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Diffstat (limited to 'ctdb/doc/ctdbd.1')
| -rw-r--r-- | ctdb/doc/ctdbd.1 | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/ctdb/doc/ctdbd.1 b/ctdb/doc/ctdbd.1 index 52c33931104..33ceb04a6cc 100644 --- a/ctdb/doc/ctdbd.1 +++ b/ctdb/doc/ctdbd.1 @@ -2,12 +2,12 @@ .\" Title: ctdbd .\" Author: [FIXME: author] [see http://docbook.sf.net/el/author] .\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/> -.\" Date: 10/11/2012 +.\" Date: 10/20/2012 .\" Manual: CTDB - clustered TDB database .\" Source: ctdb .\" Language: English .\" -.TH "CTDBD" "1" "10/11/2012" "ctdb" "CTDB \- clustered TDB database" +.TH "CTDBD" "1" "10/20/2012" "ctdb" "CTDB \- clustered TDB database" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- @@ -593,6 +593,13 @@ When many clients across many nodes try to access the same record at the same ti This parameter is used to activate a fetch\-collapse\&. A fetch\-collapse is when we track which records we have requests in flight so that we only keep one request in flight from a certain node, even if multiple smbd processes are attemtping to fetch the record at the same time\&. This can improve performance and reduce CPU utilization for certain workloads\&. .PP This timeout controls if we should collapse multiple fetch operations of the same record into a single request and defer all duplicates or not\&. +.SS "DeadlockTimeout" +.PP +Default: 60 +.PP +Number of seconds to determine if ctdb is in deadlock with samba\&. +.PP +When ctdb daemon is blocked waiting for a lock on a database which is blocked by some other process, ctdb logs a warning every 10 seconds\&. Most often this is caused by samba locking databases and waiting on ctdb and result in a deadlock\&. If the lock is not obtained by ctdb before deadlock timeout expires, ctdb will detect it as a deadlock and terminate the blocking samba process\&. Setting this value to 0 disables deadlock detection\&. .SH "LVS" .PP LVS is a mode where CTDB presents one single IP address for the entire cluster\&. This is an alternative to using public IP addresses and round\-robin DNS to loadbalance clients across the cluster\&. |