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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
113 lines
3.5 KiB
Groff
113 lines
3.5 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) 2007, Sun Microsystems, Inc. All Rights Reserved.
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.\" Copyright (c) 2012, 2018 by Delphix. All rights reserved.
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.\" Copyright (c) 2012 Cyril Plisko. All Rights Reserved.
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.\" Copyright (c) 2017 Datto Inc.
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.\" Copyright (c) 2018 George Melikov. All Rights Reserved.
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.\" Copyright 2017 Nexenta Systems, Inc.
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.\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
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.\"
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.Dd May 27, 2021
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.Dt ZPOOL-TRIM 8
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.Os
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.
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.Sh NAME
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.Nm zpool-trim
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.Nd initiate TRIM of free space in ZFS storage pool
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.Sh SYNOPSIS
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.Nm zpool
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.Cm trim
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.Op Fl dw
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.Op Fl r Ar rate
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.Op Fl c Ns | Ns Fl s
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.Ar pool
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.Oo Ar device Ns Oc Ns …
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.
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.Sh DESCRIPTION
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Initiates an immediate on-demand TRIM operation for all of the free space in
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a pool.
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This operation informs the underlying storage devices of all blocks
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in the pool which are no longer allocated and allows thinly provisioned
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devices to reclaim the space.
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.Pp
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A manual on-demand TRIM operation can be initiated irrespective of the
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.Sy autotrim
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pool property setting.
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See the documentation for the
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.Sy autotrim
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property above for the types of vdev devices which can be trimmed.
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.Bl -tag -width Ds
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.It Fl d , -secure
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Causes a secure TRIM to be initiated.
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When performing a secure TRIM, the
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device guarantees that data stored on the trimmed blocks has been erased.
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This requires support from the device and is not supported by all SSDs.
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.It Fl r , -rate Ar rate
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Controls the rate at which the TRIM operation progresses.
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Without this
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option TRIM is executed as quickly as possible.
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The rate, expressed in bytes
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per second, is applied on a per-vdev basis and may be set differently for
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each leaf vdev.
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.It Fl c , -cancel
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Cancel trimming on the specified devices, or all eligible devices if none
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are specified.
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If one or more target devices are invalid or are not currently being
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trimmed, the command will fail and no cancellation will occur on any device.
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.It Fl s , -suspend
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Suspend trimming on the specified devices, or all eligible devices if none
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are specified.
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If one or more target devices are invalid or are not currently being
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trimmed, the command will fail and no suspension will occur on any device.
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Trimming can then be resumed by running
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.Nm zpool Cm trim
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with no flags on the relevant target devices.
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.It Fl w , -wait
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Wait until the devices are done being trimmed before returning.
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.El
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.Sh PERIODIC TRIM
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On machines using systemd, trim timers can be enabled on a per-pool basis.
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.Nm weekly
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and
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.Nm monthly
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timer units are provided.
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.Bl -tag -width Ds
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.It Xo
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.Xc
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.Nm systemctl
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.Cm enable
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.Cm zfs-trim-\fIweekly\fB@\fIrpool\fB.timer
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.Cm --now
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.It Xo
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.Xc
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.Nm systemctl
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.Cm enable
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.Cm zfs-trim-\fImonthly\fB@\fIotherpool\fB.timer
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.Cm --now
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.El
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.
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.Sh SEE ALSO
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.Xr systemd.timer 5 ,
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.Xr zpoolprops 7 ,
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.Xr zpool-initialize 8 ,
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.Xr zpool-wait 8
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