1.$ SET SERVER REGISTRY_SERVER/RESTART/MASTER
      This command restarts the detached Registry server on the
      master server.
    2.$ SET SERVER REGISTRY_SERVER/LOG/CLUSTER
      This command closes the current log files and opens new files
      on all systems across the cluster.
    3.$ SET SERVER REGISTRY_SERVER/EXIT/NODE=(KAKADU,CAIRNS)
      This command stops the detached Registry server process on
      nodes KAKADU and CAIRNS.