Hello,
I'm benchmarking a new FC-attached storage system which we are bringing
into production, in order to see if it yields acceptable performance -
and to have a baseline for potential performance trouble in the future.
One of the tools I'm using is fio, which is certainly great. Especially
the fact that it includes data regarding latencies, and that it makes it
easy to have a mix of reads and writes.
Now, compared to an another FC-attached storage system, and compared to
a local RAID10, the new system yields fio numbers which are extremely
much better.
This made me have a quick and superficial look into the files which fio
works with. I seems that the files contain only 0-bytes.
Does fio only write bytes with a single value?
If so: I would be afraid that some kind of
compression/de-duplication/thin provisioning feature in the storage
system invalidates the fio results I'm seeing. Is this a valid fear?
--
Regards,
Troels Arvin <troels@xxxxxxxx>
http://troels.arvin.dk/
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