Q-See Remote Client Software V 4.0.1 Spécifications télécharger pdf (Page 130)

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130 VMware, Inc.

Becausethedeltadisksforeachdesktopwillinevitablygrowovertime,duringlinked

clonedeploymentyoucandefinethemaximumallowablesizeofeachvirtualmachine,

uptotheoriginalsizeoftheParentVM.Theamountofdiskspacerequiredtostorethe

differencebetweenthelinkedcloneoperating

systemdataandParentVMoperating

systemdatawilltypicallyremainfarsmallerthanthatrequiredbyastandardclone.If

thesizeofthedeltadiskgetstoolargeitcanbereturnedtoitsbaselinestatebycarrying

outadesktoprefresh.

Thin Provisioning

Operatingsystemdatadisksanduserdatadisksuseaprocesscalledthinprovisioning

inordertominimizestoragecosts.Disksthatemploythisprocessoccupynomore

spacethanthatrequiredbythedataitcontains,andthisreducestheamountofphysical

diskcapacityinitiallyrequiredwhenadesktop

iscreated.

Storage Overcommit

Whenthedatastoreforanewlinkedclonedesktoppoolisassigned,administratorscan

controlhowaggressivelythesystemassignsnewvirtualmachinestothefreespace

availableonthedatastorebymodifyingthestorageovercommitproperty.

Whenthestorageovercommitlevelislow,themajorityoffreespaceisused

asbuffer

inwhichthedeltadisksforeachclonecanexpand.Astheovercommitlevelincreases,

lessspaceisreservedforindividualdeltadiskgrowthbutmorevirtualmachinesfiton

thedatastore.

Thestorageovercommitlevelcalculatestheamountofstoragethatisgreaterthanthe

physicalsizeof

thedatastorethatthecloneswoulduseifeachclonewereafulldesktop.

Table 6‐1showsthestorageovercommitlevelsyoucanset.

OTEThinlyprovisioneddisksdonotreduceinsizeifdataisremoved.

Table 6-1. Storage Overcommit Levels

Option Storage Overcommit Level

None Storageisnotovercommitted.

Conservative 4timesthesizeofthedatastore.Thisisthedefaultlevel.

Moderate 7timesthesizeofthedatastore.

Aggressive 15timesthesizeofthedatastore.

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Q-See Remote Client Software V 4.0.1 Spécifications Page 130