We are creating a three node "active/active/active"-node three-instance cluster with SQL 2008 R2 (not cutting edge, but that is what the application supports) and think it should be able to maintain quorum with two physical nodes down. What is the best way to configure this?
My manager has been pushing for a witness server that acts like an additional quorum vote on top of a node and disk majority. That gives us a vote per node, a vote for the quorum disk, but is it possible to setup a witness server that receives a vote?
I thought a witness was for mirroring, which we have no plans to implement on this cluster. I have been told that adding a fourth node is not a possbility, even if it is only a passive node.