专业外文翻译题目基于J2EE在分布式环境下的底层结构的自动动态配置的应用系（院）专业班级学生姓名学号指导教师职称滨州学院教务处二〇一〇年三月一日滨州学院本科毕业设计（专业外文翻译）PAGE\*MERGEFORMAT10InfrastructureforAutomaticDynamicDeploymentOfJ2EEApplicationinDistributedEnvironmentsAnatolyAkkerman,AlexanderTotok,andVijayKaramcheti1.IntroductionInrecentyears,wehaveseenasignificantgrowthincomponent-basedenterpriseapplicationdevelopment.TheseapplicationsaretypicallydeployedoncompanyIntranetsorontheInternetandarecharacterizedbyhightransactionvolume,largenumbersofusersandwideareaaccess.Traditionallytheyaredeployedinacentrallocation,usingserverclusteringwithloadbalancing(horizontalpartitioning)tosustainuserload.However,horizontalpartitioninghasbeenshownveryefficientonlyinreducingapplication-relatedoverheadsofuser-perceivedresponsetimes,withouthavingmucheffectonnetwork-inducedlatencies.Verticalpartitioning(e.g.,runningwebtierandbusinesstierinseparateVMs)hasbeenusedforfaultisolationandloadbalancingbutitissometimesimpracticalduetosignificantrun-timeoverheads(evenifonewouldkeepthetiersonafastlocal-areanetwork)relatedtoheavyuseofremoteinvocations.RecentworkinthecontextofJ2EEcomponentbasedapplicationshasshownviabilityofverticalpartitioninginwide-areanetworkswithoutincurringtheaforementionedoverheads.Thekeyconclusionsfromthatstudycanbesummarizedasfollows:•Usingproperlydesignedapplications,verticaldistributionacrosswide-areanetworksimprovesuser-perceivedlatencies.•Wide-areaverticallayeringrequiresreplicationofapplicationcomponentsandmaintainingconsistencybetweenreplicas.•Additionalreplicasmaybedeployeddynamicallytohandlenewrequests.•Differentreplicasmay,infact,bedifferentimplementationsofthesamecomponentbasedonusage(read-only,read-write).•Newrequestpathsmayreusecomponentsfrompreviouslydeployedpaths.ApplyingintelligentmonitoringandAIplanningtechniquesinconjunctionwiththeconclusionsofthatstudy,weseeapotentialfordynamicadaptationinindustry-standardJ2EEcomponent-basedapplicationsinwideareanetworksThroughdeploymentofadditionalapplicationcomponentsd