Chapter 12 - File management. After studying this chapter, you should be able to: Describe the basic concepts of files and file systems, understand the principal techniques for file organization and access, define B-trees, explain file directories, understand the requirements for file sharing,. | Chapter 12 File Management Dave Bremer Otago Polytechnic, . ©2008, Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings These slides are intended to help a teacher develop a presentation. This PowerPoint covers the entire chapter and includes too many slides for a single delivery. Professors are encouraged to adapt this presentation in ways which are best suited for their students and environment. 1 Roadmap Overview File organisation and Access File Directories File Sharing Record Blocking Secondary Storage Management File System Security Unix File Management Linux Virtual File System Windows File System We begin with an overview, followed by a look at various file organization schemes. Although file organization is generally beyond the scope of the operating system, it is essential to have a general understanding of the common alternatives to appreciate some of the design tradeoffs involved in file management. The remainder of this chapter looks | Chapter 12 File Management Dave Bremer Otago Polytechnic, . ©2008, Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings These slides are intended to help a teacher develop a presentation. This PowerPoint covers the entire chapter and includes too many slides for a single delivery. Professors are encouraged to adapt this presentation in ways which are best suited for their students and environment. 1 Roadmap Overview File organisation and Access File Directories File Sharing Record Blocking Secondary Storage Management File System Security Unix File Management Linux Virtual File System Windows File System We begin with an overview, followed by a look at various file organization schemes. Although file organization is generally beyond the scope of the operating system, it is essential to have a general understanding of the common alternatives to appreciate some of the design tradeoffs involved in file management. The remainder of this chapter looks at other topics in file management. 2 Files Files are the central element to most applications The File System is one of the most important part of the OS to a user Desirable properties of files: Long-term existence Sharable between processes Structure In most applications, the file is the central element. From the user’s point of view, one of the most important parts of an operating system is the file system. The file system provides the resource abstractions typically associated with secondary storage. Desirable properties include Long-term existence: Files are stored on disk or other secondary storage and do not disappear when a user logs off. Sharable between processes: Files have names and can have associated access permissions that permit controlled sharing. Structure: Depending on the file system, a file can have an internal structure that is convenient for particular applications. In addition, files can be organized into hierarchical or more complex structure to reflect the .
