zdlra ha backup recovery - oracle...daily rman backup operations when the upstream recovery...

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ZDLRAHighAvailabilityforBackupandRecovery

OracleServerTechnologyHighAvailabilitySystemsDevelopmentMaximumAvailabilityArchitectureSeptember2018


SafeHarborStatementThefollowingisintendedtooutlineourgeneralproductdirection.Itisintendedforinformationpurposesonly,andmaynotbeincorporatedintoanycontract.Itisnotacommitmenttodeliveranymaterial,code,orfunctionality,andshouldnotberelieduponinmakingpurchasingdecisions.Thedevelopment,release,andtimingofanyfeaturesorfunctionalitydescribedforOracle’sproductsremainsatthesolediscretionofOracle.

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ProgramAgenda

Solutionoverview

Requirements

SetupandConfiguration

Operations

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Reliable&CompleteRecovery

EliminateLongBackupWindows

End-to-EndDataProtection

Control&Monitoring

Scale-OutHardware&Storage

ContinuallyValidatesRecoveryStatus

EngineeredDataProtectionForCompleteRecoverabilityoftheOracleDatabase

ZeroDataLossRecoveryAppliance

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ArchiveBackuptoCloudStorage


ZDLRAHAforBackup&RecoveryMAAConfiguration

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• TheOracleMaximumAvailabilityArchitecture(MAA)bestpracticetoprotecttheZDLRAagainstsitedisastersandsystemoutagesistohaveaZDLRAreplica.

• WithaZDLRAreplica,protecteddatabasebackup,redo,andrestoreoperationscontinue,preservingcompletedataprotection.

• ThispresentationwilladdresshowtoconfigureprotecteddatabasefailovertoadownstreamZDLRAwhentheupstreamRecoveryApplianceisunavailableduetounplannedorplannedoutages.

• ThefocusisonRMANbackupandredooperations.Afterconfiguration,noclient-sidechangesarerequiredforthedailyRMANbackupoperationswhentheupstreamRecoveryAppliancehasplannedorunplannedoutages.

• Forthedetailedconfigurationsteps,refertoMyOracleSupportnote:ConfiguringHighAvailabilityZDLRAClientforBackupandRestore(DocID2432144.1)


SolutionOverview

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Thispresentationprovidesthestepsrequiredtoconfigureaprotecteddatabasefortransparentfailoverofbackupoperations and–whenused- redotransporttoadownstreamRecoveryAppliance. Thefollowingisassumed:

1. Realtimeredotransportisenabled.DuringtheoutageoftheupstreamZDLRA,theredotransportwillfailovertodownstreamZDLRA

2. Theprotecteddatabasesusedinthesubsequentexamplesare12.1(CDB121DR)and12.2(CDB122DR)containerdatabaseswithonepluggabledatabaseeach.

3. AnupstreamRecoveryAppliance(RAHADR1)

4. AdownstreamRecoveryAppliance(RAHADR2)

5. AcommonVPCusercalledHADR_COMMON_VPCUSERwascreatedonbothRecoveryAppliancesandmust usethesamepasswordonboth.

6. AlocalVPCusercalledHADR_LOCAL_VPCUSERcreatedonbothRecoveryAppliancesbutthepasswordcanbedifferentbetweenthetwo.

7. AreplicationserverbetweenRAHADR1andRAHADR2isusingtheVPCuserREPUSER_FROM_HADR1


ProgramAgenda

Solutionoverview

Requirements


Operations

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Requirements

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UpstreamRecoveryApplianceRelease:12.2.1.1.1.201805-RELEASEorlater

DownstreamRecoveryApplianceRelease:12.2.1.1.1.201805-RELEASEorlater

RDBMS12.1.0.2.171017orlater+One-OffPatch25926338

RDBMS12.2.0.1.180116orlater+One-OffPatch27757888

EnterpriseManager13Release2(EM13.2.2.0.180430)orlater

- OR-


ProgramAgenda

Solutionoverview

Requirements


Operations

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SetupandConfiguration(ZDLRA)- VPCUsersCreation

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Oneach ZDLRA(RAHADR1andRAHADR2),createtwoVPCusersfortheprotecteddatabase

Onthedownstream ZDLRA(RAHADR2),createtheVPCusertobeusedbythereplicationserverRAHADR1 RAHADR2


SetupandConfiguration(ProtectedDatabase)- tnsnames.ora

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Ontheprotecteddatabaseandoneachdatabaseserver(ifitisRACconfigured)updatethetnsnames.oraundertheoracledatabasehome.

