微軟集群知識(shí)講座課件

使用服務(wù)器群集實(shí)現(xiàn)高可用系統(tǒng)(MSCS)

微軟（中國(guó)）有限公司1使用服務(wù)器群集實(shí)現(xiàn)高可用系統(tǒng)(MSCS)1議程為什么使用群集?什么是服務(wù)器群集?Windows2000中的服務(wù)器群集Windows2000特性配置和調(diào)試地理分散的群集（GeographicallyDispersedClusters）存儲(chǔ)區(qū)網(wǎng)絡(luò)（StorageAreaNetworks）Windows.NetServer的新特性支持群集的應(yīng)用軟件Cluster-AwareApplication案例分析2議程為什么使用群集?2為什么使用群集?3為什么使用群集?3現(xiàn)今服務(wù)器的要求任務(wù):完成傳遞商業(yè)的價(jià)值運(yùn)行要求的應(yīng)用&服務(wù)處理可以預(yù)料的負(fù)荷提供適當(dāng)?shù)捻憫?yīng)時(shí)間可擴(kuò)充性:與商業(yè)一起成長(zhǎng)在用戶,數(shù)據(jù),交易上快速增長(zhǎng)在需要時(shí)，應(yīng)付不可預(yù)知的波動(dòng)可用性:按時(shí)完成,不讓用戶等待容忍典型的硬件故障從意外故障重快速恢復(fù)通過定期維護(hù)減少停機(jī)時(shí)間支持災(zāi)難恢復(fù)的工具&技術(shù)設(shè)計(jì)降低成本:與商業(yè)價(jià)值相當(dāng)最初投資的費(fèi)用日常管理的費(fèi)用維護(hù)&升級(jí)的費(fèi)用4現(xiàn)今服務(wù)器的要求任務(wù):完成傳遞商業(yè)的價(jià)值4為什么使用群集?一個(gè)群集是一組計(jì)算機(jī)共同提供一個(gè)應(yīng)用平臺(tái)可擴(kuò)展增加更多的節(jié)點(diǎn)，增加CPU,內(nèi)存,IO和網(wǎng)絡(luò)帶寬高可用多個(gè)計(jì)算機(jī)具有獨(dú)立的故障方式–計(jì)劃中的冗余和意外宕機(jī)管理起來象是一個(gè)計(jì)算機(jī)擴(kuò)展性和可靠性5為什么使用群集?一個(gè)群集是一組計(jì)算機(jī)共同提供一個(gè)應(yīng)用平臺(tái)擴(kuò)展擴(kuò)展性:向上和向外“ScaleUp”DatacenterClassmachines“bigiron”Clusterfor可用性 “ScaleOut”CommodityserversClusterfor擴(kuò)展性and可用性UpOut6擴(kuò)展性:向上和向外“ScaleUp”UpOut6Windows2000群集當(dāng)前三種群集技術(shù)網(wǎng)絡(luò)負(fù)載均衡-NetworkLoadBalancing目標(biāo):32-各節(jié)點(diǎn)IP通訊負(fù)載均衡，通過一組同樣的服務(wù)器好處:擴(kuò)展性,可用性組件負(fù)載均衡-ComponentLoadBalancing目標(biāo):8個(gè)節(jié)點(diǎn)COM組件動(dòng)態(tài)負(fù)載均衡，通過一組同樣的服務(wù)器好處:擴(kuò)展性,可用性服務(wù)器群集-服務(wù)器群集目標(biāo):支持長(zhǎng)時(shí)間運(yùn)行的應(yīng)用的故障轉(zhuǎn)移好處:可用性,擴(kuò)展性（對(duì)于一些應(yīng)用）7Windows2000群集當(dāng)前三種群集技術(shù)7Clients多種群集在一起工作IISWebServerorotherIPbasedservicesNetworkLoadBalancing12323…4COM+ComponentsComponentLoadBalancing*ApplicationServers128…3*=ComponentLoadBalancingisdeliveredthroughtheApplicationCenter2000product.DataServersSQL,Exchange,File

ServerCluster12348Clients多種群集在一起工作IISWebServer什么是服務(wù)器群集?9什么是服務(wù)器群集?9什么是服務(wù)器群集?

