All connections not routed to a logical cluster via an explicit routing rule are routed to the current open logical cluster. When you create a new cluster, the system logical cluster is automatically designated the open logical cluster. You can reset the open attribute for another logical cluster. However, only one open logical cluster can exist per physical cluster.
To specify a new open logical cluster, use sp_cluster logical, "set". For example, to designate “CatchallLC” as the open logical cluster, enter:
sp_cluster logical, "set", CatchallLC, "open"
When you reset the open attribute for a new logical cluster, Adaptive Server automatically turns off the open attribute for the old open logical cluster.
You can use the open property with the down-routing mode to reserve one or more instances for the exclusive use of a specific logical cluster.
