From: Dave Chinner <david@fromorbit.com>
To: Norbert Veber <nveber@pyre.virge.net>
Cc: Michael Monnerie <michael.monnerie@is.it-management.at>, xfs@oss.sgi.com
Subject: Re: Small files perform much faster on newly formatted fs?
Date: Thu, 9 Jun 2011 11:29:07 +1000 [thread overview]
Message-ID: <20110609012907.GR32466@dastard> (raw)
In-Reply-To: <20110608122638.GQ28625@pyre.virge.net>
On Wed, Jun 08, 2011 at 08:26:38AM -0400, Norbert Veber wrote:
> On Wed, Jun 08, 2011 at 09:11:10AM +0200, Michael Monnerie wrote:
> > On Dienstag, 7. Juni 2011 Norbert Veber wrote:
> > > 20 seconds vs 3+ minutes?! The only difference I can see is
> > > lazy-count=1 and a larger agcount. Sunit and swidth were also set
> > > automatically by mkfs this time.
> >
> > Then retry mounting the old fs with sunit= and swidth= parameters. Are
> > they on the same disks? What are your disks (number, kind)?
>
> Yes its already mounted this way as I mentioned in my original message:
> /dev/mapper/vg0-shared on /shared type xfs (rw,noatime,sunit=128,swidth=256)
Those mount options are ignored if the filesystem doesn't have the
superblock feature bit set for aligned allocations. A filesystem
with 0/0 for sunit/swidth does not have the superblock bit set....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2011-06-09 1:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 16:37 Small files perform much faster on newly formatted fs? Norbert Veber
2011-06-08 7:11 ` Michael Monnerie
2011-06-08 12:26 ` Norbert Veber
2011-06-08 13:47 ` Michael Monnerie
2011-06-08 18:58 ` Norbert Veber
2011-06-09 5:44 ` Michael Monnerie
2011-06-08 20:52 ` Eric Sandeen
2011-06-08 21:16 ` Eric Sandeen
2011-06-09 1:29 ` Dave Chinner [this message]
2011-06-09 8:22 ` Christoph Hellwig
2011-06-09 13:48 ` Norbert Veber
2011-06-09 16:30 ` Michael Monnerie
2011-06-09 20:30 ` Norbert Veber
2011-06-09 21:17 ` Dave Chinner
2011-06-10 0:54 ` Norbert Veber
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