Capacity-on-Demand (CoD)

A product feature whereby storage capacity is sold or enabled on a logical, as-needed basis instead of in increments based exclusively on the physical capacity of the system. In a CoD tape library, for example, there might be 100 physical cartridge slots present, but users might license them (make them available and usable) in 20-unit increments as needed. In CoD storage arrays or backup appliances, more physical capacity is installed than is initially used, with users able to license additional increments to make it available for use.