Re: EXT4 is ~2X as slow as XFS (593MB/s vs 304MB/s) for writes?

From: Andreas Dilger
Date: Mon Mar 01 2010 - 03:39:29 EST

On 2010-02-28, at 07:55, Justin Piszcz wrote:

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.

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