Is it possible to merge two borg repositories?

Question

I use borg as a backup solution for my Linux machine.

I have two distinct borg repositories, let's call them

/path/to/borg/repository/first/

and

/path/to/borg/repository/second/

I need to merge these two repositories into a single one.

Is it possible to do so, and how?

Answer 1

I cannot find any officially endorsed method, but a possible approach could be to identify all the archives missing from one of the repositories and transfer them from the other using a combination of borg fuse and create.