Comment Re:Will it work for BIG files? (Score 1) 38
Snapshots can take a lot of space!
Imagine you have a 5 GB movie file that you snapshot. If you then try to delete the file, you will not recover the space, because the snapshot holds onto the file. Effectively, the snapshot is consuming 5 GB.
"Unsung" asks whether ZFS is smart about how it removes snapshots as space is needed. This is a reasonable question with a trivial answer: no, because ZFS never removes snapshots, even if space is needed. It is the user's responsibility to remove snapshots.
