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1、ReplicationforaDistributedMultimediaSystemGiwonOn1,MichaelZink1,MichaelLiepert1,CarstenGriwodz1,JensB.Schmitt1,RalfSteinmetz1,212KOM-IndustrialProcessandSystemCommunicationsIPSI,GermanNationalResearchCenterforDarmstadtUniversityofTechnologyInformationTechnologyMerckstrasse
2、25Dolivostrasse1564283Darmstadt,Germany4293Darmstadt,Germany0049-6151-1661620049-6151-869869AbstractThemaincontributionsofthispaperare(1)toidentifyReplicatingdataandservicesatmultiplenetworkedcom-thenewreplicationrequirementsfordistributedmultime-putersincreasestheservicea
3、vailabilityofdistributedsys-diasystems,and(2)tobuildareplicationmechanismfortems.Thispaperpresentsthedesignandimplementationdistributedmultimediasystems.Toachievethesetargets,architectureofareplicationmechanismforadistributedwefirststudythecharacteristicsofpresentationalme
4、diamultimediasystemmedianodewhichiscurrentlydevel-typeswhicharehandledinmedianodesystem[1],andopedasaninfrastructuretosharemultimedia-enhancedextractnewreplicaunitsandgranularitieswhichhavenei-teachingmaterialsamonglecturegroups.Withthereplica-therbeenconsiderednorsupporte
5、dinexistingreplicationtionmechanism,medianodeprovidesenhancedaccesstomechanisms.Furthermore,wegiveasurveyonexistingpresentationmaterialsinbothconnectedanddisconnectedreplicationmechanismsandidentifytheirfeaturesandlim-operationmodes.Themaincontributionofthispaperistheitati
6、ons.Byprototypingourproposedreplicationmecha-identificationofnewreplicationrequirementsindistrib-nisminmedianode,weproveitsprinciplefeasibilityandutedmediasystemsandamulticast-basedupdatepropaga-identifyfurtherresearchissuessuchashowtocombinethetionmechanismbywhichnotonlyt
7、heupdateeventsareconceptofqualityofservice(QoS)withreplicationmecha-signaled,butalsotheupdateddataareexchangedbetweennisms.replicationmanagers.Thestructureofthepaperisasfollows.InSection2,wepresentourreplicationsystemmodel.Aftergivingashortoverviewaboutmedianodearchitectur
8、e,wedefinethe1.Introductionscopeofourreplicationmechanisminmedianodeandpresentthecharacte
