HP XP P9500 Storage - Manual (Page 100)

performance monitoring continues until the time when you specify as the ending time on
the next day.
- 30 minutes, 1 Hour, 2 Hours, 4 Hours or 8 Hours: Performance monitoring is performed
once every cycle you selected, starting at 00:00 hours. For these monitor cycle types,
you cannot specify the time of performance monitoring.
The information gathered by performance monitoring can be viewed with Remote Web
Console.
3. In Monitoring Mode, select Period Mode or Continuous Mode.
Select Period Mode to perform tier relocation with the specified cycle where you do not
need to specify the Monitoring Mode option.
Select Continuous Mode to perform tier relocation weighted to the past period monitoring
result.
4. In Buffer Space for New page assignment, type an integer value from 0 to 50 as the
percentage (%) to set for each tier.
The default value depends on the drive type of pool-VOL in each tier. The default value
of SSD is 0%. The default value of the type other than SSD is 8%.
5. In Buffer Space for Tier relocation, type an integer value from 2 to 40 as the percentage
(%) to set for each tier. The default is 2%.
15. Click Add. The created pool is added to the Selected Pools table.
16. Click Next.
The Create LDEVs window opens. See to “Creating a THP V-VOL” (page 101) to create LDEVs.
If Subscription Limit for all the created pools is set to 0%, the Create LDEVs window does not
open.
17. To finish the wizard, click Finish.
18. In the Confirm window, click Apply to register the setting in the task.
If Go to tasks window for status is checked, the Tasks window opens.
Working with THP V-VOLs
About THP V-VOLs
Thin Provisioning requires the use of THP V-VOLs, which are virtual volumes with no physical
memory space. In Thin Provisioning, multiple THP V-VOLs can be created.
A THP V-VOL is a volume in a thin provisioning storage system. It is the virtual volume from a TP
pool. Data in the TP pool is used via a THP V-VOL. A THP V-VOL is a virtual LU to some hosts.
On open systems, OPEN-V is the only supported emulation type on a THP V-VOL. You can define
multiple V-VOLs and assign them to a Thin Provisioning pool.
Relationship between a pool and THP V-VOLs
Before you can use Thin Provisioning, a THP V-VOL and a pool are required. Thin Provisioning
uses the pool volumes in a pool through the THP V-VOLs.
The following figure shows the relationship between a pool and THP V-VOLs.
100 Configuring thin provisioning