From: Jon Schewe <jpschewe@mtu.net>
To: Bryan Hinton <bryan@bryanhinton.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: How filesystems matter with PostgreSQL
Date: Fri, 04 Jun 2010 13:44:18 -0500
Message-ID: <4C094982.4040203@mtu.net> (raw)
In-Reply-To: <AANLkTilAKL8O5M8l_tB17ZatikvftYlO-fnWZQnGjVEN@mail.gmail.com>
References: <4C08EEDF.7090403@mtu.net>
<201006041504.03218.andres@anarazel.de>
<2503.1275661530@sss.pgh.pa.us>
<201006041633.23343.andres@anarazel.de>
<4C094553.7040000@mtu.net>
<AANLkTilAKL8O5M8l_tB17ZatikvftYlO-fnWZQnGjVEN@mail.gmail.com>
I just used standard mkfs for each filesystem and mounted them without
options, unless otherwise specified.
On 6/4/10 1:37 PM, Bryan Hinton wrote:
> What types of journaling on each fs?
>
>
> On Fri, Jun 4, 2010 at 1:26 PM, Jon Schewe <jpschewe@mtu.net
> <mailto:jpschewe@mtu.net>> wrote:
>
> On 6/4/10 9:33 AM, Andres Freund wrote:
> > On Friday 04 June 2010 16:25:30 Tom Lane wrote:
> >
> >> Andres Freund <andres@anarazel.de <mailto:andres@anarazel.de>>
> writes:
> >>
> >>> On Friday 04 June 2010 14:17:35 Jon Schewe wrote:
> >>>
> >>>> XFS (logbufs=8): ~4 hours to finish
> >>>> ext4: ~1 hour 50 minutes to finish
> >>>> ext3: 15 minutes to finish
> >>>> ext3 on LVM: 15 minutes to finish
> >>>>
> >>> My guess is that some of the difference comes from barrier
> differences.
> >>> ext4 uses barriers by default, ext3 does not.
> >>>
> >> Or, to put it more clearly: the reason ext3 is fast is that
> it's unsafe.
> >>
> > Jon: To verify you can enable it via the barrier=1 option during
> mounting..
> >
> >
> >
> First some details:
> Linux kernel 2.6.31
> postgres version: 8.4.2
>
> More test results:
> reiserfs: ~1 hour 50 minutes
> ext3 barrier=1: ~15 minutes
> ext4 nobarrier: ~15 minutes
> jfs: ~15 minutes
>
> --
> Jon Schewe | http://mtu.net/~jpschewe <http://mtu.net/%7Ejpschewe;
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> signature. See http://www.gnupg.org for more information.
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--
Jon Schewe | http://mtu.net/~jpschewe
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To: pgsql-performance@postgresql.org
Cc: jpschewe@mtu.net, bryan@bryanhinton.com, andres@anarazel.de, tgl@sss.pgh.pa.us
Subject: Re: How filesystems matter with PostgreSQL
In-Reply-To: <4C094982.4040203@mtu.net>
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