JBoss EAP Cluster prioritization?

Hi.

I have two two-node JBoss EAP clusters, one cluster is the cluster for production(load balanced), and another two-node cluster(which is also configured as load balanced to take the role of primary when the prod cluster goes down). They are both configured to use IIS as the web frontend.

My questions are:

1.) Is there a way to somehow just merge those two clusters, but only the nodes for prod is active while the other two nodes for DR remains inactive until something bad happens to prod, something like a prioritization mechanism that will just activate the DR nodes once all the prod nodes are down?

2.) And if the transactions are already being processed using the DR cluster, once the PROD cluster is restored in their healthy condition, what would be the best approach? To automatically have the transactions be transferred to the PROD nodes at once, or to just use the DR cluster until there is time to switch over to PROD? How can that be done?

Thanks in advance!

Regards,
Lem