From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Chris Miles <chris_pg002(at)psychofx(dot)com> |
Cc: | pgsql-admin(at)postgresql(dot)org |
Subject: | Re: Multiple backends on a single physical database |
Date: | 2002-10-12 15:11:53 |
Message-ID: | 200210121511.g9CFBs619940@candle.pha.pa.us |
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Lists: | pgsql-admin |
Chris Miles wrote:
> On Thu, Oct 10, 2002 at 10:09:55AM -0400, Bruce Momjian wrote:
> > We also don't recommend NFS directories because the NFS file behavior is
> > not 100% the same as a local file system.
>
> Can you comment on what the incompatabities are? (related to PostgreSQL
> only).
>
> We currently run PostgreSQL on Linux servers with the data on dedicated
> Netapp filers over NFS. We have had no problems so far and performance
> is very acceptable.
>
> If there is something I need to watch out for, I would like to know.
Good question. It is my understanding that fsync, locking, and the
order of writes is not guaranteed in NFS like it is for local file
systems. I question how well it would handle any of the failure modes
that local file systems can withstand.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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