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200 8 1 1 Jo urnal of Chinese Co mpu er Sy s em s V ol . 29 N o. 1 2008 万继光, 吴龙树 ( , 430074) ( , 3100 18) - : @ . . . ; @ . . E mail jgw an mail hu s edu cn wl s cjlu edu cn : 随着网络上的数据呈爆炸性的增长, 数据安全性越来越受到重视. 针对数据安全性的需要, 设计并实现 一种基于 FT P 协议的网络备份系统N BS( N e w o rk Backup Sys em ) , 通过详细介绍这 个系统的整体设计方案, 着重分析 FT P 协议的性 能特点, 分析 FT P 小文件备份性能低的原因, 提出 一种提高小文件备份性能的批量备份性能优化方案, 并进行 详细的试 验, 对性能进行 测试与分析. : ; ; ( F T P ) : T P 303 : A : 1000-1220( 2008) 0 1-0 150-04 Analyse and Optimize of a Network Backup System WA N J i-g uang, WU L o ng -shu ( College of Comp uter Science Technology , H uazhong University of Science and Technology , Wuhan N ational Laborartory f or Op toelectronics, Wuhan 430074, China) ( Dep artment of athematics, ChinaJiliang University, H angzhou 3100 18, China) Abstract: Wi h he increasing explosiv ely of da a in in er ne , da a secur i y is being incr easingly r egar ded , W e R esear ch and im - plemen a ion of a N e w o rk Ba ckup Sys em . In his paper , W e in r oduced he desig n of he N e w or k Backup Sy s em in de ail , A nd in r oduced he design of he N e w or k Backup P ro o co l empha ically, A nd per for m a cor responding es ing and analy sis of perfo rmance on he N e w or k Backup Sys em , And pu for w ard a resolven fo r impr ov ing perfo rmance of small f ile ne w o rk backup . : ; ; Key words ne w o rk backup ne w o rk backup sys em f ile r ansf er pr o ocol 1 , N BS ( N e w or k Backup Sy s em) . 2 NBS , ; 3 FT P ; , . , 4 NBS . , , 2NBS . NBS . , ,