Creating Dynamic Provisioning pools by selecting pool-VOLs automatically

Use this procedure to create a Dynamic Provisioning pool by selecting pool-VOLs automatically.

Before you begin

Procedure

1. Click Storage Systems, and then expand the Storage Systems tree.

2. Click Pools.

3. Click Create Pools.

4. In the Create Pools window, select Dynamic Provisioning from the Pool Type list.

5. From the Multi-Tier Pool field, select Disable.

6. From the Pool Volume Selection field, select Auto.

   NoteSelect Manual if creating a pool that contains LDEVs in a parity group with accelerated compression enabled.

7. Select pool-VOLs as follows:

   1. From the Resource Group list, select the resource group name of the pool-VOL.

   2. From the Performance list, select the performance of the pool.

   3. In the Total Capacity list, specify the capacity of the pool.

      Values are displayed in Total Pool Volumes and Total Capacity. These values are greater than the specified value of the pool capacity. If you change the pool configuration, perform steps d, e, and f.

   4. Click Change Pool Configuration.

      The Change Pool Configuration Pattern window appears. You can change the pool configuration that is automatically selected.

   5. From the Pool Configuration Patterns table, select the pool configuration row. Then click Select.

      Note

      • You can select the pool configuration on a parity group basis.
      • The priority of the pool configuration is determined by these conditions:

        Priority 1: There is no free space in the parity group and one LDEV exists in the group.

        Priority 2: There is no free space in the parity group and multiple LDEVs exist in the group.

        Priority 3: There is free space in the parity group and multiple LDEVs exist in the group.

      • The following items are not displayed in the Pool Configuration Patterns table:

        Parity groups with LDEVs that cannot be used as pool-VOLs.

        Pool configuration patterns that contain more than 1,024 LDEVs.

   6. Click OK.

      The information in the Pool Configuration Patterns table is applied to Total Pool Volumes and Total Capacity.

8. In Assign Deduplication System Data Volume, select Yes or No.

   Note You cannot select Yes in the following cases:

   • Enable is selected for Data Direct Mapping.
   • The dedupe and compression license is not installed.
   • Enable is selected for Multi-Tier Pool.
   • Pool volumes are not selected.
   • The number of available LDEV IDs is not enough.
   • The number of available cache management devices is not enough.

9. If you want to change the deduplication system data volume options, click Change Deduplication System Data Volume Options:

   1. To change LDEV Name, specify the prefix characters and the initial number for this LDEV.

   2. To change Initial LDEV ID, specify the number of LDKC, CU, LDEV, and Interval. To confirm used LDEV IDs, click View LDEV IDs to confirm the used LDEV IDs in the View LDEV IDs window.

   3. To change Initial SSID, specify the 4-digit SSID as a hexadecimal number (0004 to FFFE). To confirm used SSIDs, click View SSIDs to confirm the used SSIDs in the View SSIDs window.

   4. Click OK to save your changes and return to the Create Pools window.

10. Enter the name in the Pool Name text box.

11. Click Options.

12. In the Initial Pool ID text box, type the number of the initial pool ID, from 0 to 127.

    When you specify a pool ID that was previously registered, the smallest available ID is displayed by default instead of the ID you specified. If a pool ID is unavailable, no number is displayed.

13. In the Subscription Limit text box, enter an integer value from 0 to 65534 as the subscription rate (%) for the pool.

    If no number is entered, the subscription rate is set to unlimited.
    NoteBecause the setting of the Subscription Limit for a Thin Image pool is unlimited, you should set unlimited if the pool will contain Thin Image pairs and snapshot data.

14. In the Warning Threshold text box, enter an integer value from 1 to 100 as the rate (%) for the pool. The default value is 70%.

15. In the Depletion Threshold text box, enter an integer value from 1 to 100 as the rate (%) for the pool. The default value is 80%.

    Enter a value that is equal to or greater than the value of the Warning Threshold.

16. In Suspend TI pairs when depletion threshold is exceeded, select Yes or No.

    This option enables you to stop the Thin Image pair split process and prioritize the writing process to DP-VOLs when the free capacity of a Dynamic Provisioning pool that contains Thin Image pairs and snapshot data is depleted. If you select Yes, SIM code 62Exxx is output when the pool used capacity exceeds the depletion threshold. After this SIM code is output, if you attempt to split a Thin Image pair, the operation fails and the pair is suspended by error (PSUE).

17. In Protect V-VOLs when I/O fails to Blocked Pool VOL, select Yes or No. If Yes is selected, when the pool-VOL is blocked, DP-VOL is protected from reading and writing requests. At the same instant, the access attribute of the DP-VOL is changed to the Protect attribute.

    This option applies only to DP-VOLs. It does not apply to V-VOLs used by Thin Image pairs.

18. In Protect V-VOLs when I/O fails to Full Pool, select Yes or No. If Yes is selected, when the pool usage reaches the full size, DP-VOL is protected from reading and writing requests. At the same instant, the access attribute of the DP-VOL is changed to the Protect attribute.

    This option applies only to DP-VOLs. It does not apply to V-VOLs used by Thin Image pairs.

19. Click Add.

    The created pool is added to the Selected Pools table. If invalid values are set, an error message appears.

    If an item that must be set is not entered or selected, you cannot click Add.

    The Pool Type, Pool Volume Selection, and Pool Name must be set. If the required items are not entered or selected, you cannot click Add.

    If you select a row and click Detail, the Pool Properties window appears. If you select a row and click Remove, the message appears asking whether you want to remove the selected row or rows. If you want to remove the row, click OK.

20. Click Next.

    The Create LDEVs window appears.

    If Subscription Limit of the created pool is set to 0%, the Create LDEVs window does not appear.

    Click Finish, and the Confirmation window appears.

21. Check the settings in the Confirmation window, and then enter the task name in Task Name.

    Select the pool radio button and then click Details. The Pool Properties window appears.

22. Click Apply

    The tasks are registered. If the Go to tasks window for status check box is selected, the Tasks window appears.

Parent Topic

• Creating pools

  When you create a pool, you select the pool volumes (pool-VOLs) for the pool (manually or automatically) and set options such as the subscription limit and the warning and depletion thresholds for the pool. You can also enable options such as V-VOL protection and data deduplication.