We have a 2 node STD sql 2008 sql failover cluster running A/P mode
We want to upgrade the sql lic from STD to ENT but do not want any downtime.
Ie. Rolling Upgrade..
Is this straight froward of upgrading the passive node, testing access to dbases (incl system dbases) via passive, then failover active to passive, and upgrade the new passive..
What about rollback.. if the first stage upgrade of the passive works, but we get dbase errors. can we rollback the upgrade on the passive, does it cause any issues with the master dbase etc..