VM pinning

For customers that have installed software on Power VMs that is licensed by host serial number and LPAR ID, Skytap allows customers to pin individual LPARs to a host. When a VM is pinned, it will always use the same host serial number and LPAR ID, whether it is running or not.

Make sure to pin a VM before you activate any software licenses.

  • To guarantee that computer resources are available, pinned VMs consume compute resources whether the VM is running or not, and those resources are billed regardless of the run-state of the pinned LPARs.
  • If you disable and then re-enable VM pinning for a VM, Skytap can’t guarantee that the VM will run with the same host serial number and LPAR ID as before.
  • If you save an environment as a template, the VM pinning settings are not stored with the template.
  • If you copy the environment to another, the VM pinning settings are not saved with the copy.
To pin a VM

Enable VM pinning from the Hardware tab of the VM Settings page.

You can enable VM pinning only when the VM is powered off.

  1. Navigate to the environment that contains the VM you want to edit.
  2. Click environment settings (Settings).

    vm settings

    If the Settings button is not visible, you do not have permission to edit the VM settings. Work with your instructor or Skytap administrator to edit these settings.

  3. The VM Settings page displays. Click the Hardware tab.
  1. In the Licensing section, select Enable VM pinning.

    VM pinnng checkbox

  2. Start the VM. Skytap assigns the LPAR to a host, and records both the host serial number and the LPAR ID to ensure that every time the LPAR is turned off and back on again, it always runs on the same host with the same LPAR ID.

    When you start a pinned VM for the first time, it is assigned to a host. After the VM is assigned to a host, the compute resources for that VM are billed as though the VM were running, regardless of the actual power-state of the VM. This is necessary to guarantee that the VM’s compute resources are always available.

  3. Activate the software license with the host serial number and LPAR ID displayed on the VM Settings page.