First off before I get badgered, yes I know it is not called active-active but rather multi-instance clustering :).
We currently have a couple 2008 R2 A-A clusters and we are putting a plan together to upgrade to 2012.
The question I have is can we use A-A FCI with AlwaysOn AG's? What I could find online says you can use FCI with AlwaysOn AG but they specifically talk about A-P FCI. I read this article: http://msdn.microsoft.com/en-us/library/ff929171.aspx and it has a note next to readable secondaries that reads:
"Whereas synchronous secondary replicas in an availability group are always running on their respective SQL Server instances, secondary nodes in an FCI actually have not started their respective SQL Server instances and are therefore not readable. In an FCI, a secondary node starts its SQL Server instance only when the resource group ownership is transferred to it during an FCI failover. However, on the active FCI node, when an FCI-hosted database belongs to an availability group, if the local availability replica is running as a readable secondary replica, the database is readable."
However in the case of an A-A cluster the second node does have their SQL Server instance running.
Here is the ultimate goal we want to accomplish:
Have the A-A Cluster be the primary with two read-only secondaries, one for each node in the cluster. Then have another two secondaries in a different subnet that are getting asynchronous/synchronous updates (DR site). Is this setup possible with the current offering with SQL 2012? We currently have a 3rd party tool to go to the DR site now so if we can't do that piece it is not the end of the world.
My current thought is since we are running A-A clusters we really can't benefit fully from the new AlwaysOn AG's.
Thanks for your help.