Re: 3ware 9650 tips

Eric Sandeen
2007-07-16T15:50:33Z

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