中文摘要：

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，设计并实现了一种基于FTP协议的网络备份系统NBS（Network Backup System），通过详细介绍这个系统的整体设计方案，着重分析了FTP协议的性能特点，分析了FTP小文件备份性能低的原因，提出了一种提高小文件备份性能的批量备份性能优化方案，并进行了详细的试验，对性能进行了测试与分析．

英文摘要：

With the increasing explosively of data in internet, data security is being increasingly regarded ,We Research and implementation of a Network Backup System. In this paper, We introduced the design of the Network Backup System in detail, And introduced the design of the Network Backup Protocol emphatically, And perform a corresponding testing and analysis of performance on the Network Backup System,And put forward a resolvent for improving performance of small file network backup.