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Bring yourself up to speed with our introductory content.

  • capacity on demand (COD)

    Capacity on demand (COD) is a purchasing option that allows companies to receive equipment with more computer processing, storage, or other capacity than the company needs at the time of purchase, and have that extra capacity remain unused and ... Continue Reading

  • motherboard tattoo

    A motherboard tattoo is a unique code that can be written in the basic input/output system (BIOS) of a computer to ensure that system restore or diagnostic compact discs (CDs) will work only on the machine or line of machines with which the CDs are ... Continue Reading

  • 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. Continue Reading

  • Ubuntu

    Ubuntu (pronounced oo-BOON-too) is an open source Debian-based Linux distribution. Sponsored by Canonical Ltd., Ubuntu is considered a good distribution for beginners. The operating system is intended primarily for personal computers (PCs) but can ... Continue Reading

  • power usage effectiveness (PUE)

    Power usage effectiveness (PUE) is a metric used to determine the energy efficiency of a data center. PUE is determined by dividing the amount of power entering a data center by the power used to run the computer infrastructure within it. (Continued... Continue Reading

  • server sprawl

    Server sprawl is a situation in which multiple, under-utilized servers take up more space and consume more resources than can be justified by their workload.Continue Reading

  • S/390

    S/390 is IBM's large server (or mainframe) line of computer systems, which are marketed to the world's Fortune 1000 and many mid-size companies as a "tried-and-true" system with a history that stretches back to the System/360 of the early 1960s.Continue Reading

  • P/390

    The P/390 is basically an IBM mainframe system adapted to run on a personal computer.Continue Reading

  • OS/390

    OS/390 is the IBM operating system most commonly installed on its S/390 line of mainframe server.Continue Reading

  • 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)Continue Reading

  • 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)Continue Reading

  • 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)Continue Reading

  • DRBD (Distributed Replicated Block Device)

    DRBD (Distributed Replicated Block Device) is a Linux-based software component that facilitates the replacement of shared storage systems by networked mirroring. DRBD makes it possible to maintain consistency of data among multiple systems in a ...Continue Reading

  • economizer

    An economizer is a mechanical device used to reduce energy consumption. Economizers recycle energy produced within a system or leverage environmental temperature differences to achieve efficiency improvements. (Continued...)Continue Reading

  • intelligent power management (IPM)

    Intelligent Power Management (IPM) is a combination of hardware and software that optimizes the distribution and use of electrical power in computer systems and data centers. While the installation of IPM involves up-front cost and ongoing ...Continue Reading

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