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Hello and Happy Holidays! This is sort of a follow-up to a
posting I sent last week about GFS and Cluster Suite performance and
stability. I ran some throughput (kBps and IOPS) tests on a server
running RHEL4.5 with RHCS and GFS. The goal was to complete a brief set
of tests to show some basic performance differences between GFS, direct iSCSI (using
EXT3 on the LUN) and EXT3 on a local SAS disk. There weren’t many test
runs so certainly there’s room for error and differences, but in general,
the ~35% and ~60% performance degradation on GFS versus the local disk did
manifest itself in some runs we did with our own applications, in places where
we were reading or writing heavily. Does this performance difference
make sense to you? The iSCSI-direct was on the same EqualLogic appliance
as the GFS volumes were on, so no change in the storage array or GbE
switch. It was also the same server in all the tests. Local disk
was JBOD on Dell PERC5/i. - K
-- Kamal Jain kjain@xxxxxxxxxxxxxxxxxxx +1 978.893.1098 (office) +1 978.726.7098 (mobile) Auraria Networks, Inc. 85 Swanson Road, Suite 120 Boxborough, MA 01719 USA www.aurarianetworks.com |
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