I changed the reboot cycle from 8:00 & 20:00 to 16:00 HKG time. this means that we will have one less reboot & backup per day. The 2 reboots a day were originally introduced since older versions of the software got into issues after running too long. I now changed the reboot time to the moment when the server is most empty.
So less interruptions and less backup space used. We use the backups so seldom that this will not be an issue. There are also methods to backup maps w/o a reboot, I will look into that just to make sure.