I am fairly new to the failover clustering of servers and have somewhat been thrown in the mix. What I do know, we have a cluster consisting of two MS Windows Server 2008 R2 Enterprise (x64) physical servers running SQL Server 2008 SP1. We have, on each box, 3 different SQL instances running with a total of 50 databases that have been created. Not to get into to many details, I have a backup created from a SQL Server 2008 R2 SP1 that i cannot restore because the difference in versions which has led me to have to upgrade my version of SQL to match that of the backup.
What is my best course of action to upgrade this clustered environment with minimal faults?
Any and all help is appreciated and if I have left out anything pertinent please let me know. Thank you in advance for any advice. I do not wish to attempt to rush this process however management is always in a hurry.