(AkaMSCSandWolfpack)提供故障轉(zhuǎn)移和健康監(jiān)視支持，對(duì)于長(zhǎng)時(shí)間運(yùn)行和狀態(tài)連續(xù)的應(yīng)用應(yīng)用安裝在群集中所有節(jié)點(diǎn)上要求共享存儲(chǔ)的架構(gòu)當(dāng)應(yīng)用在群集的節(jié)點(diǎn)間故障轉(zhuǎn)移時(shí)仍能訪問相同的數(shù)據(jù)集所有節(jié)點(diǎn)必須在相同的域和IP子網(wǎng)中由群集來監(jiān)視節(jié)點(diǎn)和應(yīng)用的運(yùn)行情況節(jié)點(diǎn)監(jiān)視通過群集內(nèi)的心跳線（heartbeats）應(yīng)用監(jiān)視通過應(yīng)用特殊的“plug-ins”或“resourcedlls”所有節(jié)點(diǎn)應(yīng)該至少有2塊網(wǎng)卡1NIC用于群集心跳線，1NIC用于客戶端訪問10什么是服務(wù)器群集?

(AkaMSCSandWolfpa微軟群集服務(wù)

Active-PassiveConfigurationSecondaryClientDataSCSISharedDisk\\VirtualServerPrimary11微軟群集服務(wù)

Active-PassiveConfigur微軟群集服務(wù)

Active-ActiveConfigurationClients\\VirtualServer2Data

Partition

1Data

Partition

2Primary\\VirtualServer1Secondary\\VirtualServer2Primary\\VirtualServer2Secondary\\VirtualServer1\\VirtualServer112微軟群集服務(wù)

Active-ActiveConfigura微軟群集服務(wù)

ClusterServiceinActionClientsData

Partition

1Data

Partition

2Heartbeat\\VirtualServer1\\VirtualServer2\\VirtualServer1\\VirtualServer213微軟群集服務(wù)

ClusterServiceinActi微軟群集服務(wù)

ClusterServiceinActionClientsData

Partition

1Data

Partition

2\\VirtualServer1\\VirtualServer2\\VirtualServer1\\VirtualServer214微軟群集服務(wù)

ClusterServiceinActi服務(wù)器群集SCSI配置

(2nodeonly)ClientPCsPublicnetworkPrivatenetwork(heartbeats,status,control)RAIDdisksetsSCSIServerClusterNodesTIP:MakesurehostadaptershavedifferentSCSIIds(Factorydefaultisusually7)ExternalSCSIBusTermination15服務(wù)器群集SCSI配置

(2nodeonly)Cli服務(wù)器群集光纖通道配置ClientPCsPublicNetworkPrivatenetworkRAIDdisksetsServerCluster

nodesRedundantfiberchannelfabricsDual-pathHBAdriversforfaulttolerantaccesstostorage16服務(wù)器群集光纖通道配置ClientPCsPublicNe不同的群集視角網(wǎng)絡(luò)客戶看到的是一個(gè)或多個(gè)“虛擬的”服務(wù)器每個(gè)虛擬服務(wù)器擁有一個(gè)名稱,IP地址每個(gè)提供一組服務(wù)–e.g.數(shù)據(jù)庫(kù),文件&打印共享每個(gè)虛擬服務(wù)器由一個(gè)群集的節(jié)點(diǎn)托管每個(gè)節(jié)點(diǎn)可以托管多個(gè)虛擬服務(wù)器如果托管的節(jié)點(diǎn)失效,它的虛擬服務(wù)器轉(zhuǎn)移到其他的可用的節(jié)點(diǎn)上用戶端繼續(xù)使用同樣的IP地址和網(wǎng)絡(luò)名稱去訪問應(yīng)用或服務(wù)17不同的群集視角網(wǎng)絡(luò)客戶看到的是一個(gè)或多個(gè)“虛擬的”服務(wù)器ClusternameNodenameNodenameVirtualservernameVirtualservernameVirtualservernameVirtualservername服務(wù)器群集命名空間

物理上命名空間18ClusternameNodenameNodenameNode1Node2Virtualserver1Virtualserver2Virtualserver3IPaddress:Networkname:NTSENode1IPaddress:Networkname:NTSENode2IPaddress:Networkname:NTSE-VS1IPaddress:Networkname:NTSE-VS2IPaddress:Networkname:NTSE-VS3InternetInformationServerSQLMTSMSMQMicrosoftExchange服務(wù)器群集命名空間

