Compaq Galaxy Software Architecture on OpenVMS Alpha

The Compaq Galaxy Software Architecture enables the logical partitioning of AlphaServer systems, allowing multiple independent instances of the OpenVMS Alpha operating system to run cooperatively on a single computer. This architecture provides flexibility for managing unpredictable or growing workloads by dynamically reassigning physical resources like CPUs, memory, and I/O to individual instances. Key features include support for various shared-nothing, shared-partial, and shared-everything computing models, high-performance inter-instance communication via shared memory, and the Galaxy Configuration Utility for system management. The document outlines hardware and software requirements, specific configuration rules for supported AlphaServer models (such as GS series and ES40/4100), and licensing information for OpenVMS Galaxy.