C - Definitions

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  • C

    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 unpaid for until the company actually requires it.

  • Categories of twisted-pair cabling systems

    A twisted-pair cabling system is a cable consisting of one or several pairs of copper wires.

  • CICS (Customer Information Control System)

    CICS (Customer Information Control System) is middleware that sits between the z/OS IBM mainframe operating system and business applications.

  • colocation (colo)

    A colocation facility (colo) is a data center or telecommunications facility in which a business can rent space for servers, storage devices, and other computing and networking hardware.

  • computer room air handler (CRAH)

    A computer room air handler (CRAH) is a device used frequently in data centers to deal with the heat produced by equipment.

  • configuration management database (CMDB)

    A configuration management database (CMDB) is a file -- usually in the form of a standardized database -- that contains all relevant information about the hardware and software components used in an organization's IT services and the relationships among those components.

  • converged infrastructure

    Converged infrastructure, sometimes called 'converged architecture,' is an approach to data center management that packages compute, networking, servers, storage and virtualization tools into a prequalified set of IT hardware.

  • crontab

    Crontab is a Unix command that creates a table or list of commands, each of which is to be executed by the operating system (OS) at a specified time and on a regular schedule.

  • Cygwin

    Cygwin is a collection of open source tools that allows Unix or Linux applications to be compiled and run on a Microsoft Windows operating system (OS) from within a Linux-like interface.

  • What are COTS, MOTS, GOTS and NOTS?

    COTS, MOTS, GOTS and NOTS are abbreviations that describe prepackaged software or -- less commonly -- hardware purchase alternatives. The four acronyms denote different classifications of software and hardware, each with its own unique characteristics and usage scenarios.

  • What is computer room air conditioning (CRAC)? CRAC vs. CRAH unit differences?

    A computer room air conditioning (CRAC) unit is a device that monitors and maintains the temperature, air distribution and humidity in a data center, network or server room.

  • What is continuous modeling (data center continuous modeling)?

    Continuous modeling is an approach to data center management that supplements infrastructure management (DCIM) tools with engineering simulation tools.