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hardware appliance

A device that is dedicated to a specific function in contrast to a general-purpose computer. The hardware comes pre-installed with its operating system and application. Many consider the router to be the first network appliance.

A "software appliance" is the software alone, which must be installed in the computer. Following is a list of common hardware appliances. See virtual appliance.


    caching appliance
    digital appliance
    email appliance
    firewall appliance
    Internet appliance
    Internet server appliance
    network appliance
    server appliance





virtual appliance

An application and its operating system packaged together for a virtualized environment such as VMware or Xen. A virtual appliance is the software equivalent of a hardware device that performs a fixed set of functions (see hardware appliance). See system image.

Faster and Simpler
The regular process of deploying a new application in a virtualized computer is to set up a new virtual machine (VM) partition, install the operating system and then the application. The processes are time consuming and configuration mistakes can be made. In contrast, virtual appliance deployment is faster because the appliance image (application and OS) is copied to the virtual machine pre-installed and pre-configured. The application and OS have already been tested together, and running the software is less error prone. See virtual machine, virtualization, software appliance and NFV.




A Virtual Appliance Player
This virtual appliance is running in a regular non-virtualized Windows machine, using VMware Player, a VMware "runtime engine." It lets users test the behavior of applications running in a virtual machine environment in their own computer before deciding to virtualize the entire machine with VMware. This appliance includes the Ubuntu Linux operating system packaged with open source applications. See VMware Player.






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Hardcardhardware as a service
hardcopyhardware circuit
harddiskhardware dependence
harddrivehardware dependent
hardeninghardware engineer
hardrivehardware failure
hardwarehardware firewall
hardware abstraction layerhardware handshake
hardware accelerationhardware-in-the-loop
hardware acceleratorhardware independence

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