The Question is:
what is a cluster
The Answer is :
The following is paraphrased from the available OpenVMS Cluster
"An OpenVMS Cluster system is a highly integrated organization of
OpenVMS software, Alpha and VAX computers, and storage devices that
operate as a single system. The OpenVMS Cluster acts as a single
virtual system, even though it is made up of many distributed systems.
As members of an OpenVMS Cluster system, Alpha and VAX computers can
share processing resources, data storage and batch and print queues
under a single security and management domain, yet they can boot or
For additional details, please see the OpenVMS Cluster Systems Manual.
This documentation is available via pointers in the OpenVMS FAQ.