Data Center Definitions

  • G

    GNU Linux

    The GNU Linux project was created for the development of a Unix-like operating system that comes with source code that can be copied, modified, and redistributed... (Continued)

  • green computing

    Green computing is the use of computers and related resources in an environmentally responsible manner. This involves the implementation of energy-efficient central processing units (CPUs), servers and peripherals as well as proper disposal of electronic waste (e-waste)... (Continued)

  • green data center

    A green data center is a repository for the storage, management, and dissemination of data in which the mechanical, lighting, electrical and computer systems are designed for maximum energy efficiency and minimum environmental impact... (Continued)

  • grid computing

    Grid computing uses small, distributed resources from servers and PCs to solve big problems. But will this architecture survive the cloud era?

  • grumble line

    A grumble line is the plotted amount of light from the sky that will be available in a building once an adjacent building has been erected.

  • gzip (GNU zip)

    Gzip (GNU zip) is a free and open source algorithm for file compression. The software is overseen by the GNU project.... (Continued)

  • H

    hard drive overwriter

    In e-cycling, a hard drive overwriter is a program or utility that repeatedly overwrites the data on a computer's hard drive with gibberish.

  • hardware clustering

    Hardware clustering (sometimes called operating system clustering) is a hardware-based method of turning multiple servers into a cluster (a group of servers that acts like a single system).

  • Hardy Heron (Ubuntu 8.04 LTS Server Edition)

    Hardy Heron is the code name for version 8.04 of Ubuntu, the open source Debian -based Linux distribution. Hardy Heron was released in April 2008 and succeeded Gutsy Gibbon. Hardy Heron is widely recognized as one of the most easy-to-use desktop Linux distributions for novice users. (Continued...)

  • Heartbeat

    Heartbeat is a program that runs specialized scripts automatically whenever a system is initialized or rebooted. Originally designed for two-node Linux-based clusters, Heartbeat is extensible to larger configurations... (Continued)

  • high availability (HA)

    In information technology, high availability refers to a system or component that is continuously operational for a desirably long length of time.

  • High Level Assembler (HLASM)

    High Level Assembler (HLASM) is IBM's assembler programming language and the assembler itself for the IBM z/OS, z/VM, OS/390, MVS, VM, and VSE operating systems. Released in June 1992, HLASM was the first new assembler language from IBM in twenty years. Version 4 was released in September 2000.

  • high-performance computing (HPC)

    High-performance computing (HPC) is the use of parallel processing for running advanced application programs efficiently, reliably and quickly. The term applies especially to systems that function above a teraflop or 1012 floating-point operations per second... (Continued)

  • Hot spot/cold spot

    A hot spot/cold spot is an undesirable tightly-focused local temperature variation which often occurs when data center equipment is improperly cooled.

  • hot/cold aisle

    Hot aisle/cold aisle is a layout design for server racks and other computing equipment in a data center. The goal of a hot aisle/cold aisle configuration is to conserve energy and lower cooling costs by managing air flow.

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