4.2  Clustering OpenVMS Galaxy Instances

  Instances in an OpenVMS Galaxy computing environment
  can be clustered with other instances in a single system,
  with instances in other Galaxy systems, or with non-Galaxy
  systems.  Each type of clustering has different licensing
  requirements, as described in the following sections.

  4.2.1  Clustering in a Galaxy System

  In an OpenVMS Galaxy computing environment, instances
  can be clustered with other instances within a Galaxy sys-
  tem.  Clustered instances use the shared-memory cluster
  interconnect to communicate with each other.

  The licensing and functionality for clustering within a Galaxy
  system is provided under the OpenVMS Galaxy License.

  4.2.2  Clustering Outside a Galaxy System
  Instances in an OpenVMS Galaxy computing environ-
  ment can be clustered with instances in another OpenVMS

  Galaxy system or with cluster nodes in non-Galaxy systems.
  Instances clustered outside of a Galaxy system use traditional
  cluster interconnects.

  Each system that is clustered with another system must be
  licensed for OpenVMS Cluster Software.  Clustering outside
  the OpenVMS Galaxy system is not covered by the OpenVMS
  Galaxy License.