- A snapshot is considered redundant if it ether belongs to
- an interval greater than the maximum number of intervals,
- or if it belongs to an interval that already contains more
- than the desired number of snapshots.
+ A snapshot is considered outdated if it belongs to an interval
+ greater than the maximum number of intervals. It is said to be
+ redundant if it belongs to an interval that already contains
+ more than the desired number of snapshots. This command gets
+ rid of such snapshots.