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1、ArchitectureandConceptsCopyright©2005,Oracle.Allrightsreserved.ObjectivesAftercompletingthislesson,youshouldbeabletodothefollowing:•ListthevariouscomponentsofClusterReadyServices(CRS)andRealApplicationClusters(RAC)•DescribethevarioustypesoffilesusedbyaRACdatabase
2、•Describethevarioustechniquesusedtosharedatabasefilesacrossacluster•DescribethepurposeofusingserviceswithRAC1-2Copyright©2005,Oracle.Allrightsreserved.CompleteIntegratedClusterWare9iRAC10gRACApplicationsApplications/RACSystemManagementServicesframeworkEventServic
3、esClustercontrolClustercontrol/RecoveryAPIsVolumeManagerfilesystemAutomaticStorageManagementMessagingandLockingMessagingandLockingEventServicesManagementAPIsMembershipMembershipConnectivityConnectivityHardware/OSkernelHardware/OSkernel1-3Copyright©2005,Oracle.All
4、rightsreserved.RACSoftwarePrinciplesClusterNode1NodenInstance1InstancenCacheCache…Global…LMONresourcesLMONLMD0LMD0LMSxLMSxLCK0LCK0DIAGDIAGClusterReadyServicesClusterReadyServicesCRSD&RACGIMONClusterCRSD&RACGIMONEVMDinterfaceEVMDOCSSD&OPROCDOCSSD&OPROCDApplication
5、sGlobalApplicationsASM,DB,Services,OCRmanagement:ASM,DB,Services,OCRVIP,ONS,EMD,ListenerSRVCTL,DBCA,EMVIP,ONS,EMD,Listener1-4Copyright©2005,Oracle.Allrightsreserved.RACSoftwareStoragePrinciplesNode1NodenNode1NodenInstance1…InstancenInstance1…InstancenCRShomeCRSho
6、meOraclehomeOraclehomeLocalstorageLocalstorageLocalstorageLocalstorageVotingfileVotingfileOCRfileOCRfileSharedstorageCRShomeOraclehomeSharedstoragePermitsonlinepatchupgradesSoftwarenotasinglepointoffailure1-5Copyright©2005,Oracle.Allrightsreserved.OCRArchitecture
7、Node1Node2Node3OCRcacheOCRcacheOCRcacheOCROCROCRprocessprocessprocessClientClientprocessprocessSharedstorageOCRfile1-6Copyright©2005,Oracle.Allrightsreserved.RACDatabaseStoragePrinciplesNode1Noden…Instance1InstancenArchivedArchivedlogfileslogfilesLocalstorageLoca
8、lstorageDatafilesUndotablespaceUndotablespacefilesforTempfilesfilesforinstance1instancenControlfilesOnlineFlashrecoveryareafilesOnlineredologfilesChangetrackin
