dss creates hardlink-based snapshots of a given directory on a remote or local host using rsync's link-dest feature. dss is admin friendly: It is easy to configure and needs little attention once dss is configured to run in daemon mode because dss keeps track of the available disk space and removes snapshots if disk space becomes sparse or snapshots become older than the specified time. It's also user-friendly because users can browse the snapshot directories and see the contents of the file system at the time the snapshot was taken. For example, users can simply copy data from the snapshot directory back to the live system in case they deleted files by accident. Snapshot pruning takes place in a dyadic fashion: Many recent snapshots are available, but the number of snapshots per time interval decreases exponentially. For example, one can configure dss so that it keeps 16 snapshots not older than one week, 8 snapshots between one and two weeks old, 4 snapshots between two and three weeks old and so on.