[Pacemaker] again trouble with quorum (now with cman)

[Lars Marowsky-Bree]

On 2013-07-12T14:18:03, Digimer <lists at alteeve.ca> wrote:

> In any case, if a split-brain is not a concern, then why use an HA stack at
> all?

That is not the same. DRBD behaves differently from "normal" shared
storage, and can recover from concurrent activation differently; either
automatically or by manually merging the data. That does not mean that's
desirable to have them both active all the time.

And the likelihood of one node being down when it's entirely unreachable
is actually quite high.

They can deploy a null fencing mechanism in this case though which
satisfies the cman need, I guess.

Regards,
    Lars

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