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Implementação e Análise de Desempenho de um Mecanismo Adaptativo para Tolerância a Falhas em Sistemas Distribuídos com QoS

Sérgio GorenderRaimundo J. A. MacêdoMatheus Cunha

Fault tolerance and adaptability are important issues for modern distributed systems. The capability of dynamically adapting to distinct run-time conditions is especially relevant for environments where negotiated QoS conditions cannot always be delivered between communicating processes. In this paper, we present an implementation of a framework for communication and resource management, using a network of LINUX workstations, which were equipped with a traffic control packet. We also implemented a fault tolerant mechanism, composed of a failure detector and a consensus protocol, which dynamic adapts to distinct QoS levels. The consensus protocol has the property that in the same consensus distinct processes can have different QoS, which characterize a hybrid fault tolerant model. We also measure the execution of the consensus, and present the result of these experiments.

http://www.lbd.dcc.ufmg.br:8080/colecoes/wtf/2004/001.pdf

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