Sysplex optimized workload management learning path

This learning path provides an overview of sysplex optimized workload management.

Read through each topic in order, using the navigation at the end of each topic to move to the next topic. Some topics contain links to related information so that you can leave the learning path to find out more about particular aspects of sysplex optimized workload. To go directly to a particular topic in the learning path, use the navigation in the Contents panel.

Subtopics

  1. Introduction to sysplex optimized workload management
    In this learning path, you will learn about optimizing your workloads by implementing a region status server, the benefits you can expect, how to determine your optimization status, storage utilization, impact on the coupling facility, and region status (RS) server tuning parameters.
  2. Sysplex optimized workload routing overview
    In CICS® TS for z/OS®, Version 4.1, workload throughput is improved through a more efficient workload management optimization function. This function is most effective for distributed workloads, for which the routing and target regions are managed by different CMASs. With new CPSM WUI views, you can monitor the distribution of dynamic workloads through your CICSplex.
  3. Optimized dynamic workload routing implementation
    CICSPlex® SM provides dynamic workload management for CICS. CICSPlex SM can augment its workload management decisions using current status information posted directly from CICS by using a region status (RS) server.
  4. Benefits of sysplex optimized workload routing
    A sysplex optimized workload is a workload that is best suited to workloads contained in a single sysplex. For a workload that runs in a CICSplex that spans one sysplex, the benefits of optimized routing are achieved by sharing region status data stored in the z/OS coupling facility across sysplexes.
  5. Setting up and running a region status server
    You can use a CICS region status server to share CICS region status data in a sysplex rapidly to support optimized workload management. A region status server services only region status requests, rather than region status and user application requests.
  6. Optimization status of the workload
    You can use the Active workloads list view in the CICSPlex SM Web User Interface (WUI) to view the status of each workload active in the CICSplex.
  7. Optimization status for a CICS region
    You can use the Routing regions or Target regions views located in the Active workloads list view in the CICSPlex SM Web User Interface (WUI) to view the optimization status of CICS regions participating in workloads.
  8. Storage space required in the coupling facility for WLM
    You must allocate storage in the coupling facility to store CICS status. Your sysplex workloads are optimized when your region status (RS) server starts.
  9. Impact of sysplex optimized workload routing on the coupling facility
    Caching mechanisms are built into the coupling facility (CF) to reduce the number of I/O operations. CICS region status data is broadcast to the CF by target regions, and the data is subsequently read back by the routing regions when a route decision is being made. If CICS status data is broadcast at every change instance, and read back on every occasion that a route decision is made, the impact to the coupling facility might be considerable.
  10. Region status server, read interval parameter (READRS)
    You use the region status server read interval parameter in the CPLEXDEF, CSYSDEF, and MAS views to control how long region status data is cached by a routing region before requesting a refresh for sysplex optimized workload routing.
  11. Region status server, update frequency parameter (UPDATERS)
    You use the region status server update frequency parameter in the CPLEXDEF, CSYSDEF, and MAS views to control how often the coupling facility is updated with task throughput data for sysplex optimized workload routing.
  12. Region status server, top-tier parameter (TOPRSUPD)
    You use the region status server top-tier tuning parameter in the CPLEXDEF, CSYSDEF, and MAS views. It controls the workload when the workload management (WLM) max task health indicator is switched off for a target region, to limit updates to the coupling facility (CF) when the region is close to the MAXTASK (MXT) setting during periods of high throughput.
  13. Region status server, bottom-tier parameter (BOTRSUPD)
    You use the region status server bottom-tier tuning parameter in the CPLEXDEF, CSYSDEF, and MAS views to control the workload distribution updates to the coupling facility (CF) during periods of low throughput.
  14. Sysplex optimized workload management learning path: Summary
    In this learning path, you learned about optimizing your workloads by implementing a region status server and the benefits you can expect. For more information about sysplex optimized workload management, see the detailed topics in the information center that expand on the details provided by this learning path:
Parent topic: Tutorials

overview.html | Timestamp icon Last updated: Thursday, 27 June 2019