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1、#82CONTENTSINCLUDE:nAboutCloudComputingGettingStartedwithnUsageScenariosnUnderlyingConceptsnCostnDataTierTechnologiesCloudComputingnPlatformManagementandmore...ByDanielRubioVisitrefcardz.comalsominimizestheneedtomakedesignchangestosupportABOUTCLOUDCOMPUTINGonetimeevents.Webapplicationshaveal
2、waysbeendeployedonserversAutomatedgrowth&scalabletechnologiesconnectedtowhatisnowdeemedthe‘cloud’.Havingthecapabilitytosupportonetimeevents,cloudcomputingplatformsalsofacilitatethegradualgrowthcurvesHowever,thedemandsandtechnologyusedonsuchserversfacedbywebapplications.haschangedsubstantiall
3、yinrecentyears,especiallywiththeentranceofserviceproviderslikeAmazon,GoogleandLargescalegrowthscenariosinvolvingspecializedequipmentMicrosoft.(e.g.loadbalancersandclusters)areallbutabstractedawaybyrelyingonacloudcomputingplatform’stechnology.Thesecompanieshavelongdeployedwebapplicationsthata
4、daptandscaletolargeuserbases,makingthemInaddition,severalcloudcomputingplatformssupportdataknowledgeableinmanyaspectsrelatedtocloudcomputing.tiertechnologiesthatexceedtheprecedentsetbyRelationalDatabaseSystems(RDBMS):MapReduce,webserviceAPIs,ThisRefcardwillintroducetoyoutocloudcomputing,with
5、anetc.SomeplatformssupportlargescaleRDBMSdeployments.emphasisontheseproviders,soyoucanbetterunderstandwhatitisacloudcomputingplatformcanofferyourwebapplications.CLOUDCOMPUTINGPLATFORMSANDUNDERLYINGCONCEPTSUSAGESCENARIOSAmazonEC2:IndustrystandardsoftwareandvirtualizationPayonlywhatyouconsumeA
6、mazon’scloudcomputingplatformisheavilybasedonWebapplicationdeploymentuntilafewyearsagowassimilarindustrystandardsoftwareandvirtualizationtechnology.tomostphoneservices:planswithallotedresources,withanwww.dzone.comGetMoreRefcardz!incurredcostwhethersuchresourceswereconsumedornot.Virtualizatio
7、nallowsaphysicalpieceofhardwaretobeutilizedbymultipleoperatingsystems.ThisallowsresourcesCloudcomputingasit’sknowntodayhaschangedthis.(e.g.bandwidth,memory,CPU)tobeallocatedexclusivelytoThevariousresourcesconsumedbywebapplications(e.g.individualope