Difference between revisions of "JOB CONTROL"
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| − | JOB_CONTROL is the VMS Job controller process. The job controller performs multiple functions for VMS: | + | The JOB_CONTROL process is the VMS Job controller process. |
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| + | Image Location: SYS$COMMON:[SYSEXE]JBC$JOB_CONTROL.EXE | ||
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| + | = Job controller process functional summary = | ||
| + | The job controller performs multiple functions for VMS: | ||
#When a new terminal connection is detected the job controller creates a process attached to the terminal running LOGINOUT.EXE to initiate the login process. | #When a new terminal connection is detected the job controller creates a process attached to the terminal running LOGINOUT.EXE to initiate the login process. | ||
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#Acts as the client communication to all VMS Queue Managers running in a cluster. | #Acts as the client communication to all VMS Queue Managers running in a cluster. | ||
##Creates batch processes and symbiont processes on the local system. | ##Creates batch processes and symbiont processes on the local system. | ||
| − | ##Notifies queue managers of | + | ##Notifies queue managers of the batch job and symbiont processes terminations on the local system. |
##Creates queue manager processes for queue managers that are prioritized to run on the local system. | ##Creates queue manager processes for queue managers that are prioritized to run on the local system. | ||
| − | #Performs Standard Time and Daylight Saving Time clock adjustments. | + | #Performs Standard Time and Daylight Saving Time clock adjustments, when the system parameter AUTO_DLIGHT_SAV is 1. |
| + | #As a known, persistent process JOB_CONTROL is sometimes used by products and OS components as the target to queue ASTs to perform a desired actions. For example, the Availability Manager Product has an option to force crash a system. The Availability Manager RMDRIVER queues an AST to the JOB_CONTROL process to perform the crash. | ||
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| + | = Job controller communication = | ||
| + | The job controller receives messages to perform operations through two methods: | ||
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| + | #Job Control permanent Mailbox MBA1: | ||
| + | #IPC Queue Manangement Association Channel <association name to be supplied> | ||
Latest revision as of 14:00, 2 June 2020
The JOB_CONTROL process is the VMS Job controller process.
Image Location: SYS$COMMON:[SYSEXE]JBC$JOB_CONTROL.EXE
Job controller process functional summary
The job controller performs multiple functions for VMS:
- When a new terminal connection is detected the job controller creates a process attached to the terminal running LOGINOUT.EXE to initiate the login process.
- Processes all VMS requests to write accounting data to the system accounting file.
- Acts as the client communication to all VMS Queue Managers running in a cluster.
- Creates batch processes and symbiont processes on the local system.
- Notifies queue managers of the batch job and symbiont processes terminations on the local system.
- Creates queue manager processes for queue managers that are prioritized to run on the local system.
- Performs Standard Time and Daylight Saving Time clock adjustments, when the system parameter AUTO_DLIGHT_SAV is 1.
- As a known, persistent process JOB_CONTROL is sometimes used by products and OS components as the target to queue ASTs to perform a desired actions. For example, the Availability Manager Product has an option to force crash a system. The Availability Manager RMDRIVER queues an AST to the JOB_CONTROL process to perform the crash.
Job controller communication
The job controller receives messages to perform operations through two methods:
- Job Control permanent Mailbox MBA1:
- IPC Queue Manangement Association Channel <association name to be supplied>
