vangogh.CS.Berkeley.EDU by python.bostic.com (8.6.9.Beta4/2.6)
+	id XAA09260; Fri, 16 Sep 1994 23:27:09 -0400
+From: wiggans@aipl.arsusda.gov
+Received: from hofmann.CS.Berkeley.EDU (hofmann.CS.Berkeley.EDU [128.32.34.35]) by vangogh.CS.Berkeley.EDU (8.7.Alpha.1/8.6.9.Beta0) with ESMTP id UAA25674 for <bostic@vangogh.CS.Berkeley.EDU>; Fri, 16 Sep 1994 20:27:03 -0700 (PDT)
+Received: from uu7.psi.com (uu7.psi.com [38.145.204.6]) by hofmann.CS.Berkeley.EDU (8.6.9/8.6.6.Beta11) with SMTP id UAA15043 for <bostic@cs.berkeley.edu>; Fri, 16 Sep 1994 20:27:16 -0700
+Received: from AIPL.ARSUSDA.GOV by uu7.psi.com (5.65b/4.0.071791-PSI/PSINet) via SMTP;
+        id AA18737 for bostic@cs.berkeley.edu; Fri, 16 Sep 94 23:27:14 -0400
+Received: by aipl.arsusda.gov (AIX 3.2/UCB 5.64/4.03)
+          id AA10907; Fri, 16 Sep 1994 23:26:18 -0400
+Message-Id: <9409170326.AA10907@aipl.arsusda.gov>
+Subject: Test case
+To: bostic@cs.berkeley.edu (Keith Bostic)
+Date: Fri, 16 Sep 1994 23:26:16 -0400 (EDT)
+X-Mailer: ELM [version 2.4 PL22]
+Content-Type: text
+Content-Length: 3713      
+Status: RO
+
+The following program loads 2 10 character animal ID which are used to
+change an animal's ID.  After loading, it closes, then opens and
+sequentially reads and rewrites the file changing the first character of
+the 2nd ID to U.  Failure is observed when the update part gets stuck on
+the first record, rereading it.  The last step displays the updated file.
+The name of the data file is a command line argument.
+
+The data:
+A000027875A000135891
+A000059165A000130168
+A000060256A000133490
+A040025906A000136770
+A040027881A000135829
+A040028611A000137873
+A040032413A000056974
+A040050163A000126233
+A040050329A000126177
+A040050411A000119017
+A040050995A000116767
+A040051022A000126669
+A040051276A000127444
+A040051514A000120563
+A040051597A000127287
+A040051627A000127284
+A040051700A000126914
+A040051810A000127286
+A040051964A000118834
+A040052164A000135104
+A040052165A000127688
+A040052186A000126926
+A040052530A000126287
+A040052560A000119160
+A040052892A000125334
+A040053004A000127684
+A040053359A000128628
+A040053378A000137680
+A040053416A000128825
+A040053589A000120369
+A040053620A000128460
+A040053751A000123525
+A040053754A000126736
+A040054191A000126286
+A040054251A000121745
+A040054253A000127848
+A040054596A000130931
+A040054981A000128731
+A040055000A000127689
+
+The program:
+/* chkseq.c  Check sequential read and write */
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>    /* O_CREAT,  O_RDWR */
+#include <errno.h>    /* Error numbers */
+#include <db.h>
+ 
+extern int errno;
+extern char *sys_errlist[];
+ 
+ 
+void main(int argc, char *argv[]) {
+  char id1[] = {"          "}, id2[] = {"          "};
+  int i;
+  long in = 0L, out = 0L;
+  DB *dbp, *dbpo;
+  DBT key, data, keyo, datao;
+  FILE *fopen(), *fin;
+
+  if ((fin = fopen(argv[1],"r")) == NULL) {
+    printf("Unable to open %s\n",argv[1]);
+    exit(25);
+  }
+  if ((dbp = dbopen("test.db",O_RDWR | O_CREAT, 0664
+       , DB_BTREE, NULL )) == NULL) {
+    printf("\n Open error on test.db %d %s\n",errno,strerror(errno));
+    exit(25);
+  }
+   
+  while (fscanf(fin," %10s%10s",id1,id2) > 0) {
+    key.size = 11;
+    data.size = 11;
+    key.data = id1;
+    data.data = id2;
+    printf("%10s %10s\n",key.data,data.data); 
+    if (dbp->put(dbp, &key, &data,R_NOOVERWRITE) != 0) {
+      printf("Error writing output\n");
+    }
+    out++;
+  }
+  printf("%d Records in\n",out);
+  dbp->close(dbp);
+  
+  if ((dbp = dbopen("test.db", O_RDWR, 0664
+       , DB_BTREE, NULL )) == NULL) {
+    printf("\n Error on dbopen %d %s\n",errno,strerror(errno));
+    exit(61);
+  }
+
+  while (dbp->seq(dbp, &key, &data,R_NEXT) == 0) {
+    strcpy(id1,key.data);
+    keyo.size = 11;
+    datao.size = 11;
+    keyo.data = id1;
+    strcpy(id2,data.data);
+    id2[0] = 'U';
+    datao.data=id2;
+    printf("%10s %10s\n",key.data,data.data); 
+    in++;
+    if (in > 50) break;
+    if (dbp->put(dbp, &keyo, &datao,0) != 0) {
+        printf("Write failed at %d\n",in);
+        exit(85);
+    }
+  }
+  printf("%d Records copied\n",in);
+  in = 0;
+    dbp->seq(dbp, &key, &data,R_FIRST);
+    printf("%10s %10s\n",key.data,data.data); 
+    in++;
+  while (dbp->seq(dbp, &key, &data,R_NEXT) == 0) {
+    in++;
+    printf("%10s %10s\n",key.data,data.data); 
+  }
+  printf("%d Records read\n",in);
+  dbp->close(dbp);
+}
+
+
+-- 
+George Wiggans           I================================================I
+                         |Animal Improvement Programs Laboratory          |
+Phone:   301-504-8407    |Bldg 263 Beltsville Agricultural Research Center|
+FAX:     301-504-8092    |Beltsville, MD 20705-2350  USA                  |
+wiggans@aipl.arsusda.gov |                                                |
+=========================I================================================I
+
+From bostic Fri Sep 23 08:44:56 1994
+To: wiggans@aipl.arsusda.gov /usr/src/local/db/test/SEQ_TEST/mbox
+Subject: Re: Test case
+
+
+OK, I've attached a tentative patch for the bug, that appears
+to fix it on my local system.  Please let me know if you have
+any further problems with this.
+
+There are a couple of issues here.  The first, is that to some
+extent, the btree code is correct.  You aren't replacing the
+cursor in your test program, you're adding a new key, which
+just happens to be where the cursor was.  So, the btree code
+is doing you a favor by returning the new key as part of the
+cursor walk, and it's not its fault.  ;-}
+
+However, because a put to the cursor record is done using a
+delete/add pair, doing it the "right" way will result in the
+exact same behavior as you saw doing it "wrong".
+
+Thinking about this further, there's another bug that's going to
+hit eventually -- if you have duplicate records, the current
+scheme of doing delete/add to replace the cursor record can result
+in a record being returned twice, which is tacky at best, if not
+actually wrong.
+
+I think I may have to revisit how duplicate records are stored.
+Which does not make me happy. ;-{
+
+--keith
+
+*** db/btree/bt_seq.c.orig	Fri Sep 23 08:35:06 1994
+--- db/btree/bt_seq.c	Fri Sep 23 08:34:58 1994
+***************
+*** 35,41 ****
+   */
+  
+  #if defined(LIBC_SCCS) && !defined(lint)
+! static char sccsid[] = "@(#)bt_seq.c	8.7 (Berkeley) 7/20/94";
+  #endif /* LIBC_SCCS and not lint */
+  
+  #include <sys/types.h>
+--- 35,41 ----
+   */
+  
+  #if defined(LIBC_SCCS) && !defined(lint)
+! static char sccsid[] = "@(#)bt_seq.c	8.8 (Berkeley) 9/23/94";
+  #endif /* LIBC_SCCS and not lint */
+  
+  #include <sys/types.h>
+***************
+*** 246,252 ****
+  	PAGE *h;
+  	indx_t index;
+  	pgno_t pg;
+! 	int exact;
+  
+  	/*
+  	 * There are a couple of states that we can be in.  The cursor has
+--- 246,252 ----
+  	PAGE *h;
+  	indx_t index;
+  	pgno_t pg;
+! 	int exact, rval;
+  
+  	/*
+  	 * There are a couple of states that we can be in.  The cursor has
+***************
+*** 255,269 ****
+  	c = &t->bt_cursor;
+  
+  	/*
+! 	 * The cursor was deleted where there weren't any duplicate records,
+! 	 * so the key was saved.  Find out where that key would go in the
+! 	 * current tree.  It doesn't matter if the returned key is an exact
+! 	 * match or not -- if it's an exact match, the record was added after
+! 	 * the delete so we can just return it.  If not, as long as there's
+! 	 * a record there, return it.
+  	 */
+! 	if (F_ISSET(c, CURS_ACQUIRE))
+! 		return (__bt_first(t, &c->key, ep, &exact));
+  
+  	/* Get the page referenced by the cursor. */
+  	if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+--- 255,299 ----
+  	c = &t->bt_cursor;
+  
+  	/*
+! 	 * The cursor was deleted and there weren't any duplicate records,
+! 	 * so the cursor's key was saved.  Find out where that key would
+! 	 * be in the current tree.  If the returned key is an exact match,
+! 	 * it means that a key/data pair was inserted into the tree after
+! 	 * the delete.  We could reasonably return the key, but the problem
+! 	 * is that this is the access pattern we'll see if the user is
+! 	 * doing seq(..., R_NEXT)/put(..., 0) pairs, i.e. the put deletes
+! 	 * the cursor record and then replaces it, so the cursor was saved,
+! 	 * and we'll simply return the same "new" record until the user
+! 	 * notices and doesn't do a put() of it.  Since the key is an exact
+! 	 * match, we could as easily put the new record before the cursor,
+! 	 * and we've made no guarantee to return it.  So, move forward or
+! 	 * back a record if it's an exact match.
+! 	 *
+! 	 * XXX
+! 	 * In the current implementation, put's to the cursor are done with
+! 	 * delete/add pairs.  This has two consequences.  First, it means
+! 	 * that seq(..., R_NEXT)/put(..., R_CURSOR) pairs are going to exhibit
+! 	 * the same behavior as above.  Second, you can return the same key
+! 	 * twice if you have duplicate records.  The scenario is that the
+! 	 * cursor record is deleted, moving the cursor forward or backward
+! 	 * to a duplicate.  The add then inserts the new record at a location
+! 	 * ahead of the cursor because duplicates aren't sorted in any way,
+! 	 * and the new record is later returned.  This has to be fixed at some
+! 	 * point.
+  	 */
+! 	if (F_ISSET(c, CURS_ACQUIRE)) {
+! 		if (rval = __bt_first(t, &c->key, ep, &exact))
+! 			return (RET_ERROR);
+! 		if (!exact)
+! 			return (rval);
+! 		/*
+! 		 * XXX
+! 		 * Kluge -- get, release, get the page.
+! 		 */
+! 		c->pg.pgno = ep->page->pgno;
+! 		c->pg.index = ep->index;
+! 		mpool_put(t->bt_mp, ep->page, 0);
+! 	}
+  
+  	/* Get the page referenced by the cursor. */
+  	if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+
+
+
diff --git a/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/t.c b/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/t.c
new file mode 100644
index 0000000000..f77b676f14
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/SEQ_TEST/t.c
@@ -0,0 +1,85 @@
+/* chkseq.c  Check sequential read and write */
+
+#include <sys/stat.h>
+#include "db-int.h"
+#include <errno.h>    /* Error numbers */
+#include <fcntl.h>    /* O_CREAT,  O_RDWR */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+ 
+void main(int argc, char *argv[]) {
+  char id1[] = {"          "}, id2[] = {"          "};
+  int i;
+  long in = 0L, out = 0L;
+  DB *dbp, *dbpo;
+  DBT key, data, keyo, datao;
+  FILE *fopen(), *fin;
+
+  unlink("test.db");
+  if ((fin = fopen("data","r")) == NULL) {
+    printf("Unable to open %s\n","data");
+    exit(25);
+  }
+  if ((dbp = dbopen("test.db",O_RDWR | O_CREAT | O_BINARY, 0664
+       , DB_BTREE, NULL )) == NULL) {
+    printf("\n Open error on test.db %d %s\n",errno,strerror(errno));
+    exit(25);
+  }
+   
+  while (fscanf(fin," %10s%10s",id1,id2) > 0) {
+    key.size = 11;
+    data.size = 11;
+    key.data = id1;
+    data.data = id2;
+    printf("%10s %10s\n",key.data,data.data); 
+    if (dbp->put(dbp, &key, &data,R_NOOVERWRITE) != 0) {
+      printf("Error writing output\n");
+    }
+    out++;
+  }
+  printf("%d Records in\n",out);
+  dbp->close(dbp);
+  
+  if ((dbp = dbopen("test.db", O_RDWR | O_BINARY, 0664
+       , DB_BTREE, NULL )) == NULL) {
+    printf("\n Error on dbopen %d %s\n",errno,strerror(errno));
+    exit(61);
+  }
+
+  while (dbp->seq(dbp, &key, &data,R_NEXT) == 0) {
+    strcpy(id1,key.data);
+    keyo.size = 11;
+    datao.size = 11;
+    keyo.data = id1;
+    strcpy(id2,data.data);
+    id2[0] = 'U';
+    datao.data=id2;
+    printf("%10s %10s\n",key.data,data.data); 
+    in++;
+    if (in > 10) break;
+#ifdef notdef
+    if (dbp->put(dbp, &keyo, &datao,0) != 0) {
+        printf("Write failed at %d\n",in);
+        exit(85);
+    }
+#else
+    if (dbp->put(dbp, &keyo, &datao,R_CURSOR) != 0) {
+        printf("Write failed at %d\n",in);
+        exit(85);
+    }
+#endif
+  }
+  printf("%d Records copied\n",in);
+  in = 0;
+    dbp->seq(dbp, &key, &data,R_FIRST);
+    printf("%10s %10s\n",key.data,data.data); 
+    in++;
+  while (dbp->seq(dbp, &key, &data,R_NEXT) == 0) {
+    in++;
+    printf("%10s %10s\n",key.data,data.data); 
+  }
+  printf("%d Records read\n",in);
+  dbp->close(dbp);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/btree.tests/ChangeLog b/src/plugins/kdb/db2/libdb2/test/btree.tests/ChangeLog
new file mode 100644
index 0000000000..339db618af
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/btree.tests/ChangeLog
@@ -0,0 +1,17 @@
+2002-08-23  Tom Yu  <tlyu@mit.edu>
+
+	* main.c: Disable append(); we don't have R_APPEND in this release
+	of DB for some reason.  Disable load() due to lack of fgetline().
+	Conditionalize lots of things on -DSTATISTICS or -DDEBUG as
+	appropriate.
+	(rlist): New function; does recursive listing of principals.
+	(main): Fix up naming of *_ENDIAN macros.  Default to read-only
+	open, with new "-w" option for opening read/write.  Actually call
+	db->sync with the correct number of arguments.
+	(show): Update call to __bt_dpage().
+	(usage): Update.
