Job Management Partner 1/Base User's Guide

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12.2.3 Follow-up tasks when changing the system time

This subsection describes the procedure and precautions for changing the system time while JP1/Base is running.

When you are synchronizing the system clock using a Network Time Protocol (NTP) server or other method in which the system time never becomes a past time, you can do so without stopping JP1/Base. Also, you do not need to follow the procedure below.

Organization of this subsection
(1) Moving the system time backward
(2) Moving the system time forward to correct a slow system time

(1) Moving the system time backward

Avoid changing the system time to a past date or time.

Event searches with a specified arrival time might operate incorrectly if you move the system time backward to correct a fast system time, for example.

If you intentionally moved the system time forward for testing purposes or some other reason, follow the steps below to change the system time back again. If JP1/AJS has already started, refer to the changing procedure in the manuals Job Management Partner 1/Automatic Job Management System 2 Planning and Administration Guide, Job Management Partner 1/Automatic Job Management System 3 System Design (Configuration) Guide, Job Management Partner 1/Automatic Job Management System 3 System Design (Work Tasks) Guide, and Job Management Partner 1/Automatic Job Management System 3 Administration Guide.

To change the system time back again:

  1. Stop JP1/IM - Manager.
  2. Stop JP1/Base.
  3. Stop all services that use the startup control.
  4. Change the system time to the current date and time.
  5. Delete the event database by using the jevdbinit command.
  6. Start JP1/Base.
  7. Restart JP1/IM - Manager.

(2) Moving the system time forward to correct a slow system time

You do not need to stop the JP1/Base service to move the system time forward, but you must stop JP1/AJS if it is active. For details on the procedure, see the manuals Job Management Partner 1/Automatic Job Management System 2 Planning and Administration Guide, Job Management Partner 1/Automatic Job Management System 3 System Design (Configuration) Guide, Job Management Partner 1/Automatic Job Management System 3 System Design (Work Tasks) Guide, and Job Management Partner 1/Automatic Job Management System 3 Administration Guide.

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