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77f6826b83
This commit makes the L2ARC persistent across reboots. We implement a light-weight persistent L2ARC metadata structure that allows L2ARC contents to be recovered after a reboot. This significantly eases the impact a reboot has on read performance on systems with large caches. Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: George Wilson <gwilson@delphix.com> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Co-authored-by: Saso Kiselkov <skiselkov@gmail.com> Co-authored-by: Jorgen Lundman <lundman@lundman.net> Co-authored-by: George Amanakis <gamanakis@gmail.com> Ported-by: Yuxuan Shui <yshuiv7@gmail.com> Signed-off-by: George Amanakis <gamanakis@gmail.com> Closes #925 Closes #1823 Closes #2672 Closes #3744 Closes #9582
67 lines
1.9 KiB
Groff
67 lines
1.9 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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.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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.\" or http://www.opensolaris.org/os/licensing.
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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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.\" 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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.\"
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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 August 9, 2019
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.Dt ZPOOL-LABELCLEAR 8
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.Os Linux
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.Sh NAME
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.Nm zpool Ns Pf - Cm labelclear
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.Nd Removes ZFS label information from the specified physical device
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.Sh SYNOPSIS
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.Nm
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.Cm labelclear
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.Op Fl f
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.Ar device
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.Sh DESCRIPTION
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.Bl -tag -width Ds
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.It Xo
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.Nm
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.Cm labelclear
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.Op Fl f
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.Ar device
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.Xc
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Removes ZFS label information from the specified
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.Ar device .
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If the
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.Ar device
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is a cache device, it also removes the L2ARC header
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(persistent L2ARC). The
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.Ar device
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must not be part of an active pool configuration.
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.Bl -tag -width Ds
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.It Fl f
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Treat exported or foreign devices as inactive.
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.El
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.El
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.Sh SEE ALSO
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.Xr zpool-destroy 8 ,
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.Xr zpool-detach 8 ,
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.Xr zpool-remove 8 ,
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.Xr zpool-replace 8
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