Carlo Fragni,  Luís Henrique M. K. Costa,  Otto Carlos M. B. Duarte. 

Cluster-based software routers are a practical approach to providethe flexibility of software routers and overcome their scalability issue. Thiswork proposes ECO-ALOC, an energy-efficient resource allocation mechanismfor cluster-based software routers. ECO-ALOC has two modules: the first moduleprovides fine-grained energy consumption control by switching CPU operationfrequencies, while the second module provides long-term power savingsby using virtual router migration to consolidate the load and shut idle serversdown inside the cluster. Simulations using real traffic traces show that ECOALOCprovides power savings of up to 93%.

http://www.lbd.dcc.ufmg.br/colecoes/sbrc/2011/003.pdf

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