Capacity on Demand (CoD)
CoD provisions CPUs and memory. It enables you to activate (and, depending on the CoD option purchased, deactivate) unused CPUs and memory in a machine. These can then be allocated as required, and are charged for on a usage basis. The activation process can be either manual or automatic (known as reserve CoD), and permanent or temporary.
Where CoD is used to meet short-term peaks in processing demand, the minimum charge is one "processor day," which provides one CPU for 24 hours. Multiple CPUs can be provisioned in this way.
Unallocated CPUs and memory, whether active or inactive, are also used to replace failing parts. This process is transparent to the operating systems running on the failing hardware.