Backups are configured via puppet on every server. Backups are ran nightly and pushed to Hosts/alder which deals with filing and retiring old backups. The latest backup for a given server can always be in /srv/backups/staging/<fqdn.shop.lan>. Older backups are in /srv/backups/hosts/<date>/<fqdn.shop.lan>. The backup server takes a snapshot of the staging folders nightly.
To configure backups use the puppet backup module.
10.04 servers are backing up to beech instead of alder. The backups are in /media/backup-archive instead of /srv/backups. The 10.04 servers are being migrated (slowly) to 12.04.