| config NILFS2_FS | |
| tristate "NILFS2 file system support (EXPERIMENTAL)" | |
| depends on BLOCK && EXPERIMENTAL | |
| select CRC32 | |
| help | |
| 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 | |
| system crashes. | |
| 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. |