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The Printers Control monitor is active as an independent started task. It is initiated, controlled and terminated by the Control-D monitor. Its purpose is to actually perform the printing process.
The Printers Control monitor receives from the Control-D monitor a printing plan and the name of the printer assigned to the printing mission (printing mission = a bundle). The Printers Control monitor writes the bundled reports to spool in controlled "chunks" (the size of which is specified in the printing mission or in the Printer Definition in member CTDPARM). It tracks printing speed and makes sure the printer always has something to print, but not too much. This prevents overloading the spool with SYSOUTs that cannot be printed until much later.
The Printers Control monitor switches to a new chunk of lines when the printing characteristics in the user bundle change. It is possible to print sysouts with different printing characteristics in the same bundle.
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