Specifications

Table Of Contents
View Manager Administration Guide
132 VMware, Inc.
Replica2isanexactcopyofParentVM2.Whentherecompositionactioniscomplete
thedesktopwillbeanchoredtoreplica2andtheoperatingsystemdatamodified
accordingly.Theoperatingsystemdataofarecomposeddesktopisreducedinsizeafter
recomposition,howevertheuserdataisunaffected
bythisevent.
Source Virtual Machine
WithVMwareInfrastructure3.5,recompositionisexpeditedbyanadditionalprotected
linkedclonedesktopinVirtualCenterServer,calledasourcevirtualmachine.This
sourcevirtualmachineiscreatedalongsidethereplicawhenalinkedclonedesktop
poolisfirstdeployed.WithVMwareInfrastructure3.5,thesourcevirtualmachineis
locatedwith
thereplicainsideafoldercalledVMwareViewComposerReplicaFolderin
VirtualCenterServer.
Whenarecompositioneventtakesplace,thesourcevirtualmachineisthefirstdesktop
toberecomposedagainstanewsnapshot.ViewComposerremovestheexistinglinked
clonedesktoppoolfromtheVirtualCenterServerandthencopiesthesourcevirtual
machine
asmanytimesasnecessaryinordertoreplaceit.
Thismethodofpoolgenerationoptimizestherecompositionprocessandistypically
muchfasterthanindividuallyrecomposingeachlinkedclonedesktopinthepool.
Desktop Refresh
Adesktoprefreshissimilartoadesktoprecompositionbutwithoutanychangetothe
baseimage.Thisactioniscarriedoutinordertorestorethesystemdataforadesktop
pooltoabaselinestateandtherebyreducethesizeoftheoperatingsystemdataofeach
attachedclone.
Adesktoprefreshcanbecarriedouteitherondemand,asatimedevent,orwhenthe
operatingsystemdatareachesaspecifiedsize.Figure 63illustratestheeffectofthis
action—notethattheuserdatadiskremainsunaffectedbythisevent.
N
OTEVMwarevSphere4optimizescloning,soitdoesnothavetocreatethesource
virtualmachine.
NOTEDesktoprefreshdoesnotapplytothethinlyprovisioneddisksthatcontainuser
data.