[Linux-HA] watchdog impl

[Lars Marowsky-Bree]

On 2005-08-16T15:07:05, Alan Robertson <alanr at unix.sh> wrote:

> The watchdog will protect against most failures in the heartbeat
> software, and against many kinds of failures in the operating system.
> 
> But, it does not replace, and is not intended to replace a STONITH
> device.

Well, in case of quorate clusters, it is a viable alternative.

If your cluster software is "reliable enough" that you can trust it that
it will commit suicide (halt) within a small delta-t after loss of
quorum, the quorate partition can continue after delta-t + margin and
assume that the other nodes not present have fenced themselves.

One day I'd like this feature to be implemented too, because it seems
useful in a number of scenarios.

(This is a tangent to this discussion, but I just remembered it and
wanted to throw it out. Happens when I get enough sleep ;-)


Sincerely,
    Lars Marowsky-Brée <lmb at suse.de>

-- 
High Availability & Clustering
SUSE Labs, Research and Development
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