9a49d3f3d3
The device_rebuild feature enables sequential reconstruction when
resilvering. Mirror vdevs can be rebuilt in LBA order which may
more quickly restore redundancy depending on the pools average block
size, overall fragmentation and the performance characteristics
of the devices. However, block checksums cannot be verified
as part of the rebuild thus a scrub is automatically started after
the sequential resilver completes.
The new '-s' option has been added to the `zpool attach` and
`zpool replace` command to request sequential reconstruction
instead of healing reconstruction when resilvering.
zpool attach -s <pool> <existing vdev> <new vdev>
zpool replace -s <pool> <old vdev> <new vdev>
The `zpool status` output has been updated to report the progress
of sequential resilvering in the same way as healing resilvering.
The one notable difference is that multiple sequential resilvers
may be in progress as long as they're operating on different
top-level vdevs.
The `zpool wait -t resilver` command was extended to wait on
sequential resilvers. From this perspective they are no different
than healing resilvers.
Sequential resilvers cannot be supported for RAIDZ, but are
compatible with the dRAID feature being developed.
As part of this change the resilver_restart_* tests were moved
in to the functional/replacement directory. Additionally, the
replacement tests were renamed and extended to verify both
resilvering and rebuilding.
Original-patch-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: John Poduska <jpoduska@datto.com>
Co-authored-by: Mark Maybee <mmaybee@cray.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10349
106 lines
3.1 KiB
Groff
106 lines
3.1 KiB
Groff
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.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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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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.\" 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 May 15, 2020
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.Dt ZPOOL-REPLACE 8
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.Os Linux
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.Sh NAME
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.Nm zpool Ns Pf - Cm replace
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.Nd Replace one device with another in a ZFS storage pool
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.Sh SYNOPSIS
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.Nm
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.Cm replace
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.Op Fl fsw
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.Oo Fl o Ar property Ns = Ns Ar value Oc
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.Ar pool Ar device Op Ar new_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 replace
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.Op Fl fsw
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.Op Fl o Ar property Ns = Ns Ar value
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.Ar pool Ar device Op Ar new_device
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.Xc
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Replaces
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.Ar old_device
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with
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.Ar new_device .
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This is equivalent to attaching
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.Ar new_device ,
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waiting for it to resilver, and then detaching
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.Ar old_device .
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Any in progress scrub will be cancelled.
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.Pp
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The size of
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.Ar new_device
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must be greater than or equal to the minimum size of all the devices in a mirror
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or raidz configuration.
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.Pp
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.Ar new_device
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is required if the pool is not redundant.
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If
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.Ar new_device
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is not specified, it defaults to
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.Ar old_device .
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This form of replacement is useful after an existing disk has failed and has
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been physically replaced.
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In this case, the new disk may have the same
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.Pa /dev
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path as the old device, even though it is actually a different disk.
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ZFS recognizes this.
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.Bl -tag -width Ds
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.It Fl f
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Forces use of
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.Ar new_device ,
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even if it appears to be in use.
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Not all devices can be overridden in this manner.
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.It Fl o Ar property Ns = Ns Ar value
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Sets the given pool properties. See the
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.Xr zpoolprops
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manual page for a list of valid properties that can be set.
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The only property supported at the moment is
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.Sy ashift .
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.It Fl s
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The
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.Ar new_device
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is reconstructed sequentially to restore redundancy as quickly as possible.
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Checksums are not verfied during sequential reconstruction so a scrub is
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started when the resilver completes.
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Sequential reconstruction is not supported for raidz configurations.
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.It Fl w
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Waits until the replacement has completed before returning.
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.El
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.El
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.Sh SEE ALSO
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.Xr zpool-detach 8 ,
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.Xr zpool-initialize 8 ,
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.Xr zpool-online 8 ,
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.Xr zpool-resilver 8
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