PERFORMANCE OPTIMIZATION OF A DISTRIBUTED SYSTEM IN A MODULAR PROGRAM ENVIRONMENT

Abstract

Distributed systems are becoming increasingly popular now—a—days because they provide increased per-- formance, reliability, availability and greater through-put compared to centralized systems. + program submitted to a distributed system is divided into a number of units called modules. This subdivision is made in such a manner that the modules will have least intercommunication with one another. Then the difficulty lies in proper allocation of these modules to facilitate execution of different modules on different processors, thereby reducing the total execution time of this modular program. The dissertation work carried out aims at 'the study of the problems associated with the assignment of modules to the processors. The main problams encountered are the degradation in performance due to Inter Processor Commu-nication, and the balancingg of load among different pro-cessors of the system. Interprocessor communication is required when a module residing on one processor communi-cates.with a module on another processor. Load balancing is achieved when, after module allocation, the execution costs of the sot of modules assigned to each processor are - almost equal.