Diskless node

Diskless workstation refers to a work computer that does not have its own hard disk and refers to both operating system as well as data from one or more servers on a network.

After the computer starts, the diskless workstation involves the computer configuration protocols such as DHCP or BOOTP over the network. Part of the computer configuration example, the IP address, computer name and an executable boot image. To transfer the boot image, for example, TFTP is used. The boot image typically includes an operating system kernel, and start scripts. Other operating system software is stored on file servers on the network to which the diskless client via network file system such as NFS or AFS accesses.

Compared to fat clients, the use of diskless workstations can help to reduce the Administrierungsaufwand. Software updates and configuration changes need to be installed on the central file server and not be distributed to each individual computer. Also, the computer exchange can be simplified, as no software needs to be installed on a new computer. The potentially trouble- prone component hard drive eliminates the potentially distributed standing client machines.

Software license savings are not possible if the license fee depends on the number of users and is independent of the number of copies installed. The absence of hard drives saves the cost of these components in the client computers, but more resources may need to be invested in the file server or network infrastructure.

In addition, a central backup is simplified by the use of a central file server. Diskless workstations are also quieter, because besides the fans the hard disks cause the main noise in a computer. The disadvantage of such systems is, however, that if the network fails or all file servers, can be used at no more diskless workstation.

In contrast to a diskless workstation, a thin client is only responsible for displaying a graphical user interface. That is, the programs that are operated via a thin client will not run locally on the thin client but located on a server (terminal servers, blade PCs, virtual machine in a Virtual Desktop Infrastructure).