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  • > will snapshot everything under mypool/HOME, but INCLUDING mypool/HOME, which is mounted as /home? Why I am asking this question, because I added a 30GB to /home and nothing changed in sizes in zfs list -t snapshot, after creating a new Commented Feb 9, 2017 at 9:18
  • Yes, it will snapshot every dataset descendant of mypool/home Commented Feb 9, 2017 at 9:22
  • Thanks for answer. I hope snapshoting docker is also safe in this way Commented Feb 9, 2017 at 9:33
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    The snapshotting will work the same way for docker. If you are really new and uncomfortable with this stuff, create a dummy file system, take snapshots while adding data between each snapshot. cd into the snapshots (under the hidden .zfs folder) and look around. Play around with destroying snapshots, doing rollbacks, clones, promoting. With a dummy data set you have nothing to loose. The ZFS man page should have all you need to get started. You will be much more comfortable with ZFS if you do some playing around with it like this. Commented Feb 9, 2017 at 20:16