11.  Shared  Memory  Cluster  Interconnect
  (SMCI)

  The Shared Memory Cluster Interconnect (SMCI) is an SCS
  port for communications between Galaxy instances.  When
  an OpenVMS instance is booted as both a Galaxy and as an
  OpenVMS Cluster, the Shared Memory Cluster Interconnect
  driver will be loaded.  This SCS port driver will communi-
  cate to other cluster instances in the same Galaxy through
  shared memory.  This capability provides one of the ma-
  jor performance benefits of the OpenVMS Galaxy Software
  Architecture.  The ability to communicate to another clus-
  tered instance through shared memory provides dramatic
  performance benefits over traditional cluster interconnects.