glusterfs.git/libglusterfs/src/tier-ctr-interface.h, branch v3.12.5 GlusterFS is a distributed file-system capable of scaling to several petabytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. cluster/tier: handle fast demotions 2016-10-19T19:51:48+00:00 Milind Changire mchangir@redhat.com 2016-10-15T05:19:19+00:00 460016428cf27484c333227f534c2e2f73a37fb1 Demote files on priority if hi-watermark has been breached and continue to demote until the watermark drops below hi-watermark. Monitor watermark more frequently. Trigger demotion as soon as hi-watermark is breached. Add cluster.tier-emergency-demote-query-limit option to limit number of files returned from the database query for every iteration of tier_migrate_using_query_file(). If watermark hasn't dropped below hi-watermark during the first iteration, the next iteration will be triggered approximately 1 second after tier_demote() returns to the main tiering loop. Update changetimerecorder xlator to handle query for emergency demote mode. Add tier-ctr-interface.h: Move tier and ctr interface specific macros and struct definition from libglusterfs/src/gfdb/gfdb_data_store.h to new header libglusterfs/src/tier-ctr-interface.h Change-Id: If56af78c6c81d37529b9b6e65ae606ba5c99a811 BUG: 1366648 Signed-off-by: Milind Changire <mchangir@redhat.com> Reviewed-on: http://review.gluster.org/15158 Smoke: Gluster Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Dan Lambright <dlambrig@redhat.com> 
Demote files on priority if hi-watermark has been breached and continue
to demote until the watermark drops below hi-watermark.

Monitor watermark more frequently.
Trigger demotion as soon as hi-watermark is breached.
Add cluster.tier-emergency-demote-query-limit option to limit number
of files returned from the database query for every iteration of
tier_migrate_using_query_file(). If watermark hasn't dropped below
hi-watermark during the first iteration, the next iteration will be
triggered approximately 1 second after tier_demote() returns to the
main tiering loop.
Update changetimerecorder xlator to handle query for emergency demote
mode.

Add tier-ctr-interface.h:
Move tier and ctr interface specific macros and struct definition from
libglusterfs/src/gfdb/gfdb_data_store.h to new header
libglusterfs/src/tier-ctr-interface.h

Change-Id: If56af78c6c81d37529b9b6e65ae606ba5c99a811
BUG: 1366648
Signed-off-by: Milind Changire <mchangir@redhat.com>
Reviewed-on: http://review.gluster.org/15158
Smoke: Gluster Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>