3 ms·
What's a COW-tree? And which filesystems are COW-tree filesystems?
by davidmathers 17y ago
What's a COW-tree? And which filesystems are COW-tree filesystems?
- wmf 17y agoCopy-on-write tree. See WAFL, ZFS, and Btrfs.
- davidmathers 17y agoThere's one comparison to ZFS: One of the most noticeable features of NILFS is that it can “continuously and automatically save instantaneous states of the file system without interrupting service”. NILFS refers to these as checkpoints. In contrast, other file systems such as ZFS, can provide snapshots but they have to suspend operation to perform the snapshot operation. NILFS doesn’t have to do this. The snapshots (checkpoints) are part of the file system design itself.