Removing a paging VIOS partition from the shared memory pool
You can use the Hardware Management Console (HMC) to remove a Virtual I/O Server (VIOS) logical partition (hereafter referred to as a paging VIOS partition) from the shared memory pool.
Before you begin
- Verify that two paging VIOS partitions are currently assigned to the shared memory pool.
- Shut down all of the shared memory partitions that use the paging VIOS partition that you plan to remove. You must shut down all of the shared memory partitions that use the paging VIOS partition (that you plan to remove) as the primary paging VIOS partition, and you must shut down all of the shared memory partitions that use the paging VIOS partition (that you plan to remove) as the secondary paging VIOS partition. For instructions, see Shutting down and restarting logical partitions.
- Verify that you are a super administrator or an operator of the HMC.
About this task
The following table describes the situations in which you can remove a paging VIOS partition.
| State of one paging VIOS partition | State of the other paging VIOS partition | Removal options |
|---|---|---|
| Running | Running | You can remove either paging VIOS partition. |
| Running | Shut down | You can remove only the paging VIOS partition that is shut down. |
| Shut down | Running | You can remove only the paging VIOS partition that is shut down. |
| Shut down | Shut down | You can remove either paging VIOS partition;
however, you need to reassign the paging space devices to the shared
memory pool when you activate the remaining paging VIOS partition. To avoid adding the paging space devices again, you can activate one of the paging VIOS partitions and then remove the other paging VIOS partition. |
When you remove a paging VIOS partition from the shared memory pool, the following configuration changes occur:
- Paging space devices that were common become independent.
- The HMC changes
the configuration of each shared memory partition to use the remaining
paging VIOS partition as the primary and only paging VIOS partition:
- If a shared memory partition uses only one paging VIOS partition
and you remove that paging VIOS partition, the HMC changes the configuration
of the shared memory partition to use the remaining paging VIOS partition.
When you activate the shared memory partition, the HMC automatically reflects
the name of the current paging VIOS partition in the partition profile.
For example, two paging VIOS partitions, VIOS_A and VIOS_B, are assigned to the shared memory pool. A shared memory partition, SMP1, uses only VIOS_A as its paging VIOS partition. You remove VIOS_A from the shared memory pool. When you activate SMP1, the HMC automatically shows VIOS_B as the primary and only paging VIOS partition in the partition profile.
- If a shared memory partition uses two paging VIOS partitions and you remove a paging VIOS partition, the HMC changes the configuration of the shared memory partition to use the remaining paging VIOS partition as the primary and only paging VIOS partition. When you activate the shared memory partition, the HMC ignores the primary and secondary settings in the partition profile and assigns the remaining paging VIOS partition as the primary and only paging VIOS partition for the shared memory partition. If you want to save the configuration, you can update the partition profile or save the logical partition configuration to a new partition profile.
- If a shared memory partition uses only one paging VIOS partition
and you remove that paging VIOS partition, the HMC changes the configuration
of the shared memory partition to use the remaining paging VIOS partition.
When you activate the shared memory partition, the HMC automatically reflects
the name of the current paging VIOS partition in the partition profile.
For more information about managing shared memory pools, see Managing shared memory pools.
What to do next
- If you removed a paging VIOS partition that was shut down and
the other paging VIOS partition was also shut down, complete the following
steps:
- Activate the remaining paging VIOS partition. For instructions, see Activating a logical partition.
- Remove the remaining paging space devices from the shared memory pool and assign them again to the shared memory pool. Even though the paging space devices become independent when you remove a paging VIOS partition from the shared memory pool, they cannot be recognized as such until you reassign them to the shared memory pool. For instructions, see Adding and removing paging space devices to and from the shared memory pool.
- If the paging VIOS partition that you removed was the only paging VIOS partition used by a shared memory partition and the remaining paging VIOS partition does not have access to an available paging space device that meets the size requirements of the shared memory partition, assign such a paging space device to the shared memory pool. For instructions, see Adding and removing paging space devices to and from the shared memory pool.
- Activate all of the shared memory partitions that you previously shut down so that your changes can take effect. For instructions, see Activating a logical partition.