IMPORTANT:Ifra_install.jarwasusedontheprotecteddatabase,ensurethatthereareno${ORACLE_HOME}/dbs/ra${ORACLE_SID}.ora filesonanyofthedatabaseservers.Thepresenceofthisfilehastheeffectofoverridingalltheconfigurationparametersdefinedfurther.


SetupandConfiguration(ZDLRA)- ReplicationServercreation

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OntheUpstreamZDLRA:1. Createareplicationwalletifitdoesnotexist2. AddtheVPCreplicationcredentialstothereplicationwallet3. Createthereplicationserver

RAHADR1 RAHADR2


SetupandConfiguration(ZDLRA)- ProtectedDatabaseEnrollment

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OntheUpstreamZDLRA:1. Createaprotectionpolicytobeusedbytheprotecteddatabase2. AddtheprotecteddatabasetotheZDLRA3. GrantthedatabaseaccesstotheVPCuser

RAHADR1 RAHADR2OntheDownstreamZDLRA:1. Createaprotectionpolicytobeusedbytheprotecteddatabase2. AddtheprotecteddatabasetotheZDLRA3. GrantthedatabaseaccesstotheVPCuser

OntheUpstreamZDLRA:1. Addtheprotectionpolicytothereplicationserver


SetupandConfiguration(ProtectedDatabase)- Registration

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OntheProtectedDatabase:1. Configurethesqlnet.orafilethatwillbeusedbyRMAN

toconnecttothecorrectRecoveryAppliance– iftheprotecteddatabaseisRAC,thisshouldbedoneonallnodes.

2. Createauto-loginwallettostorethetheVPCuserscredentials.

3. CreatecredentialaliasesforeachofthethreecredentialsthatwillbeusedbyRMAN.

4. Verifythatthecredentialsareworkingcorrectly5. RegistertheprotecteddatabasewithRMANinthe

UpstreamZDLRA6. Performatestbackupofthecurrentcontrolfile.7. Listthebackupyoujustcreatedtoverifyitisavailable

onbothUpstreamandDownstreamZDLRA.


SetupandConfiguration(ZDLRA)– AddRemainingGrants

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OntheUpstreamZDLRA(RAHADR1):1. Addthegrantaccesstothe

remainingVPCuser(HADR_COMMON_VPCUSER).

RAHADR1 RAHADR2OntheDownstreamZDLRA(RAHADR2):1. Addthegrantaccesstothetworemaining

VPCusers(HADR_LOCAL_VPCUSERandHADR_COMMON_VPCUSER)

Fromtheprotecteddatabase:1. Verifythatthecredentialsareworkingcorrectly.


SetupandConfiguration(ProtectedDatabase)RMANconfiguration

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Ontheprotecteddatabase:1. ConfiguretheSBT_TAPEchanneldeviceparameters

forusewiththeDR_RAHADRalias.2. Optionallyconfigureadditionalparameters,whichare

bestpracticerecommendations.


SetupandConfiguration(ProtectedDatabase)Real-TimeRedoTransport configuration

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Real-TimeRedoTransportforprotecteddatabasescanbeconfiguredtousetheupstreamRAwhenavailable,andifnot,failovertousethedownstream RA.WhentheupstreamRAbecomesavailableagain,redotransportwillautomaticallyusetheupstreamRA.

Startbyconfiguringtheredo_transport_user andthenchooseeitheroftheoptionsbelow.1. DataGuardBrokercanbeusedtomanagethesettings2. Init.oralog_archive_dest parameters


SetupandConfiguration(ProtectedDatabase)Real-TimeRedoTransport configuration(Option1)

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ConfiguringReal-TimeRedoTransportusingDataGuardBroker

Important:Important:IfRedoTransportdoesnotstart,attempttorestartdatabaseinstancetoregisterandenablenewwalletconfiguration.ForaRACconfiguration,yourestartoneRACinstanceatatimeinarollingfashiontomaintaindatabaseserviceuptime.


