On Tue, Apr 10, 2007 at 11:33:34AM -0400, [EMAIL PROTECTED] wrote: > Hi, > What would be the best i/o benchmark that one can use to evaluate parallel > filesystem like pvfs (what has been used until now). Does using Dbench > make sense? i need more i/o benchmarks.
PVFS comes with a couple simple benchmarks: - test/client/mpi-io/mpi-io-test.c measures aggregate bandwidth for large contiguous parallel accesses via MPI-IO - test/client/mpi-io/mpi-md-test.c measures MPI-IO metadata operations LLNL has written a variety of IO benchmarks (IOR is perhaps the most widely known, but the other tests are good too) http://www.llnl.gov/icc/lc/siop/downloads/download.html b_eff_io produces a lot of information, but it's a good one too: http://www.hlrs.de/organization/par/services/models/mpi/b_eff_io/ dbench doesn't make sense for a parallel file system because it is a serial application and also focuses heavily on metadata operations. We do use dbench as a correctness test. Likewise, bonnie++ and iozone, while very popular benchmarks, are better suited for local file systems. See http://www.pvfs.org/pvfs2-faq.html#sec:badperf for more information. If you can tell us what sort of workload you want to use against PVFS, we can let you know some appropriate benchmarks. ==rob -- Rob Latham Mathematics and Computer Science Division A215 0178 EA2D B059 8CDF Argonne National Lab, IL USA B29D F333 664A 4280 315B _______________________________________________ Pvfs2-developers mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
