Cloud Computing - New Wine or Just a New Bottle

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1、GUESTEDITORS’INTRODUCTIONCloudComputing:CloudComputing:NewWineorJustNewWineorJustaNewBottle?aNewBottle?JeffreyVoas,ScienceApplicationsInternationalCorporationJiaZhang,NorthernIllinoisUniversityhebuzziseverywhere:cloudsandcloudelse.Phase3usheredincomputernetworksthatcomputing.Althoughthistopichasallo

2、wedmultiplecomputerstoconnecttoeachrecentlyattractedsignificantmomen-other.YoucouldworkonaPCandconnecttoTtumandattentioninbothacademiaothercomputersthroughlocalnetworkstoshareandindustry,nocommondefinitionexistsyet,1resources.Phase4sawtheadventoflocalnet-whichbegsthequestion,howcantherebesoworksthat

3、couldconnecttootherlocalnetworksmuchbuzzaboutsomethingwithoutanacceptedtoestablishamoreglobalnetwork—userscoulddefinition(s)?Itseemsquitecounterintuitive.nowconnecttotheInternettoutilizeremoteap-It’sgenerallyacceptedthatcloudcomputingplicationsandresources.Phase5broughtusthereferstoanewITparadigmfor

4、users.Butbe-conceptofanelectronicgridtofacilitatesharedforeweacceptthispremise,let’sfirstseefromcomputingpowerandstorageresources(distrib-ahistoricalperspectivewherecloudcomputingutedcomputing).PeopleusedPCstoaccessafitsinandwhetherit’sreallydifferentorjustthegridofcomputersinatransparentmanner.Now,

5、nextfad.inPhase6,cloudcomputingletsusexploitallavailableresourcesontheInternetinascalableThisYear’sModel?andsimpleway.Figure1illustratesthecomputingparadigmshiftAsFigure1shows,aconceptuallayer—acloudofthelasthalfcentury.ontheInternet—hidesallavailableresources(ei-Specifically,thefigureidentifiessixd

6、istincttherhardwareorsoftware)andservices,butitphases.InPhase1,peopleusedterminalstocon-publishesastandardinterface.AslongasusersnecttopowerfulmainframessharedbymanycanconnecttotheInternet,theyhavetheentireusers.Backthen,terminalswerebasicallylittleWebastheirpowerPC.Cloudcomputingthusmorethankeyboar

7、dsandmonitors.InPhase2,referstothetechniquesthatenableandfacilitatestand-alonepersonalcomputers(PCs)becamethisscenario.powerfulenoughtosatisfyusers’dailywork—WhencomparedtotheinfinitelypowerfulIn-youd