versioning file system in a sentence

• ;Versioning file system : A versioning filesystem keeps track of all changes to a file and makes those changes accessible to the user.
• This functionality, however, takes place at the application layer, not the filesystem layer; Lion does not incorporate a true versioning file system.
• Unlike a true versioning file system, however, users cannot trigger the creation of new versions of an individual file, only the entire volume.
• The end result is similar to a versioning file system, allowing any file to be retrieved as it existed at the time any of the snapshots was made.
• Also, many versioning file systems ( such as the one in VMS ) implicitly save a version of files each time they are changed; systems using a snapshotting approach like Windows only capture the state periodically.
• Note that if you wanted to be able to store all the previous revisions of a file then a versioning file system can do that .-- Talk 00 : 16, 13 February 2010 ( UTC)
• :Not quite change control, but there are Versioning file systems, which keep track of every change, and filesystems like ZFS, btrfs, and Talk 14 : 34, 25 August 2012 ( UTC)
• As a side-effect, whereas the owner of a file can create new versions in a versioning file system, only a system administrator or a backup operator can create new snapshots ( or control when new snapshots are taken ), because this requires control of the entire volume rather than an individual file.
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