A simulation model of the MICRONET computer system during join processing

Abstract

The MICRONET computer system was specifically designed for processing distributed relational databases. This paper describes a simulation study of the queueing and resource utilization of this system during processing of a relational join operation. Problems associated with representing a computer network in a simulation model are presented. In our model, one set of simulation facilities can represent any node of interest in the network. The processing at each node involves competition for resources by the data bus and the join algorithm. This was represented by processes which were synchronized by Wait Event and Post Event primitives. An algorithm for interrupting a non-shareable resource (e.g. the cpu) was also developed. Results for various system loadings and database sizes are presented.