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ZFS-PROMOTE(8) FreeBSD System Manager's Manual ZFS-PROMOTE(8)
NAME
zfs-promote - promote clone dataset to no longer depend on origin
snapshot
SYNOPSIS
zfs promote clone
DESCRIPTION
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.
EXAMPLES
Example 1: Promoting a ZFS Clone
The following commands illustrate how to test out changes to a file
system, and then replace the original file system with the changed one,
using clones, clone promotion, and renaming:
# zfs create pool/project/production
populate /pool/project/production with data
# zfs snapshot pool/project/production@today
# zfs clone pool/project/production@today pool/project/beta
make changes to /pool/project/beta and test them
# zfs promote pool/project/beta
# zfs rename pool/project/production pool/project/legacy
# zfs rename pool/project/beta pool/project/production
once the legacy version is no longer needed, it can be destroyed
# zfs destroy pool/project/legacy
SEE ALSO
zfs-clone(8), zfs-rename(8)
FreeBSD 14.0-RELEASE-p11 March 16, 2022 FreeBSD 14.0-RELEASE-p11