[Lustre-devel] using LST for performance testing

David Dillow dillowda at ornl.gov
Wed Sep 30 06:53:15 PDT 2009

On Tue, 2009-09-29 at 14:02 -0400, Nic Henke wrote:
> David Dillow wrote:
> > Along these lines, it would be nice if we could specify a run time for
> > each test rather than an amount of data to be transferred -- it makes it
> > easier to get aggregate bandwidth numbers, and often shows imbalances
> > nicely -- the node getting starved is the one that transfers less data.
> >   
> > It may also make sense to add a 'delay' parameter that causes each test
> > to wait a specified amount of time from the 'go' signal. This allows the
> > signal to propagate without running into congestion from the test,
> > helping to cause all of the clients to start the test closer to
> > simultaneously.
> >   
> Interesting - can you elaborate, perhaps in the form of a patch  ? :-) I 
> like both ideas, but not signing up to code them just yet.

Maybe, but it is going to be well down the list -- I owe Oleg a large
amount of testing before I think of doing anything else. :)
Dave Dillow
National Center for Computational Science
Oak Ridge National Laboratory
(865) 241-6602 office

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