Re: ext3 filesystem / linux 7.3

hi jeff,

go to
http://www.ca.postgresql.org/docs/momjian/hw_performance/
under 'filesystems' slide.

snip

File system choice is particularly difficult on Linux
because there are so many file system choices, and
none of them are optimal: ext2 is not entirely
crash-safe, ext3, XFS, and JFS are journal-based, and
Reiser is optimized for small files and does
journalling. The journalling file systems can be
significantly slower than ext2 but when crash recovery
is required, ext2 isn't an option. If ext2 must be
used, mount it with sync enabled. Some people
recommend XFS or an ext3 filesystem mounted with
data=writeback.

/snip

--- "Jeffrey D. Brower" <jeff@pointhere.net> wrote:
> What is the URL of that article?  I understood that
> ext2 was faster with PG
> and so I went to a lot of trouble of creating an
> ext2 partition just for PG
> and gave up the journalling to do that.  Something
> about double effort since
> PG already does a lot of that.
>
> Bruce, is there a final determination of which is
> faster/safer?
>
>     Jeff
>
> ----- Original Message -----
> From: "Shankar K" <shan0075@yahoo.com>
> To: <pgsql-performance@postgresql.org>
> Sent: Monday, March 31, 2003 3:55 PM
> Subject: [PERFORM] ext3 filesystem / linux 7.3
>
>
> > hi there,
> >
> > I was reading bruce's 'postgresql hardware
> performance
> > tuning' article and he has suggested ext3
> filesystem
> > with data mode = writeback for high performance.
> >
> > I would really appreciate if anyone could share
> your
> > experiences with ext3 from a production stand
> point or
> > any other suggestions for best read/write
> performance.
> >
> > Our applications is an hybrid of heavy
> inserts/updates
> > and DSS queries.
> >
> > version - postgres 7.3.2
> > hardware - raid 5 (5 x 73 g hardware raid), 4g
> ram, 2
> > * 2.8 GHz cpu, redhat 7.3
> >
> > Note : we don't have the luxury of raid 1+0
> (dedicated
> > disks) for xlog and clog files to start with but
> may
> > be down the line we might look into those options,
> but
> > for now i've planned on having them on local
> drives
> > rather than raid 5.
> >
> > thanks for any inputs,
> > Shankar
> >
> >
> >
> >
> >
> >
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