|
NAME | SYNOPSIS | DESCRIPTION | EXIT STATUS | AVAILABILITY | SEE ALSO | COLOPHON |
|
BTRFS-SEND(8) Btrfs Manual BTRFS-SEND(8)
btrfs-send - generate a stream of changes between two subvolume
snapshots
btrfs send [-ve] [-p <parent>] [-c <clone-src>] [-f <outfile>]
<subvol> [<subvol>...]
This command will generate a stream of instructions that describe
changes between two subvolume snapshots. The stream can be consumed
by the btrfs receive command to replicate the sent snapshot on a
different filesystem. The command operates in two modes: full and
incremental.
All snapshots involved in one send command must be read-only, and
this status cannot be changed as long as there’s a running send
operation that uses the snapshot.
In the full mode, the entire snapshot data and metadata will end up
in the stream.
In the incremental mode (options -p and -c), previously sent
snapshots that are available on both the sending and receiving side
can be used to reduce the amount of information that has to be sent
to reconstruct the sent snapshot on a different filesystem.
The -p <parent> option can be omitted when -c <clone-src> options are
given, in which case btrfs send will determine a suitable parent from
among the clone sources.
You must not specify clone sources unless you guarantee that these
snapshots are exactly in the same state on both sides—both for the
sender and the receiver.
Options
-e
if sending multiple subvolumes at once, use the new format and
omit the end cmd marker in the stream separating the subvolumes
-p <parent>
send an incremental stream from parent to subvol
-c <clone-src>
use this snapshot as a clone source for an incremental send
(multiple allowed)
-f <outfile>
output is normally written to standard output so it can be, for
example, piped to btrfs receive. Use this option to write it to a
file instead.
--no-data
send in NO_FILE_DATA mode
The output stream does not contain any file data and thus cannot
be used to transfer changes. This mode is faster and is useful to
show the differences in metadata.
-v|--verbose
enable verbose output, print generated commands in a readable
form, (each occurrence of this option increases the verbosity
level)
-q|--quiet
suppress all messages except errors
btrfs send returns a zero exit status if it succeeds. Non zero is
returned in case of failure.
btrfs is part of btrfs-progs. Please refer to the btrfs wiki
http://btrfs.wiki.kernel.org for further details.
mkfs.btrfs(8), btrfs-receive(8)
This page is part of the btrfs-progs (btrfs filesystem tools)
project. Information about the project can be found at
⟨https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories⟩.
If you have a bug report for this manual page, see
⟨https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#How_do_I_report_bugs_and_issues.3F⟩.
This page was obtained from the project's upstream Git repository
⟨git://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git⟩
on 2018-02-02. (At that time, the date of the most recent commit
that was found in the repository was 2018-01-05.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Btrfs v4.6.1 01/23/2018 BTRFS-SEND(8)
Pages that refer to this page: btrfs(8), btrfs-receive(8)
|
HTML rendering created 2018-02-02 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.
|
|