On Tue, 20 Apr 2010 at 9:36pm, Henning Fehrmann wrote
These extreme case illustrate the difficulty to interpret the results
reliably. It would make more sense to have a tool at hand which starts a
test on many clients simultaneously and do a count of the IO operation
within a particular time interval. The simultaneity is not a problem
here - this can be achieved by scripts. These results can be safely
added together to obtain a overall IO-rate.
Do you know such a tool or are there other ways to get a picture of a IO
capability of cache-file server?
Have a look at IOR, which uses MPI to coordinate the clients.
http://sourceforge.net/projects/ior-sio/
--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
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