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1、AReliableandPortableMultimediaFileSystemJoo-YoungHwang,Jae-KyoungBae,AlexanderKirnasov,Min-SungJang,Ha-YeongKimSamsungElectronics,Suwon,Korea{jooyoung.hwang,jaekyoung.bae,a78.kirnasov}@samsung.com{minsung.jang,hayeong.kim}@samsung.comAbstractbeingusedforvariou
2、sCEdevicesfromper-sonalvideorecorder(PVR)tohandheldcam-corders,portablemediaplayers,andmobileInthispaperwedescribedesignandimple-phones.Filesystemsforsuchdeviceshavere-mentationofadatabase-assistedmultimediaquirementsformultimediaextensions,reliabil-filesystem,
3、namedasXPRESS(eXtendibleity,portabilityandmaintainability.PortableReliableEmbeddedStorageSystem).InXPRESS,conventionalfilesystemmetadataMultimediaExtensionMultimediaextensionslikeinodes,directories,andfreespaceinfor-requiredforCEdevicesarenon-lineareditingmatio
4、narehandledbytransactionaldatabase,andadvancedfileindexing.AsCEdeviceswhichguaranteesmetadataconsistencyagainstarebeingcapableofcapturingandstoringA/Vvariouskindsofsystemfailures.Filesys-data,consumerswanttopersonalizemediadatatemimplementationandupgradearemade
5、easyaccordingtotheirpreference.Theymaketheirbecausemetadataschemecanbechangedbyowntitlesandshareswiththeirfriendsviain-modifyingdatabaseschema.Moreover,us-ternet.PVRuserswanttoeditrecordedstreamsingwell-defineddatabasetransactionprogram-toremoveadvertisementand
6、uninterestedpor-minginterface,complextransactionslikenon-tions.Non-lineareditingsystemhadbeenonlylineareditingoperationsaredevelopedeasily.necessaryinthestudiotoproducebroadcastSinceXPRESSrunsinuserlevel,itisportablecontentsbutitwillbenecessaryalsoforcon-tovar
7、iousOSes.XPRESSshowsstreamingsumers.MultimediafilesystemforCEdevicesperformancecompetitivetoLinuxXFSreal-shouldsupportnon-lineareditingoperationsef-timeextensiononLinux2.6.12,whichindi-ficiently.Filesystemshouldsupportfileindex-catesthefilesystemarchitecturecanpro
8、videingbycontent-awareattributes,forexampletheperformance,maintainability,andreliabilityal-directorandactor/actressofamovieclip.together.ReliabilityOnoccurrenceofsystemfail-ures(e.
