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SPC performance report SilvertonConsulting,Inc.StorInt™DispatchThisStorageIntelligence(StorInt™)dispatchcoversStoragePerformanceCouncil(SPC)results1.SPChasrecentlyreleasedanewversionoftheirSPC-1benchmark,V3.TherehavebeennonewSPC-1V1submissionssinceourlastreportbuttherehasbeen1newV3submission,theIBMDS8888(AFA).Fornow,wewillincludeallV3andV1SPC-1submissionstogetherinouranalysis.ThemajorIOdifferencebetweenthetwoisthatV3usesalargerfixedblocksizethanV1,(8KBvs.4KB)2andwhilethismighttakeanextramicrosecondortwototransferat16Gbps,itseemsunlikelytoimpactIOPSandLRTresultsthatmuch.TherehavebeennonewSPC-2submissions

SPC-1resultsWebeginourdiscussionwithtoptenSPC-1LRT™(LeastResponseTime)resultsshowninFigure1.

Figure1Top10SPC-1LRTresults

1AllSPCresultsavailablefromhttp://www.storageperformance.org/home/asof24Nov20162SPC-1V3specificationcanbefoundathttp://www.storageperformance.org/specs/SPC1_v320_final.pdf

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SPC-1V3nolongerreportsonLRTbutthereisasimilarmetric(RAMPD_10AverageResponseIOtime)inthedetailedmetricsprovidedinthesubmission.FromnowonwewilljustrefertothisasLRTbutnoteLRTisnotformerlyreportedanymore.TherearenochangesinFigure1fromlastquarter’sreviewbuttheIBMDS8888justmissedthetoptenwithanLRT*3of0.254msec.Next,weturntoSPC-1toptenIOPS™inFigure2.

Figure2SPC-1Top10IOPS™

HeretheIBMDS8888camein5thplacewith1.5MIOPS.TheDS8888had240400GBFlashmoduleswith2048GBofDRAMmemoryandused16GbpsFCasthefrontendinterface.AsthiswasSPC-1V3theDS8888wasalsodoinglargerfixedblockIOsthanthe(V1)competitionbutagainthedifferenceshouldbenegligible.Thereisonlyonehybrid(disk-SSD)systemthatremainsonourSPC-1IOPSTopTenandthatistheHuaweiOceanStor18800(#8).WeturnnowtoIOPS/Drivefordisk-onlysystemsinFigure3.

3TheRAMPD_10Avg.ResponseIOtimemetriccanbefoundinSPC1_Metrics_0_Quick_Look.xlsxfileinSupportingFilesforSPC-1V3benchmarksubmissions

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Figure3Top10SPC-1IOPS/(disk-)drive

InFigure3,theIBMStorwizeV5030systemcameinat#9with354IOPS/diskdrive.Ithad240300GB15KRPMdiskdriveswith64GBofDRAMmemoryandthediskswereSASattachedtothetwocontrollers.Asyoumayrecall,wementionedtheIBMStorwizeV5030asthefirstV3submissioninourlastreportbutatthetimehadnotincorporateditintoour(V1)performanceanalysis,wedosonow.Again,theSPC-1V3benchmarkdoeslargerfixedblockIOs(8KBvs4KB)whichmightbeaslightdisadvantagebutprobablyisn’tmeasurableatthisscale.It’sunusualtoseeanewdisk-onlySPC-1submission,especiallyfromamajorvendor(IBM).It’salmostasiftheynolongerwanttoeventalkofdisk-onlystorageanymore.Andyetwebelieve,there’sstillroomforperformanceimprovementevenindisk-onlystorage,letalonehybridsystems.

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SignificanceForthemoment,afterreviewingboththeV3andV1specificationforSPC-1wehaveconcludedtojustincorporatethembothintothesameSPC-1analysis.It’sunclearwhetherSPChasstoppedacceptingnewsubmissionswithSPC-1V1.WereservetherighttosplitV3submissionsoutifwedeterminethattheV3andV1workloadsaredifferentenoughtowarranttheirseparation.AFAsystemscontinuetheirmarchtodominatingLRTandnowIOPStoptenpositions.ThereremainsonlyonehybridstoragesystemleftintheIOPStoptenbutit’sbeingslowlypushedoffbyallthenewAFAstoragesystemperformance.Asalways,suggestionsonhowtoimproveanyofourperformanceanalysesarewelcomed.Additionally,ifyouareinterestedinmoreblockstorageperformanceinformation,checkoutourrecentlyupdated(November2016),SANStorageBuyingGuideavailableforpurchasefromourwebsite4.IntheSANStorageBuyingGuidewenowprovidetop30resultsforsomeofourSPCperformancechartsandnew,SCIderived,OLTP,ThroughputandEmailChampionsCharts™forenterprise,all-flash,mid-rangeandSMBclassSANstoragesystems.

Silverton Consulting, Inc., is a U.S.-based Storage, Strategy & Systems consulting firm offering products and services to the data storage community

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4Availableathttp://silvertonconsulting.com/cms1/product/san-storage-buying-guide/