[Ocfs2-users] Catatonic nodes under SLES10

[Alexei_Roudnev]

There is not any reason to fence to prevent futrure activity if system have
not any current activity,
except if system have embedded failure (run out of resources etc).

What happen when you fence:
- system reboot
- o2cb starts
- ocfsv2 is maintained from the scratch.

So, no one prevents suspoending any FS activity and reinstate cluster
without reboot - results will be exactly the same in 99% cases.
(Of course, it should be configurable - sometimes we want to reboot in such
cases).

Moreover, if ALL Nodes lost disk conenction, it dont make any sense to fence
anynode until at least 1 node got connectiuon to the disk back.

----- Original Message ----- 
From: "Eckenfels. Bernd" <B.Eckenfels at seeburger.de>
To: <ocfs2-users at oss.oracle.com>
Sent: Tuesday, April 10, 2007 10:06 AM
Subject: RE: [Ocfs2-users] Catatonic nodes under SLES10


Hello,

> It's not at all about what your past activitiy was like. We fence to
prevent future activity.

There is a lot you can do instead, including SCSI plugging the device o
just setting a RO flag in the filesystem (remount-ro-on-error style).
There might be times when it is needed to shoot the node in the head,
but those are not handled by the self-panic anyway...

Gruss
Bernd


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