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Re: observed significant performance improvement using "delaylog" in

To: Steven Pratt <slpratt@xxxxxxxxxxxxxx>
Subject: Re: observed significant performance improvement using "delaylog" in
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Mon, 16 Aug 2010 11:03:01 +1000
Cc: Martin Steigerwald <Martin@xxxxxxxxxxxx>, xfs@xxxxxxxxxxx, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, Keith Mannthey <kmannth@xxxxxxxxxx>
In-reply-to: <4C688691.2020100@xxxxxxxxxxxxxx>
References: <201008121346.30760.eye.of.the.8eholder@xxxxxxxxx> <20100813141344.GE10429@dastard> <4C65AE4D.6070502@xxxxxxxxxxx> <201008141328.18436.Martin@xxxxxxxxxxxx> <4C688691.2020100@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)
On Sun, Aug 15, 2010 at 07:30:09PM -0500, Steven Pratt wrote:
> Martin Steigerwald wrote:
> >Hi!
> >
> >Cc'd Steve as I think he is running the benchmarks.
> >
> >Am Freitag 13 August 2010 schrieb Eric Sandeen:
> >>Dave Chinner wrote:
> >>>On Fri, Aug 13, 2010 at 08:29:07AM -0400, Christoph Hellwig wrote:
> >>...
> >>
> >>>>And asking
> >>>>him/her to add -o delaylog would also be good.
> >>>Yes, that would be an interesting comparison...
> >>I was thinking the same thing; I'll do that.
> >
> >I think its Steven Pratt from IBM.
> >
> >Steve, could you add a case for mount option "-o delaylog" to your
> >benchmark runs?
> Which filesystem is this for?  Keith has been helping me with some
> of these runs. We'll see if we can add this.

XFS - it's a new mount option for 2.6.35. Gory details in
Documentation/filesystems/xfs-delayed-logging-design.txt.

Cheers,

Dave.

-- 
Dave Chinner
david@xxxxxxxxxxxxx

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