Best way to measure client and recovery I/O

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I've been working with Sam Just today and we would like to get some
performance data around client I/O and recovery I/O to test the new Op
queue I've been working on. I know that we can just set and OSD out/in
and such, but there seems like there could be a lot of variation in
the results making it difficult to come to a good conclusion. We could
just run the test many times, but I'd love to spend my time doing
other things.

Please let me know if you have any great ideas around this problem.

Thanks,
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Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904  C70E E654 3BB2 FA62 B9F1
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