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1、GridComputing&CloudComputing----byHuJing----2009.4.10ProgressCloudComputing3DefinitionforCloudcomputingAlarge-scaledistributedcomputingparadigmthatisdrivenbyeconomiesofscale,inwhichapoolofabstracted,virtualized,dynamically-scalable,managedcomputingpower,storage,platforms,andservicesaredeliver
2、edondemandtoexternalcustomersovertheInternet.(IanFoster)特点：超大规模虚拟化高可扩展性高可靠性按需服务极其廉价通用性Relation网格计算异构资源不同机构虚拟组织科学计算为主高性能计算机紧耦合问题免费标准化科学界云计算同构资源单一机构虚拟机数据处理为主服务器/PC松耦合问题按量计费尚无标准商业社会GridComputing&CloudComputingGridComputing&CloudComputingCloudsandGridssharealotcommonalityintheirvision,architectur
3、eandtechnology,buttheyalsodifferinvariousaspectssuchassecurity,programmingmodel,businessmodel,computemodel,datamodel,applications,andabstractions.Thevisionisthesamereducethecostofcomputing;increasereliability;increaseflexibility.theproblemsaremostlythesamemanagelargefacilities;definemethodsby
4、whichconsumersdiscover,requestanduseresourcesprovidedbythecentralfacilities;implementtheoftenhighlyparallelcomputationsthatexecuteonthoseresources.BusinessModelTraditionalbusinessmodelsoftwarehasbeenaone-timepaymentforunlimiteduse(usuallyon1computer)ofthesoftware.Cloud-basedbusinessmodelacust
5、omerwillpaytheprovideronaconsumptionbasis,suchaselectricity,gas,andwater,reliesoneconomiesofscaleinordertodrivepricesdownforusersandprofitsupforproviders.ThebusinessmodelforGridsproject-orientedinwhichtheusersorcommunityrepresentedbythatproposalhavecertainnumberofserviceunits(i.e.CPUhours)the
6、ycanspend.ArchitecturePaaSSaaSIaaS如：SaleforceonlineCRM服务如：GoogleAppEngine如：AmazonEC2/S3/SQS服务ResourceManagementComputeModelGrids：batch-scheduledcomputemodel,don’tnativelysupportinteractiveapplicationsClouds:resourcesbeingsharedbyallusersatthesametime,allowlatencysensitiveapplicationstooperate
7、nativelyResourceManagementDataModelInternetComputingwillbecentralizedaroundData,CloudingComputing,aswellasClientComputing.ResourceManagementCombiningcomputeanddatamanagementGridData-awareschedulersanddispersingdataclosetoprocessorsClouddata-i
