[Lustre-devel] Async close RPC

Oleg Drokin Oleg.Drokin at Sun.COM
Mon Mar 30 07:52:17 PDT 2009


On Mar 30, 2009, at 10:42 AM, Brian J. Murrell wrote:
>>    It recently struck me as how unfair many file creation tests are
>> to Lustre. The problem is only with tests because they portray Lustre
>>    creation rates lower than actual speed to be seen by application.
>> (same goes for opens, btw).
> The only thing I would add/say Oleg, is have you looked at the Hendrix
> CMD specific metadata tests?  I only mention this because from what I
> recall, we took advantage of every opportunity we could (within the
> requirements of the project) to show performance in the best light we
> could.  I'd imagine that those tests (and the corresponding Lustre  
> code_
> would have considered some of the same things you are considering.

Yes. As I said, I am aware CMD project tried this idea and found it to  
of no help. I am not deeply aware of the details, though.

> It may be however that some of the solutions were CMD specific and not
> really applicable to you, but perhaps in the least, looking at some of
> those tests (i.e. mdsrate was one key test) might prevent you from
> re-inventing tests.

I am not reinventing tests, I just want to make existing tests to show
more fair number when run on Lustre.


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