NAME | SYNOPSIS | DESCRIPTION | EXIT STATUS | AVAILABILITY | SEE ALSO | COLOPHON

BTRFS-SEND(8)                   Btrfs Manual                   BTRFS-SEND(8)

NAME         top

       btrfs-send - generate a stream of changes between two subvolume
       snapshots

SYNOPSIS         top

       btrfs send [-ve] [-p <parent>] [-c <clone-src>] [-f <outfile>]
       <subvol> [<subvol>...]

DESCRIPTION         top

       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.

       It is allowed to omit the -p <parent> option when -c <clone-src>
       options are given, in which case btrfs send will determine a suitable
       parent among the clone sources itself.

       You must not specify clone sources unless you guarantee that these
       snapshots are exactly in the same state on both sides, 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 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

EXIT STATUS         top

       btrfs send returns a zero exit status if it succeeds. Non zero is
       returned in case of failure.

AVAILABILITY         top

       btrfs is part of btrfs-progs. Please refer to the btrfs wiki
       http://btrfs.wiki.kernel.org for further details.

SEE ALSO         top

       mkfs.btrfs(8), btrfs-receive(8)

COLOPHON         top

       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 2017-09-15.  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                     07/05/2017                    BTRFS-SEND(8)

Pages that refer to this page: btrfs(8)btrfs-receive(8)