9.  OpenVMS Galaxy Configuration  Utility

  The Galaxy Configuration Utility (GCU) is a DECwindows

  Motif application that allows system managers to configure
  and manage their Galaxy systems from a single workstation
  window.

  Using the GCU, system managers can:

  *   Display the active Galaxy configuration.

  *   Reassign resources among Galaxy instances.

  *   View resource-specific characteristics.

  *   Shut down or reboot one or more Galaxy instances.

  *   Invoke additional management tools.

  *   Evaluate run-time performance and resource usage.

  *   Create and engage Galaxy configuration models.

  *   Create a single-instance Galaxy on any Alpha system
      (for software development on non-Galaxy hardware
      platforms).

  *   View the online Galaxy documentation.

  *   Determine hot-swap characteristics of the current hard-
      ware platform.

  The GCU resides in the SYS$SYSTEM[SYSMGR] directory
  along with a small number of files containing configuration
  knowledge.

  The GCU consists of the following files:

  SYS$SYSTEM:GCU.EXE                         GCU executable image
  SYS$MANAGER:GCU.DAT                        Optional DECwindows
                                             resource file
  SYS$MANAGER:GALAXY.GCR                     Galaxy Configuration

                                             Ruleset
  SYS$MANAGER:GCU$ACTIONS.COM       System management
                                             procedures

  SYS$MANAGER:    xxx.GCM                    User-defined configu-
                                             ration models

  SYS$HELP:GALAXY_GUIDE.DECW$BOOK   Online help in
                                             Bookreader form

  The GCU is typically run from the primary Galaxy instance.
  If the system does not directly support graphics output, then
  the DECwindows display can be set to an external worksta-
  tion or suitably configured PC. However, the GCU application
  itself must always run on the Galaxy system.

  When the GCU is started, it loads any customizations found
  in its resource file (GCU.DAT); then it loads the Galaxy

  Configuration Ruleset (GALAXY.GCR). The ruleset file con-
  tains statements that determine the way the GCU displays
  the various system components, and includes rules that
  govern the ways in which users can interact with the con-
  figuration display.  Users do not typically alter the ruleset
  file unless they are well versed in its structure or are di-
  rected to do so by a Compaq Services Engineer.  After the
  GCU display becomes visible, the GCU determines whether
  the system is currently configured as an OpenVMS Galaxy
  or as a single-instance Galaxy on any Alpha system.  If the
  system is configured as a Galaxy, the GCU displays the active
  Galaxy configuration model.  The main observation window
  displays a hierarchical view of the Galaxy.  If the system
  has not yet been configured as a Galaxy, the GCU prompts
  you as to whether or not to create a single-instance Galaxy.
  Note that the GCU can create a single-instance Galaxy on
  any Alpha system, but multiple-instance OpenVMS Galaxy
  environments are created by using console commands and
  firmware functions as described elsewhere in this document.

  Once the Galaxy configuration model is displayed, users can
  either interact with the active model or take the model off
  line and define specific configurations for later use.  The
  following sections discuss these functions in greater detail.