Messages in this thread | | | Date | Sun, 17 Jan 1999 18:52:35 +0000 (GMT) | From | Chris Evans <> | Subject | RAID0: performance oddity (2.2.0pre7) |
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Hi,
I have a raid0 array of 2 disks, both of which can do ~6.5Mb/sec.
With chunksize = 4k (default), the md0 device can shift ~11.5Mb/sec. Not bad.
However bumping up the chunksize to 64k _decreases_ performance on the array to ~6Mb/sec. This is slower than either individual disk!
I would have thought increasing chunksize would increase performance due to decreased overhead?
Performance measurements are taken using "hdparm"
Cheers Chris
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