Copying snapshots between repositories

In case you want to transfer snapshots between two repositories, for example from a local to a remote repository, you can use the copy command:

$ rustic copy --target target-profile
repository d6504c63 opened successfully, password is correct
repository 3dd0878c opened successfully, password is correct

snapshot 410b18a2 of [/home/user/work] at 2020-06-09 23:15:57.305305 +0200 CEST)
    copy started, this may take a while...
snapshot 7a746a07 saved

snapshot 4e5d5487 of [/home/user/work] at 2020-05-01 22:44:07.012113 +0200 CEST)
skipping snapshot 4e5d5487, was already copied to snapshot 50eb62b7

The example command copies all snapshots from the source repository /srv/rustic-repo to the destination repository /srv/rustic-repo-copy. Snapshots which have previously been copied between repositories will be skipped by later copy runs.

Important: This process will have to both download (read) and upload (write) the entire snapshot(s) due to the different encryption keys used in the source and destination repository. This may incur higher bandwidth usage and costs than expected during normal backup runs.

Copying to a repository with different chunker parameters

Instead of pre-initializing the repos you want to copy snapshots into, just use rustic copy --init for the first run - this will set the correct chunker parameters.

Note: rustic currently refuses to copy to a repository with different chunker parameters. If you want to copy to a repository with different chunker parameters, you have to set the chunker parameters of the target repository to the same values as the source repository.