In a large server farm environment, server-to-server communication is crucial. In stand-alone server environments, this is done with a physical network, real cabling, routers, and associated hardware. Acquisition and operational costs are involved, and as the size of the environment grows, so does its complexity.
A unique communication method available in z/VM involves using the memory bus to implement the communication paths. The memory bus replaces hardware cables, and memory-to-memory transfer replaces hardware adapters.
In this chapter, we explore these questions: