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Data Migration Testing Purpose, Test Strategy And Scenarios.pdf
The document discusses the complexities and common mistakes involved in data migration, emphasizing the importance of avoiding data loss and ensuring accuracy during the process. It highlights the need for thorough testing and validation, including data and application-level checks, as well as engaging end-users and utilizing migration tools to mitigate risks. Furthermore, it underlines the rising trend of businesses migrating to cloud-based solutions, showcasing the benefits and statistics related to cloud adoption and the financial implications of data loss.
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Data Migration Testing Purpose, Test Strategy And Scenarios.pdf
- 1. elinext.com ThesearethemostcommontypesofDataMigration: Hence,avoidingdatalossduringmigrationplaysacrucialrole. Hereisalistofthemostcommonmistakesbusinessowners makewhenmigratingdata: Wehavealreadyseenthatdatamigrationisacomplexprocesspronetomistakes. Undoubtedly,theriskofdatacorruptionandlossincreasesdramaticallyduring migration.AccordingtoHostingTribunal,theconsequencesofdataloss canreachadramaticdimension: DataMigration Testing: Purpose, Test Strategy And Scenarios Thereasonswhybusinessesdecidetomigratedatavary: reducecosts,enhancescalabilityandflexibility,addsecurity, enhancecollaborativework,systemupgrades,etc.But, whateverthereasons,DataMigrationgoeswellbeyond transferringinformationfromonesourcetoanother.Itisa complexprocessthatrequiresexpertise,skills,and–obviously –therighttools.Thebiggertheamountofdata,themore challengingandcomplexthemigrationprocesswillbe. What is Validation Testing? ? ? DatamigrationtestingincludesDataLevelValidationandApplicationLevelValidation. DataLevelValidationTesting Therearevarious levelsofverifications: ismeanttoverifyifdatahasbeen migratedwithoutdiscrepancies. Rowcounts(i.e.numberof recordstobemigrated) Dataverification(i.e.verifythe accuracyofamigrateddata sample) Entitlementverification(i.e.the verificationofthedestination database) TheApplicationLevelValidationTesting impliestheverificationofthefunctionality ofamigratedsampleapplication toensureitssmoothrunning withthenewdatabase. Thisprocessimpliesvariousvalidations: Loggingintothenewapplication andverifyingasampledataset Loggingintothelegacysystem andverifyingtheaccounts’ status Verifyingcustomersupportaccess tolegacysystems,orensuring useraccesstolegacysystemsif themigrationprocessfails. Migration Testing Types and Scenarios The common mistakes in Data Migration What is Data Migration Testing? ?? Insimpleterms,datamigrationisaprocessthatconsistsofmovingdata,application, andotherelements–eithermanuallyorautomaticallyusingmigrationtools–froma sourceplatformtothedestinationone.Usually,legacysystemsareeitherreplacedor expandedbynewapplicationsthatshareacommondataset. Thecurrenttendencyamongbusinessesistoreplaceon-premisesapplications andinfrastructureswithcloud-basedapplicationsandstorage.Andtherearegood reasonsbehindthisdecision. However,DataMigrationTestingplaysacrucialroleandit’snotrisk-free.Migrateddata iscomparedwithoriginaldata,thusallowingexpertstoidentifyanypossible discrepanciesandfixerrors. AccordingtoMicrosoftOffice365,the benefitsofcloudenvironments‘stackup’ forsmallandmedium-sizedbusinesses: Smallbusinessesthatreport securitybenefitssincemoving tothecloud 94% 59% 30% 82% 70% Smallbusinessesusingcloud servicesthatreportsignificant productivitybenefitsfromIT Smallbusinessesnotyetusing cloudservicesthatreport significantproductivity benefitsfromIT Companiessurveyedthat