I was wondering if anyone can give a plain answer if fencing is really needed in case there are no shared resources being used (as far as I define shared resource).
We want to use PAF or other Postgres (with replicated data files on the local drives) failover agent together with Corosync, Pacemaker and virtual IP resource and I am wondering if there is a need for fencing (which is very close bind to an infrastructure) if a Pacemaker is already controlling resources state. I know that in failover case there might be a need to add functionality to recover master that entered dirty shutdown state (eg. in case of power outage), but I can't see any case where fencing is really necessary. Am I wrong? I was looking for a strict answer but I couldn't find one... Regards, Maciej
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