reducing tco with datacom compression (presspack)

World®’16

ReducingTCOwithDatacomCompression(Presspack)KevinShuma,VPProductManagementCATechnologies

MFX94S

MAINFRAMEANDWORKLOADAUTOMATION

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Abstract

CometothissessiontolearnhowtheCADatacom®PresspackcanreducethetotalcostofownershipforCADatacom®environments.

CADatacom®PresspackisanoptionalcomponentoftheCADatacom®productfamilyandprovideshighperformancecompressionfordatarowsstoredinCADatacom®/DBdatabasetables.

KevinShuma

CATechnologiesVP,ProductManagement


Agenda

WHATARETHEBENEFITS/COSTSOFCOMPRESSION?

NEWONLINECOMPRESSABILITY– TA24

EXAMPLEOFONLINECOMPRESS

BENCHMARKINOURLAB

SUMMARYOFFINDINGS

1

2

3

4

5


Whatarethebenefitsofcompression?

§ Acompresseddatablocktypicallyhassignificantlymorerowswhichmeans– LessblocksonDASDtostorethesamenumberofrows– BetterdatabufferreusewhichreducesIOandimprovesperformance– Lessmemoryrequiredtoplacetablesinmemory(MRDF)– Quickerutilityprocessingforbackupsandloads(lessIO)

WhyshouldIconsidercompression?


Whatarethebenefitsofcompression?

§ Canmakedataless“readable”bynonCADatacom®utilitieslikeTSOBrowse

§ SlowingDASDgrowthandmultipleextentmanagement

SomeotherBenefitsofUsingCompression:


Whatarethecostsofcompression?

§ Requiresadataaccessoutagetoimplement

§ Noteasilyremovedorchanged

§ Hardtoswitchfromonevendortoanother

§ Usesexpensivegeneralpurposeprocessor(GPCPU)instructionstosavecheapDASD

WhyIShouldAvoidUsingCompression


UsingzIIPforCompression

§ zIIPprocessors– Canbeusedforin-memoryprocessinglikecompression– Canonlybeusedforcodeyouown

§ Cannotbeusedtoprocessimbeddeduser/vendorcode– Example:Non-CAcompressioncodeimbeddedinMUF

§ DatacomcompressionrunsonthezIIPprocessor(s)whilereducingtheIOswhichrunonGeneralPurposeprocessor(s)– EffectivelytradinginexpensivezIIPCPUforexpensiveGPCPU

TippingtheBalanceforUsingCompression


NewOnlineCompressAbility– TA24

§ Providestheusertheabilitytoalteratable’scompressionalgorithmwithoutinterruptingdataaccess

§ Avoidsacostlydataaccessoutagetoimplementorchangecompression

§ Compression/decompressionactivityrunsinbackgroundinMUF– UtilizeszIIPprocessorsforcompressionprocessing

CapabilitiesWithoutInterruptingUserAccess


NewOnlineCompressAbility– TA24

§ Fullyrestart-ableacrossfailures(lackofspace,MUForLPAR)– Thepartiallycompresseddataremainsaccessible– Oncethefailureissueisresolved,theOnlineCompresswillbe

restartedandruntocompletion

§ Processcanbestopped(REQABORT)– Allowsusertoreverseorchangecompressionsetting– Newprocesswillruntocompletionandresetallrowstonewselection

FullyRestart-ableandRecoverable


NewOnlineCompress– DataBlocks

§ Whendecompressingatable– Rowsmaygrowandadditionaldatablockswillbeused

§ Whencompressingatable– Rowswillshrinkmakingmorespaceavailableineachdatablock– Spaceimmediatelyavailableforusebynewrequests

§ Tocompletetheprocessaonlinereorganizationisrecommended– OLREORGREFGROUP=0providesbestresult(DSOP4/5)

§ Mayrequireadataareaextensionifnotenoughemptyblockstogetrolling

DataBlocksin-useWillbeAffected


ExampleofOnlineCompress

§ Sampletablecontaining1millionrows

§ Uncompresseddatarowsfill62Kdatablocks

§ Aftercompression62Kdatablocksstillinusebuteachblockhassignificantfreespace

§ AfterOLREORGREFGROUP=00datablocksaredefragmented

CometoResourceCenterforaLiveDemo

Before62KFullDataBlocks

AfterTA2462KPartiallyData

Blocks

AfterOLREORG24.5KFullDataBlocks


DBUTLTYDATASPReport(BeforeTA24)ShowsDataBlocks,DataBytesandDataRows“IN-USE”