SetupandConfiguration(ProtectedDatabase)Real-TimeRedoTransport configuration(Option2)

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ConfiguringReal-TimeRedoTransportmanually

Important:IfRedoShippingdoesnotstart,thenyoumayneedtobouncetheprotecteddatabase.ForaRACdatabase,thiscanbedoneinarollingfashion.


ProgramAgenda

Solutionoverview

Requirements


Operations

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Operations(ProtectedDatabase)– CreateRMANbackupscripts

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Ontheprotecteddatabase:1. Ononeofthehosts,createthe

backup_database_rahadr1.rman textfile.2. Ononeofthehosts,createthe

backup_database_rahadr2.rman textfile.3. LoadtheHADR1scriptintotheRAHADR1

RecoveryAppliance.4. LoadtheHADR2scriptintotheRAHADR2

RecoveryAppliance.5. VerifytheRMANaccesstothescriptusing

theVPCcredentials.


Operations(ProtectedDatabase)– PerformingBackups

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Ontheprotecteddatabase:1. ThefollowingRMANcommandshouldbeused

forallRMANbackupoperations


Operations(ZDLRA)– BackupPieceGapResolution

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• Incaseofafailover,thebackupprocess istransparenttotheprotecteddatabase.

• Whentheupstream(RAHADR1)becomesavailableagain,thebackupsthathadfailedovertodownstream(RAHADR2)needtobetransferredbacktoRAHADR1toresolvethegapofvirtualfullbackups.

• ThegaptoberesolvedwillshowasINDEX_BACKUPtasksinORDERING_WAITstateonRAHADR1,asthevirtualfullbackupmetadataispresent(vianormalcatalogreconcilewithRAHADR2configuredasdownstream)butarenotyetphysicallypresentontheappliance.

• Todothis,aPL/SQLscriptwascreatedtolookforINDEX_BACKUPtasksthatareinanORDERING_WAITstateandwillthendeterminewhichbackuppiecesneedtobetransferredtoRAHADR1fromRAHADR2.Itwillthentransferthesepiecesinparallel(ifpossible)backtoRAHADR1usingtheDBMS_RA.POPULATE_BACKUP_PIECEAPI.

• ThescriptfirstloadstheRA_POPULATE_BACKUP_PIECEprocedureintothedatabase,andthencreatesaDBMS_SCHEDULER_JOBthatrunsevery15minutestoseeifthereareanypiecesthatneedtobetransferred.Theinitialqueryisveryquickbutifpiecesarefound,thenthejobwillrunforanextendedperiodoftimeduetotheINDEX_BACKUPtasksthatarecreatedonRAHADR1asaresultoftheDBMS_RA.POPULATE_BACKUP_PIECEcalls.Thescripttobeusedistkrmrshadr.sql.


Operations(ZDLRA)– BackupPieceGapResolution(Cont.)

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Note:ForcustomersonversionsearlierthanZDLRA12.2.1.1.2-201810-RELEASE,multi-sectionbackupsarenotsupportedbyDBMS_RA.POPULATE_BACKUP_PIECE.

Formulti-sectionbackups,theDBtracefilewithapatternof*pdb_<timestamp>.trc willcontainalistofBACKUPFROMSCNcommandstobeexecutedontheprotecteddatabase(CDB122DR)totheupstreamRA(RAHADR1)toresolvethebackupgap.

AnExampleofthe*pbp_<timestamp>.trc fileshowing6differentfilesthataremulti-sectionbackupsisasfollows:

Note:ForcustomersonZDLRAVersion12.2.1.1.2-201810-RELEASEorlater,theaboverestrictiondoesnotapply,i.e.POPULATE_BACKUP_PIECEsupportsmulti-sectionbackups.Ensurethatthelatesttkrmrshadr.sql scriptisdownloadedfromMOSNote2432144.1and executed onall Recovery Appliances.

zdlra ha backup recovery - oracle...daily rman backup operations when the upstream recovery...

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