Reassigning logical partitions to shared processor pools

If you use more than one shared processor pool on your managed system, you can use the Hardware Management Console (HMC) to reassign logical partitions from one shared processor pool to another shared processor pool on your managed system.

Before you begin

You can use this procedure only if the managed system supports more than one shared processor pool and the HMC is at version 7 release 3.2.0, or later.

Any shared processor pool other than the default shared processor pool must be configured before you can assign a logical partition to the shared processor pool. (The default shared processor pool is preconfigured.) For instructions, see Configuring shared processor pools.

The HMC never allows the sum of the number of reserved processing units for a shared processor pool and the total number of processing units committed to the logical partitions that use the shared processor pool to be greater than the maximum number of processing units for the shared processor pool. (The default shared processor pool has no configured maximum number of processing units. The maximum number of processors available to the default shared processor pool is the total number of active, licensed processors on the managed system minus the number of processors that are assigned to dedicated processor partitions that are set not to share their dedicated processors.)

A shared processor pool cannot contain logical partitions that belong to different workload management groups. You therefore cannot reassign a logical partition with a defined workload management group to a shared processor pool that contains logical partitions that belong to another workload management group. (However, you can reassign a logical partition with a defined workload management group to a shared processor pool that contains only logical partitions that do not have a defined workload management group or that have the same workload management group as the reassigned logical partition.)

About this task

To reassign logical partitions from one shared processor pool to another shared processor pool by using the HMC Version 10.1.1020, or earlier, follow these steps:
  1. In the navigation pane, click Resources.
  2. Click All Systems. The All Systems page is displayed.
  3. In the work pane, select the system and click Actions > View System Properties. The Properties page is displayed.
  4. In the In the PowerVM area, click Shared Processor Pool.
  5. In the Shared Processor Pool page, click the Partitions tab.
  6. Click the name of a logical partition that you want to reassign from one shared processor pool to another shared processor pool.
  7. Select the new shared processor pool for the logical partition in the Pool name (ID) field and click OK.
  8. Repeat steps 6 and 7 for any other logical partitions that you want to reassign from one shared processor pool to another shared processor pool.
  9. Click OK.
To reassign logical partitions from one shared processor pool to another shared processor pool by using the HMC Version 10.2.1030, or later, follow these steps:
  1. In the navigation pane, click System resources.
  2. Click All Systems. The Systems page is displayed.
  3. In the navigation pane, click Shared processor Pool
  4. In the Shared Processor Pool page, click the Pool tab. Select a pool from the table to change the pool attributes.
  5. In the Shared Processor Pool page, click the Partitions tab.
  6. Click the name of a logical partition that you want to reassign from one shared processor pool to another shared processor pool.
  7. Select the new shared processor pool for the logical partition in the Pool name (ID) field and click OK.
  8. Repeat steps 6 and 7 for any other logical partitions that you want to reassign from one shared processor pool to another shared processor pool.
  9. Click OK.