+
+1998-05-06  Theodore Ts'o  <tytso@rsts-11.mit.edu>
+
+	* main.c (main): POSIX states that getopt returns -1
+		when it is done parsing options, not EOF.
diff --git a/src/plugins/kdb/db2/libdb2/test/btree.tests/main.c b/src/plugins/kdb/db2/libdb2/test/btree.tests/main.c
new file mode 100644
index 0000000000..06f02b3ad0
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/btree.tests/main.c
@@ -0,0 +1,832 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)main.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <fcntl.h>
+#include "db-int.h"
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include "btree.h"
+
+typedef struct cmd_table {
+	char *cmd;
+	int nargs;
+	int rconv;
+	void (*func) __P((DB *, char **));
+	char *usage, *descrip;
+} cmd_table;
+
+int stopstop;
+DB *globaldb;
+
+#if 0
+void append	__P((DB *, char **));
+#endif
+#ifdef STATISTICS
+void bstat	__P((DB *, char **));
+#endif
+void cursor	__P((DB *, char **));
+void delcur	__P((DB *, char **));
+void delete	__P((DB *, char **));
+#ifdef DEBUG
+void dump	__P((DB *, char **));
+#endif
+void first	__P((DB *, char **));
+void get	__P((DB *, char **));
+void help	__P((DB *, char **));
+void iafter	__P((DB *, char **));
+void ibefore	__P((DB *, char **));
+void icursor	__P((DB *, char **));
+void insert	__P((DB *, char **));
+void keydata	__P((DBT *, DBT *));
+void last	__P((DB *, char **));
+void list	__P((DB *, char **));
+#if 0
+void load	__P((DB *, char **));
+#endif
+#ifdef STATISTICS
+void mstat	__P((DB *, char **));
+#endif
+void next	__P((DB *, char **));
+int  parse	__P((char *, char **, int));
+void previous	__P((DB *, char **));
+#ifdef DEBUG
+void show	__P((DB *, char **));
+#endif
+void rlist	__P((DB *, char **));
+void usage	__P((void));
+void user	__P((DB *));
+
+cmd_table commands[] = {
+	"?",	0, 0, help, "help", NULL,
+#if 0
+	"a",	2, 1, append, "append key def", "append key with data def",
+#endif
+#ifdef STATISTICS
+	"b",	0, 0, bstat, "bstat", "stat btree",
+#endif
+	"c",	1, 1, cursor,  "cursor word", "move cursor to word",
+	"delc",	0, 0, delcur, "delcur", "delete key the cursor references",
+	"dele",	1, 1, delete, "delete word", "delete word",
+#ifdef DEBUG
+	"d",	0, 0, dump, "dump", "dump database",
+#endif
+	"f",	0, 0, first, "first", "move cursor to first record",
+	"g",	1, 1, get, "get key", "locate key",
+	"h",	0, 0, help, "help", "print command summary",
+	"ia",	2, 1, iafter, "iafter key data", "insert data after key",
+	"ib",	2, 1, ibefore, "ibefore key data", "insert data before key",
+	"ic",	2, 1, icursor, "icursor key data", "replace cursor",
+	"in",	2, 1, insert, "insert key def", "insert key with data def",
+	"la",	0, 0, last, "last", "move cursor to last record",
+	"li",	1, 1, list, "list file", "list to a file",
+#if 0
+	"loa",	1, 0, load, "load file", NULL,
+#endif
+	"loc",	1, 1, get, "get key", NULL,
+#ifdef STATISTICS
+	"m",	0, 0, mstat, "mstat", "stat memory pool",
+#endif
+	"n",	0, 0, next, "next", "move cursor forward one record",
+	"p",	0, 0, previous, "previous", "move cursor back one record",
+	"q",	0, 0, NULL, "quit", "quit",
+	"rli",	1, 1, rlist, "rlist file", "list to a file (recursive)",
+#ifdef DEBUG
+	"sh",	1, 0, show, "show page", "dump a page",
+#endif
+	{ NULL },
+};
+
+int recno;					/* use record numbers */
+char *dict = "words";				/* default dictionary */
+char *progname;
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	int c;
+	int omode;
+	DB *db;
+	BTREEINFO b;
+
+	progname = *argv;
+
+	omode = O_RDONLY;
+	b.flags = 0;
+	b.cachesize = 0;
+	b.maxkeypage = 0;
+	b.minkeypage = 0;
+	b.psize = 0;
+	b.compare = NULL;
+	b.prefix = NULL;
+	b.lorder = 0;
+
+	while ((c = getopt(argc, argv, "bc:di:lp:ruw")) != -1) {
+		switch (c) {
+		case 'b':
+			b.lorder = DB_BIG_ENDIAN;
+			break;
+		case 'c':
+			b.cachesize = atoi(optarg);
+			break;
+		case 'd':
+			b.flags |= R_DUP;
+			break;
+		case 'i':
+			dict = optarg;
+			break;
+		case 'l':
+			b.lorder = DB_LITTLE_ENDIAN;
+			break;
+		case 'p':
+			b.psize = atoi(optarg);
+			break;
+		case 'r':
+			recno = 1;
+			break;
+		case 'u':
+			b.flags = 0;
+			break;
+		case 'w':
+			omode = O_RDWR;
+			break;
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (recno)
+		db = dbopen(*argv == NULL ? NULL : *argv, omode|O_BINARY,
+		    0, DB_RECNO, NULL);
+	else
+		db = dbopen(*argv == NULL ? NULL : *argv, O_CREAT|omode|O_BINARY,
+		    0600, DB_BTREE, &b);
+
+	if (db == NULL) {
+		(void)fprintf(stderr, "dbopen: %s\n", strerror(errno));
+		exit(1);
+	}
+	globaldb = db;
+	user(db);
+	exit(0);
+	/* NOTREACHED */
+}
+
+void
+user(db)
+	DB *db;
+{
+	FILE *ifp;
+	int argc, i, last;
+	char *lbuf, *argv[4], buf[512];
+
+	if ((ifp = fopen("/dev/tty", "r")) == NULL) {
+		(void)fprintf(stderr,
+		    "/dev/tty: %s\n", strerror(errno));
+		exit(1);
+	}
+	for (last = 0;;) {
+		(void)printf("> ");
+		(void)fflush(stdout);
+		if ((lbuf = fgets(&buf[0], 512, ifp)) == NULL)
+			break;
+		if (lbuf[0] == '\n') {
+			i = last;
+			goto uselast;
+		}
+		lbuf[strlen(lbuf) - 1] = '\0';
+
+		if (lbuf[0] == 'q')
+			break;
+
+		argc = parse(lbuf, &argv[0], 3);
+		if (argc == 0)
+			continue;
+
+		for (i = 0; commands[i].cmd != NULL; i++)
+			if (strncmp(commands[i].cmd, argv[0],
+			    strlen(commands[i].cmd)) == 0)
+				break;
+
+		if (commands[i].cmd == NULL) {
+			(void)fprintf(stderr,
+			    "%s: command unknown ('help' for help)\n", lbuf);
+			continue;
+		}
+
+		if (commands[i].nargs != argc - 1) {
+			(void)fprintf(stderr, "usage: %s\n", commands[i].usage);
+			continue;
+		}
+
+		if (recno && commands[i].rconv) {
+			static recno_t nlong;
+			nlong = atoi(argv[1]);
+			argv[1] = (char *)&nlong;
+		}
+uselast:	last = i;
+		(*commands[i].func)(db, argv);
+	}
+	if ((db->sync)(db, 0) == RET_ERROR)
+		perror("dbsync");
+	else if ((db->close)(db) == RET_ERROR)
+		perror("dbclose");
+}
+
+int
+parse(lbuf, argv, maxargc)
+	char *lbuf, **argv;
+	int maxargc;
+{
+	int argc = 0;
+	char *c;
+
+	c = lbuf;
+	while (isspace(*c))
+		c++;
+	while (*c != '\0' && argc < maxargc) {
+		*argv++ = c;
+		argc++;
+		while (!isspace(*c) && *c != '\0') {
+			c++;
+		}
+		while (isspace(*c))
+			*c++ = '\0';
+	}
+	return (argc);
+}
+
+#if 0
+void
+append(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT key, data;
+	int status;
+
+	if (!recno) {
+		(void)fprintf(stderr,
+		    "append only available for recno db's.\n");
+		return;
+	}
+	key.data = argv[1];
+	key.size = sizeof(recno_t);
+	data.data = argv[2];
+	data.size = strlen(data.data);
+	status = (db->put)(db, &key, &data, R_APPEND);
+	switch (status) {
+	case RET_ERROR:
+		perror("append/put");
+		break;
+	case RET_SPECIAL:
+		(void)printf("%s (duplicate key)\n", argv[1]);
+		break;
+	case RET_SUCCESS:
+		break;
+	}
+}
+#endif
+
+void
+cursor(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	int status;
+
+	key.data = argv[1];
+	if (recno)
+		key.size = sizeof(recno_t);
+	else
+		key.size = strlen(argv[1]) + 1;
+	status = (*db->seq)(db, &key, &data, R_CURSOR);
+	switch (status) {
+	case RET_ERROR:
+		perror("cursor/seq");
+		break;
+	case RET_SPECIAL:
+		(void)printf("key not found\n");
+		break;
+	case RET_SUCCESS:
+		keydata(&key, &data);
+		break;
+	}
+}
+
+void
+delcur(db, argv)
+	DB *db;
+	char **argv;
+{
+	int status;
+
+	status = (*db->del)(db, NULL, R_CURSOR);
+
+	if (status == RET_ERROR)
+		perror("delcur/del");
+}
+
+void
+delete(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT key;
+	int status;
+
+	key.data = argv[1];
+	if (recno)
+		key.size = sizeof(recno_t);
+	else
+		key.size = strlen(argv[1]) + 1;
+
+	status = (*db->del)(db, &key, 0);
+	switch (status) {
+	case RET_ERROR:
+		perror("delete/del");
+		break;
+	case RET_SPECIAL:
+		(void)printf("key not found\n");
+		break;
+	case RET_SUCCESS:
+		break;
+	}
+}
+
+#ifdef DEBUG
+void
+dump(db, argv)
+	DB *db;
+	char **argv;
+{
+	__bt_dump(db);
+}
+#endif
+
+void
+first(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	int status;
+
+	status = (*db->seq)(db, &key, &data, R_FIRST);
+
+	switch (status) {
+	case RET_ERROR:
+		perror("first/seq");
+		break;
+	case RET_SPECIAL:
+		(void)printf("no more keys\n");
+		break;
+	case RET_SUCCESS:
+		keydata(&key, &data);
+		break;
+	}
+}
+
+void
+get(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	int status;
+
+	key.data = argv[1];
+	if (recno)
+		key.size = sizeof(recno_t);
+	else
+		key.size = strlen(argv[1]) + 1;
+
+	status = (*db->get)(db, &key, &data, 0);
+
+	switch (status) {
+	case RET_ERROR:
+		perror("get/get");
+		break;
+	case RET_SPECIAL:
+		(void)printf("key not found\n");
+		break;
+	case RET_SUCCESS:
+		keydata(&key, &data);
+		break;
+	}
+}
+
+void
+help(db, argv)
+	DB *db;
+	char **argv;
+{
+	int i;
+
+	for (i = 0; commands[i].cmd; i++)
+		if (commands[i].descrip)
+			(void)printf("%s: %s\n",
+			    commands[i].usage, commands[i].descrip);
+}
+
+void
+iafter(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT key, data;
+	int status;
+
+	if (!recno) {
+		(void)fprintf(stderr,
+		    "iafter only available for recno db's.\n");
+		return;
+	}
+	key.data = argv[1];
+	key.size = sizeof(recno_t);
+	data.data = argv[2];
+	data.size = strlen(data.data);
+	status = (db->put)(db, &key, &data, R_IAFTER);
+	switch (status) {
+	case RET_ERROR:
+		perror("iafter/put");
+		break;
+	case RET_SPECIAL:
+		(void)printf("%s (duplicate key)\n", argv[1]);
+		break;
+	case RET_SUCCESS:
+		break;
+	}
+}
+
+void
+ibefore(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT key, data;
+	int status;
+
+	if (!recno) {
+		(void)fprintf(stderr,
+		    "ibefore only available for recno db's.\n");
+		return;
+	}
+	key.data = argv[1];
+	key.size = sizeof(recno_t);
+	data.data = argv[2];
+	data.size = strlen(data.data);
+	status = (db->put)(db, &key, &data, R_IBEFORE);
+	switch (status) {
+	case RET_ERROR:
+		perror("ibefore/put");
+		break;
+	case RET_SPECIAL:
+		(void)printf("%s (duplicate key)\n", argv[1]);
+		break;
+	case RET_SUCCESS:
+		break;
+	}
+}
+
+void
+icursor(db, argv)
+	DB *db;
+	char **argv;
+{
+	int status;
+	DBT data, key;
+
+	key.data = argv[1];
+	if (recno)
+		key.size = sizeof(recno_t);
+	else
+		key.size = strlen(argv[1]) + 1;
+	data.data = argv[2];
+	data.size = strlen(argv[2]) + 1;
+
+	status = (*db->put)(db, &key, &data, R_CURSOR);
+	switch (status) {
+	case RET_ERROR:
+		perror("icursor/put");
+		break;
+	case RET_SPECIAL:
+		(void)printf("%s (duplicate key)\n", argv[1]);
+		break;
+	case RET_SUCCESS:
+		break;
+	}
+}
+
+void
+insert(db, argv)
+	DB *db;
+	char **argv;
+{
+	int status;
+	DBT data, key;
+
+	key.data = argv[1];
+	if (recno)
+		key.size = sizeof(recno_t);
+	else
+		key.size = strlen(argv[1]) + 1;
+	data.data = argv[2];
+	data.size = strlen(argv[2]) + 1;
+
+	status = (*db->put)(db, &key, &data, R_NOOVERWRITE);
+	switch (status) {
+	case RET_ERROR:
+		perror("insert/put");
+		break;
+	case RET_SPECIAL:
+		(void)printf("%s (duplicate key)\n", argv[1]);
+		break;
+	case RET_SUCCESS:
+		break;
+	}
+}
+
+void
+last(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	int status;
+
+	status = (*db->seq)(db, &key, &data, R_LAST);
+
+	switch (status) {
+	case RET_ERROR:
+		perror("last/seq");
+		break;
+	case RET_SPECIAL:
