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Date: Thu, 11 Jan 2007 18:32:06 -0500 (EST)
From: Justin Piszcz <jpiszcz@lucidpixels.com>
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To: David Chinner <dgc@sgi.com>
cc: linux-raid@vger.kernel.org, xfs@oss.sgi.com
Subject: Re: Tweaking/Optimizing MD RAID: 195MB/s write, 181MB/s read (so
 far)
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Have not tried DM stripe btw.

On Fri, 12 Jan 2007, David Chinner wrote:

> On Thu, Jan 11, 2007 at 06:05:36PM -0500, Justin Piszcz wrote:
> > With 4 Raptor 150s & XFS (default XFS options):
> 
> I need more context for this to be meaningful in any way.
> 
> What type of md config are you using here?  RAID0, 1, 5.....?
> 
> What's the raw device throughput (i.e. read and write to /dev/md3)?
> 
> output of 'growfs_xfs -n <mntpt>'? (i.e. is XFS doing aligned
> or unaligned allocation/IO)?
> 
> If it's raid0, how does it compare with a dm stripe?
> 
> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> Principal Engineer
> SGI Australian Software Group
> 
>