邏輯上命名空間19Node1Node2VirtualVirtualVirt額外的可用性技巧共同故障的容錯(cuò)RAIDdisks雙重電源,雙重風(fēng)扇,多塊網(wǎng)卡,etc.嚴(yán)格的操作程序備份&恢復(fù)實(shí)踐配置標(biāo)準(zhǔn)化&改變控制警報(bào),事變管理運(yùn)行中的容量監(jiān)視和計(jì)劃災(zāi)難恢復(fù)計(jì)劃Off-site數(shù)據(jù)存儲(chǔ)災(zāi)難響應(yīng)計(jì)劃&排練租借或特有的災(zāi)難恢復(fù)站點(diǎn)數(shù)據(jù)管理(e.g.,backups,real-timemirroring)環(huán)境管理(e.g.,applicationlicenses)網(wǎng)絡(luò)管理(e.g.,subnetreplicationservices)20額外的可用性技巧共同故障的容錯(cuò)20Windows2000

新特性21Windows2000

新特性21Windows2000增強(qiáng)的特性

部署簡(jiǎn)化群集部署SimplifiedsetupwizardSetupfromwithAdd/RemoveProgramsappletScripted,unattendedsetup(usingUnattend.txt)CanuseSYSPREPwithscriptedclustersetupStep-by-stepinstallationguideWindows2000DeploymentGuide,Chapter18RollingupgradesupportfromNT44-節(jié)點(diǎn)群集-Windows2000DatacenterSurvivedouble&tripleserverlossesLowercostofexcesscapacity(N+Ipossible)Moreworkloadflexibilityforserverconsolidation更多的操作系統(tǒng)特性支持高可用DHCP,WINS,DFS,NNTP,SMTP22Windows2000增強(qiáng)的特性

部署簡(jiǎn)化群集部署22Windows2000增強(qiáng)的特性

群集管理更容易的群集管理ClusteradminconsoleaccessedfromComputerManagementMMCsnap-inApplicationWizardforSimplifiedVirtualServerConfigurationCLUSTERcommandlineutilityExpandedonlinedocumentation遠(yuǎn)程&分布式群集管理AdministrationviaTerminalServicesScriptedadministration(KBarticleQ245656)ClusteradminGUIinWindows2000AdminpakCLUSTERcommandforremotable,command-linemanagement23Windows2000增強(qiáng)的特性

群集管理更容易的群集管高可用性特性BaseserverreliabilityimprovementsPlug-and-playclusterdisks&networkinterfacesNetworkfailuredetectionandrecoveryDetectsunavailablepublicNetworksClusterconfigurationbackup/recoveryAPIsReducedpotentialchkdskdelaysonstart-upFasterchkdsk;Propertiestocontrolwhenchkdskruns(KBarticleQ223023)PrintingEnhancementsSupportforCryptokeyexport/importWindows2000增強(qiáng)的特性

高可用性24高可用性特性Windows2000增強(qiáng)的特性

高可用性2應(yīng)用部署更簡(jiǎn)單Clustersupportrequirements&guidelinesinWindows2000LogospecificationClusterAPIsavailabletoprogrammersononeveryplatformCOM支持(forscriptingetc.)MSCLUSCOMInterfacetoCLUSAPI群集日志增強(qiáng)

(KBarticleQ234767)Enabledbydefaultwithsizecontrol&wraparoundLogentriesfullytime/datestampedWindows2000增強(qiáng)的特性

應(yīng)用開發(fā)和群集調(diào)試25應(yīng)用部署更簡(jiǎn)單Windows2000增強(qiáng)的特性

應(yīng)用開發(fā)轉(zhuǎn)動(dòng)式升級(jí)UpgradeResource2Resource1Resource21Resource1Resource23Resource12Resource1Resource24Upgrade26轉(zhuǎn)動(dòng)式升級(jí)UpgradeResource2Resource1Windows2000

部署和調(diào)試技巧27Windows2000

部署和調(diào)試技巧27部署的最佳實(shí)踐

General只有在HCL中被認(rèn)可的配置Buildingclustersfrompartsmaynotwork機(jī)器容量必須足以承受所有失敗的情況Ina2nodecluster,tosurviveasinglefailurewithnodegradation,eachnodemustbeconfiguredtorunat50%Thoroughperformancetestingshouldbedonebeforedeploymenttoensurethatperformancedegradationwillnotoccur28部署的最佳實(shí)踐