+		(void)printf("no more keys\n");
+		break;
+	case RET_SUCCESS:
+		keydata(&key, &data);
+		break;
+	}
+}
+
+void
+list(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	FILE *fp;
+	int status;
+
+	if ((fp = fopen(argv[1], "w")) == NULL) {
+		(void)fprintf(stderr, "%s: %s\n", argv[1], strerror(errno));
+		return;
+	}
+	status = (*db->seq)(db, &key, &data, R_FIRST);
+	while (status == RET_SUCCESS) {
+		(void)fprintf(fp, "%s\n", key.data);
+		status = (*db->seq)(db, &key, &data, R_NEXT);
+	}
+	(void)fclose(fp);
+	if (status == RET_ERROR)
+		perror("list/seq");
+}
+
+void
+rlist(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	FILE *fp;
+	int status;
+	void *cookie;
+
+	cookie = NULL;
+	if ((fp = fopen(argv[1], "w")) == NULL) {
+		(void)fprintf(stderr, "%s: %s\n", argv[1], strerror(errno));
+		return;
+	}
+	status = bt_rseq(db, &key, &data, &cookie, R_FIRST);
+	while (status == RET_SUCCESS) {
+		(void)fprintf(fp, "%s\n", key.data);
+		status = bt_rseq(db, &key, &data, &cookie, R_NEXT);
+	}
+	(void)fclose(fp);
+	if (status == RET_ERROR)
+		perror("list/seq");
+}
+
+#if 0
+DB *BUGdb;
+void
+load(db, argv)
+	DB *db;
+	char **argv;
+{
+	register char *p, *t;
+	FILE *fp;
+	DBT data, key;
+	recno_t cnt;
+	size_t len;
+	int status;
+	char *lp, buf[16 * 1024];
+
+	BUGdb = db;
+	if ((fp = fopen(argv[1], "r")) == NULL) {
+		(void)fprintf(stderr, "%s: %s\n", argv[1], strerror(errno));
+		return;
+	}
+	(void)printf("loading %s...\n", argv[1]);
+
+	for (cnt = 1; (lp = fgetline(fp, &len)) != NULL; ++cnt) {
+		if (recno) {
+			key.data = &cnt;
+			key.size = sizeof(recno_t);
+			data.data = lp;
+			data.size = len + 1;
+		} else { 
+			key.data = lp;
+			key.size = len + 1;
+			for (p = lp + len - 1, t = buf; p >= lp; *t++ = *p--);
+			*t = '\0';
+			data.data = buf;
+			data.size = len + 1;
+		}
+
+		status = (*db->put)(db, &key, &data, R_NOOVERWRITE);
+		switch (status) {
+		case RET_ERROR:
+			perror("load/put");
+			exit(1);
+		case RET_SPECIAL:
+			if (recno)
+				(void)fprintf(stderr,
+				    "duplicate: %ld {%s}\n", cnt, data.data);
+			else
+				(void)fprintf(stderr,
+				    "duplicate: %ld {%s}\n", cnt, key.data);
+			exit(1);
+		case RET_SUCCESS:
+			break;
+		}
+	}
+	(void)fclose(fp);
+}
+#endif
+
+void
+next(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	int status;
+
+	status = (*db->seq)(db, &key, &data, R_NEXT);
+
+	switch (status) {
+	case RET_ERROR:
+		perror("next/seq");
+		break;
+	case RET_SPECIAL:
+		(void)printf("no more keys\n");
+		break;
+	case RET_SUCCESS:
+		keydata(&key, &data);
+		break;
+	}
+}
+
+void
+previous(db, argv)
+	DB *db;
+	char **argv;
+{
+	DBT data, key;
+	int status;
+
+	status = (*db->seq)(db, &key, &data, R_PREV);
+
+	switch (status) {
+	case RET_ERROR:
+		perror("previous/seq");
+		break;
+	case RET_SPECIAL:
+		(void)printf("no more keys\n");
+		break;
+	case RET_SUCCESS:
+		keydata(&key, &data);
+		break;
+	}
+}
+
+#ifdef DEBUG
+void
+show(db, argv)
+	DB *db;
+	char **argv;
+{
+	BTREE *t;
+	PAGE *h;
+	db_pgno_t pg;
+
+	pg = atoi(argv[1]);
+	t = db->internal;
+	if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL) {
+		(void)printf("getpage of %ld failed\n", pg);
+		return;
+	}
+	if (pg == 0)
+		__bt_dmpage(h);
+	else
+		__bt_dpage(db, h);
+	mpool_put(t->bt_mp, h, 0);
+}
+#endif
+
+#ifdef STATISTICS
+void
+bstat(db, argv)
+	DB *db;
+	char **argv;
+{
+	(void)printf("BTREE\n");
+	__bt_stat(db);
+}
+
+void
+mstat(db, argv)
+	DB *db;
+	char **argv;
+{
+	(void)printf("MPOOL\n");
+	mpool_stat(((BTREE *)db->internal)->bt_mp);
+}
+#endif
+
+void
+keydata(key, data)
+	DBT *key, *data;
+{
+	if (!recno && key->size > 0)
+		(void)printf("%s/", key->data);
+	if (data->size > 0)
+		(void)printf("%s", data->data);
+	(void)printf("\n");
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr,
+	    "usage: %s [-bdluw] [-c cache] [-i file] [-p page] [file]\n",
+	    progname);
+	exit (1);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/dbtest.c b/src/plugins/kdb/db2/libdb2/test/dbtest.c
new file mode 100644
index 0000000000..10a89a6fad
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/dbtest.c
@@ -0,0 +1,768 @@
+/*-
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static char copyright[] =
+"@(#) Copyright (c) 1992, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static char sccsid[] = "@(#)dbtest.c	8.17 (Berkeley) 9/1/94";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "db-int.h"
+#ifdef STATISTICS
+#include "btree.h"
+#endif
+
+enum S { COMMAND, COMPARE, GET, PUT, REMOVE, SEQ, SEQFLAG, KEY, DATA };
+
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+#define ATTR(x) __attribute__(x)
+#else
+#define ATTR(x)
+#endif
+
+void	 compare __P((DBT *, DBT *));
+DBTYPE	 dbtype __P((char *));
+void	 dump __P((DB *, int));
+void	 err __P((const char *, ...)) ATTR ((__format__(__printf__,1,2))) ATTR ((__noreturn__));
+void	 get __P((DB *, DBT *));
+void	 getdata __P((DB *, DBT *, DBT *));
+void	 put __P((DB *, DBT *, DBT *));
+void	 rem __P((DB *, DBT *));
+char	*sflags __P((int));
+void	 synk __P((DB *));
+void	*rfile __P((char *, size_t *));
+void	 seq __P((DB *, DBT *));
+u_int	 setflags __P((char *));
+void	*setinfo __P((DBTYPE, char *));
+void	 usage __P((void));
+void	*xmalloc __P((char *, size_t));
+
+DBTYPE type;				/* Database type. */
+void *infop;				/* Iflags. */
+u_long lineno;				/* Current line in test script. */
+u_int flags;				/* Current DB flags. */
+int ofd = STDOUT_FILENO;		/* Standard output fd. */
+
+DB *XXdbp;				/* Global for gdb. */
+int XXlineno;				/* Fast breakpoint for gdb. */
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	extern int optind;
+	extern char *optarg;
+	enum S command, state;
+	DB *dbp;
+	DBT data, key, keydata;
+	size_t len;
+	int ch, oflags, sflag;
+	char *fname, *infoarg, *p, *t, buf[8 * 1024];
+
+	infoarg = NULL;
+	fname = NULL;
+	oflags = O_CREAT | O_RDWR | O_BINARY;
+	sflag = 0;
+	while ((ch = getopt(argc, argv, "f:i:lo:s")) != -1)
+		switch (ch) {
+		case 'f':
+			fname = optarg;
+			break;
+		case 'i':
+			infoarg = optarg;
+			break;
+		case 'l':
+			oflags |= DB_LOCK;
+			break;
+		case 'o':
+			if ((ofd = open(optarg,
+			    O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
+				err("%s: %s", optarg, strerror(errno));
+			break;
+		case 's':
+			sflag = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 2)
+		usage();
+
+	/* Set the type. */
+	type = dbtype(*argv++);
+
+	/* Open the descriptor file. */
+        if (strcmp(*argv, "-") && freopen(*argv, "r", stdin) == NULL)
+	    err("%s: %s", *argv, strerror(errno));
+
+	/* Set up the db structure as necessary. */
+	if (infoarg == NULL)
+		infop = NULL;
+	else
+		for (p = strtok(infoarg, ",\t "); p != NULL;
+		    p = strtok(0, ",\t "))
+			if (*p != '\0')
+				infop = setinfo(type, p);
+
+	/*
+	 * Open the DB.  Delete any preexisting copy, you almost never
+	 * want it around, and it often screws up tests.
+	 */
+	if (fname == NULL) {
+		p = getenv("TMPDIR");
+		if (p == NULL)
+			p = "/var/tmp";
+		(void)sprintf(buf, "%s/__dbtest", p);
+		fname = buf;
+		(void)unlink(buf);
+	} else  if (!sflag)
+		(void)unlink(fname);
+
+	if ((dbp = dbopen(fname,
+	    oflags, S_IRUSR | S_IWUSR, type, infop)) == NULL)
+		err("dbopen: %s", strerror(errno));
+	XXdbp = dbp;
+
+	state = COMMAND;
+	for (lineno = 1;
+	    (p = fgets(buf, sizeof(buf), stdin)) != NULL; ++lineno) {
+		/* Delete the newline, displaying the key/data is easier. */
+		if (ofd == STDOUT_FILENO && (t = strchr(p, '\n')) != NULL)
+			*t = '\0';
+		if ((len = strlen(buf)) == 0 || isspace((int) *p) || *p == '#')
+			continue;
+
+		/* Convenient gdb break point. */
+		if (XXlineno == lineno)
+			XXlineno = 1;
+		switch (*p) {
+		case 'c':			/* compare */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+			state = KEY;
+			command = COMPARE;
+			break;
+		case 'e':			/* echo */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+			/* Don't display the newline, if CR at EOL. */
+			if (p[len - 2] == '\r')
+				--len;
+			if (write(ofd, p + 1, len - 1) != len - 1 ||
+			    write(ofd, "\n", 1) != 1)
+				err("write: %s", strerror(errno));
+			break;
+		case 'g':			/* get */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+			state = KEY;
+			command = GET;
+			break;
+		case 'p':			/* put */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+			state = KEY;
+			command = PUT;
+			break;
+		case 'r':			/* remove */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+                        if (flags == R_CURSOR) {
+				rem(dbp, &key);
+				state = COMMAND;
+                        } else {
+				state = KEY;
+				command = REMOVE;
+			}
+			break;
+		case 'S':			/* sync */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+			synk(dbp);
+			state = COMMAND;
+			break;
+		case 's':			/* seq */
+			if (state != COMMAND)
+				err("line %lu: not expecting command", lineno);
+			if (flags == R_CURSOR) {
+				state = KEY;
+				command = SEQ;
+			} else
+				seq(dbp, &key);
+			break;
+		case 'f':
+			flags = setflags(p + 1);
+			break;
+		case 'D':			/* data file */
+			if (state != DATA)
+				err("line %lu: not expecting data", lineno);
+			data.data = rfile(p + 1, &data.size);
+			goto ldata;
+		case 'd':			/* data */
+			if (state != DATA)
+				err("line %lu: not expecting data", lineno);
+			data.data = xmalloc(p + 1, len - 1);
+			data.size = len - 1;
+ldata:			switch (command) {
+			case COMPARE:
+				compare(&keydata, &data);
+				break;
+			case PUT:
+				put(dbp, &key, &data);
+				break;
+			default:
+				err("line %lu: command doesn't take data",
+				    lineno);
+			}
+			if (type != DB_RECNO)
+				free(key.data);
+			free(data.data);
+			state = COMMAND;
+			break;
+		case 'K':			/* key file */
+			if (state != KEY)
+				err("line %lu: not expecting a key", lineno);
+			if (type == DB_RECNO)
+				err("line %lu: 'K' not available for recno",
+				    lineno);
+			key.data = rfile(p + 1, &key.size);
+			goto lkey;
+		case 'k':			/* key */
+			if (state != KEY)
+				err("line %lu: not expecting a key", lineno);
+			if (type == DB_RECNO) {
+				static recno_t recno;
+				recno = atoi(p + 1);
+				key.data = &recno;
+				key.size = sizeof(recno);
+			} else {
+				key.data = xmalloc(p + 1, len - 1);
+				key.size = len - 1;
+			}
+lkey:			switch (command) {
+			case COMPARE:
+				getdata(dbp, &key, &keydata);
+				state = DATA;
+				break;
+			case GET:
+				get(dbp, &key);
+				if (type != DB_RECNO)
+					free(key.data);
+				state = COMMAND;
+				break;
+			case PUT:
+				state = DATA;
+				break;
+			case REMOVE:
+				rem(dbp, &key);
+				if ((type != DB_RECNO) && (flags != R_CURSOR))
+					free(key.data);
+				state = COMMAND;
+				break;
+			case SEQ:
+				seq(dbp, &key);
+				if ((type != DB_RECNO) && (flags != R_CURSOR))
+					free(key.data);
+				state = COMMAND;
+				break;
+			default:
+				err("line %lu: command doesn't take a key",
+				    lineno);
+			}
+			break;
+		case 'o':
+			dump(dbp, p[1] == 'r');
+			break;
+		default:
+			err("line %lu: %s: unknown command character",
+			    lineno, p);
+		}
+	}
+#ifdef STATISTICS
+	/*
+	 * -l must be used (DB_LOCK must be set) for this to be
+	 * used, otherwise a page will be locked and it will fail.
