How is Workload Management done for Generic Resources of multiple CA-TPX images?

Document ID : KB000011531
Last Modified Date : 14/02/2018
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Introduction:

Workload balancing in a CA TPX Generic Resource environment.

Question:

How is Workload Management done for Generic Resources of multiple CA-TPX images?

Environment:
CA TPX 5.4
Answer:

In a Generic Resource environment, a user logging on to CA-TPX is routed into one of the TPX images that build the Generic Resource.

This can be accomplished by any of the three processes detailed below:

  • VTAM session balancing: VTAM will use the terminal session counts provided by VTAM's Coupling Facility to balance the number of active terminal sessions on each Unicenter CA-TPX instance.

  • VTAM calls to the z/OS Workload Manager (WLM): After making the selection based on the session counts, the VTAM network node calls IBM WLM, which can override the instance chosen using VTAM's own logic.

  • VTAM Generic Resource exit: VTAM will call the user-written VTAM generic resource exit (if one exists), which will override the first two choices.

 

Additional Information:

More details can be found in the IBM Redbook 'Parallel Sysplex Configuration', which is downloadable at: www.redbooks.ibm.com/redbooks/pdfs/sg245637.pdf.