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The commit replaces all findings of the link: http://www.opensolaris.org/os/licensing with this one: https://opensource.org/licenses/CDDL-1.0 Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de> Closes #13619
227 lines
7.5 KiB
Groff
227 lines
7.5 KiB
Groff
.\"
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.\" CDDL HEADER START
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.\"
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.\" The contents of this file are subject to the terms of the
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.\" Common Development and Distribution License (the "License").
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.\" You may not use this file except in compliance with the License.
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.\"
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.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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.\" or https://opensource.org/licenses/CDDL-1.0.
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.\" See the License for the specific language governing permissions
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.\" and limitations under the License.
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.\"
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.\" When distributing Covered Code, include this CDDL HEADER in each
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.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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.\" If applicable, add the following below this CDDL HEADER, with the
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.\" fields enclosed by brackets "[]" replaced with your own identifying
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.\" information: Portions Copyright [yyyy] [name of copyright owner]
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.\"
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.\" CDDL HEADER END
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.\"
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.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
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.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
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.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved.
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.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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.\" Copyright (c) 2014, Joyent, Inc. All rights reserved.
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.\" Copyright (c) 2014 by Adam Stevko. All rights reserved.
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.\" Copyright (c) 2014 Integros [integros.com]
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.\" Copyright 2019 Richard Laager. All rights reserved.
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.\" Copyright 2018 Nexenta Systems, Inc.
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.\" Copyright 2019 Joyent, Inc.
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.\"
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.Dd March 16, 2022
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.Dt ZFS-DESTROY 8
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.Os
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.
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.Sh NAME
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.Nm zfs-destroy
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.Nd destroy ZFS dataset, snapshots, or bookmark
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.Sh SYNOPSIS
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.Nm zfs
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.Cm destroy
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.Op Fl Rfnprv
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.Ar filesystem Ns | Ns Ar volume
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.Nm zfs
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.Cm destroy
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.Op Fl Rdnprv
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.Ar filesystem Ns | Ns Ar volume Ns @ Ns Ar snap Ns
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.Oo % Ns Ar snap Ns Oo , Ns Ar snap Ns Oo % Ns Ar snap Oc Oc Oc Ns …
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.Nm zfs
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.Cm destroy
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.Ar filesystem Ns | Ns Ar volume Ns # Ns Ar bookmark
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.
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.Sh DESCRIPTION
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.Bl -tag -width ""
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.It Xo
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.Nm zfs
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.Cm destroy
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.Op Fl Rfnprv
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.Ar filesystem Ns | Ns Ar volume
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.Xc
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Destroys the given dataset.
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By default, the command unshares any file systems that are currently shared,
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unmounts any file systems that are currently mounted, and refuses to destroy a
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dataset that has active dependents
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.Pq children or clones .
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.Bl -tag -width "-R"
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.It Fl R
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Recursively destroy all dependents, including cloned file systems outside the
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target hierarchy.
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.It Fl f
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Forcibly unmount file systems.
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This option has no effect on non-file systems or unmounted file systems.
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.It Fl n
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Do a dry-run
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.Pq Qq No-op
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deletion.
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No data will be deleted.
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This is useful in conjunction with the
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.Fl v
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or
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.Fl p
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flags to determine what data would be deleted.
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.It Fl p
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Print machine-parsable verbose information about the deleted data.
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.It Fl r
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Recursively destroy all children.
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.It Fl v
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Print verbose information about the deleted data.
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.El
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.Pp
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Extreme care should be taken when applying either the
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.Fl r
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or the
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.Fl R
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options, as they can destroy large portions of a pool and cause unexpected
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behavior for mounted file systems in use.
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.It Xo
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.Nm zfs
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.Cm destroy
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.Op Fl Rdnprv
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.Ar filesystem Ns | Ns Ar volume Ns @ Ns Ar snap Ns
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.Oo % Ns Ar snap Ns Oo , Ns Ar snap Ns Oo % Ns Ar snap Oc Oc Oc Ns …
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.Xc
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The given snapshots are destroyed immediately if and only if the
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.Nm zfs Cm destroy
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command without the
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.Fl d
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option would have destroyed it.
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Such immediate destruction would occur, for example, if the snapshot had no
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clones and the user-initiated reference count were zero.
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.Pp
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If a snapshot does not qualify for immediate destruction, it is marked for
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deferred deletion.
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In this state, it exists as a usable, visible snapshot until both of the
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preconditions listed above are met, at which point it is destroyed.
