We need to upgrade our cucm but are looking at 7-8 servers so if we do it in series 14-16 hrs. We can cut this down by doing parallel upload from different sftp but still a while. Our change control window on any given day is short
Question
Do we need to stop any MAC being done on the system if we start the upload early in the week say Wednesday evening so by Friday evening, the new sw is now on the inactive partition ready for the reboot.
What would happen if users or service desk were doing changes while we uploaded the new SW on the inactive partition, would these changes be on the new version when we switch sides?
Thanks