多級安全分布式事務處理系統(tǒng)的研究與實現

1、江蘇大學碩士學位論文多級安全分布式事務處理系統(tǒng)的研究與實現姓名：劉青海申請學位級別：碩士專業(yè)：計算機應用技術指導教師：晏立20080608江蘇大學碩十學位論文ABSTRACTWithtllecontmuousdevelopmem0fi血咖ationtectulologyandi疵nnationiIliIustr職mo叮e雒dmorei砌!brma矗onneed彭oprocessandexchange，andthemoste骶ctivet

2、oolofprocessingiIlfb肌ationisda住lbaseapplicatiollsOnthe0neh卸d，、ⅣemustiIIIprovetllesVstemefficiencyt0shareinfo肌ationresources硒far勰possible，ontheotherhandwemustpreVemgetthlgresourcesby11singthesharedplatfonnsurlla、ⅣfullyThe

3、researchandiIllplementationoftheMulti1evelsecuritvDistributcd7rraIlsactionManageInenthasbecnsllbjectedtotlleattentionoftllepeople，blnalsoasanimponantresearchtopicofi11fb仰ationsecuri饑Theconcu盯encycontrolmechaIli跚nbasedons

4、i霉mal10ckofEBe血oetalsolVestheproblemofc0Vertch鋤el狃dhunger，butiIlhi曲一loadd豫lmstances，ala略enumberofIowlevel仃ansactionsalwaysraisesomesi印als砌chneedhigllleveltransactionstoseⅣe，whichledhigtlleveltransaCtionstosufferh0mhunger

5、SPalh雒proposedalocl【ingprotocolusiIlg鉚oC0mmittedVersio璐t0solVetIleaboveproblemHoweveritiIllposesadeadlinewimiIlwhenaⅡtlighleveltransactions’readdatamustbecompletedⅡnotcompleted，thensudhtmsactionshavetobeaborted，possiblyf

6、esultiI培iIliIldenitedelayMoreover，higllerleveltransactionsareal、張ysreadolderversionsoftlledata，whichusuallVmaynotbeacCeptableTbsolVetheproblemaboVe，weproposeaseCureconcIln_encycontrolalgorimmtllatisbasedonalockingstrateg

7、y鋤dmatrequiresoIllytwoversions，0rleC0mmittedaIldonenonC0n皿i批dVersionofdata，allreadoperations，tligtlorlow，areper|bmedonmepreviouscommittedversionwhilemewrite0perationproceedsonⅡleuncommittedversionSoithasthetw0advanta日eso

8、fsi腫allockmechaJlismand啪velSionsIIladdition，thetraditionalmlllti1eVelsecufitydistributedcommitprot0C0lisIlotsuitableforusingiIlmultile、他lsecuredistributeddatab嬲essVstemst0meettherequire]【nentsofthesafet!IraJldserializabi

9、li以InthisworI【，basedontllesecIlrityconCIlrrencVcontrDlmechaIlism，weproposeamuld1evelsecuritvdistribu鋤Commitprotocol(舵舊S!E—wIlichbasedonsi印alloCkandallowadistribu刷t陽nsactiont0proceedevenwhenapanicipaIlthasrele貓editslOw1ev

10、elreadlOcJ【sprematurelVt0meetnlesafe蝕requirementsandtheserialrequirementFinally，、Ⅳedesi舀laIldimplemen謝onmulti1evelsecuritydistributed咖ls枷0nmaIlagementprototypesyStembasedonmetlleo巧oft11ispaperThrougllexperilne：ntalprotot

11、ype，wepr0Vedthalthemulti—levelsecllri哆concu玎ency∞ntrolprOtOcol柚dmulti—levelsccuri竹distributcdcommit烈gorimmsarea出evable鋤dfe雒ibleKeywords：Concu仃encyContr01，CovenChaIlnel，1Woversiontwophaselocl【Signallocl【，MultiLeVelSecurit