glossary category

Globally accepted metric that is described by The Green Grid in several whitepapers. PUE illustrates the total energy used by a data center divided by the energy used by ICT equipment in that data center

Also known as access floor. Raised floors are a building system that utilizes pedestals and floor panels to create a cavity between the building floor slab and the finished floor where equipment and furnishings are located. The cavity can be used as an air distribution plenum to provide conditioned air throughout the raised floor area. The cavity can also be used for routing of power/data cabling infrastructure

A configuration of memory cells that hold data for processing by a computer's processor. The term random derives from the fact that the processor can retrieve data from any individual location, or address, within RAM

A compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system (NFPA definition)

Structure for housing electronic equipment. Differing definitions exist between the computing industry and the telecommunications industry
* Computing industry: A rack is an enclosed cabinet housing computer equipment. The front and back panels may be solid, perforated, or open depending on the cooling requirements of the equipment within

Time rate of doing work usually expressed in horsepower or watts

The junction point between the UPS and the cabinets containing equipment

Used to denote the total amount of electrical power being delivered to electronic equipment within a given rack. Often expressed in kilowatts (kW), this is often incorrectly equated to be the heat dissipation from the electrical components of the rack

The set of benchmark rules that defines what constitutes a valid full disclosure for that benchmark. Usually these define what parts of the benchmark configuration and the system configuration(s) that need to be detailed and disclosed

See exchanger, rotary heat