Google Search Appliance Upgrade and Migration Handbook Uživatelský manuál Strana 17

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Replacingafailedproductionsearchappliance
Movingasearchappliancetoanotherlocation
Renewingsearchappliances
ThemostcommonscenarioformigratingaGSAisduringtherenewalofaGSAlicense.Sincenewand
morepowerfulhardwareisprovidedwitheachrenewal,migrationplanningisacriticalcomponentofthe
renewalprocess.
Witheveryrenewalofappliances,adecisionmustbemadeonhowtomigratefromexistingtonew
appliances.Thefollowingtableoutlinestheadvantagesanddisadvantagesofeachmigrationmethod,where
newappliancesareofadifferentversiontoexistingappliances.
Advantages
Disadvantages
Migratingindexand
configurations
Ensurescompletesearchindex
replication
Doesnotrequirereindexingof
content*
Mirroringindexisfasterthan
recrawlingcontent
Requiresupgradingexisting
GSAstosameversionasnew
GSAs
Requiresappropriatelicense
capacity**
Morecomplexofaprocess,
particularlywithdistributed
architectures
Migratingconfigurationsonly
Allowscontroloverwhat
contentisindexedonnewGSAs
CanbeperformedonGSAs
withdifferingversions
MinimalimpacttoexistingGSA
configurations
Requiresreindexingofall
content(canbetimeintensive)
Createsadditionalloadon
contentserversduringrecrawl
Mayrequireadditional
connectorandfeedclientstobe
configured
*Reindexingofcontentmayberequiredinsomecases(eg.newfeaturesrequiringreindex)
**Migratingindexviamirroringcanbeperformediflicenseisincreasedonnewappliances,butnotif
decreased
PromotingaGSAconfigurationfromoneenvironmenttoanother
Formigratingbetweenenvironments(eg.testtoproduction),amanualconfigurationapproachis
recommended,sinceservernamesandURLstocrawlwillusuallyvary.Anexportofsimilarconfigurations
(eg.frontendXSLTandcollectiondefinitions)shouldbeperformed,combinedwithmanualentryofsettings
intheadminconsole.
Increasinglicensecount
InmostcaseswhereaGSAlicenselimitisincreased,thenewlicensefilecanbeappliedtotheexisting
appliance,withoutanyhardwaremigrationbeingnecessary.IfalicenseisincreasedaspartofaGSA
renewalhowever,certainconsiderationswillneedtobemade,dependingontherequiredchangesto
deploymentarchitecture.
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