ESX QE450.2 Spezifikationen PDF herunterladen (Seite 246)

Basic System Administration

246 VMware, Inc.

StorageVMotionhasanumberofusesinadministeringvirtualinfrastructure,

includingthefollowing:

 UpgradingVMwareInfrastructurewithoutvirtualmachinedowntime.Duringan

upgradefromESXServer2.xtoESXServer3.5,youcanmigraterunningvirtual

machinesfromaVMFS2datastoretoaVMFS3datastore,andupgradetheVMFS2

datastorewithoutanyimpactonvirtualmachines.YoucanthenuseStorage

VMotiontomigrate

virtualmachinesbacktotheoriginaldatastorewithoutany

virtualmachinedowntime.

 Storagemaintenanceandreconfiguration.YoucanuseStorageVMotiontomove

virtualmachinesoffofastoragedevicetoallowmaintenanceorreconfigurationof

thestoragedevicewithoutvirtualmachinedowntime.

 Redistributingstorageload.YoucanuseStorageVMotiontoredistributevirtual

machinesorvirtualdiskstodifferentstoragevolumestobalancecapacityor

improveperformance.

Storage VMotion Requirements and Limitations

StorageVMotionissubjecttothefollowingrequirementsandlimitations:

 VirtualmachineswithsnapshotscannotbemigratedusingStorageVMotion.

 Virtualmachinedisksmustbeinpersistentmodeorberawdevicemaps.

 Thehostonwhichthevirtualmachineisrunningmusthavesufficientresourcesto

supporttwoinstancesofthevirtualmachinerunningconcurrentlyforabrieftime.

 ThehostonwhichthevirtualmachineisrunningmusthaveaVMotionlicense,

andbecorrectlyconfiguredforVMotion.

 Thehostonwhichthevirtualmachineisrunningmusthaveaccesstoboththe

sourceandtargetdatastores.

 VMwareInfrastructure3supportsamaximumoffoursimultaneousVMotionor

StorageVMotionaccessestoasingledatastore.AmigrationwithVMotion

involvestwosimultaneousaccessestothedatastore,bythesourceanddestination

hosts.AmigrationwithStorageVMotioninvolvesoneaccesstothesource

datastoreandoneaccessto

thedestinationdatastore.Therefore,ifnoother

migrationsareoccurring,uptofourconcurrentStorageVMotionmigrations

involvingthedatastorecanoccursimultaneously.

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ESX QE450.2 Spezifikationen Seite 246