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Table of Contents
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Description
The "CHARON Guest Utilities for OpenVMS" (CHARONCP) package contains several utilities for managing virtual tapes, changing the emulator speed and creating useful definitions for that operations.
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In case of OpenVMS upgrade, CHARONCP will have to be re-installed.
Installation
Specify this image in the CHARON configuration file, boot from the system disk and mount the disk with the following OpenVMS command:
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Select all the components included to the package:
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Proceed with installation using all the default options.
Once the installation is completed, add the following line to the "SYS$STARTUP:SYSTARTUP_VMS.COM" ("SYS$STARTUP:SYSTARTUP_V5.COM" for VMS 5.5) file for the package to be loaded automatically at system startup::
$ @SYS$STARTUP:CHARONCP_STARTUP |
After that the package will be loaded automatically on startup.
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Performance optimization
CHARON takes 100% of host CPU even in case of idle state of guest OpenVMS operating system. To get rid of such resources consumption there is a specific option provided by CHARON Guest Utilities - "idle" mode.
$ CHARONCP SET IDLE /ENABLE | Loads the OpenVMS idle loop detection software. This allows CHARON to detect when the emulated CPU(s) are idle and use the host power saving instructions to reduce power usage. |
$ CHARONCP SET IDLE /DISABLE | Unloads the OpenVMS idle loop detection software. |
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Adjusting emulator's speed
CHARON speed can be adjusted using these commands:
$ CHARONCP SET SPEED /UP=<number of steps> | Increase the emulator speed by the specified number of steps. |
$ CHARONCP SET SPEED /DOWN=<number of steps> | Decrease the emulator speed by the specified number of steps. |
$ CHARONCP SET SPEED /RESET | Remove all speed stepping restraints. |
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Emulator's shutdown control
It is possible to schedule CHARON to shutdown directly from OpenVMS:
$ CHARONCP SET SHUTDOWN /IN=<seconds, 60 is default> | The number of seconds before the CHARON emulator is to shut down. The value can be between 0 and 65535 (approx. 18 hours). |
$ CHARONCP SET SHUTDOWN /RESET | Clear a scheduled shutdown. |
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Virtual tapes management
Specify mapping to tape container in the following way in the CHARON configuration file:
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Example:
set PKA container[600] = ".vtape" removable[600] = true |
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Once it is done using the following commands it is possible to manage virtual tapes attached to CHARON:
| Create the specified host-file (if it does not already exist) and attach it to the specified virtual tape device. Example:
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$ CHARONCP SET MAGTAPE <device> /UNLOAD | Detach any file currently attached to te specified virtual tape device. Example:
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Possible errors:
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Defining keys
It is possible to define certain keys on the terminal keyboard for fast access to the CHARONCP functionalilty while you are in CHARONCP:
| Defines an equivalence string and a set of attributes with a key on the terminal keyboard. You can have a set of keys defined automatically for use with the CHARONCP utility by placing DEFINE/KEY commands in the file SYS$LOGIN:CHARONCP_KEYDEFS.INI Example:
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$ CHARONCPCHARONCP> SHOW KEY <key-name> | Displays key definitions created with the DEFINE/KEY command. Refer to the DCL help entry for SHOW KEY for further information. Example:
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For more information refer to the OpenVMS DCL Dictionary (DEFINE/KEY section).
Displaying version
$ CHARONCP SHOW VERSION | Displays the CHARONCP package version number and architecture. This can be useful for customers reporting issues with the CHARONCP software. Example:
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