+	 */
+	if (type == DB_BTREE && oflags & DB_LOCK)
+		__bt_stat(dbp);
+#endif
+	if (dbp->close(dbp))
+		err("db->close: %s", strerror(errno));
+	(void)close(ofd);
+	exit(0);
+}
+
+#define	NOOVERWRITE	"put failed, would overwrite key\n"
+
+void
+compare(db1, db2)
+	DBT *db1, *db2;
+{
+	register size_t len;
+	register u_char *p1, *p2;
+
+	if (db1->size != db2->size) {
+		printf("compare failed: key->data len %lu != data len %lu\n",
+		    (u_long) db1->size, (u_long) db2->size);
+		exit (1);
+	}
+
+	len = MIN(db1->size, db2->size);
+	for (p1 = db1->data, p2 = db2->data; len--;)
+		if (*p1++ != *p2++) {
+			err("compare failed at offset %d\n",
+			    p1 - (u_char *)db1->data);
+			break;
+		}
+}
+
+void
+get(dbp, kp)
+	DB *dbp;
+	DBT *kp;
+{
+	DBT data;
+
+	switch (dbp->get(dbp, kp, &data, flags)) {
+	case 0:
+		(void)write(ofd, data.data, data.size);
+		if (ofd == STDOUT_FILENO)
+			(void)write(ofd, "\n", 1);
+		break;
+	case -1:
+		err("line %lu: get: %s", lineno, strerror(errno));
+		/* NOTREACHED */
+	case 1:
+#define	NOSUCHKEY	"get failed, no such key\n"
+		if (ofd != STDOUT_FILENO) {
+			(void)write(ofd, NOSUCHKEY, sizeof(NOSUCHKEY) - 1);
+			exit(1);
+		} else
+			(void)fprintf(stderr, "%lu: %.*s: %s",
+			    lineno, (int) MIN(kp->size, 20), (char *) kp->data, 
+				      NOSUCHKEY);
+#undef	NOSUCHKEY
+		break;
+	}
+}
+
+void
+getdata(dbp, kp, dp)
+	DB *dbp;
+	DBT *kp, *dp;
+{
+	switch (dbp->get(dbp, kp, dp, flags)) {
+	case 0:
+		return;
+	case -1:
+		err("line %lu: getdata: %s", lineno, strerror(errno));
+		/* NOTREACHED */
+	case 1:
+		err("line %lu: getdata failed, no such key", lineno);
+		/* NOTREACHED */
+	}
+}
+
+void
+put(dbp, kp, dp)
+	DB *dbp;
+	DBT *kp, *dp;
+{
+	switch (dbp->put(dbp, kp, dp, flags)) {
+	case 0:
+		break;
+	case -1:
+		err("line %lu: put: %s", lineno, strerror(errno));
+		/* NOTREACHED */
+	case 1:
+		(void)write(ofd, NOOVERWRITE, sizeof(NOOVERWRITE) - 1);
+		break;
+	}
+}
+
+void
+rem(dbp, kp)
+	DB *dbp;
+	DBT *kp;
+{
+	switch (dbp->del(dbp, kp, flags)) {
+	case 0:
+		break;
+	case -1:
+		err("line %lu: rem: %s", lineno, strerror(errno));
+		/* NOTREACHED */
+	case 1:
+#define	NOSUCHKEY	"rem failed, no such key\n"
+		if (ofd != STDOUT_FILENO)
+			(void)write(ofd, NOSUCHKEY, sizeof(NOSUCHKEY) - 1);
+		else if (flags != R_CURSOR)
+			(void)fprintf(stderr, "%lu: %.*s: %s", 
+			    lineno, (int) MIN(kp->size, 20), (char *) kp->data, 
+				      NOSUCHKEY);
+		else
+			(void)fprintf(stderr,
+			    "%lu: rem of cursor failed\n", lineno);
+#undef	NOSUCHKEY
+		break;
+	}
+}
+
+void
+synk(dbp)
+	DB *dbp;
+{
+	switch (dbp->sync(dbp, flags)) {
+	case 0:
+		break;
+	case -1:
+		err("line %lu: synk: %s", lineno, strerror(errno));
+		/* NOTREACHED */
+	}
+}
+
+void
+seq(dbp, kp)
+	DB *dbp;
+	DBT *kp;
+{
+	DBT data;
+
+	switch (dbp->seq(dbp, kp, &data, flags)) {
+	case 0:
+		(void)write(ofd, data.data, data.size);
+		if (ofd == STDOUT_FILENO)
+			(void)write(ofd, "\n", 1);
+		break;
+	case -1:
+		err("line %lu: seq: %s", lineno, strerror(errno));
+		/* NOTREACHED */
+	case 1:
+#define	NOSUCHKEY	"seq failed, no such key\n"
+		if (ofd != STDOUT_FILENO)
+			(void)write(ofd, NOSUCHKEY, sizeof(NOSUCHKEY) - 1);
+		else if (flags == R_CURSOR)
+			(void)fprintf(stderr, "%lu: %.*s: %s", 
+			    lineno, (int) MIN(kp->size, 20), (char *) kp->data, 
+				      NOSUCHKEY);
+		else
+			(void)fprintf(stderr,
+			    "%lu: seq (%s) failed\n", lineno, sflags(flags));
+#undef	NOSUCHKEY
+		break;
+	}
+}
+
+void
+dump(dbp, rev)
+	DB *dbp;
+	int rev;
+{
+	DBT key, data;
+	int lflags, nflags;
+
+	if (rev) {
+		lflags = R_LAST;
+		nflags = R_PREV;
+	} else {
+		lflags = R_FIRST;
+		nflags = R_NEXT;
+	}
+	for (;; lflags = nflags)
+		switch (dbp->seq(dbp, &key, &data, lflags)) {
+		case 0:
+			(void)write(ofd, data.data, data.size);
+			if (ofd == STDOUT_FILENO)
+				(void)write(ofd, "\n", 1);
+			break;
+		case 1:
+			goto done;
+		case -1:
+			err("line %lu: (dump) seq: %s",
+			    lineno, strerror(errno));
+			/* NOTREACHED */
+		}
+done:	return;
+}
+	
+u_int
+setflags(s)
+	char *s;
+{
+	char *p;
+
+	for (; isspace((int) *s); ++s);
+	if (*s == '\n' || *s == '\0')
+		return (0);
+	if ((p = strchr(s, '\n')) != NULL)
+		*p = '\0';
+	if (!strcmp(s, "R_CURSOR"))		return (R_CURSOR);
+	if (!strcmp(s, "R_FIRST"))		return (R_FIRST);
+	if (!strcmp(s, "R_IAFTER")) 		return (R_IAFTER);
+	if (!strcmp(s, "R_IBEFORE")) 		return (R_IBEFORE);
+	if (!strcmp(s, "R_LAST")) 		return (R_LAST);
+	if (!strcmp(s, "R_NEXT")) 		return (R_NEXT);
+	if (!strcmp(s, "R_NOOVERWRITE"))	return (R_NOOVERWRITE);
+	if (!strcmp(s, "R_PREV"))		return (R_PREV);
+	if (!strcmp(s, "R_SETCURSOR"))		return (R_SETCURSOR);
+
+	err("line %lu: %s: unknown flag", lineno, s);
+	/* NOTREACHED */
+}
+
+char *
+sflags(lflags)
+	int lflags;
+{
+	switch (lflags) {
+	case R_CURSOR:		return ("R_CURSOR");
+	case R_FIRST:		return ("R_FIRST");
+	case R_IAFTER:		return ("R_IAFTER");
+	case R_IBEFORE:		return ("R_IBEFORE");
+	case R_LAST:		return ("R_LAST");
+	case R_NEXT:		return ("R_NEXT");
+	case R_NOOVERWRITE:	return ("R_NOOVERWRITE");
+	case R_PREV:		return ("R_PREV");
+	case R_SETCURSOR:	return ("R_SETCURSOR");
+	}
+
+	return ("UNKNOWN!");
+}
+	
+DBTYPE
+dbtype(s)
+	char *s;
+{
+	if (!strcmp(s, "btree"))
+		return (DB_BTREE);
+	if (!strcmp(s, "hash"))
+		return (DB_HASH);
+	if (!strcmp(s, "recno"))
+		return (DB_RECNO);
+	err("%s: unknown type (use btree, hash or recno)", s);
+	/* NOTREACHED */
+}
+
+void *
+setinfo(db_type, s)
+	DBTYPE db_type;
+	char *s;
+{
+	static BTREEINFO ib;
+	static HASHINFO ih;
+	static RECNOINFO rh;
+	char *eq;
+
+	if ((eq = strchr(s, '=')) == NULL)
+		err("%s: illegal structure set statement", s);
+	*eq++ = '\0';
+	if (!isdigit((int) *eq))
+		err("%s: structure set statement must be a number", s);
+		
+	switch (db_type) {
+	case DB_BTREE:
+		if (!strcmp("flags", s)) {
+			ib.flags = atoi(eq);
+			return (&ib);
+		}
+		if (!strcmp("cachesize", s)) {
+			ib.cachesize = atoi(eq);
+			return (&ib);
+		}
+		if (!strcmp("maxkeypage", s)) {
+			ib.maxkeypage = atoi(eq);
+			return (&ib);
+		}
+		if (!strcmp("minkeypage", s)) {
+			ib.minkeypage = atoi(eq);
+			return (&ib);
+		}
+		if (!strcmp("lorder", s)) {
+			ib.lorder = atoi(eq);
+			return (&ib);
+		}
+		if (!strcmp("psize", s)) {
+			ib.psize = atoi(eq);
+			return (&ib);
+		}
+		break;
+	case DB_HASH:
+		if (!strcmp("bsize", s)) {
+			ih.bsize = atoi(eq);
+			return (&ih);
+		}
+		if (!strcmp("ffactor", s)) {
+			ih.ffactor = atoi(eq);
+			return (&ih);
+		}
+		if (!strcmp("nelem", s)) {
+			ih.nelem = atoi(eq);
+			return (&ih);
+		}
+		if (!strcmp("cachesize", s)) {
+			ih.cachesize = atoi(eq);
+			return (&ih);
+		}
+		if (!strcmp("lorder", s)) {
+			ih.lorder = atoi(eq);
+			return (&ih);
+		}
+		break;
+	case DB_RECNO:
+		if (!strcmp("flags", s)) {
+			rh.flags = atoi(eq);
+			return (&rh);
+		}
+		if (!strcmp("cachesize", s)) {
+			rh.cachesize = atoi(eq);
+			return (&rh);
+		}
+		if (!strcmp("lorder", s)) {
+			rh.lorder = atoi(eq);
+			return (&rh);
+		}
+		if (!strcmp("reclen", s)) {
+			rh.reclen = atoi(eq);
+			return (&rh);
+		}
+		if (!strcmp("bval", s)) {
+			rh.bval = atoi(eq);
+			return (&rh);
+		}
+		if (!strcmp("psize", s)) {
+			rh.psize = atoi(eq);
+			return (&rh);
+		}
+		break;
+	}
+	err("%s: unknown structure value", s);
+	/* NOTREACHED */
+}
+
+void *
+rfile(name, lenp)
+	char *name;
+	size_t *lenp;
+{
+	struct stat sb;
+	void *p;
+	int fd;
+	char *np;
+
+	for (; isspace((int) *name); ++name);
+	if ((np = strchr(name, '\n')) != NULL)
+		*np = '\0';
+	if ((fd = open(name, O_RDONLY, 0)) < 0 ||
+	    fstat(fd, &sb))
+		err("%s: %s\n", name, strerror(errno));
+#ifdef NOT_PORTABLE
+	if (sb.st_size > (off_t)SIZE_T_MAX)
+		err("%s: %s\n", name, strerror(E2BIG));
+#endif
+	if ((p = (void *)malloc((u_int)sb.st_size)) == NULL)
+		err("%s", strerror(errno));
+	(void)read(fd, p, (int)sb.st_size);
+	*lenp = sb.st_size;
+	(void)close(fd);
+	return (p);
+}
+
+void *
+xmalloc(text, len)
+	char *text;
+	size_t len;
+{
+	void *p;
+
+	if ((p = (void *)malloc(len)) == NULL)
+		err("%s", strerror(errno));
+	memmove(p, text, len);
+	return (p);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr,
+	    "usage: dbtest [-l] [-f file] [-i info] [-o file] type script\n");
+	exit(1);
+}
+
+#ifdef __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+void
+#ifdef __STDC__
+err(const char *fmt, ...)
+#else
+err(fmt, va_alist)
+	char *fmt;
+        va_dcl
+#endif
+{
+	va_list ap;
+#ifdef __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)fprintf(stderr, "dbtest: ");
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	(void)fprintf(stderr, "\n");
+	exit(1);
+	/* NOTREACHED */
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/dictionary b/src/plugins/kdb/db2/libdb2/test/dictionary
new file mode 100644
index 0000000000..53640f0164
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/dictionary
@@ -0,0 +1,308 @@
+abintrme
+ablatweo
+agdbevea
+aglamber
+aicehayt
+alerover
+anadanth
+ancmirtt
+ancthada
+angcther
+antasikt
+arathmsm
+arescofa
+arthatea
+asallyth
+asathedl
+ascelass
+athaneal
+atheneri
+atheryit
+athiopep
+athysidc
+atyhtiti
+auletard
+aytthepr
+bedthesa
+beiofttw
+bemofrda
+bertedud
+bessdide
+bestiemb
+blllanof
+bllssunt
+blstther
+bttelthh
+bulyousi
+bupedire
+buseatsd
+butritat
+byeditam
+cedvecur
+censaith
+centhfro
+centitar
+ceourire
+cetheaso
+chancora
+chavengl
+chederas
+chemsywh
+civadayo
+ckedacag
+ckstiptr
+colither
+congchin
+corepppl
+cronoria
+cthilath
+cthouthe
+ctofowon
+cumetbry
+dbethere
+degeerin
+detherai
+dingthin
+dryslyse
+dscesild
+ealecerm
+edftserh
+efosondi
+eherrreg
+emidesja
+ereananm
+estersns
+etedtili
+evermerh
+falsuran
+faringsi
+fawerist
+fcedethe
+fedhessh
+fedlerca
+feupbori
+ffeedift
+fllbasia
+foftabll
+fomehage
+fotsenki
+fwisudls
+ggeuptha
+gswofryt
+hedcecou
+hereacun
+huvedpth
+iabengre
+ianfovin
+iaresice
+iasmived
+idengedi
+ilftisut
+ilinefem
+imeorran
+imsstoft
+inararto
+indanrei
+ingelaly
+ingeored
+inmotiom
+inoatlfr
+inoviler
+insedihe
+intaspan
+intowade
+inyfeprt
+iobloinc
+ionepuse
+iourofig
+ireeingi
+irreland
+irsfandb
+isewhell
+isocisad
+isriacth
+istaverr
+ithmblet
+itoingri
+itongala
+itsgrint
+ivyttisa
+laltthea
+lanesmef
+lanonepi
+lerithay
+lllmeris
+lysatspa
+lysceert
+masishio
+mathmmat
+meastrei
+medengny
+medwindb
+membonam
+moronash
+mpeotlin
+msomirei
+msrmstri
+mstirtis
+nbempeef
+ncheckno
+nddtthec
+ndilymor
+nditheiv
+ndoncath
+nenkingo
+ngryasth
+nichelnd
+nndarrof
+nongeatt
+noviearc
+npecheca
+nsttmema
+nwiowhan
+oalsaldt
+obullury
+odtenens
+offorind
+ofoditin
+ogarofab
+olossofe
+olspooth
+omajorul
+omantrvi
+omawevat
+onotorit
+oorendbe
+oosarang
+othowong
+otinffte
+ouatheno
+ountshep
+ouputope
+owhesatu
+owiaindh
+padisath
+pangream
+pawicofa
+pendamam
+pepofond
+peroncti
+perysege
+petotith
+plocarov
+pomasbor
+powholyi
+ppllosof
+pptinoma
+psenesff
+puiondit
+reestand
+rendlabl
+rerathsy
+rewathat
+rirndiff
+ritricui
+samasome
+satameer
+sathecur
+sbespral
+sconbeis
+sedfinhe
+sharveon
+shhoftrd
+sianthem
+sieaveve
+simedera
+sinandff
+sinulsma
+sllobofl
+sndfermh
+soffatic
+soingris
+songiorb
+sthottsa
+suewemat
+swicales
+tagttisf
+tanalatt
+tancodbo
+tarethal
+tbisesia
+teftyall
+tengstwh
+tepeshth
+teranand
+tevinohi
+tgthehal
+thansirs
+thecequs
+thereaco
+therimut
+therorea
+thestiom
+theveame
+thhastth
+thiasatt
+thidirve
+thingbaa
+thithbed
+thovires
+thswenpe
+thublthe
+tiamarss
+tincthes
+tindtofo
+tinedave
+tisanwex
+tlarnste
+tleicorb
+tnymesie
+toftemal
+tombeasw
+torarsen
+totheheo
+toudanty
+tremywel
+treonove
+trhandfy
+trrhmont
+trysnter
+tssasofo
+ttemaith
+ttiserds
+ttorissa
+tuiabeoi
+twirfton
+tyhentha
+tyngorti
+tyoarich
+ucatbouc
+ungyconh
+untinore
+uopsaren
+upecmuit
+ureaidrb
+usinittr
+ussofedt
+usunochp
+utbapofo
+veveplel
+vimathea
+walondui
+wavairet
+waysioft
+wceempil
+wealttig
+wefondio
+werdtian
+weswevar
+whaclthe
+wheanler
+wheiforv
+whisurtr
+whrithat
+wiesulci
+wirofrec
+witthile
+wtserodr
+ybutherr
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/Makefile b/src/plugins/kdb/db2/libdb2/test/hash1.tests/Makefile
new file mode 100644
index 0000000000..348a8f818b
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/Makefile
@@ -0,0 +1,43 @@
+#	@(#)Makefile	8.16 (Berkeley) 11/20/95
+
+ALL = driver2 tcreat3 tdel thash4 tread2 tseq tverify
+OBJ = driver2.o tcreat3.o tdel.o thash4.o tread2.o tseq.o tverify.o
+CC = gcc
+
+all: ${ALL}
+
+# Uncomment the STAT line get hash and btree statistical use info.  This
+# also forces ld to load the btree debug functions for use by gdb, which
+# is useful.  The db library has to be compiled with -DSTATISTICS as well.
