Glossary A-C


Ambient Air Cooling - Ambient air cooling is the use of naturally cool air surrounding a data centre, to reduce heat inside the facility. The use of ambient air aims to maintain appropriate temperatures inside the data centre and can be referred to as ‘free cooling’.

Business Service Management (BSM) - BSM is an approach to overseeing information technology that highlights treating IT offerings as part of the larger enterprise strategy. It also provisions IT resources based on an understanding of the business’ most pressing needs.

Configuration Management Database (CMDB) - A configuration management database is a source that acts as a data warehouse for IT installations. The database contains all relevant information about the components of the IT system used within an organisation and the relationships between those components.

Corporate Average Data Centre Efficiency (CADE) - CADE is a metric used to rate the overall energy efficiency of an organisation’s data centres. It combines measurements of the energy efficiency and utilisation of IT equipment and facilities into a single percentage.

Carbon Usage Effectiveness (CUE) - CUE is a metric for measuring the carbon gas a data centre emits daily.

Cloud Computing - Cloud computing is a general term for the delivery of hosted services over the Internet. Cloud computing enables companies to consume computer resources as a utility, rather than having to build and maintain computing infrastructures in-house. 

Computer Room Air Conditioning Unit (CRAC) - A computer room air conditioning unit is a device that monitors and maintains the temperature, air distribution and humidity in a data centre or network room.

Computer Room Air Handler (CRAH) - A CRAH is a device that is used frequently in data centres to deal with the heat produced by equipment. Unlike a CRAC unit that uses mechanical refrigeration to cool the air introduced to a data centre, a CRAH uses fans, cooling coils and a water-chiller system to remove heat.

Computerised Maintenance Management System (CMMS) - A CMMS is software that helps an organisation track the status of maintenance tasks such as repairs. It can also track the location of replacement parts. CMMS can be deployed on-premises or as a web-based CMMS service.

Converged Data Centre - A converged data centre is one in which the hardware and software components have been purchased from a single vendor. The aim of a converged data centre is to reduce the manual labour and technical skills that are required to own and operate an on-premises or collocated data centre.

Converged Infrastructure - CI is an approach to data centre management that seeks to minimise compatibility issues between servers, storage systems and network devices while also reducing costs.

Corporate Cloud (internal cloud or corporate cloud) - Private cloud is a type of cloud computing that delivers similar advantages to public cloud, including scalability and self-service, but through a propriety architecture.

Critical Infrastructure - Critical infrastructure is the body of systems, networks and assets that are so essential that their continued operation is required to ensure the security of a given nation, its economy, and the public’s health and safety. The infrastructure deemed critical can vary per a nation’s needs, resources and development level.


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