Maximum number of central processors

The maximum number of CPs that can be defined depends on:

• The number of CPs that are available.

  The maximum number of logical cores available for definition in a single LP is the total number of CPs achievable through concurrent CPU upgrade or 200, whichever is less.

  Notes:

  1. The maximum initial logical cores defined for a dedicated partition equals physical cores online for the current model minus physical cores currently dedicated and online to other dedicated partitions minus the maximum online number of shared CPs among all the activated logical partitions that are using shared CPs.
  2. The maximum initially online logical cores defined for a shared partition equals physical cores online for the current model minus physical cores currently dedicated and online to other partitions using dedicated CPs.
  3. The preceding rules for maximum CPs apply independently to each type (general purpose, ICF, IFL, or zIIP) of processor defined to the logical partition. For instance, when defining a logical partition to use a combination of general purpose CPs and zIIPs, the rules for the maximum initially online of each type of processor is calculated independently against what is currently installed and in use for that type of physical processor.
• The number of CPs that are supported by the required control program.

  Some control programs support as many as 100 CPs. The number of CPs defined for an LP should not exceed the number supported by the control program used for that LP. The stated maximum supported processors for a particular control program is applied against the sum of the counts of all processor types defined to the partition.