[Ocfs2-users] Unstable Cluster

[Werner Flamme]

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Tony Rios [09.12.2011 09:38]:
> To add to my previous message,
> 
> After some time waiting, I try to bring the mount point up again, I
> get these messages, appearing like it is going to work.....
> 
> [  127.520176] (mount.ocfs2,1388,0):dlm_join_domain:1857 Timed out
> joining dlm domain A3AA504BE42E4D3D8A15248D8FCD49BB after 94000
> msecs [  127.543603] ocfs2: Unmounting device (8,32) on (node 0) [
> 127.780023] o2net: no longer connected to node pedge38 (num 4) at
> 10.88.0.38:7777 [  745.068033] o2dlm: Nodes in domain
> A3AA504BE42E4D3D8A15248D8FCD49BB: 1 [  745.119791] ocfs2: Mounting
> device (8,32) on (node 1, slot 1) with ordered data mode. [
> 745.141503] (ocfs2rec,2060,0):ocfs2_replay_journal:1601 Recovering
> node 3 from slot 0 on device (8,32) [  757.582921] o2net: accepted
> connection from node pedge38 (num 4) at 10.88.0.38:7777 [
> 758.424804] o2net: accepted connection from node pedge36 (num 3) at
> 10.88.0.36:7777
> 
> 
> Then I issue a df -k to see the magic, it locks up, I wait, and
> eventually there is a kernel panic.
> 
> Of course none of this is actually sending over netconsole to the
> remote logging server.
> 
> Tony

Hi Tony,

since it is a timeout: what values have you configured? We had
timeouts when the load went up on the boxes, resulting in occasional
reboots every now and then. Plus, iSCSI data must pass over the same
net, what might lead to line congestion.

My values are:
O2CB_HEARTBEAT_THRESHOLD=61
O2CB_IDLE_TIMEOUT_MS=60000
O2CB_KEEPALIVE_DELAY_MS=10000
O2CB_RECONNECT_DELAY_MS=10000

And since we use these settings, there was no OCFS2 timeout. Yet...

Oh, and we use SLES 11 SP 1 inside ESXi VMs, with Raw Disk access to
the RAID.

HTH
Werner
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