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Read DASD I/O pacing z/OS DFSMSdss Storage Administration SC23-6868-01 |
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You can tune the performance of a system by pacing the DFSMSdss read DASD I/O operations. Pacing reduces the channel utilization and lets other I/O (for example, from the database application) be processed in a more timely fashion. The pacing is done by waiting a specified amount of time before issuing each channel program that reads from DASD. Note: The additional wait time does not apply to error recovery
channel programs or concurrent copy I/O. The System Data Mover dynamically
controls pacing for concurrent copy I/O.
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