Power-saving dynamic allocati on strategy for clouding server

Energy cost is the fastest-rising expense for today´s cloud data centers. Power consumption is one of the top concerns for managers of cloud data centers. In such strong demands for cloud services, cloud data center is growing but lead to a lot of concerns about energy consumption. This work proposes a method to control cloud data center power consumption by Out-of-Band server hardware management tool to dynamic reallocate virtual machines and on-and-off physical server machines. The threshold defined by status of system power consumption and/or major factors which data center manager concerned. The method need not involve end user´s operating system that won´t cause concern of information security. From experiment result, the proposed method can reduce maximum 61.5% on power consumption which is compared with load-balancing method.