Re: DRBD and Postgres: how to improve the perfomance?

"Joshua D. Drake" <jd@commandprompt.com> writes:
> Gregory Stark wrote:
>> "Simon Riggs" <simon@2ndquadrant.com> writes:
>>> You're right, but the distinction is a small one. What are the chances
>>> of losing two independent servers within a few milliseconds of each
>>> other?
>>
>> If they're on the same power bus?

> That chance is minuscule or at least should be.

It seems a bit silly to be doing replication to a slave server that has
any common point of failure with the master.

However, it seems like the point here is not so much "can you recover
your data" as what a commit means.  Do you want a commit reported to the
client to mean the data is safely down to disk in both places, or only
one?

            regards, tom lane