Diskless workstation and Thin client
Diskless workstation
Alternatively referred to as a diskless node, dummy terminal, or dumb terminal, a diskless workstation is a networked computer that provides no local hard disk space or floppy disk drive access. Generally, these terminals will have a monitor, motherboard, network card, keyboard, and mouse. This term can also be used to describe any computer that has a hard drive but is booting and using applications from the network instead of from the local hard disk drive. This type of computer is often referred to as a hybrid computer or network computer.
Thin clients
The
thin client was first used in the mid to late 1990s, but the term
"thin client" was coined in 1993 by Tim
Negris, a VP at Oracle Corporation.
These very basic computers provide a graphical user interface and input and
output for the user. Thin clients are not typical computers, but rather a
terminal that relies on another computer system (usually a server) to supply
the operating system and software applications needed by the user. Multiple
thin clients can be connected to one master system, each running their own
"instance" of an operating system and software. In the picture to the right,
is an example of a Thin client from Dell.
Unlike a diskless workstation, a thin client does very little processing and
usually only runs a small client that handles the input and output and basic
display.
Why are these computers used?
These computers are generally used in a corporate and hazardous environment because of the below reasons.
- Much cheaper than a traditional computer.
- Saves energy and lowers overall power costs.
- No moving parts, like fans and hard disk drive platters. Helpful in production production floors, where dirt, dust, and heat are a concern.
- Because there are no moving parts they are less likely to fail, when compared with a normal computer.
- Easy to manage since it's the server you're maintaining not the hundreds or thousands of clients.
- More secure since all updates and data is handled at the server end.
- Replacement is much easier since its an immediate setup with no software or updates required.
Where are these computers used?
There are numerous places these types of computers can be used. However, they're most often found in corporations, schools, and libraries.
Also see: Blade, Client, Network definition, PXE, Smart terminal, Terminal, Thick client, Workstation