HP StorageWorks XP Remote Web Console Software - Manual (Page 50)

50 Managing cache with external storage
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 6 shows the
recommended cache sizes for external storage CLPRs on open systems. Table 7 shows the same
information for HP storage virtualization systems.
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 XP Remote Web Console. For more information about license keys and user
administration procedures, see the HP StorageWorks XP Remote Web Console user guide for
XP12000/XP10000/SVS200.
1. In XP 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.
Table 6 Recommended individual CLPR cache size for external storage on open systems
External storage volume capacity assigned to CLPR Recommended cache size for CLPR
Less than 128,000 GB 4 GB
128,000 GB or more 8 GB
Table 7 Recommended individual CLPR cache size for external storage on HP storage virtualization
systems
External volume capacity assigned to CLPR CLPR0 Additional CLPRs
Less than 1 TB 4 GB 4 GB
1 TB <= capacity < 16TB 8 GB 4 GB
16 TB <= capacity < 20 TB 12 GB 4 GB
20 TB <= capacity < 128 TB 16 GB 4 GB
128 TB or more 24 GB 8 GB