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Message-ID: <70c01d1d0808151231m407a52cbo8069200fe8078aa2@mail.gmail.com>
Date: Fri, 15 Aug 2008 12:31:04 -0700
From: "Mark Wong" <markwkm@gmail.com>
To: "Bruce Momjian" <bruce@momjian.us>
Subject: Re: file system and raid performance
Cc: david@lang.hm, pgsql-performance@postgresql.org,
	"Gabrielle Roth" <gorthx@gmail.com>
In-Reply-To: <200808151922.m7FJMxJ21964@momjian.us>
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References: <70c01d1d0808050757j34886207xbcbb76d475319b65@mail.gmail.com>
	<200808151922.m7FJMxJ21964@momjian.us>

On Fri, Aug 15, 2008 at 12:22 PM, Bruce Momjian <bruce@momjian.us> wrote:
> Mark Wong wrote:
>> On Mon, Aug 4, 2008 at 10:04 PM,  <david@lang.hm> wrote:
>> > On Mon, 4 Aug 2008, Mark Wong wrote:
>> >
>> >> Hi all,
>> >>
>> >> We've thrown together some results from simple i/o tests on Linux
>> >> comparing various file systems, hardware and software raid with a
>> >> little bit of volume management:
>> >>
>> >> http://wiki.postgresql.org/wiki/HP_ProLiant_DL380_G5_Tuning_Guide
>
> Mark, very useful analysis.  I am curious why you didn't test
> 'data=writeback' on ext3;  'data=writeback' is the recommended mount
> method for that file system, though I see that is not mentioned in our
> official documentation.

I think the short answer is that I neglected to. :)  I didn't realized
'data=writeback' is the recommended journal mode.  We'll get a result
or two and see how it looks.

Mark