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Workload Description

PACE is a synthetic VSE batch workload consisting of 7 unique jobs representing the commercial environment. This set of jobs is replicated 16 times, producing the DYNAPACE workload. The first 8 copies run in 8 static partitions and another 8 copies run in 4 dynamic classes, each configured with a maximum of 2 partitions. The 7 jobs are:

  • YnDL/1
  • YnSORT
  • YnBILL
  • YnPAY
  • YnFORT

The programs, data, and work space for the jobs are all maintained by VSAM on separate volumes. DYNAPACE has about a 2:1 read/write ratio.

Measurement Methodology

The VSE system is configured with the full complement of 12 static partitions (BG, and F1 through FB). F4 through FB are the partitions used to run 8 copies of PACE. Four dynamic classes, each with 2 partition assignments, run another 8 copies of PACE.

The partitions are configured identically except for the job classes. The jobs and the partition job classes are configured so that the jobs are equally distributed over the partitions and so that, at any one time, the jobs currently running are a mixed representation of the 7 jobs.

When the workload is ready to run, the following preparatory steps are taken:

  • CICS/ICCF is active but idle

  • VTAM is active but idle

  • The LST queue is emptied (PDELETE LST,ALL)

  • The accounting file is deleted (J DEL)

Once performance data gathering is initiated for the system (hardware instrumentation and CP Monitor), the workload is started by releasing all of the batch jobs into the partitions simultaneously using the POWER command, PRELEASE RDR,*Y.

As the workload nears completion, various partitions will finish the work allotted to them. The finish time for both the first and last partitions is noted. Elapsed time is calculated as the total elapsed time from the moment the jobs are released until the last partition is waiting for work.

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