Galaxy Systems

The Galaxy software architecture allows multiple instances of OpenVMS to run simultaneously on a single computer. CPUs, blocks of physical memory, and I/O ports can be assigned to different instances of OpenVMS, and these resources can be reassigned from one instance to another.

For example, if a given computer has 6 CPUs and 6GB of physical memory, a system manager may decide to allocate 2 CPUs and 2GB of physical memory to each of three instances of OpenVMS running concurrently. He may further decide to form a VMScluster comprised of the three instances.

A given CPU may be reassigned to another instance while the Galaxy system is running without interrupting any applications running on any instance.

These features offer several benefits. For example, different versions of OpenVMS may run on the same computer at the same time. Thus, entire systems can undergo operating system upgrades without shutting down more than one instance at a time, minimizing application interruptions. The ability to reassign hardware resources enables the system manager to respond to changes in workloads among instances; a CPU can be reassigned from a nearly idle instance to one temporarily requiring more CPU power.



Getting Started with OpenVMS(c) A Guide for New Users
Getting Started with OpenVMS: A Guide for New Users (HP Technologies)
ISBN: 1555582796
EAN: 2147483647
Year: 2005
Pages: 215

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