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File management systems

The file management system, FMSgif is the subsystem of an operating system that manages the data storage organization on disk, and provides services to processes related to file access. In this sense, it interfaces the application programs with the low-level media-I/O (e.g. disk I/O) subsystem, freeing on the application programmers from having to deal with low-level intricacies and allowing them to implement I/O using convenient data-organizational abstractions like files and records. On the other end, the FMS services often is the only way thorough which applications can access the data stored in the files, thus achieving an encapsulation of the data themselves which can be usefully exploited for the purposes of data protection, maintenance and control.

We can summarize the aims of a FMS as follows:

From the point of view of an end user (or application) an FMS typically provides the following functionalities:




next up previous contents Back to Operating Systems Home Page
Next: FMS Architecture Up: File Management - I Previous: Some terminology

Franco Callari