borg/docs/usage/recreate.rst.inc

.. _borg_recreate:

borg recreate
-------------
::

    borg recreate <options> REPOSITORY_OR_ARCHIVE PATH

positional arguments
    REPOSITORY_OR_ARCHIVE
        repository/archive to recreate
    PATH
        paths to recreate; patterns are supported

optional arguments
    ``--list``
        | output verbose list of items (files, dirs, ...)
    ``--filter STATUSCHARS``
        | only display items with the given status characters
    ``-p``, ``--progress``
        | show progress display while recreating archives
    ``-n``, ``--dry-run``
        | do not change anything
    ``-s``, ``--stats``
        | print statistics at end

`Common options`_
    |

Exclusion options
    ``-e PATTERN``, ``--exclude PATTERN``
        | exclude paths matching PATTERN
    ``--exclude-from EXCLUDEFILE``
        | read exclude patterns from EXCLUDEFILE, one per line
    ``--exclude-caches``
        | exclude directories that contain a CACHEDIR.TAG file (http://www.brynosaurus.com/cachedir/spec.html)
    ``--exclude-if-present FILENAME``
        | exclude directories that contain the specified file
    ``--keep-tag-files``
        | keep tag files of excluded caches/directories

Archive options
    ``--comment COMMENT``
        | add a comment text to the archive
    ``--timestamp yyyy-mm-ddThh:mm:ss``
        | manually specify the archive creation date/time (UTC). alternatively, give a reference file/directory.
    ``-C COMPRESSION``, ``--compression COMPRESSION``
        | select compression algorithm (and level):
        | none == no compression (default),
        | lz4 == lz4,
        | zlib == zlib (default level 6),
        | zlib,0 .. zlib,9 == zlib (with level 0..9),
        | lzma == lzma (default level 6),
        | lzma,0 .. lzma,9 == lzma (with level 0..9).
    ``--chunker-params CHUNK_MIN_EXP,CHUNK_MAX_EXP,HASH_MASK_BITS,HASH_WINDOW_SIZE``
        | specify the chunker parameters (or "default").

Description
~~~~~~~~~~~

Recreate the contents of existing archives.

--exclude, --exclude-from and PATH have the exact same semantics
as in "borg create". If PATHs are specified the resulting archive
will only contain files from these PATHs.

--compression: all chunks seen will be stored using the given method.
Due to how Borg stores compressed size information this might display
incorrect information for archives that were not recreated at the same time.
There is no risk of data loss by this.

--chunker-params will re-chunk all files in the archive, this can be
used to have upgraded Borg 0.xx or Attic archives deduplicate with
Borg 1.x archives.

borg recreate is signal safe. Send either SIGINT (Ctrl-C on most terminals) or
SIGTERM to request termination.

Use the *exact same* command line to resume the operation later - changing excludes
or paths will lead to inconsistencies (changed excludes will only apply to newly
processed files/dirs). Changing compression leads to incorrect size information
(which does not cause any data loss, but can be misleading).
Changing chunker params between invocations might lead to data loss.

USE WITH CAUTION.
Depending on the PATHs and patterns given, recreate can be used to permanently
delete files from archives.
When in doubt, use "--dry-run --verbose --list" to see how patterns/PATHS are
interpreted.

The archive being recreated is only removed after the operation completes. The
archive that is built during the operation exists at the same time at
"<ARCHIVE>.recreate". The new archive will have a different archive ID.

When rechunking space usage can be substantial, expect at least the entire
deduplicated size of the archives using the previous chunker params.
When recompressing approximately 1 % of the repository size or 512 MB
(whichever is greater) of additional space is used.