On July 24, 2004 05:03 am, Russell Coker <russell(a)coker.com.au> wrote:
Last time I did some tests on Linux software RAID I found that it
was
lacking in this regard. I would have hoped to see some read benchmarks
showing that a RAID-1 with two disks is nearly twice as fast as a single
disk, however I didn't find any test that showed such a result or anything
close to it. Optimising the read performance of Linux software RAID is one
thing that can be done to improve such things (and generally improve all
Linux performance).
You actually expect to get twice the performance out of a RAID 1 array in
software RAID? First of all writes are not going to be any faster than a
single drive and could be slower depending on your hardware. Reads could be
faster depending on you hardware but twice? Only very highend (expensive)
SCSI raid cards do that and only theoretically. Practically you won't get
twice the performance.
regards,
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