pio-benchmark

ParallelI/OBenchmarkingConsortiumMay21,20021 StatementofPurposeThepurposeoftheParallelI/OBenchmarkingConsortiumistoprovideasetofbenchmarksforuseincharacterizingtheperformanceofaparallelI/Osystem. Aconcisesetwillbeusedforobtainingan”ataglance”viewofI/Osystemperformance,andanextendedsetwillbeprovidedfordiscoveringregionsofpoorperformancewithinalargespaceofaccesscharacteristics. Thesetestswillfollowaconsistenttestingmethodology,definedbytheconsortium,tohelpwithcomparingresultsacrosstests.ThetestwillnotattempttomeasurecorrectnessoftheunderlyingI/Osystemimplementation,norwillitattemptto”score”theI/Osystemtoaidingenerationofa”Top500I/Osystems”orthelike.2 OverviewofTestSuiteTestswillconsistofparallelapplicationsutilizingMPIforcommunicationandstartupandMPI IOorPOSIXinterfacesforI/Oaccess.Thesetwointerfacesareinsomesensethelowestcommondenominatorandcanbeexpectedtoexiston most parallel I/O systems. We will avoid the use of alternative native interfaces, such as the PVFSlibpvfs library, in order to maintain the portability of the benchmark suite. [ This can be revisited astimegoeson;perhapsthereisamechanismforhidingtheseparticularinterfacesundersomegenericinterfaceinordertokeepthedetailsoutoftheindividualtests? ]The suite will consist of many small test applications, each designed to focus on a particular modeof access or I/O system characteristic, rather than a small set of monolithic test applications. Thisshould ease modification of particular tests when groups ...