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Re: PostgreSQL clustering (shared disk)

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"Mikko Partio" <mpartio@xxxxxxxxx> writes:
> This was my original intention. I'm still quite hesitant to trust the
> fencing devices ability to quarantee that only one postmaster at a time is
> running, because of the disastrous possibility of corrupting the whole
> database.

Making that guarantee is a fencing device's only excuse for existence.
So I think you should trust that a properly-implemented fence will do
what it's claimed to do.

On the other side of the coin, I have little confidence in DRBD
providing the storage semantics we need (in particular guaranteeing
write ordering).  So that path doesn't sound exactly risk-free either.

			regards, tom lane

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TIP 5: don't forget to increase your free space map settings

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