[Ocfs2-users] Fencing options

[Sunil Mushran]

Do you have netconsole output? We have to determine the
reason for the fencing before we can recommend any changes.

Angelo McComis wrote:
> Some more about my setup, which started the discussion...
>
> Version info, mount options, etc. are herein.
>
> If there are recommended changes to this, I'm open to suggestions
> here. This is mostly an "out of the box" configuration.
>
> We are not running Oracle DB, just using this for a shared place for
> transaction files between application servers doing parallel
> processing.
>
> So - Do we want the mount "datavolume, noatime" added to just _netdev
> and heartbeat=local?  Will that help or hurt?  Also, do we want to
> turn up the number of HEARTBEAT_THRESHOLD?
>
>
>
> BEERGOGGLES1:~# modinfo ocfs2
> filename:       /lib/modules/2.6.16.60-0.42.5-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:       2.6.16.60-0.42.5-smp SMP gcc-4.1
>
> BEERGOGGLES1:~# modinfo ocfs2_dlm
> filename:
> /lib/modules/2.6.16.60-0.42.5-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:     FDB660B2EB59EF106C6305F
> depends:        ocfs2_nodemanager
> supported:      yes
> vermagic:       2.6.16.60-0.42.5-smp SMP gcc-4.1
> parm:           dlm_purge_interval_ms:int
> parm:           dlm_purge_locks_max:int
>
> BEERGOGGLES1:~# modinfo jbd
> filename:       /lib/modules/2.6.16.60-0.42.5-smp/kernel/fs/jbd/jbd.ko
> license:        GPL
> srcversion:     DCCDE02902B83F98EF81090
> depends:
> supported:      yes
> vermagic:       2.6.16.60-0.42.5-smp SMP gcc-4.1
>
> BEERGOGGLES1:~# modinfo ocfs2_nodemanager
> filename:
> /lib/modules/2.6.16.60-0.42.5-smp/kernel/fs/ocfs2/cluster/ocfs2_nodemanager.ko
> license:        GPL
> author:         Oracle
> license:        GPL
> author:         Oracle
> version:        1.4.1-1-SLES
> description:    OCFS2 Node Manager 1.4.1-1-SLES Wed Jul 23 18:33:42
> UTC 2008 (build f922955d99ef972235bd0c1fc236c5ddbb368611)
> srcversion:     B87371708A8B5E1828E14CD
> depends:        configfs
> supported:      yes
> vermagic:       2.6.16.60-0.42.5-smp SMP gcc-4.1
>
> BEERGOGGLES1:~# /etc/init.d/o2cb status
> Module "configfs": Loaded
> Filesystem "configfs": Mounted
> Module "ocfs2_nodemanager": Loaded
> Module "ocfs2_dlm": Loaded
> Module "ocfs2_dlmfs": Loaded
> Filesystem "ocfs2_dlmfs": Mounted
> Checking O2CB cluster ocfs2: Online
> Heartbeat dead threshold = 31
>   Network idle timeout: 30000
>   Network keepalive delay: 2000
>   Network reconnect delay: 2000
> Checking O2CB heartbeat: Active
>
> BEERGOGGLES1:~# mount | grep ocfs2
> ocfs2_dlmfs on /dlm type ocfs2_dlmfs (rw)
> /dev/evms/prod_app on /opt/VendorApsp/sharedapp type ocfs2
> (rw,_netdev,heartbeat=local)
>
> BEERGOGGLES1:~# cat /etc/sysconfig/o2cb
> #
> # This is a configuration file for automatic startup of the O2CB
> # driver.  It is generated by running /etc/init.d/o2cb configure.
> # On Debian based systems the preferred method is running
> # 'dpkg-reconfigure ocfs2-tools'.
> #
>
> # O2CB_ENABLED: 'true' means to load the driver on boot.
> O2CB_ENABLED=true
>
> # O2CB_BOOTCLUSTER: If not empty, the name of a cluster to start.
> O2CB_BOOTCLUSTER=ocfs2
>
> # O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead.
> O2CB_HEARTBEAT_THRESHOLD=
>
> # O2CB_IDLE_TIMEOUT_MS: Time in ms before a network connection is
> considered dead.
> O2CB_IDLE_TIMEOUT_MS=
>
> # O2CB_KEEPALIVE_DELAY_MS: Max time in ms before a keepalive packet is sent
> O2CB_KEEPALIVE_DELAY_MS=
>
> # O2CB_RECONNECT_DELAY_MS: Min time in ms between connection attempts
> O2CB_RECONNECT_DELAY_MS=
>
> # O2CB_HEARTBEAT_MODE: Whether to use the native "kernel" or the "user"
> # driven heartbeat (for example, for integration with heartbeat 2.0.x)
> O2CB_HEARTBEAT_MODE="kernel"
>
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