Assignment tier when pool-VOLs are deleted
When you delete pool-VOLs, the pages allocated to the pool-VOLs are moved to other pool-VOLs. The following table shows the tier numbers to which pages are allocated before and after pool-VOLs are deleted. This operation does not depend on the tiering policy or the settings of newly assigned tiers. Relocate tiers after deleting pool-VOLs.
The following table describes page allocation in a 3-tier configuration.
|
Tier of deleted pool-VOLs |
Order in which pages are allocated to tiers |
Description |
|
Tier 1 |
Tier 1, Tier 2, and Tier 3 |
If there is free space in Tier 1, pages are allocated to Tier 1. If there is no free space in Tier 1, pages are allocated to Tier 2. If there is no free space in Tier 1 and Tier 2, pages are allocated to Tier 3. |
|
Tier 2 |
Tier 2, Tier 1, and Tier 3 |
If there is free space in Tier 2, the pages are allocated to Tier 2. If there is no free space in Tier 2, pages are allocated to Tier 1. If there is no free space in Tier 1 and Tier 2, pages are allocated to Tier 3. |
|
Tier 3 |
Tier 3, Tier 2, and Tier 1 |
If there is free space in Tier 3, pages are allocated to Tier 3. If there is no free space in Tier 3, pages are allocated to Tier 2. If there is no free space in Tier 2 and Tier 3, pages are allocated to Tier 1. |
The following table describes page allocation in a 2-tier configuration.
|
Tier of deleted pool-VOLs |
Order in which pages are allocated to tiers |
Description |
|
Tier 1 |
Tier 1 and Tier 2 |
If there is free space in Tier 1, pages are allocated to Tier 1. If there is no free space in Tier 1, pages are allocated to Tier 2. |
|
Tier 2 |
Tier 2 and Tier 1 |
If there is free space in Tier 2, pages are allocated to Tier 2. If there is no free space in Tier 2, pages are allocated to Tier 1. |