Provided by: zfsutils-linux_2.1.5-1ubuntu6_amd64 bug


     zfs-promote — promote clone dataset to no longer depend on origin snapshot


     zfs promote clone


     The zfs promote command makes it possible to destroy the dataset that the clone was created
     from.  The clone parent-child dependency relationship is reversed, so that the origin
     dataset becomes a clone of the specified dataset.

     The snapshot that was cloned, and any snapshots previous to this snapshot, are now owned by
     the promoted clone.  The space they use moves from the origin dataset to the promoted clone,
     so enough space must be available to accommodate these snapshots.  No new space is consumed
     by this operation, but the space accounting is adjusted.  The promoted clone must not have
     any conflicting snapshot names of its own.  The zfs rename subcommand can be used to rename
     any conflicting snapshots.


     zfs-clone(8), zfs-rename(8)