Energy Saving in Server Clusters

The widespread use of Web services from the last years has been increasing the energy consumed by datacenters. This is both an economical and environmental concern, and has motivated research on techniques to make server clusters more energy-efficient. This work presents simple and scalable policies to manage servers, while attending the soft real-time characteristics of the applications. The proposed control is able to service requests at the specified deadline 95% of the times, achieving an energy saving of more than 50% on some cases. All experiments were validated on a physical testbed.