So...I was confusing in my title. That's what happens when you are in a hurry...
What I meant was..the Secondary MDS server in the High Availability configuration. Here it is slightly less confusing:
We are going to upgrade to 80.10 in the coming days, but I have seen conflicting information on what to do with the SECONDARY MDS server. At CPX, someone said that we should just remove all existence of it from our database before the upgrade, and then make a new one after the primary is upgraded, syncing everything up then. Then I read something on here that we should do an export/import on the SECONDARY as well. Which one works better?
Same with MLM servers. We have 6 servers..what is the recommended path to upgrade those to 80.10?