數(shù)據(jù)網(wǎng)格副本策略研究.pdf

1、上海交通大學(xué)上海交通大學(xué)碩士學(xué)位論文數(shù)據(jù)網(wǎng)格副本策略研究數(shù)據(jù)網(wǎng)格副本策略研究專(zhuān)業(yè)名稱(chēng)：專(zhuān)業(yè)名稱(chēng)：控制理論與控制工程控制理論與控制工程作者姓名：作者姓名：王馳王馳指導(dǎo)老師：指導(dǎo)老師：施亮施亮IIABSTRACTDataGridhastheabilitiesofdistributedstagewhichisabletocontaindatainvariousfmats.It

2、sappearanceprovidesagoodsolutionofmagnanimousdataprocessing.Replicaistheoneofthemostimptantkeytechniqueindatagrid.Theyareabletoreducethedelayofdatatransferimprovetheefficiencyofdataaccessprocessing.Theexistenceofreplicac

3、analsodetracttheaccessrequirementsofdataoniginalnodebalancethewkloadofnodesingridconsequentiallyoptimizetheperfmanceofthewholewk.Besideswhensomenodesareinvalidreplicaarealsoabletoreducethepossibilitiesofdatalostenhanceth

4、estability.Currentresearchesonreplicaindatagridarefocusontheconcentrativelookuptablemodel(e.g.Globus，Europedatagridproject).Inthesemodelstheperfmancesofkeynodeslimittheperfmanceofwholesystem.Inthisthesiswedesignareplicas

5、ystemwithoutkeynodeswhichrefersthecurrentP2Ptechnique.Themainfunctionsofthissysteminclude:replicacreationreplacementreplicalocationreplicaupdate.Theslipwindowstechniqueisintroducedinstrategyofreplicacreationreplacementwh

6、ichisabletomakeimmediateresponsestothechangeofwkthemoduleofreplicalocationobtainsthelocationsofreplicaaccdingtodatarequired.DHTtechniquecandistracttheinfmationofreplicaintomethanonenodethereplicaupdatemoduleusestheloosea