CLUES is an energy management system for High Performance Computing (HPC) Clusters and Cloud infrastructures. The main function of the system is to power off internal cluster nodes when they are not being used, and conversely to power them on when they are needed. CLUES system integrates with the cluster management middleware, such as a batch-queuing system or a cloud infrastructure management system, by means of different connectors.
CLUES also integrates with the physical infrastructure by means of different plug-ins, so that nodes can be powered on/off using the techniques which best suit each particular infrastructure (e.g. using wake-on-LAN, Intelligent Platform Management Interface (IPMI) or Power Device Units, PDU).
By using CLUES, power saving policies can be implemented in OpenNebula deployments. The system is completely integrated and the users would simply interact with OpenNebula normally, with the usual commands and virtual machine templates.