1983 Reports

The DADO Parallel Computer

Stolfo, Salvatore

DADO is a parallel, tree-structured machine designed to provide significant performance improvements in the execution of large production systems. A full-scale production version of the DADO machine would comprise a large (on the order of a hundred thousand) set of processing elements (PE's), each containing its own processor, a small amount (8K bytes, in the current prototype design) of local random access memory, and a specialized I/O switch. The PE's are interconnected to form a complete binary tree. This paper describes the organization of, and programming language for two prototypes of the DADO system. We also detail a general procedure for the parallel execution of production systems on the DADO machine and outline how this procedure can be extended to include commutative and multiple, independent production systems. We then compare this with the RETE machine matching algorithm, and indicate how PROLOG programs may be implemented directly on DADO.