reducedcostsasaresult utilizingcloudtechnology Surveyedsmallbusinessesthat reportreinvestingcloudcost- savingbackintotheirbusiness AccordingtoTechJury,thecloud adoptionstatisticsaremind-blowing: Thepubliccloudcomputing marketwillbeworth$800 billionby2025 By2024,enterprisecloud spendingwillmakeup14% ofITrevenueglobally Platformasaservice(PaaS) will growby26.6% in2021 70% ofcompaniesusingcloud plantoincreasetheirbudgets inthefuture 61% ofbusinessesmigratedtheir workloadstothecloudin2020 Amazonwebservices(AWS) had a76% shareoftheenterprise cloudadoptionin2020. 40%-60% of small businesses won’t reopen after data loss Small businesses are set back $8,000 for an hour of downtime The average cost of downtime for large enterprises is more than $11,600 perminute The annualized faliure rate of harddrivesfor the third quarter of 2020 was0.89% The average cost of downtime for companies of all sizes is $4,600/minute In40% ofthecases,the reason for data loss is a hardwarefaliure Detecting breaches takes around 206 days 2,013 databreachesoccured in 2019 alone Humanerroris the cause of information loss in 29% ofcases -$ The average cost of compromised data in 2020 was $3,86 million $ ! ! ! 1 Notremovinglegacy structuresthatareinefficientorobsolete Beforeyoubeginthemigrationprocess,itisnecessarytoexamineanddecide whatsourcedatashouldbemigrated.Migratingduplicatesorerrorscanresultin expensivefailures.It’stimetogetridofallthejunkdata. 2 Insufficientorfaulty testingandvalidation Thinkingthatmigrationwillrunseamlesslyisunrealistic.Theonlywaytoachieve yourgoalandsavetimeandmoneyisbyperformingtestingthroughoutthe entireprocess. 3 Lackofexpertise Sometimes,businessownersunderestimatethecomplexityofthedatamigration process.Nottomentionthechallengesitposes. Inorderforadatamigration processtorunwell,itismandatorytocountontheexpertiseofspecialistswhoare abletoquicklyidentifyandfixdatadiscrepancies. 4 Leavingend-usersaside Beforebeginningadatamigrationprocess,thereisonequestionthatmost businessownersforgettoaskthemselves:‘Whoisgoingtousethisdata?’ Itisnot goingtobetheITspecialist,that’sforsure.Soitisimportanttoengageallthe end-usersinthemigrationprocesstoavoiduncountablesupportrequestsand downtimesoncethemigrationiscompleted. Whenitcomestotesting,qualityisparamount.Butsoisspeed,especiallyifyou wanttoreducerisks,identifyerrorsearlier,reducesystemdowntime,savetimeand costs,and,thus,speedupyourbusiness’ development. Sincethemigrationneedsaredifferent,automatedmigrationtoolsdifferaswell. AltexsoftanalysedfourofthebestavailableTestAutomationtools: How can Test Automation benefit Data Migration? Deployment + + Astra Centerprise On-premises Jobscheduling Plethoraoffeatures andconnections From$30k peryear Freetrial Nofreeversion Drag-and-dropUI Bestcustomer service Issueswith metadata Lackofcloud options Joborchestration Dataprofiling Datavalidation Parallel-processing ETL Windows Platform + + Talend Cloud-based Plethoraoffeatures andconnections From$12k peruser/ year 14 daysfree trial 900+ free components Effectiveprofiling Impressivedata migrationspeed Fee-basedand sometimes fruitlesstech support Joborchestration Dataprofiling ETL Debugging Datagovernance Windows, andMacOS platforms + + Informatica PowerCenter On-premises, Cloud-based Highspeedofdata transformation Onrequest 30 daysfree trial Nofreeversion Unrivalid performancewhen movinglarge datasets Longlearning curve Inflatedpricing Workflow management Repeatabledata auditandvalidation Parallel-processing ETL Loadbalancing Windows Platform + + StarfishETL On-premises, Cloud-based IntuitiveUI From$495 per migration Freetrial