端口上的网络文件系统【外文翻译】

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1、本科毕业论文（设计）外文翻译ALow-bandwidthNetworkFileSystemAthichaMuthitacharoen,BenjieChen,andDavidMazi`eresMITLaboratoryforComputerScienceandNYUDepartmentofComputerScience{fathicha,benjieg}@lcs.mit.edu,dm@cs.nyu.eduAbstractUsersrarelyconsiderrunningnetworkfilesystemsoversloworwide-are

2、anetworks,astheperformancewouldbeunacceptableandthebandwidthconsumptiontoohigh.However,efficientremotefileaccesswouldoftenbedesirableoversuchnetworks—particularlywhenhighlatencymakesremoteloginsessionsunresponsive.Ratherthanruninteractiveprogramssuchaseditorsremotely,users

3、couldruntheprogramslocallyandmanipulateremotefilesthroughthefilesystem.Soitwouldrequireanetworkfilesystemthatconsumeslessbandwidththanmostcurrentfilesystems.ThispaperpresentsLBFS,anetworkfilesystemdesignedforlow-bandwidthnetworks.LBFSexploitssimilaritiesbetweenfilesandvers

4、ionsofthesamefiletosavebandwidth.Itavoidssendingdataoverthenetworkwhenthesamedatahasbeenalreadyfoundintheserver’sfilesystemortheclient’scache.Usingthistechniqueinconjunctionwithconventionalcompressionandcaching,LBFSconsumesoveranorderofmagnitudelessbandwidththantraditional

5、networkfilesystemsoncommonworkloads.Keywordsport;networkfile;LBFSfiles1.IntroductionThispaperdescribesLBFS,anetworkfilesystemdesignedforlow-bandwidthnetworks.PeopletypicallyrunnetworkfilesystemsoverLANsorcampus-areanetworkswith10Mbit/secormorebandwidth.Datatransferssaturat

6、ebottlenecklinksandcauseunacceptabledelaysoverslower,wide-areanetworks.Interactiveprogramsfreeze,notrespondingtouserinputduringfileI/O,batchcommandscantakemanytimestheirnormalexecutiontime,andotherlessaggressivenetworkapplicationsfitforbandwidth.Usersmustthereforeemploydif

7、ferenttechniquestoaccomplishwhattheywoulddothroughthefilesystemintheareaofLAN.PeopleoccasionallyworkovernetworksslowerthanLANs.EventhroughbroadbandInternetaccess,apersonworkingathomeusuallyhasafractionofaMbit/secofupstreambandwidth.Acompanywhichownsbranchofficesandagencies

8、inseveralcitiesmayhavemanyuserscollaboratingoverasingle1.5Mbit/secT1line.Aconsultantconst