[Borgbackup] Separating repos

[Antoine Beaupré]

On 2019-02-04 15:29:36, Ed Blackman wrote:
> I have a set of systems backing up to a single repository on an internal 
> borg server.  Initially all the archives came from the same system, and 
> there was a good chance that as files moved around in that system that 
> they'd be backed up in one set of archives, then show up in another.  So 
> I used a single repository to maximize deduplication.
>
> Over time, I've separated the functions of that single system into 
> multiple systems, and also improved procedures so that a given file 
> should show up in at most one type of archive.  But since they're going 
> into a shared repo, the backups have to spend time syncing the cache.
>
> I'd like to separate retain the archives but separate them into 
> different repos, but it doesn't look like borg has a native way to copy 
> archives from one repo to another.
>
> Is the only way to do it to make a copy of the repo directory outside of 
> borg, and then selectively remove archives from one copy or the other?  
> Would the repos shrink automatically as the archives are removed, such 
> that they would approximately sum to the original repo size, less some 
> for chunks that are now duplicated in two repos?

I don't know, but what I do know is how *not* to do this:

https://github.com/borgbackup/borg/issues/4272

A.

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