基于位图示法的NSFS文件系统设计  

Design of NSFS file system based on bitmap method

作　　者：折楠 徐晓光 陈晓磊 邢亮 

机构地区：[1]中航工业西安计算技术研究所,陕西西安710119

出　　处：《现代电子技术》2013年第14期89-92,95,共5页Modern Electronics Technique

基　　金：总装预研项目(51315030101)

摘　　要：文件系统是操作系统进行数据存储的核心功能组件,它具有数据的存储和数据的管理功能。失去了文件系统的操作系统只能进行数据计算处理,而不能存储计算结果,所有重要的数据和信息在计算机断电的时候都会消失。可以说文件系统是现代操作系统不可分割的基本功能组件。在信息化高速发展的今天,嵌入式操作系统技术中的文件系统有着越来越重要的地位,航空领域的嵌入式操作系统必须提供一个方便易用高性能高可靠的文件系统。NSFS文件系统是基于位图示法设计的具有高可用性的文件系统。它的结构简洁,可以根据文件大小自适应地分配簇大小,空间浪费极小,具有良好的性能和很大的灵活性,并且具备较高的可靠性。The file system is the core function element for data storage of an operating system. It is applied to data storage and data management. Any operating system without file system can only calculate data, but the calculated results can not re-side in random access memory, and all the data and information will be lost after computer power off. Actually file system is a necessary functional component of a modern operating system. As information technology is improving rapidly nowadays, the file system in the embedded operating system has been more and more important in various fields. In aviation industry, the embed-ded operating system must provide a convenient file system which should be easy to use and provide high performance. NSFS is a file system with high availability based on bitmap method. It is designed as a concise architecture. Moreover, the cluster size can be allocated based on the file size adaptively with minimal wasted storage space. In summary, NSFS is good at performance with high flexibility and reliability.

关 键 词：位图示法 文件系统 操作系统 NSFS文件系统 

分 类 号：TN911-34[电子电信—通信与信息系统] TP316.2[电子电信—信息与通信工程]