observed significant performance improvement using "delaylog" in

[Dave Chinner]

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 at fromorbit.com