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I/O Priority z/OS MVS Programming: Workload Management Services SC34-2663-00 |
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I/O PrioritySRM defines an I/O priority for each service class period. All address spaces in a service class period have the same I/O priority. Multiple service class periods may have the same I/O priority. I/O priority is used to prioritize requests on IOS’s UCB queues. The I/O priority is recorded in the subtype 2 records. |
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