Patent ID: 9363190
Filing Date: 2016-06-07
CPC Classification: G06F,H04L,Y02D

Claim Text:
1. A method of improving a utilization of physical resources and reducing energy consumption in a cloud data center, said method comprising: providing a plurality of virtual machines in said cloud data center; periodically reallocating, by a computing device, resources of said plurality of virtual machines according to a current resource demand of said plurality of virtual machines in order to minimize a number of active physical servers required to handle a workload of the physical servers, wherein said reallocating comprises: determining a Markov chain model, wherein said Markov chain comprises a plurality of states of said cloud data center, and wherein each of said plurality of states correspond to a range of utilization of said physical resources of said cloud data center; maximizing, by said computing device, a mean inter-migration time between virtual machine migrations under said quality of service requirement based on said Markov chain model, wherein said periodically reallocating resources is such that said mean inter-migration time between virtual machine migrations is maximized; and using, by said computing device for a non-stationary workload, a multisize sliding window workload estimation process to maximize said mean inter-migration time.