btrfs-send(8) - phpMan

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



NAME
       btrfs-send - generate a stream of changes between two subvolumes

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
       subvolumes. The stream can be consumed by the btrfs receive command to replicate the sent
       subvolume on a different filesystem. The command operates in two modes: full and
       incremental.

       All subvolumes involved in one send command must be read-only (ie. the read-only snapshots
       and this status cannot be changed if there's a running send operation that uses the
       subvolume).

       In the full mode, the entire subvolume data and metadata will end up in the stream.

       In the incremental mode (options -p and -c), there can be one or more parent subvolumes
       that will establish the base for determining the changes. The final stream will be smaller
       compared to the full mode.

       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 outout so it can be eg. piped to receive, use
           this option to write it to a file

       --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 messagese 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 v4.9.1                                08/06/2017                              BTRFS-SEND(8)

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