Planning Superdome Configurations

Planning Superdome Configurations
Building Blocks and Definitions
Chapter 136
What is an XBC (Crossbar Controller)?
Terms:
64-way-capable system; CPU cabinet:
see “What is a CPU Cabinet?” on page 23.
Cell: see “What is a Cell?” on page 27.
Cell Controller: see “Cell Controller (CC)” on page 30.
Partition: see “What is a Partition?” on page 22.
Full Glossary on page 11 .
Each CPU cabinet contains two crossbar backplane boards. Each cell
plugs into one of these crossbars by means of a pair of connectors,
forming a connection between the cell controller (CC) and the crossbar
controller. The crossbar controller comprises two chips and is also known
as the XBC.
There are two crossbars (and thus two XBCs) in a CPU cabinet, and a
maximum of four cells plug into each, allowing a maximum of eight cells
in a cabinet.
This diagram shows how cells connect to the backplane.