Overview of entitlement

When the combined 4HRA of all LPARs and groups exceeds MSU limit, typically:

  • Some LPARs and groups have 4HRAs below their entitlement
  • Other LPARs and groups have 4HRAs above their entitlement

Related topic

Entitlement-scenarios

For LPARs and groups with a 4HRA below entitlement, iCap sets their DCs or GCLs slightly above the 4HRA. These additional MSUs reduce the risk that LPARs or groups are accidentally capped if their 4HRA increases in the time between samples.

Then, the leftover (unused) MSUs are distributed to other LPARs or groups in need of MSUs. The unused MSUs are called gray-space MSUs.

To avoid being soft capped (temporarily capped), LPARs and groups with a 4HRA above entitlement require additional MSUs. These LPARs and groups can compete for gray-space MSUs and are ranked according to one of the following items:

  • Priority
  • Adjusted Low Importance Workload Percentage
  • Ratio 4HRA/entitlement

Important

Setting the MAXDCGCL and CPCMSUs parameters can limit the amount of MSUs that an LPAR or group receives, and might prevent an LPAR or group from receiving its full entitlement.


How iCap calculates the entitlement of an LPAR or group

Using the Proportion parameter (explained in LPAR-level-and-group-level-parameters), iCap calculates the entitlement of an LPAR or group as follows:

 [PROPORTION ÷ SUM(ALL PROPORTIONS)] × MSULIMIT
Example

In this example, the value of MSULIMIT is 500.

      LPAR/group   Proportion   Entitlement
     ----------   -----------  -----------
     GROUPGGG     35           175
     LPARAAA      20           100
     LPARBBB      15           75
     GROUPHHH     25           125
     LPARCCC      5            25

iCap calculates the entitlement as follows:

  • GROUPGGG— (35 ÷ 100) × 500 = 175
  • LPARAAA— (20 ÷ 100) × 500 = 100
  • LPARBBB— (15 ÷ 100) × 500 = 75
  • GROUPHHH— (25 ÷ 100) × 500 = 125
  • LPARCCC— (5 ÷ 100) × 500 = 25

 

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