[Ocfs2-users] Slow umounts on SLES10 patchlevel 3 ocfs2

[Marc Grimme]

Hi,
we are using a SLES10 Patchlevel 3 with 12 Nodes hosting tomcat application servers.
The cluster was running some time (about 200 days) without problems.

Recently we needed to shutdown the cluster for maintenance and experianced very long times for the umount of the filesystem. It took something like 45 minutes each node and filesystem (12 x 45 minutes shutdown time).
As a result the planned downtime had to be extended ;-) .

Is there any tuning option or the like to make those umounts faster or is this something we have to live with?

Thanks for your help.
If you need more information let me know.

Marc.

Some info on the configuration:
---------------------------X8-----------------------------------
# /sbin/modinfo ocfs2
filename:       /lib/modules/2.6.16.60-0.54.5-smp/kernel/fs/ocfs2/ocfs2.ko
license:        GPL
author:         Oracle
version:        1.4.1-1-SLES
description:    OCFS2 1.4.1-1-SLES Wed Jul 23 18:33:42 UTC 2008 (build f922955d99ef972235bd0c1fc236c5ddbb368611)
srcversion:     986DD1EE4F5ABD8A44FF925
depends:        ocfs2_dlm,jbd,ocfs2_nodemanager
supported:      yes
vermagic:       2.6.16.60-0.54.5-smp SMP gcc-4.1
atix at CAS12:~> /sbin/modinfo ocfs2_dlm
filename:       /lib/modules/2.6.16.60-0.54.5-smp/kernel/fs/ocfs2/dlm/ocfs2_dlm.ko
license:        GPL
author:         Oracle
version:        1.4.1-1-SLES
description:    OCFS2 DLM 1.4.1-1-SLES Wed Jul 23 18:33:42 UTC 2008 (build f922955d99ef972235bd0c1fc236c5ddbb368611)
srcversion:     16FE87920EA41CA613E6609
depends:        ocfs2_nodemanager
supported:      yes
vermagic:       2.6.16.60-0.54.5-smp SMP gcc-4.1
parm:           dlm_purge_interval_ms:int
parm:           dlm_purge_locks_max:int
# rpm -qa ocfs2*
ocfs2-tools-1.4.0-0.9.9
ocfs2console-1.4.0-0.9.9
---------------------------X8-----------------------------------
The kernel version is 2.6.16.60-0.54.5-smp

______________________________________________________________________________

Marc Grimme

E-Mail: grimme at atix.de

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