Data center servers Definitions

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  • R

    Red Hat Satellite

    Red Hat Satellite is an IT infrastructure management tool primarily used to monitor and manage Red Hat Enterprise Linux environments.

  • Resource Access Control Facility (RACF)

    RACF (Resource Access Control Facility) is the IBM security management product for its mainframe (large server) operating system, OS/390 (MVS) as well as for its VM operating system.

  • Restriction of Hazardous Substances Directive (RoHS Directive)

    The Restriction of Hazardous Substances (RoHS) Directive is a set of criteria formulated by the European Union (EU) to regulate the use of toxic materials in electrical and electronic devices, systems, and toys... (Continued)

  • Rexx

    Rexx is an interpreted script language developed by IBM originally for use by personal users of large operating systems.

  • RPM Package Manager (Red-hat Package Manager)

    RPM Package Manager (also known simply as RPM), originally called the Red-hat Package Manager, is a program for installing, uninstalling, and managing software packages in Linux. RPM was developed on the basis of the Linux Standard Base (LSB). In latter-day usage, the "RPM" portion of this term arises from the fact that .rpm is the default extension for files used by the program.

  • rsync

    Rsync is a free software utility for Unix- and Linux-like systems that copies files and directories from one host to another. Rsync is available on most Linux distributions by default.

  • runlevel

    A runlevel is a Linux operating state that determines which programs can execute when the operating system restarts.

  • S

    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.

  • scalability

    It is the ability of a computer application or product (hardware or software) to continue to function well as it (or its context) is changed in size or volume in order to meet a user need.

  • screen scraping

    Screen scraping is the act of copying information that shows on a digital display so it can be used for another purpose.

  • SELinux (Security-Enhanced Linux)

    SELinux, or Security-Enhanced Linux, is a part of the Linux security kernel that acts as a protective agent on servers.

  • server blade

    A server blade is a thin, modular electronic circuit board containing one, two, or more microprocessors and memory, that is intended for a single, dedicated application (such as serving Web pages) and that can be easily inserted into a blade server, which is a space-saving rack with many similar servers. One product offering, for example, makes it possible to install up to 280 blade server modules vertically in multiple racks or rows of a single floor-standing cabinet. Blade servers, which share a common high-speed bus, are designed to create less heat and thus save energy costs as well as space.

  • server consolidation

    Server consolidation is an approach to the efficient usage of computer server resources in order to reduce the total number of servers or server locations that an organization requires.

  • 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.

  • shell

    Shell is a UNIX term for the interactive user interface with an operating system.

  • shell script

    A shell script is a text file that contains a sequence of commands for a UNIX-based operating system.

  • single point of failure (SPOF)

    A single point of failure (SPOF) is a potential risk posed by a flaw in the design, implementation or configuration of a circuit or system in which one fault or malfunction causes an entire system to stop operating.

  • SuperZap

    SuperZap is an IBM utility program used to install zaps or fixes to MVS operating systems or application program code that is causing a problem.

  • SuSE

    SuSE (pronounced soo'-sah) is a German Linux distribution provider and business unit of Novell, Inc.

  • SUSE Linux Enterprise Server (SLES)

    SUSE Linux Enterprise Server (SLES) is a Linux-based server operating system created and maintained by the German-based organization, SUSE.

  • SUSE Manager

    SUSE Manager is an open source infrastructure management tool for Linux systems.

  • T

    Teraplex (Teraplex Integration Center)

    Teraplex (short for Teraplex Integration Center) is the name IBM has given to its 'real life' testing centers whose purpose is to allow IBM customers and business partners to test very large database (VLDB) applications on a full-scale basis by using...

  • the Open19 project

    The Open19 project is aimed at standardizing servers, storage and networking components into a common set of form factors for any Electronic Industries Association (EIA) 19-inch data center rack. The initiative was launched by LinkedIn Corp. in 2016.

  • TIA-942

    TIA-942 is a standard developed by the Telecommunications Industry Association (TIA) to define guidelines for planning and building data centers, particularly with regard to cabling systems and network design...(Continued)

  • tin whiskers

    Tin whiskers are individual crystals of tin that grow spontaneously from a tinned surface, usually as a result of stress of some sort... (Continued)

  • twin server (0.5 U server)

    A twin server has two compute nodes housed side-by-side in 1U of data center rack space. Because each server node fills half of 1U, a twin server may also be referred to as a 0.5U server.

  • U

    U (measurement)

    A U is a standard unit of measure for designating the height in computer enclosures and rack cabinets.

  • 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 also be used on servers. The word "ubuntu" is from the African Zulu language and translates as "humanity to others." (Continued...)

  • Unix

    Unix -- often spelled UNIX, especially as an official trademark -- is a multi-user operating system designed for flexibility and adaptability.

  • Uptime Institute, Inc.

    The Uptime Institute, Inc. is a consortium of companies devoted to maximizing efficiency and uptime in data centers and IT (information technology) organizations... (Continued)

  • V

    VSAM (Virtual Storage Access Method )

    VSAM (Virtual Storage Access Method ) is a file management system for IBM's larger operating systems, including its primary mainframe operating system, MVS, now called OS/390. (...Continued)

  • W

    Waste Electrical and Electronic Equipment Regulation (WEEE)

    Waste Electrical and Electronic Equipment Regulation (WEEE) is a directive in the European Union that designates safe and responsible collection, recycling and recovery procedures for all types of electronic waste. 

  • white box server

    A white box server is a generic server made from commercially available retail computer parts. The phrase "white box" merely indicates that the equipment is generic or brand-agnostic -- the server can be any color.

  • workload

    In computing, the workload is the amount of processing that the computer has been given to do at a given time.

  • Y

    Yellowdog Updater, Modified (YUM)

    Yellowdog Update, Modified (YUM) is a program that manages installation, updates and removal for Red Hat package manager (RPM) systems. YUM allows the user to update groups of machines without having to update each RPM separately.

  • Yet another Setup Tool (YaST)

    YaST handles much of the administration load, offers a simple graphical interface and sets up setting system parameters easily.

  • Z

    z/OS

    Z/OS is a 64-bit operating system (OS) developed by IBM for its family of z/Architecture enterprise mainframe computers, including the zEnterprise 196 and zEnterprise 114.

  • z990 (T-Rex)

    The z990, also known by its code name T-Rex, is a 64-bit mainframe computer from IBM that contains 32 processors, together capable of executing approximately 9,000 million instructions per second (MIPS), nearly three times the processing power...

  • zinc whiskers

    Zinc whiskers are tiny growths of elemental zinc that form on the surfaces of objects that are electroplated, or galvanized, with zinc.

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