Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/4055
Título: Time-bounded distributed QoS-aware service configuration in heterogeneous cooperative environments
Autor: Nogueira, Luis
Pinho, Luis Miguel
Palavras-chave: Distributed systems
Dynamic real-time systems
Quality of service
Anytime algorithms
Data: 2006
Editora: Elsevier
Relatório da Série N.º: Journal of Parallel and Distributed Computing; Vol. 69, Issue 6
Resumo: The scarcity and diversity of resources among the devices of heterogeneous computing environments may affect their ability to perform services with specific Quality of Service constraints, particularly in dynamic distributed environments where the characteristics of the computational load cannot always be predicted in advance. Our work addresses this problem by allowing resource constrained devices to cooperate with more powerful neighbour nodes, opportunistically taking advantage of global distributed resources and processing power. Rather than assuming that the dynamic configuration of this cooperative service executes until it computes its optimal output, the paper proposes an anytime approach that has the ability to tradeoff deliberation time for the quality of the solution. Extensive simulations demonstrate that the proposed anytime algorithms are able to quickly find a good initial solution and effectively optimise the rate at which the quality of the current solution improves at each iteration, with an overhead that can be considered negligible.
Peer review: yes
URI: http://hdl.handle.net/10400.22/4055
ISSN: 0743-7315
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0743731509000410
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