+INC=	-I${PORTDIR}/include -I${PORTDIR}
+OORG=	-g
+#STAT=	-DSTATISTICS
+CFLAGS=	-D__DBINTERFACE_PRIVATE -DDEBUG ${STAT} ${OORG} ${INC}
+
+tcreat3: tcreat3.o ${PORTDIR}/libdb.a
+	${CC} -o $@ tcreat3.o ${PORTDIR}/libdb.a
+
+tdel: tdel.o ${PORTDIR}/libdb.a
+	${CC} -o $@ tdel.o ${PORTDIR}/libdb.a
+
+thash4: thash4.o ${PORTDIR}/libdb.a
+	${CC} -o $@ thash4.o ${PORTDIR}/libdb.a
+
+tread2: tread2.o ${PORTDIR}/libdb.a
+	${CC} -o $@ tread2.o ${PORTDIR}/libdb.a
+
+tseq: tseq.o ${PORTDIR}/libdb.a
+	${CC} -o $@ tseq.o ${PORTDIR}/libdb.a
+
+tverify: tverify.o ${PORTDIR}/libdb.a
+	${CC} -o $@ tverify.o ${PORTDIR}/libdb.a
+
+driver2: driver2.o ${PORTDIR}/libdb.a
+	${CC} -o $@ driver2.o ${PORTDIR}/libdb.a
+
+strerror.o: ${PORTDIR}/clib/strerror.c
+	${CC} -c ${PORTDIR}/clib/strerror.c
+
+clean:
+	rm -f *.core gmon.out ${ALL} ${OBJ} t1 t2 t3
+
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/driver2.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/driver2.c
new file mode 100644
index 0000000000..6a3b432cb6
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/driver2.c
@@ -0,0 +1,114 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)driver2.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+/*
+ * Test driver, to try to tackle the large ugly-split problem.
+ */
+
+#include <sys/file.h>
+#include <stdio.h>
+#include "ndbm.h"
+
+int my_hash(key, len)
+	char	*key;
+	int	len;
+{
+	return(17);		/* So I'm cruel... */
+}
+
+main(argc, argv)
+	int	argc;
+{
+	DB	*db;
+	DBT	key, content;
+	char	keybuf[2049];
+	char	contentbuf[2049];
+	char	buf[256];
+	int	i;
+	HASHINFO	info;
+
+	info.bsize = 1024;
+	info.ffactor = 5;
+	info.nelem = 1;
+	info.cachesize = NULL;
+#ifdef HASH_ID_PROGRAM_SPECIFIED
+	info.hash_id = HASH_ID_PROGRAM_SPECIFIED;
+	info.hash_func = my_hash;
+#else
+	info.hash = my_hash;
+#endif
+	info.lorder = 0;
+	if (!(db = dbopen("bigtest", O_RDWR | O_CREAT | O_BINARY, 0644, DB_HASH, &info))) {
+		sprintf(buf, "dbopen: failed on file bigtest");
+		perror(buf);
+		exit(1);
+	}
+	srand(17);
+	key.data = keybuf;
+	content.data = contentbuf;
+	memset(keybuf, '\0', sizeof(keybuf));
+	memset(contentbuf, '\0', sizeof(contentbuf));
+	for (i=1; i <= 500; i++) {
+		key.size = 128 + (rand()&1023);
+		content.size = 128 + (rand()&1023);
+/*		printf("%d: Key size %d, data size %d\n", i, key.size,
+		       content.size); */
+		sprintf(keybuf, "Key #%d", i);
+		sprintf(contentbuf, "Contents #%d", i);
+		if ((db->put)(db, &key, &content, R_NOOVERWRITE)) {
+			sprintf(buf, "dbm_store #%d", i);
+			perror(buf);
+		}
+	}
+	if ((db->close)(db)) {
+		perror("closing hash file");
+		exit(1);
+	}
+	exit(0);
+}
+
+	
+
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/makedb.sh b/src/plugins/kdb/db2/libdb2/test/hash1.tests/makedb.sh
new file mode 100644
index 0000000000..15901de193
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/makedb.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+#
+#	@(#)makedb.sh	8.1 (Berkeley) 6/4/93
+
+awk '{i++; print $0; print i;}' /usr/local/lib/dict/words > WORDS
+ls /bin /usr/bin /usr/ucb /etc | egrep '^(...|....|.....|......)$' | \
+sort | uniq | \
+awk '{
+	printf "%s\n", $0
+	for (i = 0; i < 1000; i++)
+		printf "%s+", $0
+	printf "\n"
+}' > LONG.DATA
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/tcreat3.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tcreat3.c
new file mode 100644
index 0000000000..f11487b320
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tcreat3.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tcreat3.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <stdio.h>
+#include "db-int.h"
+
+#define INITIAL	25000
+#define MAXWORDS    25000	       /* # of elements in search table */
+
+char	wp1[8192];
+char	wp2[8192];
+main(argc, argv)
+char **argv;
+{
+	DBT item, key;
+	DB	*dbp;
+	HASHINFO ctl;
+	FILE *fp;
+	int	trash;
+
+	int i = 0;
+
+	argv++;
+	ctl.hash = NULL;
+	ctl.bsize = atoi(*argv++);
+	ctl.ffactor = atoi(*argv++);
+	ctl.nelem = atoi(*argv++);
+	ctl.lorder = 0;
+	if (!(dbp = dbopen( "hashtest",
+	    O_CREAT|O_TRUNC|O_RDWR|O_BINARY, 0600, DB_HASH, &ctl))){
+		/* create table */
+		fprintf(stderr, "cannot create: hash table (size %d)\n",
+			INITIAL);
+		exit(1);
+	}
+
+	key.data = wp1;
+	item.data = wp2;
+	while ( fgets(wp1, 8192, stdin) &&
+		fgets(wp2, 8192, stdin) &&
+		i++ < MAXWORDS) {
+/*
+* put info in structure, and structure in the item
+*/
+		key.size = strlen(wp1);
+		item.size = strlen(wp2);
+
+/*
+ * enter key/data pair into the table
+ */
+		if ((dbp->put)(dbp, &key, &item, R_NOOVERWRITE) != NULL) {
+			fprintf(stderr, "cannot enter: key %s\n",
+				item.data);
+			exit(1);
+		}			
+	}
+
+	(dbp->close)(dbp);
+	exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/tdel.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tdel.c
new file mode 100644
index 0000000000..826611486d
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tdel.c
@@ -0,0 +1,122 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tdel.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include "db-int.h"
+#include <stdio.h>
+
+#define INITIAL	25000
+#define MAXWORDS    25000	       /* # of elements in search table */
+
+/* Usage: thash pagesize fillfactor file */
+char	wp1[8192];
+char	wp2[8192];
+main(argc, argv)
+char **argv;
+{
+	DBT item, key;
+	DB	*dbp;
+	HASHINFO ctl;
+	FILE *fp;
+	int	stat;
+
+	int i = 0;
+
+	argv++;
+	ctl.nelem = INITIAL;
+	ctl.hash = NULL;
+	ctl.bsize = atoi(*argv++);
+	ctl.ffactor = atoi(*argv++);
+	ctl.cachesize = 1024 * 1024;	/* 1 MEG */
+	ctl.lorder = 0;
+	argc -= 2;
+	if (!(dbp = dbopen( NULL, O_CREAT|O_RDWR|O_BINARY, 0400, DB_HASH, &ctl))) {
+		/* create table */
+		fprintf(stderr, "cannot create: hash table size %d)\n",
+			INITIAL);
+		exit(1);
+	}
+
+	key.data = wp1;
+	item.data = wp2;
+	while ( fgets(wp1, 8192, stdin) &&
+		fgets(wp2, 8192, stdin) &&
+		i++ < MAXWORDS) {
+/*
+* put info in structure, and structure in the item
+*/
+		key.size = strlen(wp1);
+		item.size = strlen(wp2);
+
+/*
+ * enter key/data pair into the table
+ */
+		if ((dbp->put)(dbp, &key, &item, R_NOOVERWRITE) != NULL) {
+			fprintf(stderr, "cannot enter: key %s\n",
+				item.data);
+			exit(1);
+		}			
+	}
+
+	if ( --argc ) {
+		fp = fopen ( argv[0], "r");
+		i = 0;
+		while ( fgets(wp1, 8192, fp) &&
+			fgets(wp2, 8192, fp) &&
+			i++ < MAXWORDS) {
+		    key.size = strlen(wp1);
+		    stat = (dbp->del)(dbp, &key, 0);
+		    if (stat) {
+			fprintf ( stderr, "Error retrieving %s\n", key.data );
+			exit(1);
+		    } 
+		}
+		fclose(fp);
+	}
+	(dbp->close)(dbp);
+	exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/testit b/src/plugins/kdb/db2/libdb2/test/hash1.tests/testit
new file mode 100644
index 0000000000..c80dc4e69b
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/testit
@@ -0,0 +1,154 @@
+#!/bin/csh -f
+#
+#	@(#)testit	8.1 (Berkeley) 6/4/93
+#
+
+echo ""
+echo "PAGE FILL "
+set name=WORDS
+	set i = 256
+	foreach j ( 11 14 21 )
+	    echo "thash4 $i $j"
+	    ./thash4 $i $j 25000 65536 $name < $name
+	end
+	set i = 512
+	foreach j ( 21 28 43 )
+	    echo "thash4 $i $j"
+	    ./thash4 $i $j 25000 65536  $name < $name
+	end
+	set i = 1024
+	foreach j ( 43 57 85 )
+	    echo "thash4 $i $j"
+	    ./thash4 $i $j 25000 65536 $name < $name
+	end
+	set i = 2048
+	foreach j ( 85 114 171 )
+	    echo "thash4 $i $j"
+	    ./thash4 $i $j 25000 65536 $name < $name
+	end
+	set i = 4096
+	foreach j ( 171 228 341 )
+	    echo "thash4 $i $j"
+	    ./thash4 $i $j 25000 65536 $name < $name
+	end
+	set i = 8192
+	foreach j ( 341 455 683 )
+	    echo "thash4 $i $j"
+	    ./thash4 $i $j 25000 65536 $name < $name
+	end
+	echo "PAGE FILL "
+	set i = 256
+	foreach j ( 11 14 21 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 25000 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 512
+	foreach j ( 21 28 43 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 25000 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 1024
+	foreach j ( 43 57 85 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 25000 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 2048
+	foreach j ( 85 114 171 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 25000 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 4096
+	foreach j ( 171 228 341 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 25000 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 8192
+	foreach j ( 341 455 683 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 25000 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+set name=LONG.DATA
+	set i = 1024
+	foreach j ( 1 2 4 )
+	    echo ./thash4 $i $j 600 65536 $name 
+	    ./thash4 $i $j 600 65536 $name < $name
+	end
+
+	set i = 2048
+	foreach j ( 1 2 4 )
+	    echo ./thash4 $i $j 600 65536 $name 
+	    ./thash4 $i $j 600 65536 $name < $name
+	end
+	set i = 4096
+	foreach j ( 1 2 4 )
+	    echo ./thash4 $i $j 600 65536 $name 
+	    ./thash4 $i $j 600 65536 $name < $name
+	end
+	set i = 8192
+	foreach j ( 2 4 8 )
+	    echo ./thash4 $i $j 600 65536 $name 
+	    ./thash4 $i $j 600 65536 $name < $name
+	end
+	echo "PAGE FILL "
+	set i = 1024
+	foreach j ( 1 2 4 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 600 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 2048
+	foreach j ( 1 2 4 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 600 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 4096
+	foreach j ( 1 2 4 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 600 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+	set i = 8192
+	foreach j ( 2 4 8 )
+	    echo "$i"_"$j"
+	    ./tcreat3 $i $j 600 $name < $name
+	    ./tread2 65536 < $name
+	    ./tverify $name < $name
+	    ./tseq > /dev/null
+	    ./tdel $i $j  $name < $name
+	end
+
+./driver2
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/thash4.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/thash4.c
new file mode 100644
index 0000000000..b15b617bc7
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/thash4.c
@@ -0,0 +1,131 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)thash4.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <stdio.h>
+#include <errno.h>
+#include "db-int.h"
+
+#define INITIAL	25000
+#define MAXWORDS    25000	       /* # of elements in search table */
+
+/* Usage: thash pagesize fillfactor file */
+char	wp1[8192];
+char	wp2[8192];
+main(argc, argv)
+char **argv;
+{
+	DBT item, key, res;
+	DB *dbp;
+	HASHINFO ctl;
+	FILE *fp;
+	int	stat;
+	time_t	t;
+
+	int i = 0;
+
+	argv++;
+	ctl.hash = NULL;
+	ctl.bsize = atoi(*argv++);
+	ctl.ffactor = atoi(*argv++);
+	ctl.nelem = atoi(*argv++);
+	ctl.cachesize = atoi(*argv++);
+	ctl.lorder = 0;
+	if (!(dbp = dbopen( NULL, O_CREAT|O_RDWR|O_BINARY, 0400, DB_HASH, &ctl))) {
+		/* create table */
+		fprintf(stderr, "cannot create: hash table size %d)\n",
+			INITIAL);
+		fprintf(stderr, "\terrno: %d\n", errno);
+		exit(1);
+	}
+
+	key.data = wp1;
+	item.data = wp2;
+	while ( fgets(wp1, 8192, stdin) && 
+		fgets(wp2, 8192, stdin) && 
+		i++ < MAXWORDS) {
+/*
+* put info in structure, and structure in the item
+*/
+		key.size = strlen(wp1);
+		item.size = strlen(wp2);
+
+/*
+ * enter key/data pair into the table
+ */
+		if ((dbp->put)(dbp, &key, &item, R_NOOVERWRITE) != NULL) {
+			fprintf(stderr, "cannot enter: key %s\n",
+				item.data);
+			fprintf(stderr, "\terrno: %d\n", errno);
+			exit(1);
+		}			
+	}
+
+	if ( --argc ) {
+		fp = fopen ( argv[0], "r");
+		i = 0;
+		while ( fgets(wp1, 256, fp) && 
+			fgets(wp2, 8192, fp) && 
+			i++ < MAXWORDS) {
+
+		    key.size = strlen(wp1);
+		    stat = (dbp->get)(dbp, &key, &res, 0);
+		    if (stat < 0 ) {
+			fprintf ( stderr, "Error retrieving %s\n", key.data );
+			fprintf(stderr, "\terrno: %d\n", errno);
+			exit(1);
+		    } else if ( stat > 0 ) {
+			fprintf ( stderr, "%s not found\n", key.data );
+			fprintf(stderr, "\terrno: %d\n", errno);
+			exit(1);
+		    }
+		}
+		fclose(fp);
+	}
+	dbp->close(dbp);
+	exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/tread2.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tread2.c
new file mode 100644
index 0000000000..1e2cc4c503
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tread2.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tread2.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <stdio.h>
+#include "db-int.h"
+
+#define INITIAL	25000
+#define MAXWORDS    25000	       /* # of elements in search table */
+
+typedef struct {		       /* info to be stored */
+	int num, siz;
+} info;
+
+char	wp1[8192];
+char	wp2[8192];
+main(argc, argv)
+char **argv;
+{
+	DBT item, key, res;
+	DB	*dbp;
+	HASHINFO ctl;
+	int	stat;
+
+	int i = 0;
+
+	ctl.nelem = INITIAL;
+	ctl.hash = NULL;
+	ctl.bsize = 64;
+	ctl.ffactor = 1;
+	ctl.cachesize = atoi(*argv++);
+	ctl.lorder = 0;
+	if (!(dbp = dbopen( "hashtest", O_RDONLY|O_BINARY, 0400, DB_HASH, &ctl))) {
+		/* create table */
+		fprintf(stderr, "cannot open: hash table\n" );
+		exit(1);
+	}
+
+	key.data = wp1;
+	item.data = wp2;
+	while ( fgets(wp1, 8192, stdin) &&
+		fgets(wp2, 8192, stdin) &&
+		i++ < MAXWORDS) {
+/*
+* put info in structure, and structure in the item
+*/
+		key.size = strlen(wp1);
+		item.size = strlen(wp2);
+
+		stat = (dbp->get)(dbp, &key, &res,0);
+		if (stat < 0) {
+		    fprintf ( stderr, "Error retrieving %s\n", key.data );
+		    exit(1);
+		} else if ( stat > 0 ) {
+		    fprintf ( stderr, "%s not found\n", key.data );
+		    exit(1);
+		}
+	}
+	(dbp->close)(dbp);
+	exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/tseq.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tseq.c
new file mode 100644
index 0000000000..d2d36862d1
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tseq.c
@@ -0,0 +1,88 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tseq.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <stdio.h>
+#include "db-int.h"
+
+#define INITIAL	25000
+#define MAXWORDS    25000	       /* # of elements in search table */
+
+
+char	wp[8192];
+char	cp[8192];
+main(argc, argv)
+char **argv;
+{
+	DBT item, key, res;
+	DB	*dbp;
+	FILE *fp;
+	int	stat;
+
+	if (!(dbp = dbopen( "hashtest", O_RDONLY|O_BINARY, 0400, DB_HASH, NULL))) {
+		/* create table */
+		fprintf(stderr, "cannot open: hash table\n" );
+		exit(1);
+	}
+
+/*
+* put info in structure, and structure in the item
+*/
+	for ( stat = (dbp->seq) (dbp, &res, &item, 1 ); 
+	      stat == 0;
+	      stat = (dbp->seq) (dbp, &res, &item, 0 ) ) {
+
+	      memcpy ( wp, res.data, res.size );
+	      wp[res.size] = 0;
+	      memcpy ( cp, item.data, item.size );
+	      cp[item.size] = 0;
+
+	      printf ( "%s %s\n", wp, cp );
+	}
+	(dbp->close)(dbp);
+	exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash1.tests/tverify.c b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tverify.c
new file mode 100644
index 0000000000..4747804f76
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash1.tests/tverify.c
@@ -0,0 +1,107 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)tverify.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <stdio.h>
+#include "db-int.h"
+
+#define INITIAL	25000
+#define MAXWORDS    25000	       /* # of elements in search table */
+
+typedef struct {		       /* info to be stored */
+	int num, siz;
+} info;
+
+char	wp1[8192];
+char	wp2[8192];
+main(argc, argv)
+char **argv;
+{
+	DBT key, res;
+	DB	*dbp;
+	HASHINFO ctl;
+	int	trash;
+	int	stat;
+
+	int i = 0;
+
+	ctl.nelem = INITIAL;
+	ctl.hash = NULL;
+	ctl.bsize = 64;
+	ctl.ffactor = 1;
+	ctl.cachesize = 1024 * 1024;	/* 1 MEG */
+	ctl.lorder = 0;
+	if (!(dbp = dbopen( "hashtest", O_RDONLY|O_BINARY, 0400, DB_HASH, &ctl))) {
+		/* create table */
+		fprintf(stderr, "cannot open: hash table\n" );
+		exit(1);
+	}
+
+	key.data = wp1;
+	while ( fgets(wp1, 8192, stdin) &&
+		fgets(wp2, 8192, stdin) &&
+		i++ < MAXWORDS) {
+/*
+* put info in structure, and structure in the item
+*/
+		key.size = strlen(wp1);
+
+		stat = (dbp->get)(dbp, &key, &res,0);
+		if (stat < 0) {
+		    fprintf ( stderr, "Error retrieving %s\n", key.data );
+		    exit(1);
+		} else if ( stat > 0 ) {
+		    fprintf ( stderr, "%s not found\n", key.data );
+		    exit(1);
+		}
+		if ( memcmp ( res.data, wp2, res.size ) ) {
+		    fprintf ( stderr, "data for %s is incorrect.  Data was %s.  Should have been %s\n", key.data, res.data, wp2 );
+		}
+	}
+	(dbp->close)(dbp);
+	exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash2.tests/README b/src/plugins/kdb/db2/libdb2/test/hash2.tests/README
new file mode 100644
index 0000000000..f29ccf7e1b
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash2.tests/README
@@ -0,0 +1,72 @@
+#	@(#)README	8.1 (Berkeley) 6/4/93
+
+This package implements a superset of the hsearch and dbm/ndbm libraries.
