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ID:351243
大小:64.50 KB
页数:8页
时间:2017-07-26
《端口上的网络文件系统【外文翻译】》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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-areanetworks,astheperfor
2、mancewouldbeunacceptableandthebandwidthconsumptiontoohigh.However,efficientremotefileaccesswouldoftenbedesirableoversuchnetworks—particularlywhenhighlatencymakesremoteloginsessionsunresponsive.Ratherthanruninteractiveprogramssuchaseditorsremotely,userscouldruntheprogramslocallyandmanipulaterem
3、otefilesthroughthefilesystem.Soitwouldrequireanetworkfilesystemthatconsumeslessbandwidththanmostcurrentfilesystems.ThispaperpresentsLBFS,anetworkfilesystemdesignedforlow-bandwidthnetworks.LBFSexploitssimilaritiesbetweenfilesandversionsofthesamefiletosavebandwidth.Itavoidssendingdataoverthenetw
4、orkwhenthesamedatahasbeenalreadyfoundintheserver’sfilesystemortheclient’scache.Usingthistechniqueinconjunctionwithconventionalcompressionandcaching,LBFSconsumesoveranorderofmagnitudelessbandwidththantraditionalnetworkfilesystemsoncommonworkloads.Keywordsport;networkfile;LBFSfiles1.Introduction
5、ThispaperdescribesLBFS,anetworkfilesystemdesignedforlow-bandwidthnetworks.PeopletypicallyrunnetworkfilesystemsoverLANsorcampus-areanetworkswith10Mbit/secormorebandwidth.Datatransferssaturatebottlenecklinksandcauseunacceptabledelaysoverslower,wide-areanetworks.Interactiveprogramsfreeze,notrespo
6、ndingtouserinputduringfileI/O,batchcommandscantakemanytimestheirnormalexecutiontime,andotherlessaggressivenetworkapplicationsfitforbandwidth.UsersmustthereforeemploydifferenttechniquestoaccomplishwhattheywoulddothroughthefilesystemintheareaofLAN.PeopleoccasionallyworkovernetworksslowerthanLANs
7、.EventhroughbroadbandInternetaccess,apersonworkingathomeusuallyhasafractionofaMbit/secofupstreambandwidth.Acompanywhichownsbranchofficesandagenciesinseveralcitiesmayhavemanyuserscollaboratingoverasingle1.5Mbit/secT1line.Aconsultantconst
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