MDS-Survey Simulating Large Clients Loads on MDS.pptx

MDS-SurveySimulatingLargeClientsLoadsonMDSOlegDrokinSeniorSoftwareEngineerWhamcloud,,RichardHenwood,JamesSimmonsofORNLTexasMemorySystemsAcknowledgments4Howitallstarted5#ofrequestsTime,(cont’d)6Zoomingintoasingleiteration,,ioctlplugsstraightintomddlayerOnlymds-localtestingpossibleasaresultSamefamiliarecho_clientinterfaceaswithobdfiltertestingCurrentimplementation8Eachthreadcouldperformoneofthefollowingoperationsinaloop(sequentialnumberedfilenames):CreateafileoradirectoryLookupafilenameUnlink/deleteafile/directoryForcreatesyouhaveachoiceofstriping,ornostripingAlloperationshappenintheLustrenamespaceSupportedoperations9#--MDT0000_UUIDsetuplustre---MDT0001_UUIDsetuplustre-MDT0000mddcfg_device7test_mkdir/teststest_mkdir/tests1test_mkdir/tests2test_mkdir/tests3--threads4-17test_create-d/tests-b2-n1000--threads4-17test_create-d/tests-D4-b20000-n1000--threads4-17test_destroy-d/tests-b2-n1000--threads4-17test_destroy-d/tests-D4-b20000-n1000Examplelctlscript10