一種基于用戶(hù)體驗(yàn)值的副本冗余度管理系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn).pdf

1、電子科技大學(xué)碩士學(xué)位論文一種基于用戶(hù)體驗(yàn)值的副本冗余度管理系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)姓名：王全修申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：計(jì)算機(jī)系統(tǒng)結(jié)構(gòu)指導(dǎo)教師：任立勇20090501AbstraetABSTRACTWiththedevelopmentofpeertopeercomputingparadigm，networkbandwithand，thecapacityofInternetbasedsystems，theend—systemsignoredinth

2、epastbecomeavaluedcomputingresourceHowtoutilizetheendsyst鋤_sresourcestobuildadistributedstoragesystemwithlargescale，highscalability，reliabilityandperformanceindynamicpeertopeernetworkenvironmentisahotresearchtopicinrecen

3、tlyyearsInthisthesis，firstly，itdiscussesandsummarizesthedevelopmentandactualityofdistributedstoragesystemsBasedonsystematicallyanalyzingandsummarizingtherelevantworksonpeertopeertechnology，itdesignsaP2Pbaseddistributedst

4、oragesystem：PPDSSBaesdOnahi曲lyscalableP2Pbasedarchitecture，PPDSSorganizeslargenumbersofnodesdistributedinInteractintoaunitedoverlaynetworkDuetothecomplexityofnetworkenvironment，itisinevitablefortheproblemofsinglestoredno

5、defailureHence，themechanismofmulti—replicahasbeenintroducedintothesystemwhichisinordertoevaluatetheusabilityandreliabilityButwhilethemanagementofthereplica，twosignificantissues，theredundancyandconsistencyofthereplicashou

6、ldbehandledfirstAmongtheexistingtechniques，itisuniversallyacceptedthatthemanagementofreplicaisbasedonthefrequencyThemorefrequentusersaccessafile，themorereplicasthisfileenjoysHoweveratthesametime，thissolutioncannotactuall

7、ysolvereal—worldproblemAssumingthatthecapacityoftheseverisSOadequatetohandletheconcurrenteasilyaccessfromtheclient，thenthereisnoneedtoincreasethereplicatoimprovetheuserexperienceFromtheanalysisaboveitrevealsthatthereiSno

8、necessaryrelationshipbetweenthefrequencyofaccessandthenumberofreplicaThat’Swhythispapertriestoprovideabettermechanismofreplicamanagement，UERM，whichistotallybasedonthefeatureofP2PproxyusedbyPPDSSForinstancewhenthesystemde