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Control‑D "wakes up" every few seconds and checks what it has to do. This interval is set through a Control‑D installation parameter and can be changed by the system administrator. In addition, the interval can be altered by the following operator command:
F CONTROLD,INTERVAL=nn |
where nn represents the interval in seconds.
The interval should be modified by automatic commands invoked by the Control‑O or Control‑M monitor (if present) according to set conditions and time ranges, and not manually by the operator. For sites that do not use the Control‑M Production Control System, the commands can be issued through the JES Automatic Commands facility.
At most sites, the interval should be longer during the day (when fewer batch production jobs are executing) and shorter during the night.
When the modification is received by Control‑D, the following message is displayed on the operator console from which the modify command was issued:
CTD123I Control‑D INTERVAL IS SET TO nn SECONDS |
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