mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-26 19:19:32 +03:00
ccf89b39fe
It can be used to repair a ZFS file system corrupted by ZFS bug #12762. Use it like this: zfs send -c <DS> | \ zstream decompress <OBJECT>,<OFFSET>[,<COMPRESSION_ALGO>] ... | \ zfs recv <DST_DS> Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Allan Jude <allan@klarasystems.com> Signed-off-by: Alan Somers <asomers@gmail.com> Sponsored-by: Axcient Workaround for #12762 Closes #13256
169 lines
4.0 KiB
Groff
169 lines
4.0 KiB
Groff
.\"
|
|
.\" CDDL HEADER START
|
|
.\"
|
|
.\" The contents of this file are subject to the terms of the
|
|
.\" Common Development and Distribution License (the "License").
|
|
.\" You may not use this file except in compliance with the License.
|
|
.\"
|
|
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
.\" or http://www.opensolaris.org/os/licensing.
|
|
.\" See the License for the specific language governing permissions
|
|
.\" and limitations under the License.
|
|
.\"
|
|
.\" When distributing Covered Code, include this CDDL HEADER in each
|
|
.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
.\" If applicable, add the following below this CDDL HEADER, with the
|
|
.\" fields enclosed by brackets "[]" replaced with your own identifying
|
|
.\" information: Portions Copyright [yyyy] [name of copyright owner]
|
|
.\"
|
|
.\" CDDL HEADER END
|
|
.\"
|
|
.\" Copyright (c) 2020 by Delphix. All rights reserved.
|
|
.\"
|
|
.Dd March 25, 2022
|
|
.Dt ZSTREAM 8
|
|
.Os
|
|
.
|
|
.Sh NAME
|
|
.Nm zstream
|
|
.Nd manipulate ZFS send streams
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Cm dump
|
|
.Op Fl Cvd
|
|
.Op Ar file
|
|
.Nm
|
|
.Cm decompress
|
|
.Op Fl v
|
|
.Op Ar object Ns Sy \&, Ns Ar offset Ns Op Sy \&, Ns Ar type Ns ...
|
|
.Nm
|
|
.Cm redup
|
|
.Op Fl v
|
|
.Ar file
|
|
.Nm
|
|
.Cm token
|
|
.Ar resume_token
|
|
.
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Sy zstream
|
|
utility manipulates ZFS send streams output by the
|
|
.Sy zfs send
|
|
command.
|
|
.Bl -tag -width ""
|
|
.It Xo
|
|
.Nm
|
|
.Cm dump
|
|
.Op Fl Cvd
|
|
.Op Ar file
|
|
.Xc
|
|
Print information about the specified send stream, including headers and
|
|
record counts.
|
|
The send stream may either be in the specified
|
|
.Ar file ,
|
|
or provided on standard input.
|
|
.Bl -tag -width "-D"
|
|
.It Fl C
|
|
Suppress the validation of checksums.
|
|
.It Fl v
|
|
Verbose.
|
|
Print metadata for each record.
|
|
.It Fl d
|
|
Dump data contained in each record.
|
|
Implies verbose.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Nm zstreamdump
|
|
alias is provided for compatibility and is equivalent to running
|
|
.Nm
|
|
.Cm dump .
|
|
.It Xo
|
|
.Nm
|
|
.Cm token
|
|
.Ar resume_token
|
|
.Xc
|
|
Dumps zfs resume token information
|
|
.It Xo
|
|
.Nm
|
|
.Cm decompress
|
|
.Op Fl v
|
|
.Op Ar object Ns Sy \&, Ns Ar offset Ns Op Sy \&, Ns Ar type Ns ...
|
|
.Xc
|
|
Decompress selected records in a ZFS send stream provided on standard input,
|
|
when the compression type recorded in ZFS metadata may be incorrect.
|
|
Specify the object number and byte offset of each record that you wish to
|
|
decompress.
|
|
Optionally specify the compression type.
|
|
Valid compression types include
|
|
.Sy gzip ,
|
|
.Sy lz4 ,
|
|
.Sy lzjb ,
|
|
.Sy zstd ,
|
|
and
|
|
.Sy zle .
|
|
The default is
|
|
.Sy lz4 .
|
|
Every record for that object beginning at that offset will be decompressed, if
|
|
possible.
|
|
It may not be possible, because the record may be corrupted in some but not
|
|
all of the stream's snapshots.
|
|
The repaired stream will be written to standard output.
|
|
.Bl -tag -width "-v"
|
|
.It Fl v
|
|
Verbose.
|
|
Print summary of decompressed records.
|
|
.El
|
|
.It Xo
|
|
.Nm
|
|
.Cm redup
|
|
.Op Fl v
|
|
.Ar file
|
|
.Xc
|
|
Deduplicated send streams can be generated by using the
|
|
.Nm zfs Cm send Fl D
|
|
command.
|
|
The ability to send deduplicated send streams is deprecated.
|
|
In the future, the ability to receive a deduplicated send stream with
|
|
.Nm zfs Cm receive
|
|
will be removed.
|
|
However, deduplicated send streams can still be received by utilizing
|
|
.Nm zstream Cm redup .
|
|
.Pp
|
|
The
|
|
.Nm zstream Cm redup
|
|
command is provided a
|
|
.Ar file
|
|
containing a deduplicated send stream, and outputs an equivalent
|
|
non-deduplicated send stream on standard output.
|
|
Therefore, a deduplicated send stream can be received by running:
|
|
.Dl # Nm zstream Cm redup Pa DEDUP_STREAM_FILE | Nm zfs Cm receive No …
|
|
.Bl -tag -width "-D"
|
|
.It Fl v
|
|
Verbose.
|
|
Print summary of converted records.
|
|
.El
|
|
.El
|
|
.
|
|
.Sh EXAMPLES
|
|
Heal a dataset that was corrupted due to OpenZFS bug #12762.
|
|
First, determine which records are corrupt.
|
|
That cannot be done automatically; it requires information beyond ZFS's
|
|
metadata.
|
|
If object
|
|
.Sy 128
|
|
is corrupted at offset
|
|
.Sy 0
|
|
and is compressed using
|
|
.Sy lz4 ,
|
|
then run this command:
|
|
.Bd -literal
|
|
.No # Nm zfs Ar send Fl c Ar … | Nm zstream decompress Ar 128,0,lz4 | \
|
|
Nm zfs recv Ar …
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr zfs 8 ,
|
|
.Xr zfs-receive 8 ,
|
|
.Xr zfs-send 8 ,
|
|
.Lk https://github.com/openzfs/zfs/issues/12762
|