Messages in this thread | | | Date | Mon, 01 Mar 2010 01:39:18 -0700 | From | Andreas Dilger <> | Subject | Re: EXT4 is ~2X as slow as XFS (593MB/s vs 304MB/s) for writes? |
| |
On 2010-02-28, at 07:55, Justin Piszcz wrote: > === CREATE RAID-0 WITH 11 DISKS
Have you tried testing with "nice" numbers of disks in your RAID set (e.g. 8 disks for RAID-0, 9 for RAID-5, 10 for RAID-6)? The mballoc code is really much better tuned for power-of-two sized allocations.
Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.
| |