serialization of distributed execution-state in java

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1、SerializationofDistributedExecution-stateinJavaDannyWeynsEddyTruyenPierreVerbaetenDepartmentofComputerScience,DistriNet,K.U.Leuven,Celestijnenlaan200A,Leuven3001,Belgium++32(0)16327602http://www.cs.kuleuven.ac.be/~danny/DistributedBRAKES.html{danny,eddy,p

2、v}@cs.kuleuven.ac.beAbstract.Inthispaperwepresentamechanismforserializingtheexecution-stateofadistributedJavaapplicationthatisimplementedonaconventionalObjectRequestBroker(ORB)architecturesuchasJavaRemoteMethodInvocation(RMI).Tosupportcapturingandreestabl

3、ishmentofdistributedexecution-state,wedevelopedabytecodetransformerthataddsthisfunctionalitytoaJavaapplicationbyextractingexecution-statefromtheapplicationcode.Animportantbenefitoftheserializationmechanismisitsportability.Itcantransparentlybeintegratedint

4、oanylegacyJavaapplication.Furthermore,itdoesrequirenomodificationstotheJavaVirtualMachine(JVM)nortotheunderlyingORB.Theserializationmechanismcanservemanypurposessuchasmigratingexecution-stateoverthenetworkorstoringitondisk.Inparticular,wedescribetheimplem

5、entationofaprototypeforrepartitioningdistributedJavaapplicationsatruntime.Properpartitioningofdistributedobjectsoverthedifferentmachinesiscriticaltotheglobalperformanceofthedistributedapplication.Methodsforpartitioningexist,andemployagraph-basedmodelofthe

6、applicationbeingpartitioned.Ourserializationmechanismenablesthenapplyingthesemethodsatanypointinanongoingdistributedcomputation.1IntroductionInthispaperwepresentamechanismforserializingtheexecution-stateofadistributedJavaapplication.Wedescribethismechanis

7、minthecontextofasystemforrun-timerepartitioningofdistributedJavaapplications.Fordistributedobject-orientedapplications,animportantmanagementaspectisthepartitioningofobjectssuchthatworkloadisequallyspreadovertheavailablemachinesandnetworkcommunicationismin

8、imized.Traditionaltechniquesforautomaticpartitioningofdistributedobjectapplicationsusegraph-basedalgorithms,e.g.[7].Inastaticapproachanexternalmonitorautomaticallydeterminesthebestpossiblepartitioningoftheapplicatio