We are looking at upgrading our environment to add in HA paris for every poller and AWS system.
It became obvious to me that we don't actually know how a update activity with HA would work, or what it would look like.
I get how the HA functions with unplanned service outages, but here is what i'm confused on:
- Are we able to update the offline B set, then switch to the A set and preform the upgrade there?
- How would that work with a Database? Wouldn't there be a period of mismatch between the DB and the Pollers?