General只有在HCL中被認(rèn)可的配置部署的最佳實(shí)踐

Storage存儲(chǔ)架構(gòu)是許多群集問題的根源共享存儲(chǔ)要求不能有任何磁盤與Boot/system/pagefile在同一條總線上SCSI只支持2節(jié)點(diǎn)EnsurealldeviceshaveuniqueIdshostadapterstypicallyshipasId7EnsurecorrectSCSIterminationExternalterminationusing“Y”connectorallowsmachinestobepowereddown光纖通道Ensuremultiple,independentpathstostorageMultipleHBAswithmulti-pathdevicedriversEnsureallHBAsatsamefirmwarerevision29部署的最佳實(shí)踐

Storage存儲(chǔ)架構(gòu)是許多群集問題的根源2部署的最佳實(shí)踐

Networks內(nèi)部網(wǎng)和外部網(wǎng)Atleast2NICspermachineOneNICdedicatedtoprivateandoneNICforbothprivateandpublic(PCINICsonly)確保所有相關(guān)的網(wǎng)卡都在相同的子網(wǎng)上MUSTonlybe1NICpersubnetSwitches/routers需要支持arpcacheflushprotocol可用性-WINS,DNS,DHCPservers必須是靜態(tài)IPaddresses,DHCP不支持NETBIOSisrequiredforCluAdmin30部署的最佳實(shí)踐

Networks內(nèi)部網(wǎng)和外部網(wǎng)30所有節(jié)點(diǎn)在相同的域中只能使用域帳號(hào)在虛擬服務(wù)器的應(yīng)用使用NTLM驗(yàn)證KerberosauthenticationonWindows.NetServerKerberoswillalsobeavailableonWindows2000SP3(DCRbeingtested)確保域架構(gòu)高可用在Windows2000建議群集節(jié)點(diǎn)使用成員服務(wù)器而不是域控制器(Q281662)部署的最佳實(shí)踐

SecurityandDomainInfrastructure31所有節(jié)點(diǎn)在相同的域中部署的最佳實(shí)踐

Securityand排錯(cuò)工具EventViewerFailuresloggedineventlogEventlogentriesarereplicatedtoallnodesinthecluster(lazyreplication)Windows.NetServerlogssuccessfulgroupmoves,whichallowsforauditingofadminoperationsClusterLogEnabledbydefaultstartinginWindows2000ClusLogtoolavailableforaggregatingmultiplelogsintoasingleviewClusDiagNewtoolbeingdevelopedforWindows2000andWindows.NetServertovalidateclusterconfigurations32排錯(cuò)工具EventViewer32Quorum排錯(cuò)NT4.0–Q172951HowtoRecoverfromaCorruptedQuorumLogStartusing/noquorumloggingoptionRunchkdskDelete\MSCS\Quolog.log,\MSCS\*.tmpStop,restartserviceWindows2000–Q245762RecoveringfromaLostorCorruptedQuorumLogStartusing/resetquorumlogoptionIfnecessaryrestoreusing“ClusRest”toolAvoidstabilityissuesbyincreasinglogsizeto4096KBThisisthedefaultsizeonWindows.NetServer33Quorum排錯(cuò)NT4.0–Q172951Howt硬盤替換NT4.0–FTEdit.exeandRegistrymanipulationQ243195EventID1034forMSCSSharedDiskAfterDiskReplacementWindows2000-Dumpcfg.exetochangedisksignatureQ224075DiskReplacementforWindows2000ServerClusterWindows.NetServer–ASR,ConfDisk.exeQ287556HowtouseASRtoRecoveraServerClusterNodeQ280425RecoveringfromanEventID1034onaServerClusterConfDisk.exereplacesDumpCfg.exe34硬盤替換NT4.0–FTEdit.exeandRe備份和恢復(fù)NT4–ManualBackup/RestoreWindows2000–AddedbackupAPI’sEnabledSystemStatebackup’s.RestoresviaClusRest.exeQ248998HowtoProperlyRestoreClusterInformationWindows.NetServer–FullSupportBackup/RestorefullsupportviaNTBackup.exewiththeSystemStateRestoretoallnodesintheClusterAutomaticSystemRecovery(ASR)torecoveraClusternodeQ287556HowtouseASRtoRecoveraServerClusterNodeQ286422HowtoBackup/RestoreaServerClusterunderWindows.NetServer35備份和恢復(fù)NT4–ManualBackup/Resto動(dòng)態(tài)磁盤服務(wù)器群集不支持動(dòng)態(tài)共享盤VeritashasaVolumeManagerforWindows2000productthatsupportsDynamicDisksforSharedDisksSoftwareFTSetsonClusteredDisksDynamicallychangeshareddisksizeALLsupportforclustersrunningVeritasVolumeManagershouldbereferredtoVeritasdirectlyQ237853DynamicDiskConfigurationUnavailableforServerClusterDisks

