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Features

96267 • G Chapter 1 Introduction: VTL appliances and enterprise data-protection 3

TheShredfeatureinsuresmilitarystandard,securedatadestructionby

overwritingvirtualtapewithrandombitpatterns.Datadestructionjobsare

queuedsothattheshredprocessdoesnothaveanexcessiveimpactupon

performance.

■ Datacompression

SunVTLPlus2.0supportsbothsoftware‐basedandhardware‐baseddata

compression.

Bothdata‐compressiontechnologiesoffersimilarfunctionality.Botharebasedon

theLZOalgorithm.Whennecessary,eithercanincreasetheamountofdatathat

willfitonavirtualtapeofagivencapacity.Compressionratios

canapproach2:1

fordatasetsmadeupofhighlycompressib lefiletypes,suchasplaintextand

uncompressedbitmappedimages(incompressiblefiletypes,suchasZIParchi ves,

GIFimages,andJPGim ag es reducetheatta ina ble compressionproportionately).

However,theoptionalVTLPlus2.0compressionhardwareofferssignificantly

higherthroughputperformance

comparedwiththesoftware‐onlyapproach.

SpecializedASICs(application‐specificin tegr ated circuits)ontheoptional

compressioncardsperformthecalculationsthatsoftware‐onlysol utionsmust

performonthesys temCP U.

■ SupportforSunStorageTekACSLSandLibraryStationlibrary‐management

software

ACSLSandLibraryStationsupportmakesahighdegreeofintegrationp oss ib le

betweenVTLsolutionsandcomplexenterprisestorageenvironmentsthatinclude

largelibrarieswithmultiplepartitionsandmixedopensystemsandmainframe

systems.SunVTL virtuallibrariescancache

orcopytapevolumestostorage

poolsonshared,ACS LS‐managedlibraries.Al terna tively,ACSLSca n be

configuredtomanagevirtuallibraries.

■ Emailnotifications

TheVTLemailalertsfeaturemonitorsanextensiblesetofpre‐definedcritical

systemfunctionsandautomaticallynotifiesalocalsys temadministratorbyemail.

You ca n extendor modifytheCallHomemoni toring scriptstocustomi z e

monitoringforyourneeds.

■ X‐raydiagnostics

TheX‐ray featurecombinessnapshotsofthe currentstateoftheappliance,its

configuration,anditsenvir onmentwithsystemeventlogsandsavestheresultin

astandard,tape‐archive(tar)format.

KeyVTLfeaturesarediscussedinmoredetaillaterinthischapter.

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Sun Microsystems Virtual Tape Library Manuel d'utilisateur Page 17