borg transfer

borg [common options] transfer [options]

optional arguments
	-n, --dry-run	do not change repository, just check
	--other-repo SRC_REPOSITORY	transfer archives from the other repository
Common options
Archive filters — Archive filters can be applied to repository targets.
	-P PREFIX, --prefix PREFIX	only consider archive names starting with this prefix.
	-a GLOB, --glob-archives GLOB	only consider archive names matching the glob. sh: rules apply, see “borg help patterns”. --prefix and --glob-archives are mutually exclusive.
	--sort-by KEYS	Comma-separated list of sorting keys; valid keys are: timestamp, name, id; default is: timestamp
	--first N	consider first N archives after other filters were applied
	--last N	consider last N archives after other filters were applied

Description

This command transfers archives from one repository to another repository.

Suggested use:

# initialize DST_REPO reusing key material from SRC_REPO, so that
# chunking and chunk id generation will work in the same way as before.
borg --repo=DST_REPO init --other-repo=SRC_REPO --encryption=DST_ENC

# transfer archives from SRC_REPO to DST_REPO
borg --repo=DST_REPO transfer --other-repo=SRC_REPO --dry-run  # check what it would do
borg --repo=DST_REPO transfer --other-repo=SRC_REPO            # do it!
borg --repo=DST_REPO transfer --other-repo=SRC_REPO --dry-run  # check! anything left?

The default is to transfer all archives, including checkpoint archives.

You could use the misc. archive filter options to limit which archives it will transfer, e.g. using the -a option. This is recommended for big repositories with multiple data sets to keep the runtime per invocation lower.

Examples

::

# 0. Have borg 2.0 installed on client AND server, have a b12 repo copy for testing.

# 1. Create a new “related” repository: # here, the existing borg 1.2 repo used repokey-blake2 (and aes-ctr mode), # thus we use repokey-blake2-aes-ocb for the new borg 2.0 repo. # staying with the same chunk id algorithm (blake2) and with the same # key material (via --other-repo <oldrepo>) will make deduplication work # between old archives (copied with borg transfer) and future ones. # the AEAD cipher does not matter (everything must be re-encrypted and # re-authenticated anyway), you could also choose repokey-blake2-chacha20-poly1305. # in case your old borg repo did not use blake2, just remove the “-blake2”. $ borg --repo ssh://borg2@borgbackup/./tests/b20 rcreate

--other-repo ssh://borg2@borgbackup/./tests/b12 -e repokey-blake2-aes-ocb

# 2. Check what and how much it would transfer: $ borg --repo ssh://borg2@borgbackup/./tests/b20 transfer

--other-repo ssh://borg2@borgbackup/./tests/b12 --dry-run

# 3. Transfer (copy) archives from old repo into new repo (takes time and space!): $ borg --repo ssh://borg2@borgbackup/./tests/b20 transfer

--other-repo ssh://borg2@borgbackup/./tests/b12

# 4. Check if we have everything (same as 2.): $ borg --repo ssh://borg2@borgbackup/./tests/b20 transfer

--other-repo ssh://borg2@borgbackup/./tests/b12 --dry-run