中文摘要：

当前云计算应用中提供的虚拟集群尚不能自动的根据实际网络应用负载作动态调整，从而导致网络虚拟集群的资源利用与负载不适应，使得较多的计算资源空闲在集群中，产生能源浪费。针对上述问题，提出一种多目标优化的云计算虚拟集群动态调整方法，并给出虚拟集群动态调整框架。实验结果表明，该方法可以自动调整虚拟集群规模以适应网络应用负载，并能达到充分利用云计算资源和减少云计算能源消耗等优化目标。

英文摘要：

The virtual cluster provided in the cloud computing cannot be automatically adjusted based on the actual load in the network applications. So that makes the resource in the virtual cluster not suit to the load, and makes more idle computing resources in the cluster. For these reasons, a multi-objective optimization method of adaptive adjustment of the virtual cluster in cloud computing is proosed, and a framework of the adaptive adjustment is also provided. Experimental results show that the method can automatically adjust the virtual cluster size to fit the network application loads, and can take full advantage of the resources of cloud computing and save energy.