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November 28, 2009

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journaled file system

Last modified: Monday, January 29, 2001

A file system in which the hard disk maintains data integrity in the event of a system crash or if the system is otherwise halted abnormally. The journaled file system (JFS) maintains a log, or journal, of what activity has taken place in the main data areas of the disk; if a crash occurs, any lost data can be recreated because updates to the metadata in directories and bit maps have been written to a serial log. The JFS not only returns the data to the pre-crash configuration but also recovers unsaved data and stores it in the location it would have been stored in if the system had not been unexpectedly interrupted.

Journaled File System Technology for Linux From IBM
IBM's journaled file system technology, currently used in IBM enterprise servers, is designed for high-throughput server environments, key to running intranet and other high-performance e-business file servers.

Journaled File Systems for Linux
An in-depth look at the Reiserfs journaled filesystems for Linux, including an analysis of problems that may arise.

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File Management

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