The search for green IT has inspired a wide spectrum of techniques for power management.
In a data center where computational power is provided by means of virtualised resources,
like virtual machines, the policy to allocate them on physical servers can strongly impact the
power consumption of the entire system. We propose a generalised stochastic Petri net
model to investigate the contribution to energy efficiency due to different allocation and
deallocation policies.

Nowadays, power consumption in IT infrastructures is a major area of concern for both
academia and industry. In data centers where computational power is provided by means of
virtualized resources, like virtual machines, the policy to allocate them on physical servers
can strongly impact the power consumption of the entire system. This affects data center
management, and proper estimation means can offer an important guidance to
administrators. We propose a lumped Petri net model to investigate the contribution to …