Nofreeversion Advancedsupport ofscripting languages Manypre-built migrationmaps Detailederror- reporting Runonlyone migrationatatime Techbackground required Workflow management Backuprecovery ETL Testing Reporting Windows Platforms Keepinmindthattestautomationdoesn’tmeanyouwillnolongerneedaspecialist toplan,supervise,andvalidatethemigrationprocess.A tool’sefficiencyonlygoesas farastheexpertiseofthepersonusingit. Key features Prosandcons Pricing Datamigrationtonewerandmoreperformantsystemsallowsbusinessesto transformandimprovetheirecosystemsandgrantsthemadvantagesovertheir competitors.However,thedatamigrationprocessiscomplexanderror-prone. Usingtherightstrategiesandtoolsattherighttimeandavoidingcommon mistakesistheonlywaytoensurethesuccessofthemigrationprocess. To sum up Inthiscase,anentireapplication needstobemigratedfromone platformtoanewone.Forexample, migratingASP.NettoWindows Azureormigratinganapptothe cloud.Testingshouldinclude: identifyingrequirementsandscope oftesting,testingtheflowinthe legacyapplicationandcontrastit withthenewoneand–ifnecessary– testthenewflow. Inthiscase,expertsshouldmakesure thattheappworkscorrectlyandthat thenewplatformsupportsallthe application’scomponentswithout errors(e.g.plug-ins,paths,add-ons, etc.) itisimportanttomakesurenot onlythatolddataisretainedbutalso thatnewdatafunctionscorrectlyon thenewplatform. Onetestingscenariocouldbemigrate anapplicationtonewtechnology. ApplicationMigration Inthiscase,theserverdataandthe configurationaremigratedtoanew server.MigratingHP BoxtoIBMBox couldbeagoodexample.When performingtesting,expertsshould ensurecompliancewiththe destinationserverandtestdata handling.Itisimportanttomake surethatthereisnodatacorruption. ServerMigration ServerMigrationtestingscenarios: Verifyingrequest-responce betweenserverandtheapplication Testingclient-serverlogsforallactions Ensuringthatthewholesystem passestesting Testingthestabilityofthe environmentandensuringthere arenoconnectivityissues Herearesomeexamplesofre-disigning:WindowstoLinux,migrationtoCloud- basedVMs,ormigratingtoSaaS.TestingshouldincludetheanalysisofthenewOS’s dependenciesandseehowconfigurationmodificationsinfluencetheapplication. Sinceflowmightvary,ExtensiveTestingandCompatibilitytestingaremandatory. Thisisprobably themost complicatedtypeofmigration. Whenanapplicationneedstobe migratedfromanoperatingsystem toanewone,compatibilityrisks ariseandmanycomponents(e.g. interface,configuration,etc.) might requirere-designing. OS Migration OS MigrationTestingScenarios: EnsureSoftwareandHardware compatibility Ensureperformanceisnot affectedonthenewOS Ensurethewholesystem passestesting Inthiscase,allthedatainanapplication’sdatabaseismigratedtoanewdatabase.For themigrationtobesuccessful,itisnecessaryfortheapplicationtobestableandthedata tobevalid.RDBMS toanewRDBMS ortoMongoDBcouldbetwomigrationexamples. DatabaseMigration DatabaseMigrationtestingscenarios: Ensuringthatthelegacydatabase doesn’tgetupdatedduringtesting oncemigrationiscompleted Makingshurethattablelevelsand themappingatfielddon’tchange Verifyingthatalldatahasbeen migratedaccurately Performingpre- andpost- migrationtesting Ifthedatabaseismigratedtoa similartypeofdatabase,thetesting scenarioshouldbe Ensuringthattheexeccuted querieshavethesameresultsin thelegacyandnewdatabasesand thatthenewdatabasefunctions exactlyliketheoldone Usinganautomationtool,ensure thatthenumbarofrecordsisthe sameinbothdatabases Ensuringthattablestructures, relationshipandschemahavenot beenaltered Makeshurethatthenewdatabse providesconnectiontoallthe application’scomponents(e.g. interfaces,server,firewall,etc.)