36動(dòng)態(tài)磁盤服務(wù)器群集不支持動(dòng)態(tài)共享盤36Windows2000

地理分散的群集-GeographicallyDispersedClusters

(akamulti-siteclusters)37Windows2000

地理分散的群集-Geographi地理分散的群集服務(wù)器群集支持群集的節(jié)點(diǎn)可以分布在不同的地理位置Limitedto2sitedeploymentsininitialreleaseWindows2000AdvancedServerandDatacenterServer2nodeAS/2and4nodeDatacenterNewHCLcategoriesspecifictomulti-siteconfigurationsCertifiedconfigurationincludeshardwareplussoftware一些警告….38地理分散的群集服務(wù)器群集支持群集的節(jié)點(diǎn)可以分布在不同的地理位…thegood,badandugly所有群集節(jié)點(diǎn)必須在相同的子網(wǎng)上RequiresVLAN-liketechnologyacrosssites站點(diǎn)之間的網(wǎng)絡(luò)反應(yīng)時(shí)間必須保證小于500msLatencytoolavailabletoqualifyinter-sitelinkswhendeployedatcustomersites存儲(chǔ)數(shù)據(jù)必須在站點(diǎn)間鏡像

Storagesolutionsprovidedbydifferentvendors(OEMs,IHVandISVs)QuorumdiskMUSTbesynchronouslyreplicatedacrossthesitesDatadisksSHOULDbesynchronouslyreplicatedtoensurecrosssiteconsistency39…thegood,badandugly所有群集節(jié)點(diǎn)必地理分散的群集VLANSANLatency<=500MSVirtualLAN’sAppearas1NetworktoClusterMinneapolisVLANChicago01001140地理分散的群集VLANSANLatency<=500MSystemASiteASiteB

Upto100kmPathAPathBFCswitchHSG80RAIDControllerHSG80RAIDControllerFCswitchSystemBFCswitchHSG80RAIDControllerHSG80RAIDControllerFCswitchonewayotherway地理分散服務(wù)器群集SAN1SAN2R/WRR/WRVLAN41SystemSiteASiWindows2000

StorageAreaNetworkDeployments42Windows2000

StorageAreaNetw群集和SAN支持多個(gè)群集可配屬到相同的存儲(chǔ)結(jié)構(gòu)上存儲(chǔ)設(shè)備必須在Multi-clusterdeviceHCLServer+Fabric+Storage必須是作為一個(gè)完成的方案在群集的HCL目前沒有針對(duì)fabricswitches認(rèn)證過程Windows2000服務(wù)器群集支持存儲(chǔ)區(qū)網(wǎng)絡(luò)ClusterClusterClusterJBODStorageArraySANFabric43群集和SAN支持多個(gè)群集可配屬到相同的存儲(chǔ)結(jié)構(gòu)上Wind配置SANs使用區(qū)域劃分隔離每個(gè)群集Putclusternodesandclustershareddevicesintoclusterspecificzones

Diskarbitrationuses“busreset”Cluster3Cluster2Cluster1JBODCluster1ZoneCluster2ZoneCluster3ZoneStorageArray44配置SANs使用區(qū)域劃分隔離每個(gè)群集Cluster3ClWindows.NetServer

NewFeaturescomingsoon45Windows.NetServer

NewFeaturWindows.NetServerHighlights群集配置向?qū)implifiedclustersetupandconfiguration“GenericScript”resourcetypeNewresourcetypetoallowexistingapplicationstobemadecluster-awareusingVBScriptorJScript更大的群集4nodesinAdvancedServer8nodesinDatacenterWMI支持管理和事件ActiveDirectory集成End-to-endKerberosauthenticationanddelegation46Windows.NetServerHighlights額外的特性概要

(1of2)RollingupgradeNT4toWindows2000toWindowsXPClusteraccountpasswordutilityChangeclusterserviceaccountpasswordwithouttakingdowntheclusterEnhancedSANsupportTargetedresetofstoragedevicesratherthanfullbusreset-requiressupportedbyHBAdevicedrivers“Singlestoragebus”supportFilesystemenhancementsPhysicaldiskresourcesnolongerrequiredrivelettersMountpointssupportedinacluster(support>23disks)Client-sidecachingforclusteredSMBsharesMultipleDFSrootsinacluster47額外的特性概要

