BORG-RECREATE(1) borg backup tool BORG-RECREATE(1) NAME borg-recreate - Re-create archives SYNOPSIS borg [common options] recreate [options] [REPOSITORY_OR_ARCHIVE] [PATH...] DESCRIPTION Recreate the contents of existing archives. recreate is a potentially dangerous function and might lead to data loss (if used wrongly). BE VERY CAREFUL! Important: Repository disk space is not freed until you run borg com- pact. --exclude, --exclude-from, --exclude-if-present, --keep-exclude-tags and PATH have the exact same semantics as in "borg create", but they only check for files in the archives and not in the local file system. If PATHs are specified, the resulting archives will only contain files from these PATHs. Note that all paths in an archive are relative, therefore absolute pat- terns/paths will not match (--exclude, --exclude-from, PATHs). --recompress allows one to change the compression of existing data in archives. Due to how Borg stores compressed size information this might display incorrect information for archives that were not recre- ated 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. 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 inter- preted. See list_item_flags in borg create for details. The archive being recreated is only removed after the operation com- pletes. The archive that is built during the operation exists at the same time at "<ARCHIVE>.recreate". The new archive will have a differ- ent archive ID. With --target the original archive is not replaced, instead a new ar- chive is created. When rechunking (or recompressing), space usage can be substantial - expect at least the entire deduplicated size of the archives using the previous chunker (or compression) params. If you recently ran borg check --repair and it had to fix lost chunks with all-zero replacement chunks, please first run another backup for the same data and re-run borg check --repair afterwards to heal any ar- chives that had lost chunks which are still generated from the input data. Important: running borg recreate to re-chunk will remove the chunks_healthy metadata of all items with replacement chunks, so heal- ing will not be possible any more after re-chunking (it is also un- likely it would ever work: due to the change of chunking parameters, the missing chunk likely will never be seen again even if you still have the data that produced it). OPTIONS See borg-common(1) for common options of Borg commands. arguments REPOSITORY_OR_ARCHIVE repository or archive to recreate PATH paths to recreate; patterns are supported options --list output verbose list of items (files, dirs, ...) --filter STATUSCHARS only display items with the given status characters (listed in borg create --help) -n, --dry-run do not change anything -s, --stats print statistics at end Exclusion options -e PATTERN, --exclude PATTERN exclude paths matching PATTERN --exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line --pattern PATTERN include/exclude paths matching PATTERN --patterns-from PATTERNFILE read include/exclude patterns from PATTERNFILE, one per line --exclude-caches exclude directories that contain a CACHEDIR.TAG file (- http://www.bford.info/cachedir/spec.html) --exclude-if-present NAME exclude directories that are tagged by containing a filesystem object with the given NAME --keep-exclude-tags if tag objects are specified with --exclude-if-present, don't omit the tag objects themselves from the backup archive Archive options --target TARGET create a new archive with the name ARCHIVE, do not replace ex- isting archive (only applies for a single archive) -c SECONDS, --checkpoint-interval SECONDS write checkpoint every SECONDS seconds (Default: 1800) --comment COMMENT add a comment text to the archive --timestamp TIMESTAMP manually specify the archive creation date/time (UTC, yyyy-mm-ddThh:mm:ss format). alternatively, give a reference file/directory. -C COMPRESSION, --compression COMPRESSION select compression algorithm, see the output of the "borg help compression" command for details. --recompress MODE recompress data chunks according to MODE and --compression. Pos- sible modes are if-different: recompress if current compression is with a different compression algorithm (the level is not con- sidered); always: recompress even if current compression is with the same compression algorithm (use this to change the compres- sion level); and never: do not recompress (use this option to explicitly prevent recompression). If no MODE is given, if-dif- ferent will be used. Not passing --recompress is equivalent to "--recompress never". --chunker-params PARAMS rechunk using given chunker parameters (ALGO, CHUNK_MIN_EXP, CHUNK_MAX_EXP, HASH_MASK_BITS, HASH_WINDOW_SIZE) or default to use the chunker defaults. default: do not rechunk EXAMPLES # Make old (Attic / Borg 0.xx) archives deduplicate with Borg 1.x archives. # Archives created with Borg 1.1+ and the default chunker params are skipped # (archive ID stays the same). $ borg recreate /mnt/backup --chunker-params default --progress # Create a backup with little but fast compression $ borg create /mnt/backup::archive /some/files --compression lz4 # Then compress it - this might take longer, but the backup has already completed, # so no inconsistencies from a long-running backup job. $ borg recreate /mnt/backup::archive --recompress --compression zlib,9 # Remove unwanted files from all archives in a repository. # Note the relative path for the --exclude option - archives only contain relative paths. $ borg recreate /mnt/backup --exclude home/icke/Pictures/drunk_photos # Change archive comment $ borg create --comment "This is a comment" /mnt/backup::archivename ~ $ borg info /mnt/backup::archivename Name: archivename Fingerprint: ... Comment: This is a comment ... $ borg recreate --comment "This is a better comment" /mnt/backup::archivename $ borg info /mnt/backup::archivename Name: archivename Fingerprint: ... Comment: This is a better comment ... SEE ALSO borg-common(1), borg-patterns(1), borg-placeholders(1), borg-compres- sion(1) AUTHOR The Borg Collective 2023-03-22 BORG-RECREATE(1)
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