Re: Tweaking/Optimizing MD RAID: 195MB/s write, 181MB/s read (so far)

[David Chinner <dgc@xxxxxxx>]

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