A Tier pool is registered as an FTRP of the storage device.
When a Tier pool is created from Web Console, an FTRP and FTSPs are both created in the storage device. Furthermore, from Web Console, it becomes possible to create an FTV in the storage device.
Specifying Assigned CM
An Assigned CM can be specified when performing the following operations.
When creating a Tier pool
When changing a layer number of Tier pool
When expanding the capacity of the sub-pool
Point
For the changing a layer number of the Tier pool and the expanding capacity of the sub-pool, the Assigned CM can be added only when the Assigned CM has been specified at the time the Tier pool was made.
As there is an effect on performance of access to the sub-pool due to the Assigned CM, it is recommended that all sub-pools contained in the Tier pool are assigned to the same Assigned CM.
It is possible to specify more than one Assigned CM, and by specifying an Assigned CM in relation to the Tier pool, it is possible to specify an Assigned CM of the entire Tier pool.
When multiple Assigned CMs are specified to the Tier pool, the Assigned CM is decided from the specified Assigned CMs using the round-robin method.
When creating a sub-pool in the Tier pool, it is possible to specify an Assigned CM of the sub-pool from the multiple Assigned CMs specified to the Tier pool.
When expanding the capacity of the sub-pool, take into account the Assigned CMs that have already been assigned to each sub-pool that has already been created, and assign an Assigned CM using the round-robin method. It is also possible to make a specification from the Assigned CM which is displayed in the Assigned CM list.
When a specification of an Assigned CM has been omitted, this is automatically assigned according to the implementation of the storage device.
Specification | Sub-Pool Specification | Assigned CM to Be Set | Explanation | ||||
|---|---|---|---|---|---|---|---|
Low | Middle | High | Low | Middle | High | ||
CM#0 | - | - | - | CM#0 | CM#0 | CM#0 | Configure CM#0 according to specification of pool |
CM#0, CM#1 | - | - | - | CM#0 | CM#1 | CM#0 | With Low as CM#0, Middle and High are configured with the round-robin method |
CM#0, CM#1 | CM#1 | - | - | CM#1 | CM#0 | CM#1 | Explicitly specify CM#1 for Low while Middle and High are configured with the round-robin method |
CM#0, CM#1 | - | CM#1 | - | CM#0 | CM#1 | CM#0 | With Low as CM#0, explicitly specify CM#1 for Middle while High is configured with the round-robin method |
CM#0, CM#1 | - | - | CM#1 | CM#0 | CM#1 | CM#1 | With Low as CM#0, Middle is configured with the round-robin method while explicitly specifying CM#1 for High |
Specification | Set Assigned CM | Sub-Pools | Assigned CM Which Are Set | Explanation | ||
|---|---|---|---|---|---|---|
Low | Middle | High | ||||
CM#0, CM#1 | CM#0 | CM#1 | CM#0 | Low | CM#1 | As 2 cases with CM#0 and 1 case with CM#1 have already been configured, configure CM#1 |
CM#0, CM#1 | CM#1 | CM#0 | CM#1 | Middle | CM#0 | As 1 case with CM#0 and 1 case with CM#0 have already been configured, configure CM#0 |
CM#0, CM#1 | CM#0 | CM#1 | CM#0 | High | CM#1 | As 2 cases with CM#0 and 1 case with CM#1 have already been configured, configure CM#1 |
CM#0, CM#1 | CM#0 | CM#1 | CM#1 | Low#1, Low#2 | CM#0 (Low#1), CM#0 (Low#2) | As 1 cases with CM#0 and 2 cases with CM#1 have already been configured, configure CM#0 |
Even when the configuration is of that other than 2CMs, the allocation can be performed similarly using the round-robin method.
Disk Auto-Selection
The disk can be automatically selected when performing the following operations.
When creating a Tier pool
When changing a layer number of Tier pool
When expanding the capacity of the sub-pool
Specify the necessary physical capacity when selecting automatically.
The disk can also be selected manually, as before.