+
+Test Programs:
+	All test programs which need key/data pairs expect them entered
+	with key and data on separate lines
+
+	tcreat3.c	
+		Takes 
+			bucketsize (bsize), 
+			fill factor (ffactor), and
+			initial number of elements (nelem).  
+		Creates a hash table named hashtest containing the 
+		keys/data pairs entered from standard in.
+	thash4.c
+		Takes
+			bucketsize (bsize), 
+			fill factor (ffactor), 
+			initial number of elements (nelem)
+			bytes of cache (ncached), and
+			file from which to read data  (fname)
+		Creates a table from the key/data pairs on standard in and
+		then does a read of each key/data in fname
+	tdel.c
+		Takes
+			bucketsize (bsize), and
+			fill factor (ffactor).
+			file from which to read data (fname)
+		Reads each key/data pair from fname and deletes the
+		key from the hash table hashtest
+	tseq.c
+		Reads the key/data pairs in the file hashtest and writes them
+		to standard out.
+	tread2.c
+		Takes
+			butes of cache (ncached).
+		Reads key/data pairs from standard in and looks them up
+		in the file hashtest.
+	tverify.c
+		Reads key/data pairs from standard in, looks them up
+		in the file hashtest, and verifies that the data is
+		correct.
+
+NOTES:
+
+The file search.h is provided for using the hsearch compatible interface
+on BSD systems.  On System V derived systems, search.h should appear in 
+/usr/include.
+
+The man page ../man/db.3 explains the interface to the hashing system.
+The file hash.ps is a postscript copy of a paper explaining
+the history, implementation, and performance of the hash package.
+
+"bugs" or idiosyncracies
+
+If you have a lot of overflows, it is possible to run out of overflow
+pages.  Currently, this will cause a message to be printed on stderr.
+Eventually, this will be indicated by a return error code.
+
+If you are using the ndbm interface and exit without flushing or closing the
+file, you may lose updates since the package buffers all writes.  Also,
+the db interface only creates a single database file.  To avoid overwriting
+the user's original file, the suffix ".db" is appended to the file name
+passed to dbm_open.  Additionally, if your code "knows" about the historic
+.dir and .pag files, it will break.  
+
+There is a fundamental difference between this package and the old hsearch.
+Hsearch requires the user to maintain the keys and data in the application's
+allocated memory while hash takes care of all storage management.  The down
+side is that the byte strings passed in the ENTRY structure must be null
+terminated (both the keys and the data).
diff --git a/src/plugins/kdb/db2/libdb2/test/hash2.tests/bigtest.c b/src/plugins/kdb/db2/libdb2/test/hash2.tests/bigtest.c
new file mode 100644
index 0000000000..81c559ad2a
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash2.tests/bigtest.c
@@ -0,0 +1,76 @@
+#include "db-int.h"
+#include <stdio.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <stdlib.h>
+
+int
+main(void)
+{
+	HASHINFO info;
+	DB *db;
+	DBT key, value, returned;
+	int *data;
+	int n, i;
+
+	info.bsize = 512;
+	info.cachesize = 500;
+	info.lorder = 0;
+	info.ffactor = 4;
+	info.nelem = 0;
+	info.hash = NULL;
+
+	db = dbopen("big2.db", O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0664, DB_HASH, &info);
+	data = malloc(800 * sizeof(int));
+	for (n = 0; n < 800; n++)
+		data[n] = 0xDEADBEEF;
+	key.size = sizeof(int);
+	key.data = &n;
+	value.size = 800 * sizeof(int);
+	value.data = (void *)data;
+
+	for (n = 0; n < 200000; n++) {
+		returned.data = NULL;
+		if (n == 4627)
+			printf("");
+		if (n % 50 == 0) 
+			printf("put n = %d\n", n);
+		if (db->put(db, &key, &value, 0) != 0)	
+			printf("put error, n = %d\n", n);
+		if (db->get(db, &key, &returned, 0) != 0)
+			printf("Immediate get error, n = %d\n", n);
+		assert (returned.size == 3200);
+		for (i = 0; i < 800; i++)
+			if (((int *)returned.data)[i] != 0xDEADBEEF)
+				printf("ERRORRRRRR!!!\n");
+
+	}
+
+	for (n = 0; n < 200000; n++) {
+		if (n % 50 == 0) 
+			printf("seq n = %d\n", n);
+		if ((db->seq(db, &key, &returned, 0)) != 0)
+			printf("Seq error, n = %d\n", n);
+
+		assert(returned.size == 3200);
+
+		for (i = 0; i < 800; i++)
+			if (((int *)returned.data)[i] != 0xDEADBEEF)
+				printf("ERRORRRRRR!!! seq %d\n", n);
+	}		
+
+	for (n = 0; n < 2000; n++) {
+		if (n % 50 == 0) 
+			printf("get n = %d\n", n);
+		if (db->get(db, &key, &returned, 0) != 0)
+			printf("Late get error, n = %d\n", n);
+		assert(returned.size == 1200);
+		for (i = 0; i < 300; i++)
+			if (((int *)returned.data)[i] != 0xDEADBEEF)
+				printf("ERRORRRRRR!!!, get %d\n", n);
+	}
+   	db->close(db);
+	free(value.data);
+	return(0);
+}
+
diff --git a/src/plugins/kdb/db2/libdb2/test/hash2.tests/passtest.c b/src/plugins/kdb/db2/libdb2/test/hash2.tests/passtest.c
new file mode 100644
index 0000000000..adb72c004b
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash2.tests/passtest.c
@@ -0,0 +1,184 @@
+#include "db-int.h"
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+
+extern int hash_expansions;
+
+int
+main(void)
+{
+    FILE *keys, *vals;
+    DB *db;
+    DBT key, val;
+    char *key_line, *val_line, *get_key, *get_val, *old, *key2;
+    HASHINFO passwd;
+    int n = 0, i = 0, expected;
+   
+    key_line = (char *)malloc(100);
+    val_line = (char *)malloc(300);
+    old = (char *)malloc(300);
+
+    keys = fopen("yp.keys", "rt");
+    vals = fopen("yp.total", "rt");
+
+    passwd.bsize =  1024;
+    passwd.cachesize = 1024 * 1024;
+    passwd.ffactor = 10;
+    passwd.hash = NULL;
+    passwd.nelem = 0;
+    passwd.lorder = 4321;
+	
+
+    db = dbopen("/usr/tmp/passwd.db", O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0664, DB_HASH, 
+		&passwd);
+    if (!db) {
+	fprintf(stderr, "create_db: couldn't create database file\n");
+	exit(1);
+    }
+ 
+    while ((key_line = fgets(key_line, 100, keys)) != NULL) {
+	if (n % 1000 == 0)
+	  fprintf(stderr, "Putting #%d.\n", n);
+	n++;
+	fgets(val_line, 300, vals);
+	key.size = strlen(key_line);
+	key.data = (void *)key_line;
+	val.size = strlen(val_line);
+	val.data = (void *)val_line;
+	if (db->put(db, &key, &val, 0) != 0)
+	  fprintf(stderr, "Put error, n = %d\n", n);
+	if (db->get(db, &key, &val, 0) != 0)
+	  fprintf(stderr, "Immediate get error, n = %d\n", n);
+    }
+    fprintf(stderr, "Done with put!\n");
+    free(key_line);	
+    free(val_line);
+    fclose(keys);
+    fclose(vals);
+    db->close(db);
+
+
+
+	
+    keys = fopen("yp.keys", "rt");
+    vals = fopen("yp.total", "rt");
+    get_key = (char *)malloc(100);
+    get_val = (char *)malloc(300);
+
+    db = dbopen("/usr/tmp/passwd.db", O_RDWR|O_BINARY, 0664, DB_HASH, &passwd);
+    if (!db)
+      fprintf(stderr, "Could not open db!\n");
+    n = 0;
+    while ((get_key = fgets(get_key, 100, keys)) != NULL) {
+	n++;
+	if (n % 1000 == 0)
+	  fprintf(stderr, "Getting #%d.\n", n);
+	key.size = strlen(get_key);
+	key.data = (void *)get_key;
+	if (db->get(db, &key, &val, 0) != 0)
+	  fprintf(stderr, "Retrieval error on %s\n", get_key);
+	fgets(get_val, 300, vals);
+	if (memcmp(val.data, (void *)get_val, val.size)) {
+	    fprintf(stderr, "Unmatched get on %s.\n", get_key);
+	    fprintf(stderr, "Input = %s\nOutput = %s\n", get_val, 
+		    (char *)val.data);
+	}
+    }
+    expected = n;
+    fclose(vals);
+    fclose(keys);
+    free(get_key);
+    free(get_val);
+    db->close(db);
+
+
+
+
+    get_key = (char *)malloc(100);
+    get_val = (char *)malloc(300);
+
+    db = dbopen("/usr/tmp/passwd.db", O_RDWR, 0664, DB_HASH, &passwd);
+    if (!db)
+      fprintf(stderr, "Could not open db!\n");
+    n = 0;
+    for (;;) {
+	n++;
+	if (n % 1000 == 0)
+	  fprintf(stderr, "Sequence getting #%d.\n", n);
+	if (db->seq(db, &key, &val, 0) != 0) {
+	    fprintf(stderr, 
+		    "Exiting sequence retrieve; n = %d, expected = %d\n",
+		    n - 1 , expected);
+	    break;
+	}
+    }
+    free(get_key);
+    free(get_val);
+    db->close(db);
+
+    get_key = (char *)malloc(100);
+    key2 = (char *)malloc(100);
+
+    keys = fopen("yp.keys", "rt");
+    vals = fopen("yp.total", "rt");
+
+    db = dbopen("/usr/tmp/passwd.db", O_RDWR|O_BINARY, 0664, DB_HASH, &passwd);
+    n = 0;
+    while ((get_key = fgets(get_key, 100, keys)) != NULL) {
+	if (n % 1000 == 0)
+	  fprintf(stderr, "Deleting #%d.\n", n);
+	n+=2;
+	key2 = fgets(get_key, 100, keys);
+	if (!key2)
+	  break;	
+	key.data = (void *)key2;
+	key.size = strlen(key2);
+	if (db->del(db, &key, 0) != 0)
+	  fprintf(stderr, "Delete error on %d", n);
+    }
+
+    db->close(db);
+    free(get_key);
+    free(key2);
+    fclose(keys);
+    fclose(vals);
+
+    get_key = (char *)malloc(100);
+    key2 = (char *)malloc(100);
+    get_val = (char *)malloc(300);
+
+    keys = fopen("yp.keys", "rt");
+    vals = fopen("yp.total", "rt");
+	
+    db = dbopen("/usr/tmp/passwd.db", O_RDWR|O_BINARY, 0664, DB_HASH, &passwd);
+    n = 0;
+    while ((get_key = fgets(get_key, 100, keys)) != NULL) {
+	n += 2;
+	if (n % 1000 == 0)
+	  fprintf(stderr, "Re-retrieving #%d.\n", n);
+	key2 = fgets(key2, 100, keys);
+	if (!key2)
+	  break;
+	key.data = (void *)get_key;	
+	key.size = strlen(get_key);
+	if (db->get(db, &key, &val, 0) != 0)	
+	  fprintf(stderr, "Retrieval after delete error on %d\n", n);
+	fgets(get_val, 300, vals);
+	if (memcmp(val.data, (void *)get_val, val.size)) {
+	    fprintf(stderr, "Unmatched get after delete on %s.\n", get_key);
+	    fprintf(stderr, "Input = %s\nOutput = %s\n", get_val, 
+		    (char *)val.data);
+	}
+	fgets(get_val, 300, vals);
+    }
+
+    db->close(db);
+    free(get_key);
+    free(key2);
+    free(get_val);
+    fclose(keys);
+    fclose(vals);
+
+    exit(0);
+}
diff --git a/src/plugins/kdb/db2/libdb2/test/hash2.tests/passwd/genpass.c b/src/plugins/kdb/db2/libdb2/test/hash2.tests/passwd/genpass.c
new file mode 100644
index 0000000000..da37676878
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/hash2.tests/passwd/genpass.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void
+main(int argc, char **argv)
+{
+	int i,j,n;
+	char *pass[8], r;
+	
+	n = atoi(argv[1]);
+
+	srandom(101173);
+	for (i = 0; i < n; i++) {
+		for (j = 0; j < 8; j++) {
+			r = random() % 122;
+			while (r < 48)
+				r += random() % (122 - r);
+			printf("%c", r);
+		}
+		printf("\n");
+	}
+}
+
diff --git a/src/plugins/kdb/db2/libdb2/test/run.test b/src/plugins/kdb/db2/libdb2/test/run.test
new file mode 100644
index 0000000000..48c3a63d0e
--- /dev/null
+++ b/src/plugins/kdb/db2/libdb2/test/run.test
@@ -0,0 +1,746 @@
+#!/bin/sh -
+#
+#	@(#)run.test	8.13 (Berkeley) 11/2/95
+#
+
+# db regression tests
+main()
+{
+
+	PROG=./dbtest
+	TMP1=${TMPDIR-.}/t1
+	TMP2=${TMPDIR-.}/t2
+	TMP3=${TMPDIR-.}/t3
+
+	if [ \! -z "$WORDLIST" -a -f "$WORDLIST" ]; then
+		DICT=$WORDLIST
+	elif [ -f /usr/local/lib/dict/words ]; then
+		DICT=/usr/local/lib/dict/words
+	elif [ -f /usr/share/dict/words ]; then
+		DICT=/usr/share/dict/words
+	elif [ -f /usr/dict/words ]; then
+		DICT=/usr/dict/words
+	elif [ -f /usr/share/lib/dict/words ]; then
+		DICT=/usr/share/lib/dict/words
+	elif [ -f $srcdir/../test/dictionary ]; then
+		DICT=`cd $srcdir/../test && pwd`/dictionary
+	else
+		echo 'run.test: no dictionary'
+		exit 1
+	fi
+	
+	dictsize=`wc -l < $DICT`
+
+	bindir=/bin/.
