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13OpenVMS Galaxy Configuration Utility  



The Galaxy Configuration Utility (GCU) is a DECwindows Motif application that allows system managers to configure and manage an OpenVMS Galaxy system from a single workstation window.

Using the GCU, system managers can:



The GCU resides in the SYS$SYSTEM directory along with a small number of files containing configuration information.

The GCU consists of the following files:

File
Description
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 configuration models
SYS$HELP:GALAXY_GUIDE.DECW$BOOK
Online help in Bookreader form



The GCU can be run from any Galaxy instance. If the system does not directly support graphics output, then the DECwindows display can be set to an external workstation 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 contains 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 configuration display. Users do not typically alter the ruleset file unless they are well versed in its structure or are directed to do so by an HP 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 a non-Galaxy platform. 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 console environment variables.

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.

skip links to sections within this chapter.
GCU Tour
Managing an OpenVMS Galaxy with the GCU
Galaxy Configuration Models
Using the GCU Charts
Viewing Component Parameters
Executing Component Commands
Customizing GCU Menus
Monitoring an OpenVMS Galaxy with HP Availability Manager
Running the CPU Load Balancer Program
Creating an Instance
Dissolving an Instance
Shutdown and Reboot Cycles
Online Versus Offline Models
GCU System Messages
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