A pod is a pre-designed collection of IT cabinets, power distribution and dedicated cooling distribution that are deployed as a unit, almost always as a pair of rows of cabinets. The use of this high density pod overlay method allows an existing legacy data centre to be transformed into a high density, high efficiency data centre during a consolidation project.
As far as efficiency is concerned, the annual PUE of data centres that use the high density pod overlay approach can be expected to be on the order of 1.35 at full load. While this may be not quite as good as a 1.2 PUE that is possible with a new purpose built data centre, it is much better than the typical 2.0 PUE observed before the pod overlay was deployed.
The self-contained nature of the pod means that minimal planning, design, or engineering is required to place a pod in any existing environment.