+
+	if [ $# -eq 0 ]; then
+		for t in 1 2 3 4 5 6 7 8 9 10 11 12 13 20; do
+			test$t
+		done
+	else
+		while [ $# -gt 0 ]
+			do case "$1" in
+			test*)
+				$1;;
+			[0-9]*)
+				test$1;;
+			btree)
+				for t in 1 2 3 7 8 9 10 12 13; do
+					test$t
+				done;;
+			hash)
+				for t in 1 2 3 8 13 20; do
+					test$t
+				done;;
+			recno)
+				for t in 1 2 3 4 5 6 7 10 11; do
+					test$t
+				done;;
+			*)
+				echo "run.test: unknown test $1"
+				echo "usage: run.test test# | type"
+				exit 1
+			esac
+			shift
+		done
+	fi
+	rm -f $TMP1 $TMP2 $TMP3
+	exit 0
+}
+
+getnwords() {
+	# Delete blank lines because the db code appears not to
+	# like empty keys.  On Debian Linux, $DICT appears to contain
+	# some non-ASCII characters, and "rev" chokes on them.
+	sed -e '/^$/d' < $DICT | cat -v | sed -e ${1}q
+}
+
+# Take the first hundred entries in the dictionary, and make them
+# be key/data pairs.
+test1()
+{
+	echo "Test 1: btree, hash: small key, small data pairs"
+	getnwords 200 > $TMP1
+	for type in btree hash; do
+		rm -f $TMP2 $TMP3
+		for i in `cat $TMP1`; do
+			echo p
+			echo k$i
+			echo d$i
+			echo g
+			echo k$i
+		done > $TMP2
+		$PROG -o $TMP3 $type $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test1: type $type: failed"
+			exit 1
+		fi
+	done
+	echo "Test 1: recno: small key, small data pairs"
+	rm -f $TMP2 $TMP3
+	awk '{ 
+		++i;
+		printf("p\nk%d\nd%s\ng\nk%d\n", i, $0, i);
+	}' < $TMP1 > $TMP2
+	$PROG -o $TMP3 recno $TMP2
+	if (cmp -s $TMP1 $TMP3) ; then :
+	else
+		echo "test1: type recno: failed"
+		exit 1
+	fi
+}
+
+# Take the first 200 entries in the dictionary, and give them
+# each a medium size data entry.
+test2()
+{
+	echo "Test 2: btree, hash: small key, medium data pairs"
+	mdata=abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
+	echo $mdata |
+	awk '{ for (i = 1; i < 201; ++i) print $0 }' > $TMP1
+	for type in hash btree; do
+		rm -f $TMP2 $TMP3
+		for i in `getnwords 200`; do
+			echo p
+			echo k$i
+			echo d$mdata
+			echo g
+			echo k$i
+		done > $TMP2
+		$PROG -o $TMP3 $type $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test2: type $type: failed"
+			exit 1
+		fi
+	done
+	echo "Test 2: recno: small key, medium data pairs"
+	rm -f $TMP2 $TMP3
+	echo $mdata | 
+	awk '{  for (i = 1; i < 201; ++i)
+		printf("p\nk%d\nd%s\ng\nk%d\n", i, $0, i);
+	}' > $TMP2
+	$PROG -o $TMP3 recno $TMP2
+	if (cmp -s $TMP1 $TMP3) ; then :
+	else
+		echo "test2: type recno: failed"
+		exit 1
+	fi
+}
+
+# Insert the programs in $bindir with their paths as their keys.
+test3()
+{
+	echo "Test 3: hash: small key, big data pairs"
+	rm -f $TMP1
+	(find $bindir -type f -exec test -r {} \; -print | xargs cat) > $TMP1
+	for type in hash; do
+		rm -f $TMP2 $TMP3
+		for i in `find $bindir -type f -exec test -r {} \; -print`; do
+			echo p
+			echo k$i
+			echo D$i
+			echo g
+			echo k$i
+		done > $TMP2
+		$PROG -o $TMP3 $type $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test3: $type: failed"
+			exit 1
+		fi
+	done
+	echo "Test 3: btree: small key, big data pairs"
+	for psize in 512 16384 65536; do
+		echo "    page size $psize"
+		for type in btree; do
+			rm -f $TMP2 $TMP3
+			for i in `find $bindir -type f -exec test -r {} \; -print`; do
+				echo p
+				echo k$i
+				echo D$i
+				echo g
+				echo k$i
+			done > $TMP2
+			$PROG -i psize=$psize -o $TMP3 $type $TMP2
+			if (cmp -s $TMP1 $TMP3) ; then :
+			else
+				echo "test3: $type: page size $psize: failed"
+				exit 1
+			fi
+		done
+	done
+	echo "Test 3: recno: big data pairs"
+	rm -f $TMP2 $TMP3
+	find $bindir -type f -exec test -r {} \; -print | 
+	awk '{
+		++i;
+		printf("p\nk%d\nD%s\ng\nk%d\n", i, $0, i);
+	}' > $TMP2
+	for psize in 512 16384 65536; do
+		echo "    page size $psize"
+		$PROG -i psize=$psize -o $TMP3 recno $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test3: recno: page size $psize: failed"
+			exit 1
+		fi
+	done
+}
+
+# Do random recno entries.
+test4()
+{
+	echo "Test 4: recno: random entries"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk '{
+		for (i = 37; i <= 37 + 88 * 17; i += 17) {
+			if (i % 41)
+				s = substr($0, 1, i % 41);
+			else
+				s = substr($0, 1);
+			printf("input key %d: %s\n", i, s);
+		}
+		for (i = 1; i <= 15; ++i) {
+			if (i % 41)
+				s = substr($0, 1, i % 41);
+			else
+				s = substr($0, 1);
+			printf("input key %d: %s\n", i, s);
+		}
+		for (i = 19234; i <= 19234 + 61 * 27; i += 27) {
+			if (i % 41)
+				s = substr($0, 1, i % 41);
+			else
+				s = substr($0, 1);
+			printf("input key %d: %s\n", i, s);
+		}
+		exit
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+	cat $TMP1 |
+	awk 'BEGIN {
+			i = 37;
+			incr = 17;
+		}
+		{
+			printf("p\nk%d\nd%s\n", i, $0);
+			if (i == 19234 + 61 * 27)
+				exit;
+			if (i == 37 + 88 * 17) {
+				i = 1;
+				incr = 1;
+			} else if (i == 15) {
+				i = 19234;
+				incr = 27;
+			} else
+				i += incr;
+		}
+		END {
+			for (i = 37; i <= 37 + 88 * 17; i += 17)
+				printf("g\nk%d\n", i);
+			for (i = 1; i <= 15; ++i)
+				printf("g\nk%d\n", i);
+			for (i = 19234; i <= 19234 + 61 * 27; i += 27)
+				printf("g\nk%d\n", i);
+		}' > $TMP2
+	$PROG -o $TMP3 recno $TMP2
+	if (cmp -s $TMP1 $TMP3) ; then :
+	else
+		echo "test4: type recno: failed"
+		exit 1
+	fi
+}
+
+# Do reverse order recno entries.
+test5()
+{
+	echo "Test 5: recno: reverse order entries"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk ' {
+		for (i = 1500; i; --i) {
+			if (i % 34)
+				s = substr($0, 1, i % 34);
+			else
+				s = substr($0, 1);
+			printf("input key %d: %s\n", i, s);
+		}
+		exit;
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+	cat $TMP1 |
+	awk 'BEGIN {
+			i = 1500;
+		}
+		{
+			printf("p\nk%d\nd%s\n", i, $0);
+			--i;
+		}
+		END {
+			for (i = 1500; i; --i) 
+				printf("g\nk%d\n", i);
+		}' > $TMP2
+	$PROG -o $TMP3 recno $TMP2
+	if (cmp -s $TMP1 $TMP3) ; then :
+	else
+		echo "test5: type recno: failed"
+		exit 1
+	fi
+}
+		
+# Do alternating order recno entries.
+test6()
+{
+	echo "Test 6: recno: alternating order entries"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk ' {
+		for (i = 1; i < 1200; i += 2) {
+			if (i % 34)
+				s = substr($0, 1, i % 34);
+			else
+				s = substr($0, 1);
+			printf("input key %d: %s\n", i, s);
+		}
+		for (i = 2; i < 1200; i += 2) {
+			if (i % 34)
+				s = substr($0, 1, i % 34);
+			else
+				s = substr($0, 1);
+			printf("input key %d: %s\n", i, s);
+		}
+		exit;
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+	cat $TMP1 |
+	awk 'BEGIN {
+			i = 1;
+			even = 0;
+		}
+		{
+			printf("p\nk%d\nd%s\n", i, $0);
+			i += 2;
+			if (i >= 1200) {
+				if (even == 1)
+					exit;
+				even = 1;
+				i = 2;
+			}
+		}
+		END {
+			for (i = 1; i < 1200; ++i) 
+				printf("g\nk%d\n", i);
+		}' > $TMP2
+	$PROG -o $TMP3 recno $TMP2
+	sort -o $TMP1 $TMP1
+	sort -o $TMP3 $TMP3
+	if (cmp -s $TMP1 $TMP3) ; then :
+	else
+		echo "test6: type recno: failed"
+		exit 1
+	fi
+}
+
+# Delete cursor record
+test7()
+{
+	echo "Test 7: btree, recno: delete cursor record"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk '{
+		for (i = 1; i <= 120; ++i)
+			printf("%05d: input key %d: %s\n", i, i, $0);
+		printf("%05d: input key %d: %s\n", 120, 120, $0);
+		printf("seq failed, no such key\n");
+		printf("%05d: input key %d: %s\n", 1, 1, $0);
+		printf("%05d: input key %d: %s\n", 2, 2, $0);
+		exit;
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+
+	for type in btree recno; do
+		cat $TMP1 |
+		awk '{
+			if (i == 120)
+				exit;
+			printf("p\nk%d\nd%s\n", ++i, $0);
+		}
+		END {
+			printf("fR_NEXT\n");
+			for (i = 1; i <= 120; ++i)
+				printf("s\n");
+			printf("fR_CURSOR\ns\nk120\n");
+			printf("r\n");
+			printf("fR_NEXT\ns\n");
+			printf("fR_CURSOR\ns\nk1\n");
+			printf("r\n");
+			printf("fR_FIRST\ns\n");
+		}' > $TMP2
+		$PROG -o $TMP3 recno $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test7: type $type: failed"
+			exit 1
+		fi
+	done
+}
+
+# Make sure that overflow pages are reused.
+test8()
+{
+	echo "Test 8: btree: repeated small key, big data pairs"
+	rm -f $TMP1
+	echo "" | 
+	awk 'BEGIN {
+		for (i = 1; i <= 10; ++i) {
+			printf("p\nkkey1\nD/bin/sh\n");
+			printf("p\nkkey2\nD/bin/csh\n");
+			if (i % 8 == 0) {
+				printf("c\nkkey2\nD/bin/csh\n");
+				printf("c\nkkey1\nD/bin/sh\n");
+				printf("e\t%d of 10 (comparison)\n", i);
+			} else
+				printf("e\t%d of 10             \n", i);
+			printf("r\nkkey1\nr\nkkey2\n");
+		}
+	}' > $TMP1
+	if $PROG btree $TMP1 ; then
+	    true
+	else
+	    echo "test8: btree tests failed"
+	    exit 1
+	fi
+#	$PROG hash $TMP1
+	# No explicit test for success.
+}
+
+# Test btree duplicate keys
+test9()
+{
+	echo "Test 9: btree: duplicate keys"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk '{
+		for (i = 1; i <= 543; ++i)
+			printf("%05d: input key %d: %s\n", i, i, $0);
+		exit;
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+
+	for type in btree; do
+		cat $TMP1 | 
+		awk '{
+			if (i++ % 2)
+				printf("p\nkduplicatekey\nd%s\n", $0);
+			else
+				printf("p\nkunique%dkey\nd%s\n", i, $0);
+		}
+		END {
+				printf("o\n");
+		}' > $TMP2
+		$PROG -iflags=1 -o $TMP3 $type $TMP2
+		sort -o $TMP3 $TMP3
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test9: type $type: failed"
+			exit 1
+		fi
+	done
+}
+
+# Test use of cursor flags without initialization
+test10()
+{
+	echo "Test 10: btree, recno: test cursor flag use"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk '{
+		for (i = 1; i <= 20; ++i)
+			printf("%05d: input key %d: %s\n", i, i, $0);
+		exit;
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+
+	# Test that R_CURSOR doesn't succeed before cursor initialized
+	for type in btree recno; do
+		cat $TMP1 |
+		awk '{
+			if (i == 10)
+				exit;
+			printf("p\nk%d\nd%s\n", ++i, $0);
+		}
+		END {
+			printf("fR_CURSOR\nr\n");
+			printf("eR_CURSOR SHOULD HAVE FAILED\n");
+		}' > $TMP2
+		$PROG -o $TMP3 $type $TMP2 > /dev/null 2>&1
+		if [ -s $TMP3 ] ; then
+			echo "Test 10: delete: R_CURSOR SHOULD HAVE FAILED"
+			exit 1
+		fi
+	done
+	for type in btree recno; do
+		cat $TMP1 |
+		awk '{
+			if (i == 10)
+				exit;
+			printf("p\nk%d\nd%s\n", ++i, $0);
+		}
+		END {
+			printf("fR_CURSOR\np\nk1\ndsome data\n");
+			printf("eR_CURSOR SHOULD HAVE FAILED\n");
+		}' > $TMP2
+		$PROG -o $TMP3 $type $TMP2 > /dev/null 2>&1
+		if [ -s $TMP3 ] ; then
+			echo "Test 10: put: R_CURSOR SHOULD HAVE FAILED"
+			exit 1
+		fi
+	done
+}
+
+# Test insert in reverse order.
