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 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
