Google Search Appliance Upgrade and Migration Handbook Manuel d'utilisateur télécharger pdf (Page 8)

Analyzeimpactandchangesrequiredfortheupgrade

Oncethescopeoftheupgradehasbeendefined,animpactanalysisshouldbeperformedtodeterminethe

changesthatwillbeneededtobemadetotheGSAenvironmenttoaccommodatefortheupgrade.

CommonconsiderationswhenperformingaGSAupgradeinclude:

Reindexingcontent

● AcompletereindexmaybearequirementofupgradingtothenewGSAsoftwareversion.TheGSA

softwareupdateinstructionstypicallyprovidedetailonthisrequirement.

● Somenewfeaturesrequirethereindexingofcontent.Forexample,enablingEntityRecognitionand

DocumentPreviewsinv7.0requirereindexingcontentsincethesefeaturesinvolveindextime

processing.

Frontendmodification

● EnablingnewuserinterfacefeatureswillalwaysinvolvechangestoexistingGSAfrontends

● Forcustomuserinterfaces(customXSLTorcustomapplicationlayers)thecomplexityofthese

changesmaybeanythingfromtrivialtohighlycomplex,dependingonthefeature.

● ForimplementationsinvolvingcustomXSLTmodifications,itisrecommendedthatthenewversion’s

defaultXSLTstylesheetbeusedasastartingpoint,andcustomizationsbereintegratedintoit.

Thisistypicallyasimplerapproachthandeterminingthechangesrequiredtoimplementthenew

featureintoanexistingXSLTstylesheet.

Feedchanges

● WhennewfeaturestotheGSAfeedsprotocolareintroduced,customfeedsshouldbeanalyzedto

determinewhethertheymaybenefitfromthenewchanges.Forexample,inv7.0,newACLfeatures

suchasDENYACLsandACLinheritancewereintroducedandoffersignificantlyincreased

flexibilityfordesigningfeedsforsecurecontent.

● WhilstupdatestotheGSAfeedprotocolaregenerallybackwardcompatible,changesthatare

introducedtotheprotocolshouldbeanalyzedtoensurethatexistingGSAfeedsarenotimpacted.

Connectorupgrades

● NewGSAupgradeswilltypicallysupportanyexistingversionsofGoogleconnectors.However,itis

recommendedthatversioncompatibilityofconnectorsbeconfirmedpriortoupgradingtoanew

GSAversion.

Defineanupgradestrategy

Thegoalofdefininganupgradestrategyistodeterminethebestprocesstoupgradetheappliancesina

GSAenvironmentwhilsthavingminimalimpacttosearchusersanddependentsystems.

ItisimportanttounderstandthepotentialimpactsoftheupgradeprocesstotheGSAdeployment

environment.Thissectiondiscussesanumberofscenarios,wherespecialconsiderationsshouldbemade

whenupgradingasearchappliance.

● Upgradingmultipleenvironments

● UpgradinganinterconnectedGSAnetwork

● Upgradingwithconnectorsorfeeds

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Google Search Appliance Upgrade and Migration Handbook Manuel d'utilisateur Page 8