[Borgbackup] Disaster Recovery or backup of backup

[Oliver Hoffmann]

Hi Marian,


I considered that. Well, theoretically.

I'll just try out different things once the HW arrived and let you know
how well it works.


Thanks all!

> Hello Oliver,
> 
> have you considered a two-tier approach, using Borg to collect backups
> from your clients and then protecting those backups using
> filesystem-level snapshots (both btrfs and ZFS can send/receive
> snapshots from other hosts). That would allow you to work around the
> lack of replication facilities in Borg itself.
> 
> Cheers, Marian
> 
> Am Fr., 7. Mai 2021 um 16:18 Uhr schrieb Oliver Hoffmann <oh at dom.de
> <mailto:oh at dom.de>>:
> 
>     Hi all,
> 
> 
>     I use borg for quite a while now and it works just fine.
> 
>     Now that I'm going to set up two Backup servers with approximately 20 TB
>     of backup data and roughly 40 clients each I wonder how to prevent data
>     loss. In other words how do I prepare for a disaster? Meaning system and
>     data gone.
> 
>     Simply rsyncing all folders to a nas or something and setting up a new
>     borg server won't work and two independent backups as suggested means to
>     much traffic for the network as well as for some clients. There is
>     simply not enough time for a double backup.
> 
>     So, here comes my approach. I intend to use xen or better xcp-ng and on
>     top the actual borg server as a VM. Snapshots/exports will be made every
>     night and kept somewhere else. The data will be rsynced off the server
>     too. In case of a disaster I just need a similar or identical HW, set up
>     xen, import the saved VM and copy all the borg folders with the repos
>     back. That way I'd have data and corresponding borg server put together
>     again. Or I resurrect the server on some other xen host and access the
>     data via nfs which would be quicker in case of an urgent restore.
> 
>     Do I miss something or does that sound feasible?
> 
>     Thank for your thoughts,
> 
>     Oliver
> 
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