| To: | David Chinner <dgc@xxxxxxx> |
|---|---|
| Subject: | Re: 3ware 9650 tips |
| From: | Eric Sandeen <sandeen@xxxxxxxxxxx> |
| Date: | Mon, 16 Jul 2007 10:50:34 -0500 |
| Cc: | Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>, Jon Collette <jon@xxxxxxxxxx>, Joshua Baker-LePain <jlb17@xxxxxxxx>, linux-ide-arrays@xxxxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx |
| In-reply-to: | <20070716122225.GB31489@sgi.com> |
| References: | <alpine.LRH.0.999.0707131356520.25773@chaos.egr.duke.edu> <Pine.LNX.4.64.0707131434470.31742@p34.internal.lan> <4697CA4D.6020304@etelos.com> <Pine.LNX.4.64.0707131535270.2064@p34.internal.lan> <20070716024115.GJ12413810@sgi.com> <20070716122225.GB31489@sgi.com> |
| Sender: | xfs-bounce@xxxxxxxxxxx |
| User-agent: | Thunderbird 2.0.0.4 (Macintosh/20070604) |
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 |
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