On Fri, 24 Jul 2009, Bob Friesenhahn wrote:
This seems like rather low random write performance. My 12-drive array of
rotating rust obtains 3708.89 ops/sec. In order to be effective, it seems
that a synchronous write log should perform considerably better than the
backing store.
Actually, it seems that the options used when testing the SSD do not
request synchronous writes so your results are flawed. This is what I
get with rotating rust when using identical iozone options to yours:
Children see throughput for 6 random writers = 28567.95 ops/sec
Parent sees throughput for 6 random writers = 16274.03 ops/sec
Min throughput per process = 4134.08 ops/sec
Max throughput per process = 5529.43 ops/sec
Avg throughput per process = 4761.33 ops/sec
Min xfer = 98038.00 ops
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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