From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Rod Taylor <rbt(at)rbt(dot)ca> |
Cc: | Andrew Sullivan <andrew(at)libertyrms(dot)info>, Postgresql Performance <pgsql-performance(at)postgresql(dot)org> |
Subject: | Re: Perfomance Tuning |
Date: | 2003-08-08 19:34:44 |
Message-ID: | 200308081934.h78JYi906553@candle.pha.pa.us |
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Lists: | pgsql-performance |
Rod Taylor wrote:
-- Start of PGP signed section.
> On Fri, 2003-08-08 at 14:53, Andrew Sullivan wrote:
> > On Fri, Aug 08, 2003 at 09:40:20AM -0700, Jonathan Gardner wrote:
> > >
> > > Redhat puts ext3 on by default. Consider switching to a non-journaling FS
> > > (ext2?) with the partition that holds your data and WAL.
> >
> > I would give you exactly the opposite advice: _never_ use a
> > non-journalling fs for your data and WAL. I suppose if you can
> > afford to lose some transactions, you can do without journalling.
> > Otherwise, you're just borrowing trouble, near as I can tell.
>
> Agreed.. WAL cannot recover something when WAL no longer exists due to a
> filesystem corruption.
It is true that ext2 isn't good because the file system may not recover,
but BSD UFS isn't a journalled file system, but does guarantee file
system recovery after a crash --- it is especially good using soft
updates.
--
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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