Google Search Appliance Upgrade and Migration Handbook Manuel d'utilisateur télécharger pdf (Page 19)

MigratingwithadistributedGSAarchitecture

InbothDistributedCrawlandServe,aswellasUnificationarchitectures,GSAMirroringcanbeusedto

expeditemigrationfromonesetofappliancestoanewsetofhardware(eg.inrenewal),peroneoftheabove

methods.Inthisscenario,itiscriticalthatthenodeassignmentandconfigurationremainsthesamefor

eachapplianceinthetargetarchitecture.

Forexample,whenrenewinghardwareinathreeshardarchitectureinDistributedCrawlandServe,shards

A,BandCwillhavetemporarymirrorsofA2,B2andC2(ie.thenewhardware).Whenthisnewhardwareis

configuredwithDistributedCrawlandServe,theymustbeassignedthesameshards(A2mustbemaster,

B2shouldbethesecondshard,andC2shouldbethethirdshard).

Thisishowever,morecomplexandanadvancedmigrationoptionthanmostGSAenvironmentsrequire,

anditisgenerallyrecommendedthatmigrationbyreconfigurationandreindexingbeperformedwhen

migratingadistributedGSAarchitecture.

FordetailsonconfiguringmirroringindistributedGSAarchitectures,refertodocumentationon“Configuring

DistributedCrawlingandServing”and“ConfiguringGSAUnification”.

Replacingafailedsearchappliance

AnothercommonscenarioformigratingasearchapplianceiswhenaGSAhasencounteredahardware

failureandneedstobereplaced.Migrationfromabackupordisasterrecoverysearchapplianceneedsto

occuronceareplacementGSAisreceived,andcanbedonebyanyoftheabovementionedapproaches.

Someadditionalconsiderationswhenreplacingafailedsearchapplianceinclude:

● Incaseswhereafailedappliancewaspartofamirroringnetwork(eg.amasterappliance),amaster

appliancemustbereestablishedfirst.Forexample,oneofthereplicasmustbepromotedtobea

masterappliance,whichthencanbemirroredtothereplacementappliance.

● TheappropriateGSAlicensingmustbeappliedtothemainproductionservingappliance(s).Ifa

GSAwithaproductionlicensewastheonethatfailed,thereplacementappliancemusthavea

productionlicensetoreceivetheappropriatelevelofsupportfromGoogleEnterpriseSupport.

Movingasearchappliancetoanotherlocation

Insomecases,itisrequiredthatasearchappliancebemovedtoanewphysicallocation.Forexample,

thismayoccurwithchangestodatacenters.

Someconsiderationswhenphysicallymovingasearchapplianceinclude:

● SystemavailabilityActionsshouldbetakentoassessandhandleimpactsofsystemdowntime.

Forexample,stoppingfeedsandconnectors,disablingGSAmirroringifconfigured,andswitching

searchservingtoafailoverGSAenvironment.

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Google Search Appliance Upgrade and Migration Handbook Manuel d'utilisateur Page 19