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Virtual Machines (VMs) may significantly improve the efficiency of data center infrastructure by sharing resources of physical servers. This benefit relies on an efficient VM placement scheme to minimize the number of required servers. Existing VM placement algorithms usually assume that VMs' demands for resources are deterministic and stable. However, for certain resources, such as network bandwidth, VMs' demands are bursty and time varying, and demonstrate stochastic nature. In this paper, the authors study efficient VM placement in data centers with multiple deterministic and stochastic resources. They formulate the Multidimensional Stochastic VM Placement (MSVP) problem, with the objective to minimize the number of required servers and at the same time satisfy a predefined resource availability guarantee.
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