|tristate "NILFS2 file system support"
|NILFS2 is a log-structured file system (LFS) supporting continuous
|snapshotting. In addition to versioning capability of the entire
|file system, users can even restore files mistakenly overwritten or
|destroyed just a few seconds ago. Since this file system can keep
|consistency like conventional LFS, it achieves quick recovery after
|NILFS2 creates a number of checkpoints every few seconds or per
|synchronous write basis (unless there is no change). Users can
|select significant versions among continuously created checkpoints,
|and can change them into snapshots which will be preserved for long
|periods until they are changed back to checkpoints. Each
|snapshot is mountable as a read-only file system concurrently with
|its writable mount, and this feature is convenient for online backup.
|Some features including atime, extended attributes, and POSIX ACLs,
|are not supported yet.
|To compile this file system support as a module, choose M here: the
|module will be called nilfs2. If unsure, say N.