Changing The Tiering Policy Level On A Thp V-Vol; Changing New Page Assignment Tier Of A V-Vol - HP XP7 User Manual

The usage level among parity groups is automatically rebalanced when these operations are in
progress:
Expanding pool capacity
Shrinking pool capacity
Reclaiming zero pages
Reclaiming zero pages in a page release request issued by the host with the Write Same
command, for example.
Performing tier relocations several times
If you expand the pool capacity, Thin Provisioning Z moves data to the added space on a per-page
basis. When the data is moved, the usage rate among parity groups of the pool-VOLs is rebalanced.
Host I/O performance may decrease when data is moved. If you do not want to have the usage
level of parity groups automatically balanced, call HP technical support.
You can see the rebalancing progress of the usage level among parity groups in the View Pool
Management Status window (see
Provisioning Z automatically stops balancing the usage levels among parity groups if the cache
memory is not redundant or the pool usage rate reaches up to the threshold.

Changing the tiering policy level on a THP V-VOL

Use this procedure to change the tiering policy level on a THP V-VOL
Prerequisites
The Storage Administrator (Provisioning) role is required to perform this task.
Procedure
1. Open the Logical Devices window.
In Command View Advanced Edition:
a. On the Resources tab, click Storage Systems, and then expand All Storage Systems.
b. Expand the target storage system, right-click Volumes and select System GUI.
In Remote Web Console:
a. Expand the Storage Systems tree.
b. Click Logical Devices.
2. In the LDEVs pane of the Logical Devices window, select the LDEV ID of the LDEV with the
tiering policy you want to change.
3. Click Edit LDEVs.
4. In the Edit LDEVs window, click Tiering Policy, and then select a tiering policy.
5. Click Finish.
The Confirm window appears.
6. In the Task Name text box, type a unique name for the task or accept the default.
You can enter up to 32 ASCII characters and symbols, with the exception of: \ / : , ; * ? "
< > |. The value "date-window name" is entered by default.
7. Click Apply.
If the Go to tasks window for status check box is selected, the Tasks window appears.

Changing new page assignment tier of a V-VOL

Use this procedure to change the new page assignment tier of a V-VOL.
"View Pool Management Status window" (page 315)). Thin
Smart Tiers Z 105