A Broker Architecture for Object-Oriented Master/Slave Computing in a Hierarchical Grid System

Even though many simulation frameworks for predicting performance in Grid systems have been implemented, real Grid middleware platforms lack of effective resource managers able to help them to dynamically make a decision about task placement. This paper proposes a broker architecture and its implementation for a hierarchical Grid system. The broker. whose logic is based on an economy-driven model, is able both to transparently split a sequential object-oriented application into tasks, according to the master/slave computing model, and to automatically distribute slave tasks to a set of computational resources selected so as to execute the application satisfying the QoS specified by the user. The goal is achieved by designing the broker with three patterns: Grid Broker, Reflection and Master/Slave.