分布式操作系统结构精析

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1、2013/10/15ContentsChapter01:IntroductionArchitectures02:Architectures03:Processes04:Communication05:Naming06:SynchronizationRuiMa07:Consistency&ReplicationSchoolofSoftware08:FaultToleranceBeijingInstituteofTechnology09:Securitymary@bit.edu.cn1

2、0:DistributedObject-BasedSystems11:DistributedFileSystems12:DistributedWeb-BasedSystems13:DistributedCoordination-BasedSystems02:ArchitecturesArchitecturalStyle2.1ArchitecturalstylesAarchitecturalstyleisformulatedintermsofcomponents,thewaythatcomp

3、onentsareconnectedtoeachother,2.2Systemarchitecturesthedataexchangedbetweencomponents,andfinallyshowtheseelementsarejointlyconfiguredintoasystem.2.3ArchitecturesversusmiddlewareAcomponentisamodularunitwith2.4Self-managementindistributedsystemswel

4、l-definedrequiredandprovidedinterfacesthatisreplaceablewithinitsenvironment.Aconnectorisamechanismthatmediatescommunication,coordination,orcooperationamongcomponents.E.g.,aconnectorcanbeformedbythefacilitiesforremoteprocedurecall,Messagepassing,orstr

5、eamingdata2.1ArchitecturalstylesSeveralArchitecutreStylesArchitecturalstyles(1/4):LayeredstyleUsingcomponentsandconnectors,wecancometovariousconfigurations,inturnhavebeenclassifiedintoarchitecturalsytles.LayeredarchitecturesObject-basedarchitecturesD

6、ata-centeredarchitecturesEvent-basedarchitecturesObservation:Layeredstyleisusedforclient-serversystem;2.1Architecturalstyles12013/10/15Architecturalstyles(2/4):objectbasedArchitecturalstyles(3/4):data-centeredBasicidea:Organizeintologicallydifferentco

7、mponents,andBasicidea:Processescommunicatethroughasubsequentlydistributethosecomponentsoverthevariousmachines.common(passiveoractive)repository.Asimportantasthelayeredandobject-basedarchitecturesE.g.,awealthofnetworkedapplicationshavebeendevelopedtha

8、trelyonashareddistributedfilesysteminwhichvirtuallyallcommunicationtakesplacethroughfiles.Observation:object-basedstylefordistributedobjectsystems.Likewise,Web-baseddistributedsystemsInessence,eachobjectcorrespondstowhatwehav