I'm testing SQL clustering for some devs and we currently have a active-passive sql 2019 failover cluster with SAN rdm's fro storage which works pretty well.
We want to test adding an additional node so that it becomes an active-active-passive to spread the load a bit but from what I can tell adding a node to the current cluster would only create an active-passive-passive cluster.
Is it even possible to have an active-active-passive cluster or should we be looking at HA groups/Always on?
Any advise would be much appreciated. Thanks