One of the most attractive features that computing clouds can offer is that the data center maintenance cost can be reduced by consolidating the workload generated by the virtual machines (VMs) into a few powerful physical servers. In this paper, the problem of maximally consolidating heterogeneous virtual machines into servers while protecting the service level agreement of each virtual machine is investigated. A generic and robust VM workload consolidation framework is proposed. The proposed framework achieves several attractive properties like low maintenance cost, low algorithm complexity, adjustable resource provisioning aggressiveness, and good scalability.
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