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cluster controller (CC)

A cluster controller is a central unit of a multi- user system, which is referred to in German as Gruppensteuerung or Mehrfachsteuerung.

The classic cluster controller takes over the communication control of several, dumb terminals or workstations in a terminal network. This often refers to a controller of the IBM 3170 family, for example the IBM 3174 or a compatible one. The cluster controller, for its part, is connected via a data line to a front-end processor( FEP) that regulates data traffic between the cluster controller and the mainframe. The Cluster Controller can be connected to the frontend processor or host either via a channel or via an SDLC connection.

Terminal network with mainframe, FEP and Cluster Controller

Terminal network with mainframe, FEP and Cluster Controller

In addition, there are cluster controllers with extended functionality, advanced cluster controllers, the so-called subhosts. Advanced Cluster Controllers have an operating system and are freely programmable, they enable communication and support application programs.

Informations:
Englisch: cluster controller - CC
Updated at: 28.03.2007
#Words: 143
Links: cluster, controller, unit (U), user, system
Translations: DE
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