Control Object Types (SAP Library - Background Processing)

Control Object Types

Definition

You can test and analyze the following objects:

Job starter	The part of the background processing system that starts a job and executes the various job steps.
Time-driven scheduler	The part of the background processing system that prepares jobs for background processing according to their scheduled start times. It runs at regular intervals and determines whether the scheduled start times of released jobs have been reached. Any such jobs found are started by the job starter in the local application server as soon as background work processes become available. The time interval at which the scheduler is started is laid down in parameter rdisp/btctime .
Event-driven scheduler	The part of the background processing system that prepares jobs for background processing dependent on defined events. It is triggered each time an event occurs and checks whether any released jobs are linked to this event. Affected jobs are started in the local application server by the job starter as soon as background work processes become available.
External program	The SAP part of the control program that starts an external program from within the background processing system If required, the external program can store the standard output or standard error output of the external program and can receive the return code from the program, which also goes to the job log.
Zombie clean-up	Removes jobs interrupted by a system crash. Although they have been abnormally terminated, these jobs would have status active because normal processing of the termination could not take place. When the zombie clean-up is triggered, it determines which jobs have status active but are not currently being processed and then changes the status of these jobs to terminated, allowing you to remove or reschedule the jobs. In a multi-server environment, another server handles the clean-up for the crashed server. On the other hand, in a single server environment, the zombie clean-up is done when the crashed system is restarted.