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国外留学计算机专业论文

时间:2015-08-03 16:32来源:www.ukthesis.org 作者:英国论文网 点击联系客服: 客服:Damien
文件系统
 
部件-A
 
问题一。写一个shell程序输入名称的目录,在目录中显示出来,扩展名为“所有txt文件的内容。”。
 
A1。
 
问题二。证明的声明:“Linux日志文件系统的支持。”
 
A2。文件系统是操作系统中最重要的部分之一。该文件系统存储和管理磁盘驱动器上的用户数据,并确保从存储中读取的数据与原先写的是相同的。除了在文件中存储用户数据,文件系统还创建和管理有关文件和关于自己的信息。除了保证所有数据的完整性,文件系统也将是非常可靠的,并且具有非常良好的性能。
 
在过去的几年中,ext2事实上已经成为Linux机器的文件系统。这是强大的,可靠的,适合大多数部署。然而,作为Linux在越来越多的大型服务器和计算环境渐渐取代UNIX等操作系统,EXT2被推到了极限。
 
The file system
 
PART-A
 
Q1. Write a Shell program that inputs the name of a directory and displays the contents of all files in that directory that have the extension ".txt".
 
A1.
 
Q2. Justify the statement: "Linux supports journaling file systems."
 
A2. The file system is one of the most important parts of an operating system. The file system stores and manages user data on disk drives, and ensures that what's read from storage is identical to what was originally written. In addition to storing user data in files, the file system also creates and manages information about files and about itself. Besides guaranteeing the integrity of all that data, file systems are also expected to be extremely reliable and have very good performance.
 
For the past several years, Ext2 has been the de facto file system for most Linux machines. It's robust, reliable, and suitable for most deployments. However, as Linux displaces Unix and other operating systems in more and more large server and computing environments, Ext2 is being pushed to its limits. In fact, many now common requirements - large hard-disk partitions, quick recovery from crashes, high-performance I/O, and the need to store thousands and thousands of files representing terabytes of data - exceed the abilities of Ext2.
 
Fortunately, a number of other Linux file systems take up where Ext2 leaves off. Indeed, Linux now offers four alternatives to Ext2: Ext3, ReiserFS, XFS, and JFS. In addition to meeting some or all of the requirements listed above, each of these alternative file systems also supportsjournaling, a feature certainly demanded by enterprises, but beneficial to anyone running Linux. A journaling file system can simplify restarts, reduce fragmentation, and accelerate I/O.(责任编辑:huiyinad)


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