Accession Number : ADA116983

Title :   Performance of Distributed and Decentralized Control Models for Fully Distributed Processing Systems - Initial Simulation Studies.

Descriptive Note : Final technical rept. 1 Jul 80-30 Jun 81,


Personal Author(s) : Enslow,Philip H , Jr ; Saponas,Timothy G

PDF Url : ADA116983

Report Date : May 1982

Pagination or Media Count : 103

Abstract : An essential component of a Fully Distributed Processing System (FDPS) is the distributed and decentralized control. This component unifies the management of the resources of the FDPS and provides system transparency to the user. In a previous study, the problems of distributed and decentralized control were analyzed resulting in the specification of several control models. This study continues that work by further specifying the control models defined in the first report and comparing the performance of these models in various environments. This performance analysis was accomplished by means of simulation experiments. The results of the experiments indicate that the control message traffic generated by the distributed and decentralized control is much less than expected and probably does not present a barrier to the implementation of FDPS's. Comparison of the results of the simulation of a uniprocessor and that of an FDPS indicate that little or no loss of performance is experienced by the FDPS. An important limitation of these initial performance studies is the fact that user traffic was not included in this series of tests. (Author)

Descriptors :   *Distributed data processing, *Control simulators, Performance tests, Computerized simulation, Communications traffic, Decentralization, Communications networks, User needs, Specifications, Comparison, Multimode, Interfaces, Interactions, Transparence

Subject Categories : Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE