An LPAR cluster is shown in Figure 3-16. It contains three z/OS images and one Linux image  that is managed by the cluster. Included as part of the entire Parallel Sysplex is another z/OS  image and a CF image. In this example, the scope over which IRD has control is the defined  LPAR cluster. IRD features the following characteristics: WLM dynamically adjusts the number of logical processors within an LPAR and the  processor weight based on the WLM policy. The ability to move the processor weights  across an LPAR cluster provides processing power where it is most needed, based on  WLM goal mode policy. The processor management function is automatically deactivated when HiperDispatch is  active. However, the LPAR weight management function remains active with IRD with  HiperDispatch. For more information about HiperDispatch, see 3.7, “Logical partitioning”  on page 132. HiperDispatch manages the number of logical CPs in use. It adjusts the number of logical  processors within an LPAR to achieve the optimal balance between CP resources and the  requirements of the workload. GLYPH<SM590000> IRD processor management Figure 3-16 IRD LPAR cluster example Chapter 3. Central processor complex design  143