(1of2)Rollingupgrad額外的特性概要

(2of2)PrinterdriversreplicatedtoallclusternodesSimplifiedconfigurationofMSDTCCreateanMSDTCresource–nomoreCOMCLUSTAutomaticServerRecovery(ASR)supportRestoresdisksignaturesforalldisk(includingshareddisks)RebuildsasinglenodeincludingclusterregistrystateCanbeusedtorebuildacompletecluster(includingquorumdisk)TerminalServerand服務(wù)器群集canco-existonsamenodes(Note:NOfailoverofTSsessions)“MajorityNodeSet”quorumresourceResourceDllenhancementsSupportforrollingupgradewithoutshuttingdowntheclusterNotificationofterminateorofflinereasonSupportforgroupaffinity48額外的特性概要

(2of2)Printerdriver群集拓?fù)浣Y(jié)構(gòu)OperatingSystem#ofNodesStorageInterconnectAdvancedServer(x86)2SCSIorFibreAdvancedServer(x86)>2nodesFibreChannelDatacenter(x86)2–8FibreChannelAdvancedServer(ia64)2–4FibreChannelDatacenterServer(ia64)2–8FibreChannel4nodesinAdvancedServer8nodesinDatacenterFullyfunctionalclustersupportforia6449群集拓?fù)浣Y(jié)構(gòu)OperatingSystem#ofNod3步群集配置AnalyzingtheconfigurationShowtheproposedconfigurationMakethechanges503步群集配置Analyzingtheconfigura支持群集的應(yīng)用軟件

Cluster-AwareApplication51支持群集的應(yīng)用軟件

Cluster-AwareApplicAFailoverCluster–2NodeVirtualSQLServer(s)PrivateNetworkPublicNetwork(s)Node1Node252AFailoverCluster–2NodeVirAFailoverCluster–4Node53AFailoverCluster–4Node53SQL中數(shù)據(jù)分區(qū)ClientUser(View)ServerAUsersAF(Table)ServerBUsersGZ(Table)CREATETABLEUsersAF((UserNameVarChar(50)NOTNULLPRIMARYKEYCHECK(UserName<=‘F’),EmailVarChar(50),FirstNameVarChar(20),LastNameVarChar(30))CREATETABLEUsersGZ((UserNameVarChar(50)NOTNULLPRIMARYKEYCHECK(UserName<=‘G’),EmailVarChar(50),FirstNameVarChar(20),LastNameVarChar(30))CREATEVIEWUsersASSELECT*FROMDemodb.dbo.UsersAFUNIONALLSELECT*FROMServerB.DemoDB.dbo.UsersGZCREATEVIEWUsersASSELECT*FROMDemodb.dbo.UsersGZUNIONALLSELECT*FROMServerA.DemoDB.dbo.UsersAF

DTCneedstoberunningonbothmachinesNeedtosetXACT_ABORTon(executeSETXACT_ABORTON)ReadorUpdate54SQL中數(shù)據(jù)分區(qū)ClientUserServerAUserExchange5.5群集Active/passiveNotcluster-AwareGenericResourceDLL LowROISystemfilesonlocaldriveSystemfilesonlocaldriveClientPCsNodeANodeBDataandexecutablefilesonsharedclusterdrives55Exchange5.5群集Active/passivExchange2000群集Active/ActiveVirtualServerconceptNodessupported:2Nodes@RTM4NodeslaterwithDataCenter4StorageGrouplimitation56Exchange2000群集Active/ActiveExchangeClusterGroupsExchangeVirtualServer(EVS)MultipleEVSspernodeFinestgranularityforfailover1ormoreSGsExchangeVirtualServerIPAddressNetworkNameSharedStorageExchangeResources57ExchangeClusterGroupsExchangActive/ActiveExchangeMAPIEVS1StorageGroup1

EVS2

EVS3StorageGroup2StorageGroup3IMAPIP2POPHTTPSMTPIMAPIP3POPHTTPSMTPName1Name2Name3StoreIISIMAPIP1POPHTTPSMTP58Active/ActiveExchangeMAPIEVS1ClientExperienceEVS2EVS1EVS1XHTTP,POP,IMAP,MAPI59ClientExperienceEVS2EVS1EVS1XExchange群集Exchange5.5vs.Exchange2000ClusterAPIsActive/Passivevs.Active/ActiveExchange2000Co