Devrim GÜNDÜZ <devrim@CommandPrompt.com> writes:
>> What I'm pondering here is that is the cluster able to keep the
>> postmasters synchronized at all times so that the database won't get
>> corrupted.
>
> Keep all the $PGDATA in the shared disk. That would minimize data loss
> (Of course, there is still a risk of data loss -- the postmasters are
> not aware of each other and they don't share each other's buffers, etc.)
It would be much better to have the cluster software only run one
postmaster at a time, starting up the secondary if the primary fails.
That's the usual practice with shared storage.
-Doug