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Chapter 5 Working with Configurations

Cloning Configurations

Stage Managerallowsyoutocreatelinkedclonesandfullclonesofanundeployed

configuration.

Alinkedcloneoperationgeneratesa“quick”copybycreatingadeltadiskinsteadof

copyinganentirevirtualharddisk.Thisoperationaddressesvirtualmachine

proliferationbyusing“referentialprovisioning,”aprocessthatinvolvesstoringnew

changesbutreferringbacktoachainofdeltadisks.Foreachclone,Stage Manager

freezestheoriginaldeltadiskandcreatesanewone.

Afullcloneoperationcopiesallofthedeltadisksandthebasediskandconsolidates

themintoanewbasedisk.Theoriginalbasediskremains

unchanged.

Typically,youdonotcreatefullclonesexceptundertheseconditions:

 Youneedtodismantlethestorageandmovetheconfigurationtoadifferentserver.

 Youwanttomaximizeperformanceforvirtualmachines(forexample,forcertain

production‐levelvirtualmachines).

Afull‐cloneoperationtakesalongertimethanalinked‐cloneoperation.

Inafencedconfiguration,virtualmachinesretainthesameIPaddresswithinthefence.

Stage ManagerassignsnewexternalIPaddressesforcommunicationoutside

thefence.

Eachtimeyoudeployafencedconfiguration,Stage ManagerassignsnewexternalIP

addressesfromtheStage ManagerIPaddresspool.Stage ManagerreturnstheIP

addressestothepoolwhenthefencedconfigurationisundeployed.Stage Manager

doesnotreturntheIPaddressofalinkedclonetotheIPpool

untilthevirtualmachine

andallitscopiesaredeleted.

Whenyoucreateaeitheralinkedorfullclone,Stage Managerassignsthesame

networkparameterstotheclonedvirtualmachines.Ifyoudeploytheoriginaland

clonedconfigurationsatthesametime,duplicateIPaddresserrorsoccurunlessoneof

theconfigurationsisdeployedinfencedmode.Forinformationaboutfencing,see

Appendix C,“NetworkFencing,”onpage 181.Forinformationaboutthealternativeto

fencingforthissituation,see“ChangingIPAddresses”onpage 161.

SomeStage Manageroperationsindirectlyinvolvecloning.Forexample,archivinga

configurationinvolvesacloningprocess.Formoreexamples,

see“EnablingResources”

onpage 77.

Thisoperationinvolvesspecifyingastoragelease.See“ReviewingtheResource

CleanupTab”onpage 103.

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VMware VLM3-ENG-CP - Lab Manager - PC Guide de l'utilisateur Page 129