1. Run upgrade on each server?
Prior to the upgrade (weeks ago) I had pointed my hosts file to a single server, not the LB. So when I ran the upgrade it apparently only ran on that 1 server. So I had to then point my hosts file to the 2nd server and re-run the upgrade. Once I did that everything was good.
Should this be the normal upgrade process for load balanced servers, to run the upgrades on each server?
A general question about notices - we put a notice up prior to the upgrade to notify users, when we took the notice down it took about 1/2 hour or so before it stopped appearing on all pages. Is this just a cache clear issue and should I rebuild certain caches in this case? I did rebuild forum cache but thread cache could take several hours due to site.