DVR网络文件系统的设计与实现  

Research and Implementation of DVR Network File System

作　　者：詹玲[1] 王兵[2] 

机构地区：[1]华中科技大学计算机学院信息存储系统教育部重点实验室,湖北武汉430074 [2]上海理工大学信息化办公室,上海200093

出　　处：《小型微型计算机系统》2008年第9期1684-1687,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60603075)资助;国家"九七三"重点基础研究发展计划项目(2004CB318203)资助

摘　　要：随着多媒体技术和网络技术的快速发展,融合数字录像、DVD播放、视频点播和网络共享等功能的DVD录像机(DVD Recorder:DVR)正成为新的研究热点,DVR网络信息共享也越来越受到人们的重视.通过分析DVR文件存储和文件访问的特点,在现有的TCP/IP协议和FAT32文件系统的基础上,针对DVR设计了一种高性能的DVR网络文件系统DNFS(DVR Net-work File System).在百兆以太网环境下对DNFS性能进行了测试,测试结果表明,DNFS随机读的性能同SMB(Server Mes-sage Block Protocol)相接近,而DNFS顺序读的性能要比SMB高10-20%左右.With the rapid development of the multimedia technology and network technology, integrating the functions of digital recorder, DVD playback, video on demand and network share, ete, DVD Recorder is becoming a new research focus, the network information sharing of DVD Recorder is paid more attention to. On the basis of TCP/IP protocol and FAT32 file system, through analyzing the characteristics of file storage and file access of DVD Recorder, a kind of high-performance network file system which aiming at DVD Recorder is designed. The performance of DVD Recorder is tested under the environment of 100M Ethernet, the test result shows, that the performance of randomly reading of the network file system and Server Message Block Protocol （SMB） are similar, and the performance of sequentially reading is about 10-20% higher than SMB.

关 键 词：DVD录像机 网络文件系统 多媒体 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]