双机知识胶片(vcd).ppt

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1、MC/ServiceGuardIntroduction别洪威HP企业客户服务部2001.4.16MC/ServiceGuardConceptsHardwareClusterManagementPackageManagementNetworkTroubleshootingConceptHighAvailabilitySolutionsHardwareConceptsLeadingidea:NoSinglePointOfFailureTheMCinMC/ServiceGuardstandsfor“MultipleComputers”andanMC/ServiceGuardcl

2、usterconsistsofbetween2toupto16nodesdependingontheMC/ServiceGuardversion.HardwareConceptsAsupportedMC/ServiceGuardclusterrequiresredundanthardwareToprotectagainstdiskfailuresLVMdiskmirroringordiskarraysmustbeused;TwodiskbusesarealsostronglyrecommendedandshouldbeeitherconfiguredasPVGroupso

3、rPVlinkstoprotectagainstbusordeviceadapterfailures.AtleasttwoLANinterfacespernodearerequiredtoprotectagainstLANcardfailures.ToallowMC/ServiceGuardtohandleLANfailuresatleastonebridgemustbepresent.SharedVolumeGroupPackageConceptsApplicationResource:VolumeGroupLogicalVolumeFileSystemIPAddres

4、sShellScriptFunctionRule:Resourcegiventoapackagecannotbegiventootherpackages.RelocatableIPAddressStationaryIPStationaryIPaddressesneverchange.ThesearenormalIPaddressesassignedinthesamewayasbefore.RelocatableIPRelocatableIPaddressesareassignedonaper-applicationbasis.Ifyouwanttoaccessanappl

5、ication,youconnecttotherelocatableIPaddresses.Thiswillconnectyou,regardlessofwhichsystemorinterfaceithasbeenassignedto.ClusterConcepts2to16Nodes.Statusandheartbeatsareexchanged.Packagestransferredafterfailure.Noreboot.MajorstepsinapplicationrecoveryafteranodefailureNodefailsClusterreforma

6、tionAdoptivenodetakesoverFsckphaseApplicationstartup&recoveryApplicationavailabilitySimpleoperatorcommandsMovepackagestoalternatenodesPerformhardwareorsoftwareupgrades,maintenanceMovepackagesbackBackwardcompatibility:-OperatingSystem-MC/ServiceGuardPkgEPkgDPkgAPkgGPkgFPkgBPkgIPkgHPkgCHard

7、wareorsoftwareupgrades...PkgEPkgDPkgAPkgGPkgFPkgBPkgIPkgHPkgC...thenrollthroughtheclusterMC/ServiceGuard:MinimizingPlannedDowntimeFastapplicationfailoverLANfailureprotectionNoidlesystemsRotatingStandby/AutomaticFailbackWorkloadbalancingfeaturesManagesplanneddowntim