HP XP External Storage Software User Guide (T1706-96018, November 2011)

Cache can be partitioned for Company B as follows:
• CLPR0: 12 GB for the internal XP12000 P-VOL
• CLPR1: 4 GB for the EVA S-VOL and P-VOL
• CLPR2: 4 GB for the MSA S-VOL
• All external LU cache is disabled
To partition cache for external storage:
1. Determine the number and size of the partitions you need (see Determining the number and
size of needed partitions).
2. Create the partitions (see Creating cache partitions).
Determining the number and size of needed partitions
The minimum cache partition (CLPR) size is 4 GB. Determine the size you need for each CLPR being
used for external storage based on the total capacity of the assigned external volumes.
Table 5 (page 52) shows the recommended cache sizes for external storage CLPRs on open systems.
Table 6 (page 52) shows the same information for HP storage virtualization systems.
Table 5 Recommended individual CLPR cache size for external storage on open systems
Recommended cache size for CLPRExternal storage volume capacity assigned to CLPR
4 GBLess than 128,000 GB
8 GB128,000 GB or more
Table 6 Recommended individual CLPR cache size for external storage on HP storage virtual systems
Additional CLPRsCLPR0External volume
capacity assigned to
CLPR
4 GB4 GBLess than 1 TB
4 GB8 GB1 TB <= capacity <
16TB
4 GB12 GB16 TB <= capacity <
20 TB
4 GB16 GB20 TB <= capacity <
128 TB
8 GB24 GB128 TB or more
Creating cache partitions
Ensure the XP Disk/Cache Partition license is installed, you have Administrator authority on the
array, and you are in Modify mode in Remote Web Console. For more information about license
keys and user administration procedures, see the HP XP Remote Web Console user guide for
XP12000/XP10000 Disk Arrays and SVS 200.
1. In Remote Web Console, click the Install button in the left pane.
2. Click the Partition Definition tab.
3. In the Cache Logical Partition tree, right-click SLPR0 (if you have additional storage partitions
configured, click the storage partition you want the CLPR to be created in), and select Create
CLPR. The new CLPR is added to the tree.
4. Select the new CLPR in the tree, and change the size and other CLPR settings as needed
(Figure 24 (page 53)).
52 Managing cache with external storage