Pair+N Topology

The pair+N topology includes a pair of nodes directly connected to shared storage and an additional set of nodes that use the cluster interconnect to access shared storage—they have no direct connection themselves.

The following figure illustrates a pair+N topology where two of the four nodes (Node 3 and Node 4) use the cluster interconnect to access the storage. This configuration can be expanded to include additional nodes that do not have direct access to the shared storage.

Figure 2–4 Pair+N Topology