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.Pp
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An inclusive range of snapshots may be specified by separating the first and
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last snapshots with a percent sign.
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The first and/or last snapshots may be left blank, in which case the
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filesystem's oldest or newest snapshot will be implied.
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.Pp
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Multiple snapshots
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.Pq or ranges of snapshots
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of the same filesystem or volume may be specified in a comma-separated list of
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snapshots.
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Only the snapshot's short name
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.Po the part after the
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.Sy @
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.Pc
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should be specified when using a range or comma-separated list to identify
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multiple snapshots.
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.Bl -tag -width "-R"
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.It Fl R
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Recursively destroy all clones of these snapshots, including the clones,
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snapshots, and children.
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If this flag is specified, the
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.Fl d
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flag will have no effect.
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.It Fl d
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Destroy immediately.
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If a snapshot cannot be destroyed now, mark it for deferred destruction.
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.It Fl n
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Do a dry-run
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.Pq Qq No-op
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deletion.
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No data will be deleted.
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This is useful in conjunction with the
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.Fl p
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or
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.Fl v
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flags to determine what data would be deleted.
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.It Fl p
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Print machine-parsable verbose information about the deleted data.
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.It Fl r
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Destroy
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.Pq or mark for deferred deletion
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all snapshots with this name in descendent file systems.
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.It Fl v
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Print verbose information about the deleted data.
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.Pp
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Extreme care should be taken when applying either the
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.Fl r
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or the
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.Fl R
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options, as they can destroy large portions of a pool and cause unexpected
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behavior for mounted file systems in use.
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.El
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.It Xo
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.Nm zfs
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.Cm destroy
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.Ar filesystem Ns | Ns Ar volume Ns # Ns Ar bookmark
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.Xc
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The given bookmark is destroyed.
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.El
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.
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.Sh EXAMPLES
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.\" These are, respectively, examples 3, 10, 15 from zfs.8
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.\" Make sure to update them bidirectionally
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.Ss Example 1 : No Creating and Destroying Multiple Snapshots
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The following command creates snapshots named
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.Ar yesterday No of Ar pool/home
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and all of its descendent file systems.
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Each snapshot is mounted on demand in the
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.Pa .zfs/snapshot
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directory at the root of its file system.
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The second command destroys the newly created snapshots.
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.Dl # Nm zfs Cm snapshot Fl r Ar pool/home Ns @ Ns Ar yesterday
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.Dl # Nm zfs Cm destroy Fl r Ar pool/home Ns @ Ns Ar yesterday
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.
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.Ss Example 2 : No Promoting a ZFS Clone
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The following commands illustrate how to test out changes to a file system, and
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then replace the original file system with the changed one, using clones, clone
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promotion, and renaming:
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm create Ar pool/project/production
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populate /pool/project/production with data
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.No # Nm zfs Cm snapshot Ar pool/project/production Ns @ Ns Ar today
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.No # Nm zfs Cm clone Ar pool/project/production@today pool/project/beta
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make changes to /pool/project/beta and test them
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.No # Nm zfs Cm promote Ar pool/project/beta
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.No # Nm zfs Cm rename Ar pool/project/production pool/project/legacy
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.No # Nm zfs Cm rename Ar pool/project/beta pool/project/production
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once the legacy version is no longer needed, it can be destroyed
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.No # Nm zfs Cm destroy Ar pool/project/legacy
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.Ed
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.
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.Ss Example 3 : No Performing a Rolling Snapshot
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The following example shows how to maintain a history of snapshots with a
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consistent naming scheme.
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To keep a week's worth of snapshots, the user destroys the oldest snapshot,
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renames the remaining snapshots, and then creates a new snapshot, as follows:
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.Bd -literal -compact -offset Ds
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.No # Nm zfs Cm destroy Fl r Ar pool/users@7daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@6daysago No @ Ns Ar 7daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@5daysago No @ Ns Ar 6daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@4daysago No @ Ns Ar 5daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@3daysago No @ Ns Ar 4daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@2daysago No @ Ns Ar 3daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@yesterday No @ Ns Ar 2daysago
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.No # Nm zfs Cm rename Fl r Ar pool/users@today No @ Ns Ar yesterday
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.No # Nm zfs Cm snapshot Fl r Ar pool/users Ns @ Ns Ar today
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.Ed
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.
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.Sh SEE ALSO
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.Xr zfs-create 8 ,
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.Xr zfs-hold 8
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