lecture26-chapter12 - OperatingSystems Lecture26...

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Operating Systems Lecture 26: File Management Anda Iamnitchi [email protected] 1
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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 2
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Typical Operations File management system consists of system utility programs that run as privileged applications Concerned with secondary storage File systems also provide functions which can be performed on files, typically: Create Delete Open Close Read Write 3
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File Management Systems Provides services to users and applications in the use of files The way a user or application accesses files Programmer does not need to develop file management software 4
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Objectives for a File Management System Meet the data management needs of the user Guarantee that the data in the file are valid Optimize performance Provide I/O support for a variety of storage device types Minimize lost or destroyed data Provide a standardized set of I/O interface routines to user processes Provide I/O support for multiple users (if needed) 5
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Typical software organization 6
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Typical software organization 1. Start I/O operations on a device 2. Communicate at the lowest level directly with peripheral devices or their controllers or channels 7
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1. Deals with
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This note was uploaded on 02/18/2012 for the course COP 4600 taught by Professor Andaiamnitchi during the Fall '08 term at University of South Florida.

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lecture26-chapter12 - OperatingSystems Lecture26...

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