[tech] Cron <backups at mollitz> /backups/bin/rdiff-manager/rdiff-manager.py (fwd)

[David Adam]

On Wed, 9 Aug 2017, David Adam wrote:
> Backups for molmol have been failing for the last month or so as the
> backup server (Mollitz) does not have enough space.
> 
> I am planning to drop the backups of /away in order to maintain the
> backups of things that actually matter, like /services.
> 
> Mollitz has four 2 TB drives in it. Three of them are RAID-5ed to make a
> 4 TB array using the hardware RAID and an ext4 filesystem, and the
> fourth is a single RAID-0 which has a ZFS pool on it. (The ZFS pool uses 
> compression, which means it can store a bit more data.)
> 
> At some stage, we could delete the array and redo it so that it has a 
> RAID-5 using all four drives, but that involves losing all the data on the 
> array so I have been avoiding it.

I don't know why it didn't occur to me before, but I've split the backups 
instead - /away is now backed up to /backups/away using "away.ucc..." as 
the hostname, while everything else on molmol remains on /backups/molmol.

/backups/molmol is still a single-drive ZFS pool.

I've upgraded mollitz to Debian 9 (stretch), mainly because I needed to 
reboot anyway.

[DAA]