Log-structured file system: Difference between revisions

Revision as of 05:38, 4 June 2010

Revision as of 19:10, 10 June 2010

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* [[LinLogFS]] (formerly dtfs) and LFS ([http://logfs.sourceforge.net/ http://logfs.sourceforge.net/]) are log-structured file system implementations for Linux. The latter was part of [[Google Summer of Code|Google Summer of Code 2005]]. Both projects have been abandoned.

* [http://aiya.ms.mff.cuni.cz/lfs LFS] is another log-structured file system for Linux developed by Charles University, Prague. It was to include support for snapshots and indexed directories, but development has since ceased.

* [[LogFS]] is a scalable flash filesystem for [[Linux]], intended to replace [[JFFS2]] (in development).

* [[UBIFS]] is a filesystem for [[Linux]],raw NAND flash media and also intended to replace [[JFFS2]] (in development).

* [[ULFS]] is a User-Level Log-structured File System (http://ulfs.sf.net) Usingusing FUSE (http://fuse.sf.net).

Some kinds of storage media, such as [[flash memory]] and [[CD-RW]], slowly degrade as they are written to and have a limited number of erase/write cycles at any one ___location. Log-structured file systems are sometimes used on these media because they make fewer in-place writes and thus prolong the life of the device by [[wear leveling]]. The more common such file systems include: