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Advantages of VTL tape virtualization

4 VTL User Guide • May 2008 G • 96267

AdvantagesofVTLtapevirtualization

AddingSunStorageTekVirtualTapeLibraryappliancestoanexistingtape‐based

backuparchitecturecanthusrealizethefollowingadvantages :

■ “Shorterruntimesandreduceddependency onbackupwindows”onpage 4

■ “Shorterruntimes fornon‐sequentialbackupjobs”onpage 5

■ “Improvedreliability”onpage 5

■ “Betterutilizationoftapesubsystems”onpage 5

■ “Larger, moreflexiblelibraries”onpage 6

■ “CompatibilitywithACSLS managementsoftware”onpage 6

■ “Truetapevirtualizationwithdynamicallyallocateddisk space”onpage 7.

Shorterruntimesandreduceddependencyon

backupwindows

VTLappliancescanhandleanarrowbackupwindowbyusingnumbersofvirtual

drivesoperatinginparallel,somethingthatwouldbehighlyimpractic al with

physical tapedrives.Inthisway,thecritical,fir stcopyoftheprimarydataisreliably

transferredtodisk‐basedvirtualtapeinminimumtime.Thereafter,vaulting



softwareand/or VT L tape‐cachingfeaturesca n copythebackupfromvirtualto

physical mediausinga smaller,moreeconomicalnumberofphysicaldrives.Seethe

figurebelow:

Multiple virtual drives speed backup during the critical backup window

virtual

tape

drives

virtual library

physical library

primary storage

physical

tape

drives

Back up to multiple virtual tape

drives during the critical

backup window

At other times, copy virtual tapes to

physical media using one or two

dedicated tape drives

backup

window

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Sun Microsystems Virtual Tape Library Manual do Utilizador Página 18