For the IBM Journaled File System, see JFS (file system).
A journaling file system is a file system that keeps track of changes not yet committed to the file system's main part by recording the goal of such changes in a data structure known as a "journal", which is usually a circular log. In the event of a system crash or power failure, such file systems can be brought back online more quickly with a lower likelihood of becoming corrupted.[1][2]
Depending on the actual implementation, a journaling file system may only keep track of stored metadata, resulting in improved performance at the expense of increased possibility for data corruption. Alternatively, a journaling file system may track both stored data and related metadata, while some implementations allow selectable behavior in this regard.[3]
^Jones, M Tim (June 4, 2008), Anatomy of Linux journaling file systems, IBM DeveloperWorks, archived from the original on February 21, 2009, retrieved April 13, 2009
^Arpaci-Dusseau, Remzi H.; Arpaci-Dusseau, Andrea C. (January 21, 2014), Crash Consistency: FSCK and Journaling(PDF), Arpaci-Dusseau Books, archived (PDF) from the original on January 24, 2014, retrieved January 22, 2014
^"tune2fs(8) – Linux man page". linux.die.net. Archived from the original on February 25, 2015. Retrieved February 20, 2015.
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