+test11()
+{
+	echo "Test 11: recno: reverse order insert"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk '{
+		for (i = 1; i <= 779; ++i)
+			printf("%05d: input key %d: %s\n", i, i, $0);
+		exit;
+	}' > $TMP1
+	rm -f $TMP2 $TMP3
+
+	for type in recno; do
+		cat $TMP1 |
+		awk '{
+			if (i == 0) {
+				i = 1;
+				printf("p\nk1\nd%s\n", $0);
+				printf("%s\n", "fR_IBEFORE");
+			} else
+				printf("p\nk1\nd%s\n", $0);
+		}
+		END {
+				printf("or\n");
+		}' > $TMP2
+		$PROG -o $TMP3 $type $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test11: type $type: failed"
+			exit 1
+		fi
+	done
+}
+
+# Take the first 20000 entries in the dictionary, reverse them, and give
+# them each a small size data entry.  Use a small page size to make sure
+# the btree split code gets hammered.
+test12()
+{
+	if ( rev < /dev/null ) > /dev/null 2>&1 ; then
+		:
+	else
+		echo "Test 12: skipped, rev not found"
+		return
+	fi
+	if test $dictsize -lt 20001 ; then
+		echo "Test 12: skipped, dictionary too small"
+		return
+	else
+		:
+	fi
+	echo "Test 12: btree: lots of keys, small page size"
+	mdata=abcdefghijklmnopqrstuvwxy
+	echo $mdata |
+	awk '{ for (i = 1; i < 20001; ++i) print $0 }' > $TMP1
+	for type in btree; do
+		rm -f $TMP2 $TMP3
+		for i in `getnwords 20000 | rev`; do
+			echo p
+			echo k$i
+			echo d$mdata
+			echo g
+			echo k$i
+		done > $TMP2
+		$PROG -i psize=512 -o $TMP3 $type $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test12: type $type: failed"
+			exit 1
+		fi
+	done
+}
+
+# Test different byte orders.
+test13()
+{
+	echo "Test 13: btree, hash: differing byte orders"
+	getnwords 50 > $TMP1
+	for order in 1234 4321; do
+		for type in btree hash; do
+			rm -f byte.file $TMP2 $TMP3
+			for i in `cat $TMP1`; do
+				echo p
+				echo k$i
+				echo d$i
+				echo g
+				echo k$i
+			done > $TMP2
+			$PROG -ilorder=$order -f byte.file -o $TMP3 $type $TMP2
+			if (cmp -s $TMP1 $TMP3) ; then :
+			else
+				echo "test13: $type/$order put failed"
+				exit 1
+			fi
+			for i in `cat $TMP1`; do
+				echo g
+				echo k$i
+			done > $TMP2
+			$PROG -s \
+			    -ilorder=$order -f byte.file -o $TMP3 $type $TMP2
+			if (cmp -s $TMP1 $TMP3) ; then :
+			else
+				echo "test13: $type/$order get failed"
+				exit 1
+			fi
+		done
+	done
+	rm -f byte.file
+}
+
+# Try a variety of bucketsizes and fill factors for hashing
+test20()
+{
+	if test $dictsize -lt 10001 ; then
+		echo "Test 20: skipped, dictionary too small"
+		return
+	else
+		:
+	fi
+	echo\
+    "Test 20: hash: bucketsize, fill factor; nelem 25000 cachesize 65536"
+	echo "abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg" |
+	awk '{
+		for (i = 1; i <= 10000; ++i) {
+			if (i % 34)
+				s = substr($0, 1, i % 34);
+			else
+				s = substr($0, 1);
+			printf("%s\n", s);
+		}
+		exit;
+	}' > $TMP1
+	getnwords 10000 |
+	awk 'BEGIN {
+		ds="abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg"
+	}
+	{
+		if (++i % 34)
+			s = substr(ds, 1, i % 34);
+		else
+			s = substr(ds, 1);
+		printf("p\nk%s\nd%s\n", $0, s);
+	}' > $TMP2
+	getnwords 10000 |
+	awk '{
+		++i;
+		printf("g\nk%s\n", $0);
+	}' >> $TMP2
+	bsize=256
+	for ffactor in 11 14 21; do
+		echo "    bucketsize $bsize, fill factor $ffactor"
+		$PROG -o$TMP3 \
+		    -ibsize=$bsize,ffactor=$ffactor,nelem=25000,cachesize=65536\
+		    hash $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test20: type hash:\
+bsize=$bsize ffactor=$ffactor nelem=25000 cachesize=65536 failed"
+			exit 1
+		fi
+	done
+	bsize=512
+	for ffactor in 21 28 43; do
+		echo "    bucketsize $bsize, fill factor $ffactor"
+		$PROG -o$TMP3 \
+		    -ibsize=$bsize,ffactor=$ffactor,nelem=25000,cachesize=65536\
+		    hash $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test20: type hash:\
+bsize=$bsize ffactor=$ffactor nelem=25000 cachesize=65536 failed"
+			exit 1
+		fi
+	done
+	bsize=1024
+	for ffactor in 43 57 85; do
+		echo "    bucketsize $bsize, fill factor $ffactor"
+		$PROG -o$TMP3 \
+		    -ibsize=$bsize,ffactor=$ffactor,nelem=25000,cachesize=65536\
+		    hash $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test20: type hash:\
+bsize=$bsize ffactor=$ffactor nelem=25000 cachesize=65536 failed"
+			exit 1
+		fi
+	done
+	bsize=2048
+	for ffactor in 85 114 171; do
+		echo "    bucketsize $bsize, fill factor $ffactor"
+		$PROG -o$TMP3 \
+		    -ibsize=$bsize,ffactor=$ffactor,nelem=25000,cachesize=65536\
+		    hash $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test20: type hash:\
+bsize=$bsize ffactor=$ffactor nelem=25000 cachesize=65536 failed"
+			exit 1
+		fi
+	done
+	bsize=4096
+	for ffactor in 171 228 341; do
+		echo "    bucketsize $bsize, fill factor $ffactor"
+		$PROG -o$TMP3 \
+		    -ibsize=$bsize,ffactor=$ffactor,nelem=25000,cachesize=65536\
+		    hash $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test20: type hash:\
+bsize=$bsize ffactor=$ffactor nelem=25000 cachesize=65536 failed"
+			exit 1
+		fi
+	done
+	bsize=8192
+	for ffactor in 341 455 683; do
+		echo "    bucketsize $bsize, fill factor $ffactor"
+		$PROG -o$TMP3 \
+		    -ibsize=$bsize,ffactor=$ffactor,nelem=25000,cachesize=65536\
+		    hash $TMP2
+		if (cmp -s $TMP1 $TMP3) ; then :
+		else
+			echo "test20: type hash:\
+bsize=$bsize ffactor=$ffactor nelem=25000 cachesize=65536 failed"
+			exit 1
+		fi
+	done
+}
+
+main $*
diff --git a/src/plugins/kdb/db2/pol_xdr.c b/src/plugins/kdb/db2/pol_xdr.c
new file mode 100644
index 0000000000..37761080a8
--- /dev/null
+++ b/src/plugins/kdb/db2/pol_xdr.c
@@ -0,0 +1,88 @@
+#include <sys/types.h>
+#include <krb5.h>
+#include <gssrpc/rpc.h>
+#include <krb5/kdb.h>
+#include "policy_db.h"
+#ifdef HAVE_MEMORY_H
+#include <memory.h>
+#endif
+
+bool_t xdr_nullstring(XDR *xdrs, char **objp)
+{
+     u_int size;
+                                                                                                                            
+     if (xdrs->x_op == XDR_ENCODE) {
+          if (*objp == NULL)
+               size = 0;
+          else
+               size = strlen(*objp) + 1;
+     }
+     if (! xdr_u_int(xdrs, &size)) {
+          return FALSE;
+        }
+     switch (xdrs->x_op) {
+     case XDR_DECODE:
+          if (size == 0) {
+               *objp = NULL;
+               return TRUE;
+          } else if (*objp == NULL) {
+               *objp = (char *) mem_alloc(size);
+               if (*objp == NULL) {
+                    errno = ENOMEM;
+                    return FALSE;
+               }
+          }
+          return (xdr_opaque(xdrs, *objp, size));
+                                                                                                                            
+     case XDR_ENCODE:
+          if (size != 0)
+               return (xdr_opaque(xdrs, *objp, size));
+          return TRUE;
+                                                                                                                            
+     case XDR_FREE:
+          if (*objp != NULL)
+               mem_free(*objp, size);
+          *objp = NULL;
+          return TRUE;
+     }
+                                                                                                                            
+     return FALSE;
+}
+                                                                                                                            
+
+
+bool_t
+xdr_osa_policy_ent_rec(XDR *xdrs, osa_policy_ent_t objp)
+{
+    switch (xdrs->x_op) {
+    case XDR_ENCODE:
+	 objp->version = OSA_ADB_POLICY_VERSION_1;
+	 /* fall through */
+    case XDR_FREE:
+	 if (!xdr_int(xdrs, &objp->version))
+	      return FALSE;
+	 break;
+    case XDR_DECODE:
+	 if (!xdr_int(xdrs, &objp->version))
+	      return FALSE;
+	 if (objp->version != OSA_ADB_POLICY_VERSION_1)
+	      return FALSE;
+	 break;
+    }
+    
+    if(!xdr_nullstring(xdrs, &objp->name))
+	return (FALSE);
+    if (!xdr_u_int32(xdrs, &objp->pw_min_life))
+	return (FALSE);
+    if (!xdr_u_int32(xdrs, &objp->pw_max_life))
+	return (FALSE);
+    if (!xdr_u_int32(xdrs, &objp->pw_min_length))
+	return (FALSE);
+    if (!xdr_u_int32(xdrs, &objp->pw_min_classes))
+	return (FALSE);
+    if (!xdr_u_int32(xdrs, &objp->pw_history_num))
+	return (FALSE);
+    if (!xdr_u_int32(xdrs, &objp->policy_refcnt))
+	return (FALSE);
+    return (TRUE);
+}
diff --git a/src/plugins/kdb/db2/policy_db.h b/src/plugins/kdb/db2/policy_db.h
new file mode 100644
index 0000000000..8bbef800b5
--- /dev/null
+++ b/src/plugins/kdb/db2/policy_db.h
@@ -0,0 +1,101 @@
+/*
+ * Data Types for policy and principal information that
+ * exists in the respective databases.
+ *
+ * $Header$
+ *
+ * This file was originally created with rpcgen.
+ * It has been hacked up since then.
+ */
+
+#ifndef __ADB_H__
+#define __ADB_H__
+#include <sys/types.h>
+#include <errno.h>
+#include <krb5.h>
+#include <krb5/kdb.h>
+/* Okay, this is a bit obscure.  The libdb2 configure script doesn't
+   detect it, but on Tru64 5.1, netinet/in.h causes sys/bittypes.h to
+   be included, and that has a typedef for u_int32_t.  Because the
+   configure script doesn't detect it, it causes db-config.h to have a
+   #define for u_int32_t, so including db.h and then netinet/in.h
+   causes compilation to fail.
+
+   Since gssrpc/types.h includes netinet/in.h, including that first
+   will cause the typedef to be seen before the macro definition,
+   which still isn't quite right, but is close enough for now.
+
+   A better fix might be for db.h to include netinet/in.h if that's
+   where we find u_int32_t.  */
+#include <gssrpc/types.h>
+#include <gssrpc/xdr.h>
+#include <db.h>
+#include "adb_err.h"
+#include <com_err.h>
+
+typedef	long		osa_adb_ret_t;
+
+#define OSA_ADB_POLICY_DB_MAGIC	0x12345A00
+
+#define OSA_ADB_POLICY_VERSION_MASK	0x12345D00
+#define OSA_ADB_POLICY_VERSION_1	0x12345D01
+
+
+
+typedef struct _osa_adb_db_lock_ent_t {
+     FILE     *lockfile;
+     char     *filename;
+     int      refcnt, lockmode, lockcnt;
+     krb5_context context;
+} osa_adb_lock_ent, *osa_adb_lock_t;
+
+typedef struct _osa_adb_db_ent_t {
+     int        magic;
+     DB         *db;
+     HASHINFO   info;
+     BTREEINFO  btinfo;
+     char       *filename;
+     osa_adb_lock_t lock;
+     int        opencnt;
+} osa_adb_db_ent, *osa_adb_db_t, *osa_adb_princ_t, *osa_adb_policy_t;
+
+/*
+ * Return Code (the rest are in adb_err.h)
+ */
+ 
+#define OSA_ADB_OK		0
+
+/*
+ * Functions
+ */
+
+krb5_error_code	osa_adb_create_db(char *filename, char *lockfile, int magic);
+krb5_error_code	osa_adb_destroy_db(char *filename, char *lockfile, int magic);
+krb5_error_code   osa_adb_rename_db(char *filefrom, char *lockfrom,
+				  char *fileto, char *lockto, int magic);
+krb5_error_code	osa_adb_init_db(osa_adb_db_t *dbp, char *filename,
+				char *lockfile, int magic);
+krb5_error_code	osa_adb_fini_db(osa_adb_db_t db, int magic);
+krb5_error_code	osa_adb_get_lock(osa_adb_db_t db, int mode);
+krb5_error_code	osa_adb_release_lock(osa_adb_db_t db);
+krb5_error_code osa_adb_open_and_lock(osa_adb_princ_t db, int locktype);
+krb5_error_code osa_adb_close_and_unlock(osa_adb_princ_t db);
+krb5_error_code	osa_adb_close_policy(osa_adb_policy_t db);
+krb5_error_code	osa_adb_create_policy(osa_adb_policy_t db,
+				      osa_policy_ent_t entry);
+krb5_error_code	osa_adb_destroy_policy(osa_adb_policy_t db,
+				       char * name);
+krb5_error_code	osa_adb_get_policy(osa_adb_policy_t db,
+				   char * name,
+				   osa_policy_ent_t *entry,
+				   int *cnt);
+krb5_error_code	osa_adb_put_policy(osa_adb_policy_t db,
+				   osa_policy_ent_t entry);
+krb5_error_code	osa_adb_iter_policy(osa_adb_policy_t db,
+				    osa_adb_iter_policy_func func,
+				    void * data);
+void		osa_free_policy_ent(osa_policy_ent_t val);
+
+bool_t  xdr_osa_policy_ent_rec(XDR *xdrs, osa_policy_ent_t objp);
+
+#endif /* __ADB_H__ */