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Re: Clusters

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Sean Chittenden <sean(at)chittenden(dot)org>
Cc: Andrew Sullivan <andrew(at)libertyrms(dot)info>,pgsql-performance(at)postgresql(dot)org
Subject: Re: Clusters
Date: 2002-10-29 13:43:38
Message-ID: 21026.1035899018@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-performance
Sean Chittenden <sean(at)chittenden(dot)org> writes:
> together behind an SLB? Assume that all systems have a qlogic
> card, and are attached to a SAN, and that the SAN holds the
> data. Can PostgreSQL be configured to read from the SAN? Does each
> system have to initialize the DB?
>> 
>> You can't do this safely.  PostgreSQL wants to control its disk.
>> Someone has said on the (?) -general list that he has modified the
>> PostgreSQL code to do this, but it makes me nervous.

> Didn't Tom say that it was possible if you had different WAL logs for
> each instance?

I said no such thing.  I said it will not work, period.

			regards, tom lane

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