CacheCade 1157CacheCadeThe Dell PowerEdge RAID Controller (PERC) H700 and H800 cards supportCacheCade, a feature that can improve application performance byincreasing read caching capacity. The CacheCade feature makes use of high-performing solid state disks (SSDs) as a secondary tier of cache. CacheCadeprovides faster reads and maximizes transactional I/O performance.The use of SSDs for caching allows a large quantity of data to be present inthe cache, resulting in performance improvement in read-intensiveapplications. Some examples of read-intensive applications include onlinetransaction processing (OLTP), file server, and web server workloads.CacheCade allows for an increase in the I/O performance of hard disk drive(HDD)-based disk groups with the assistance of SSD technology.CacheCade Virtual Disk CharacteristicsThe CacheCade feature has the following characteristics:• Support for CacheCade virtual disks exists only on controllers containing 1GB of Non-Volatile (NV) Cache.• CacheCade virtual disks can only be created with SSDs.• The maximum combined size of CacheCade virtual disks is 512 GB.NOTE: Multiple CacheCade virtual disks may be created, but they arecombined to operate as a single cache pool up to the maximum size.• Data on virtual disks containing secured Self-Encrypting Disks (SEDs) orSSDs will not be cached by CacheCade.NOTE: Data on VDs with unsecured SEDs can be cached using CacheCade.• CacheCade virtual disks will only cache input reads that are smaller than64 KB.• CacheCade virtual disks are read cache only.• CacheCade virtual disks will not migrate to a controller that does notsupport CacheCade.