1Mrowsstoredin98%oftheavailablebytesand99%oftheavailabledatablocksinthe5,250trackdataset

62KDataBlocks


UseDDUPDATEtoUpdateCADatacom®Datadictionary™andTriggerOnlineCompression

Onemillionrowscompressedin2minutes(elapsed)


DBUTLTYDATASPReport(AfterTA24)ShowsDataBytesSignificantlyLess,butDataBlocksandRowstheSame

1Mrowsstoredin39%oftheavailablebytesand99%oftheavailabledatablocksinthe5,250trackdataset

62KPartiallyfullDataBlocks


UseDBUTLTYOnlineReorganizationTo

Onemillionrowsreorganizedanddefragmentedin5minutes(elapsed)


DBUTLTYDATASPReport(AfterTA24/OLREORG)ShowsNumberofBlocksin-useDroppedDramatically(Reducedby60%)

Samenumberofrowsstoredin39%ofthebytesand40%ofthedatablocksinthe5,250trackdataset

24.5KFullDataBlocks


ComparingtheProcessingBefore/AfterTA24+OLREORGSequentialProgramProcessingAll1MRows

Logicalworkisexactlythesame(Requests,LogicalreadsandWrites).

Physicalreadsreducedby64%.


LabBenchmarkComparingCPU/IOConsumptionREAD1MRowsEach- 10ConsecutiveProcesses


Smallbufferpool

Largebufferpool

UncompressedDBCompressPresspackWeakPresspackStrongPresspackCustom


ReducedElapsed,CPUandIOMuchbetterreductionwithlargebufferpools


LabBenchmarkComparingCPU/IOConsumptionREAD1MRowsEach- 10ConsecutiveProcesses

Largebufferpoolw/MRDF



ReducedElapsed,CPUandIOBestreductionwithlargebufferpoolsandMRDFcovered


LabBenchmarkComparingCPU/IOConsumptionUpdate100Kof1MRowsRead- 10ConsecutiveProcesses

Largebufferpool

Largebufferpoolw/MRDF




ReducedElapsed,CPUandIOBestreductionwithlargebufferpoolsandMRDFcovered


Smallbuffers

LargeBuffersw/MRDF

CPU/IOConsumptionWithoutazIIP ProcessorREAD1MRowsEach- 10ConsecutiveProcesses


ReducedIOCPUandElapseddifferencesdependonbufferingBestreductionwithlargebufferpoolsandMRDFcovered


WhatifThereisa3rd PartyCompression

2

MRDFw/Presspack

MRDFw/3rdpartyJOEPACK Donotuse3rd party

compressionandzIIP(SMPTASKx,x,x,SRB )


Summary

§ OnlineCompression(TA24)removesseveralofthekeydrawbacksofcompression– Nolongerrequiresadataaccessoutagetoimplement– Canbeeasilyremovedorchanged– Easilyswitchfrom3rd partyvendortoCA

§ Whencompression(Presspack)combinedwithzIIP(SRB)processing,theTCOtipsinfavorofPresspack (CA)compression– UsescheaperzIIP(CPU)instructionsandsavesDASD,IOandmemory


OneExtraBenefitUncompressedorLightCompressDataisReadable

Uncompressed

DBCompressandPresspackWeak

Readable


OneExtraBenefitStrongandCustomCompressionCanMakeDataUnreadable

PresspackStrong

PresspackCustom

NotReadable


RecommendedSessionsSESSION# TITLE DATE/TIME

MFX92S StrategyandVisionforCADatacomandCAIdeal™ 11/16/2016at12:45pm

MFX93S What’snewinCADatacom 11/16/2016at1:45pm

MFX94S ReducingTCOwithDatacomCompression(Presspack) 11/16/2016at3:00pm

MFX95SA ModernizingtheCADatacomdata – SQLAccessPartI 11/16/2016at3:45pm

MFX95SB ModernizingtheCADatacomdata – SQLAccessPartII 11/16/2016at4:30pm

MFX96S CADatacom/ADInstallation/UpgradeandMaintenance 11/17/2016at12:45pm

MFX97S CADatacom/ADReportUtilization,andinformationgatherforSupport 11/17/2016at1:45pm

MFX98SUsingCASYSVIEW®tomonitorandmeasureyourCADatacomenvironment– ADandDB

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MFX99S BirdsofaFeather/StumptheTechie! 11/17/2016at3:45pm


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reducing tco with datacom compression (presspack)

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