Data center servers Definitions

  • J

    job

    In certain computer operating systems, a job is the unit of work that a computer operator gives to the operating system.

  • Job Entry Subsystem (JES)

    Job Entry Subsystem (JES) is a subsystem of the OS/390 and MVS mainframe operating systems that manages 'jobs' (units of work) that the system does. Each job is described to the operating job control language (JCL).

  • job scheduler

    A job scheduler is a program that enables an enterprise to schedule and, in some cases, monitor computer 'batch' jobs (units of work, such as the running of a payroll program).

  • K

    kernel

    The kernel is the essential center of a computer operating system, the core that provides basic services for all other parts of the operating system.

  • kernel panic

    A kernel panic is a computer error from which the operating system (OS) cannot quickly or easily recover. The term applies primarily to Unix-based systems and to Mac OS X... (Continued)

  • kernel-based Virtual Machine (KVM)

    Kernel-based Virtual Machine (KVM) is a free, open source virtualization architecture for Linux distributions.

  • L

    Linux distros (Linux distribution)

    A Linux distribution -- often shortened to "Linux distro" -- is a version of the open source Linux operating system that is packaged with other components, such as an installation programs, management tools and additional software such as the KVM hypervisor.

  • Linux kernel panic

    Linux kernel panic occurs when the operating system discovers a potentially fatal error that affects the Linux kernel.

  • Linux operating system

    Linux is a Unix-like, open source and community-developed operating system for computers, servers, mainframes, mobile devices and embedded devices.

  • Linux stream

    A Linux stream is information traveling in a Linux shell from one process to another via a pipe, or from one file to another via a redirect.

  • Linux swappiness

    Linux swappiness is the rate at which a Linux platform's kernel moves pages into and out of active memory.

  • logical volume management (LVM)

    Logical volume management (LVM), a form of storage virtualization, offers system administrators a more flexible approach to managing disk storage space than traditional partitioning.

  • Logwatch

    Logwatch is a log analysis program that parses through system logs and generates periodic reports based on criteria specified by the user. These reports are generated immediately after Logwatch has run (normally every night), and can be transmitted by e-mail to a network administrator.

  • M

    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 sold.

  • multi-core processor

    A multi-core processor is an integrated circuit (IC) to which two or more processors have been attached for enhanced performance, reduced power consumption, and more efficient simultaneous processing of multiple tasks.

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