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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

  parent reply	other threads:[~2007-07-16 15:50 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <alpine.LRH.0.999.0707131356520.25773@chaos.egr.duke.edu>
2007-07-13 18:35 ` 3ware 9650 tips Justin Piszcz
2007-07-13 18:54   ` Jon Collette
2007-07-13 19:36     ` 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
2007-07-16 17:40             ` Al Boldi
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
2007-07-13 19:04   ` Joshua Baker-LePain
2007-07-13 23:30     ` Michael Tokarev
2007-07-14  1:23   ` Andrew Klaassen
2007-07-14  8:08     ` Justin Piszcz
2007-07-14 16:10       ` Andrew Klaassen
2007-07-14 16:11         ` Justin Piszcz
2007-07-14 16:14           ` Andrew Klaassen
2007-07-14 16:18             ` Justin Piszcz
2007-07-14  9:04   ` Mikael Abrahamsson
2007-07-14 16:11     ` Andrew Klaassen

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