Sun Microsystems Virtual Tape Library Manuel d'utilisateur Page 53

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Managing virtual libraries
96267 • G Chapter 4 VTL operations 39
Configuringandprovisioningvirtual libraries
Thissectiondescribestheproceduresforcreatingandmaintainingvirtuallibraries,
withtheirvirtualdrivesandmedia. Itdocumentsthefollowingprocedures:
“Settingvirtuallibrarysystemproperties”onpage 39
“Creatingvirtualtapelibraries”onpage 41
Settingupoptionalfunctionality(see“C onfig uri ngAutomatedTapeCaching”on
page 45,“Settingupthe AutoArchivefeature”onpage 49,or“Setting upthe
AutoRepl ic ati o noption”onpage 5 0)
“Generatingthevirtuallibrary”onpage 51
“Creatingvirtualtapes”onpage 56.
Settingvirtuallibrary systemproperties
1. InthetreeviewattheleftoftheVTLconsole,rightclicktheVirtualTape
Library System(
A below),andselectPropertiesfromthecontextmenu(B).
2. Whenth eChange VirtualTape Librarypropertiessheetappears,ifyouwish
touseVTLcompressionsoftware,checktheEnable Virtual Tape Library
compression mode checkbox(
C below).
Consideryourrequirementscarefullybeforeenablingsoftwarecompression.
Softwarecom pre ssi on is acomputation all ydemandingoperationthatconsumes
processorcyclesthatwouldotherwisebeusedtomovedata.When youenablethe
feature,youthustradethroughputperformanceforcapacity.MostVTL sol utions are
aimedatincr easi n gbackupperformance. VTLstorage
isus ed asafast,temporary
repositoryfordatathatwillbe movedtophysicaltapeforlongtermstorage.Insuch
cases,thehardwarebasedcompressioncapabilitiesofphysicaltapedrivesprovide
B
A
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