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czwartek, 5 czerwca 2008

DS3200 performance tests #1

today I made some tests at DS3200, I'm fully dissapointed of it's power, but maybe I do sth wrong? Take a look:

# mount |grep reiser
/dev/sde1 on /tmp/test type reiserfs (rw,noatime,nodiratime)
/dev/sdf1 on /tmp/test2 type reiserfs (rw,noatime,nodiratime)
/dev/sdg1 on /tmp/test3 type reiserfs (rw,noatime,nodiratime)


everything connected from dual controller IBM DS3200 (SAS), with SATA 750GB disks.

/dev/sde1 is raid0 at 4 disks
/dev/sdf1 is raid10 at 4 disks
/dev/sdg1 is raid5 at 4 disks

and the tests:
# dd if=/dev/zero of=/tmp/test/pliczek count=5000 bs=1M 5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 66.6999 s, 78.6 MB/s


# dd if=/dev/zero of=/tmp/test2/pliczek count=5000 bs=1M
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 191.962 s, 27.3 MB/s


# dd if=/dev/zero of=/tmp/test3/pliczek count=5000 bs=1M
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 130.41 s, 40.2 MB/s


raid5 looks better than raid10?????

now read tests:
# dd if=/tmp/test/pliczek of=/dev/null count=5000 bs=1M
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 21.179 s, 248 MB/s


# dd if=/tmp/test2/pliczek of=/dev/null count=5000 bs=1M
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 33.007 s, 159 MB/s


# dd if=/tmp/test3/pliczek of=/dev/null count=5000 bs=1M
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 22.7079 s, 231 MB/s


why raid10 is much slower than raid5?

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