Before you partition cache memory into one or more CLPRs, calculate the cache capacity that you need for the storage system. If necessary, install additional cache memory.
The recommended cache capacity varies depending on the system configuration. System differences include:
- Number of mounted CBX pairs
- RAID level
- Number of installed drives
- Use of the following specialized applications:
- Dynamic Provisioning
- Dynamic Tiering
- active flash
- Universal Volume Manager
- Compatible XRC
Use this formula to calculate the recommended cache capacity for a CLPR:
Recommended cache capacity (GB) for a CLPR = CLPR-capacity (GB) – ceil(Cache-Residency-extents (MB) / 2,048) × 2 GB