From: Eric Sandeen <sandeen@sandeen.net>
To: David Chinner <dgc@sgi.com>
Cc: Justin Piszcz <jpiszcz@lucidpixels.com>,
Jon Collette <jon@etelos.com>,
Joshua Baker-LePain <jlb17@duke.edu>,
linux-ide-arrays@lists.math.uh.edu, linux-raid@vger.kernel.org,
xfs@oss.sgi.com
Subject: Re: 3ware 9650 tips
Date: Mon, 16 Jul 2007 10:50:34 -0500 [thread overview]
Message-ID: <469B93CA.30801@sandeen.net> (raw)
In-Reply-To: <20070716122225.GB31489@sgi.com>
David Chinner wrote:
> On Mon, Jul 16, 2007 at 12:41:15PM +1000, David Chinner wrote:
>> On Fri, Jul 13, 2007 at 03:36:46PM -0400, Justin Piszcz wrote:
...
>> If you've got any sort of serious disk array, ext3 is not the filesystem
>> to use....
>
> To show what the difference is, I used blktrace and Chris Mason's
> seekwatcher script on a simple, single threaded dd command on
> a 12 disk dm RAID0 stripe:
>
> # dd if=/dev/zero of=/mnt/scratch/fred bs=1024k count=10k; sync
>
> http://oss.sgi.com/~dgc/writes/ext3_write.png
> http://oss.sgi.com/~dgc/writes/xfs_write.png
Were those all with default mkfs & mount options? ext3 in writeback
mode might be an interesting comparison too.
-Eric
next prev parent reply other threads:[~2007-07-16 15:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <alpine.LRH.0.999.0707131356520.25773@chaos.egr.duke.edu>
[not found] ` <Pine.LNX.4.64.0707131434470.31742@p34.internal.lan>
[not found] ` <4697CA4D.6020304@etelos.com>
2007-07-13 19:36 ` 3ware 9650 tips Justin Piszcz
2007-07-16 2:41 ` David Chinner
2007-07-16 12:22 ` David Chinner
2007-07-16 12:39 ` Bernd Schubert
2007-07-16 15:50 ` Eric Sandeen [this message]
2007-07-16 22:21 ` David Chinner
2007-07-16 15:43 ` Joshua Baker-LePain
2007-07-16 17:15 ` [Advocacy] " Bryan J. Smith
[not found] ` <200707162040.00062.a1426z@gawab.com>
2007-07-16 17:48 ` Matthew Wilcox
2007-07-16 18:28 ` [RFC] VFS: data=ordered (was: [Advocacy] Re: 3ware 9650 tips) Al Boldi
2007-07-16 19:02 ` Matthew Wilcox
2007-07-16 18:38 ` [Advocacy] Re: 3ware 9650 tips Bryan J. Smith
2007-07-16 17:34 ` Stuart Levy
2007-07-16 18:44 ` [Advocacy] " Bryan J. Smith
2007-07-17 17:30 ` Simon Matter
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