Hello!
On Dec 22, 2010, at 1:43 AM, Kevin Van Maren wrote:
>> Would be interesting to confirm the amount of RPCs actually being processed
>> on the server at any one time, I think.
>> Did you try the direct IO too? Some older version of lustre used to send all
>> outstanding directio RPCs in parallel, so if you did your IO as just a
>> single direct IO write, the latency of that write should be around a couple
>> of RTTs. I think that we still do this even in 1.8.5, so it would make an
>> interesting comparison.
> You probably want to look at the brw_stats for a single client NID to do
> that. Unless you are running 1.8.5, check out the patch in Bug 23827
> (and maybe 23826).
Actually there was a single client only in the original test it seems, so we
can check the aggregated brw_stats (just need to zero it out before the test
run).
Bye,
Oleg
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