The deployment of cloud computing is emerging day
by day. To reduce the maintenance and management cost
in comparison with in-house infrastructure, it is becoming
attractive and its use is growing rapidly. For supporting the
elasticity and scalability required by the customers, cloud
providers also rely on large and power-consuming data centers.
Energy-efficiency still remains a serious problem for providers,
though one of its commercial credentials is the reduction of
energy consumption at the client edge [5]. They have dealt
with energy consumption as well as provided SLA (Service
Level Agreement) and high performance expectations. Energyefficiency is still a challenging issue in the cloud model due
to the dynamicity of its components and flexibility of services
supported by virtualization where in the same time it has been
widely explored for similar architectures such as Cluster and
Grid Computing