On 07/03/2014 12:28 PM, Yuyang (Alex) Wang wrote:
Carl,
Specifying them as separate jobs will do what I expect. However, in
this case, I am seeking to know how much performance and how many
devices can a __single__ FIO process can drive. If my above
configuration is correct, then, for some reason, the single process
doesn't increase with more devices at its disposal, not as I have seen
from another benchmark tool - which is puzzling. I am curious to
understand why.
Best,
A.
If you want to benchmark fio throughput or the block layer, not your
actual raid array,
then use a ramdisk. There are lots of flash devices out there now which
will push far
more than 1.4GB/s from a single device, rest assured fio isn't your
limitation here.
1.4 GB/s with 1M block sizes isn't even 2k IOPS. fio pushes 500k IOPS
through the block layer
without issue, its not your limiting factor.
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