highclusterware

Deliveredby:MatthewZito,ChiefScientist1565thAvenuePenthouseNewYork,NY10010P:646.
452.
4100www.
gridapp.
comYouProbablyDONeedRACYouProbablyDONeedRACIntroductionWhoIAmBasicsofClusteringandRACTheValueofRACRACObjectionsQ&ASettingtheStageWhatisaClusterClusteringTechnologiesOracleRACWhatRACLooksLikeWhatisaClusterAclusterisagroupofserversthatactinconcerttoprovidesomecombinationof:ImprovedreliabilityImprovedscalabilityReducedprocessingcostsClusteringTechnologiesShared-nothing–EachclusternodehasnocommonresourcewithanyothernodeShared-everything–EachclusternodesharesauniversalpoolofcommonresourcesShared-something–Eachclusternodesharessomeresources,butnotothersActive-Passive–OnlyoneclusternodeatatimeisprovidinganygivenserviceOracleRACOracleRACisa"shared-something"clusterRACnodesshare:–Applicationstateawareness(CacheFusion)–Asinglesetofon-diskdata(ASM,OCFS,etc.
)RACprovides–Enhancedreliability–Enhancedscalability–ReducedprocessingcostWhatRACLooksLikeRACObjectionsRACistoocomplicatedRACistooexpensiveCommodityhardwareisn'treliableenoughRACdoesn'tscale"RACistoocomplicated"OlderversionsofRACrequiredthird-partyclusterwareexceptonLinux–In10g,theCRSprovidesaunifiedclusterware–Userscanstillchoosethird-partyclusterwarebasedontheirparticularrequirementsRACisfairlycomplicated–Addsmovingparts–ApplicationscanbehavedifferentlyunderRAC–AddsskillsetrequirementsAutomation&standardizationcanhelp–Makeaddingandremovingnodesseamless–Transparentlymoveprocessingcapacityaroundbetweenclusters–Createstandardizedbuildsthatareeasilydeployable"Commodityhardwareisnotasgoodashigh-endservers"RACmitigatesmost,ifnotall,ofthedownsidesofusinglessreliablehardwareSmallcommodityhardwareislesslikelytosufferfromresourcecontentionthanalargeserverHigh-endserverswereneverthatreliabletobeginwith"RACdoesn'tscale"10gR2RAConLinuxhasbeendemonstratedinalabtoscalelinearlytomorethan10nodesOneofGridApp'scustomersusing10gR1RAChasscaledlinearlywithaproductiontransactionalsystemupto9nodesPrimarilyaleftoverobjectionfromOracle9iRACOtherRACObjections&DownsidesOraclesometimesclaimsthatRACisaseamlessmigration–itisnot–SometimesRACrequiresapplicationtuning,orevenrewritesofcertainfunctionstooptimallytakeadvantageofitsfeatures–Someapplicationssimplydon'trunwellwithRACRACrequiresadditionaltrainingandeducation–ThisiscomparabletothatrequiredforVeritasandotheractive/passiveclusteringsolutionsSoWhyDoIProbablyNeedRACYouprobablyneedRACbecause:CommodityprocessingischeapDowntimeisexpensiveIncrementalscalabilityisahugewinThisiswheretheworldisheadingProcessingisGettingCheaper…01020304050603/15/20007/28/200112/10/20024/23/20049/5/20051/18/2007DateUS$perTPCRun…andServersareGettingSmaller8/23/06–IDCServerShipments–EnterpriseServers(>$500k)–down6.
9%–MidrangeServers($25k-$499k)–down3.
5%–VolumeServers(<$25k)–up6.
2%Organizationsaredramaticallydownsizingtheiraveragedeployedserver,whiledramaticallyincreasingthetotalnumberofserversServerComparison1Sun690032cores,128GBRAM$1,135,0005Dell685040cores,160GBRAM$139,875OracleLicensingComparison32coresUltraSparcIVEnterpriseEdition$1,280,00040coresXeonEE+RAC$1,200,000TotalCostHardware:$1,135,000Oracle:$1,280,000Total:$2,415,000Hardware:$139,875Oracle:$1,200,000Total:$1,339,875IsThisaFairComparisonAren'tXeoncoresslowerthanSuncoresWhataboutabackupserverforthenon-redundantSunWhataboutpower,cooling,rackspaceWhataboutforkliftupgradesReductionofDowntimeWhenanodefailsinanOracleRACcluster,theothernodescontinueprocessingOracleclientscanbeconfiguredtoseamlesslyfailovertosurvivingnodesActive/Passiveclustersaddadditionalcosttothecluster,require2xhardware,increasecomplexity,andcreatedowntimesonfailuresForrester-42%ofcompaniesfoundthatonehourofdowntimecoststhem~$100kIncrementalScalabilityBuyonlywhatyouneedtoday–Noneedtopurchase2xheadroom–Iforiginalconfigurationisn'tfastenough,addmorenodesTakeadvantageofthelatesttechnology–Moore'slawworksforyou,sinceyoucanbuyfasterserversasreleasedandaddthemtothecluster–Incrementallyswapoutolder,slowerhardwareforfasterhardwareWheretheworldisheadedCommodityprocessingisthewayofthefutureGridComputing(therealkind),ishelpingorganizationscreateseamlesspoolsofprocessingpoweroutofserversIncreasingcomplexityinthedatacenterisdrivingcompaniestoreleaseproductsgearedtohelporganizationsstandardize,simplify,andautomatethemanagementofthesecomplexsystemsSomeTipsforDeployingRACDefineafewstandardarchitecturesas"certified"RACbuildsinternally(i.
e.
,2-nodeclusterwithASM,4-nodewithNFS,etc.
)ExpecttoneedtoinvesteffortinapplicationtuningtotakeadvantageofRACGetthesytemsandstorageteamsinvolvedandeducatedonRACTest,test,testGridAppSystemsLeaderinOracleRACmanagementanddatabaseautomationOfferstheworld'sfirstOracleRACappliance–theD2500–Provenreferencearchitecture–AutomationtosimplifyRACdeployment–One-clickscalabilityofRACclusters–FreeRAClicenses–Over100deploymentsHeadquarteredrighthereinNYCSummaryRACoffershugeadvantagesovertraditionalsingle-instanceenvironmentsHowever,RACisnottheseamlesstransitionOraclesometimesclaimsPlan,document,test,andreaptherewardsQ&A