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

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

SYNOPSIS
       btrfs send [-ve] [-p _parent_] [-c _clone-src_] [-f _outfile_] _subvol_
       [_subvol_...]

DESCRIPTION
       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

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

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

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

Btrfs v5.4.1                      01/09/2020                     BTRFS-SEND(8)
NAME | SYNOPSIS | DESCRIPTION | EXIT STATUS | AVAILABILITY | SEE ALSO