USC_New Measurement Abstractions for Data Centers

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1、NewMeasurementAbstractionsforDataCentersMinlanYuUniversityofSouthernCalifornia1KeyChallengesinDataCenters•Servicelevelagreements–Good,predictableperformance•Multi-tenancy–Resourceisolationacrosstenants•Costreduction–DrivethenetworktohighutilizationAllrequirefine-grainednetwor

2、kmanagement2Management=Measurement+ControlPerformanceDiagnosisMeasuredelay,IsolateandfixperformancethroughputofflowsproblemsSecurityCapturetrafficFilteroutorblockmaliciousanomaliestraffic/tenantsTrafficEngineeringCollectper-flowInstallroutingrulesstatisticsandchanges3Thestate

3、oftoday’sDatacentermeasurementTheneedfornewmeasurementabstractions4ManyMeasurementProgramsMonitorflowvolumesPerformanceAnomalydiagnosisdetectionQueryindependence:Specifymanymeasurementquerieswithsimple,programmableabstractions5ManyDataCollectionPrimitives•Passivelycollectdiff

4、erentsourcesofdataàLittlecontrolonwhat(not)tomeasureTargetindependence:Specifywhichdatatocollectindependentofwhereandhowitiscollected6LimitedMeasurementResources40Gbpsor100GbpsSwitchSmall,onchipmemoryControlfunctionsMeasurementToday,toreduceresourceusage•Lowsamplingrates•Miss

5、manyimportantinformationReconfigurable:Dynamicallychangethewayresourcesareusedfordifferentmeasurementqueriesandtraffic7ANewAbstractionforMeasurementSpecifymeasurementqueriesMeasurementFrameworkQueryindependence:ExpressiveAbstractionsformanyqueriesReconfigurable:EfficientRunti

6、meDynamicallyconfigureAutomaticallycollectdevices&manageresourcestherightdataTargetindependence:Implementableformanydevices8ExpressiveAbstractions(OpenSketch)PickingthepacketstomeasureStoring&exportingdataFiltertrafficaggregatesDynamicallyflowstocounters(e.g.,tohostA)(e.g.,mo

7、recountersforClassifyasetofflowselephantflows)(e.g.,asetofmalicioussourceIPs)pktParsingMatchingReconfigurable(onheaders&(OnheadersCountingtheirhashes)andhashes)9SupportManyQueriespktParsingMatchingReconfigurable(onheaders&(OnheadersCountingtheirhashes)andhashes)HowmanyuniqueI

8、PssendtraffictohostA?BitmapHash0001000101010OnsourceIP10SupportManyQ