I tried Neil Brown's Raid5 patch. I have a HUGE improvement in the bonnie.
Factors of 3 in block writes and factors of two in block reads:
RAID5 500 7763 80.5 8116 3.6 6285 4.8 7189 75.4 33334 16.1 305.3 1.8
(with 128K chunk default 2.4.0-test9)
RAID5 500 8928 92.2 27698 14.1 14341 13.8 8362 93.6 64268 65.4 404.5 2.0
(same but with NeilBrown's patch)
RAID0 500 8672 93.3 53745 27.0 25289 20.1 9367 99.1 84056 48.6 415.4 2.6
(with 32K chunk for reference)
Any suggestions on torture tests?
--Martin
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