Since its Phd in 2006 in Nantes, he is working on autonomous systems to place VMs in hosting platforms according to various placement constraints. His results are available through the open source VM manager named Entropy, and its VM placement algorithm named BtrPlace. Jean-Marc Menaud is an associate professor at the Ecole des Mines de Nantes, France, in the Ascola EMN/INRIA, LINA team. From 2006, he is working on Entropy then btrCloud, a software solution to manage virtual machine in cluster environnement. More precisely, he is working on optimisation system to reduce energy consumption in large scale distributed system. Marc Lacoste