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. -q|--quiet:::: (deprecated) alias for global -q option -v|--verbose:: (deprecated) alias for global -v option Global options -q|--quiet suppress all messages except errors -v|--verbose increase output verbosity, print generated commands in a readable form
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.
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 2020-12-18. (At that time, the date of the most recent commit that was found in the repository was 2020-10-23.) 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 email@example.com Btrfs v4.6.1 07/14/2020 BTRFS-SEND(8)
Pages that refer to this page: btrfs(8), btrfs-receive(8)