面向SDN数据中心网络的路径资源管理节能机制研究

SDN Data Center Networks Oriented Energy Saving Mechanism Research Based on the Path Resource Management

随着数据中心规模的不断扩大,能耗问题已经成为制约其发展的瓶颈之一.因此,数据中心网络节能成为研究领域的一个重要方向,也产生了很多的研究成果.其中相当一部分方法是从寻找最小能耗路径入手,却往往陷入NPC或NP难问题的窘境.为了避免此类情况,从Fat Tree构架的网络拓扑特点入手,提出"独立路径集"的概念,并以路径资源管理的理念对数据中心网络节能机制展开研究.利用软件定义网络对网络节点的监控能力,着眼全局控制,根据实时流量情况动态地调整数据中心网络资源配置.在满足当前流量需求的同时,关闭或休眠闲置的交换机,从而达到节能的目的.通过仿真实验及相关分析,证明该方法具备可行性和可操作性,为进一步拓展研究打下了基础.

With the expansion of the scale of the data center, the problem of energy consumption has become one of the bottleneck re- stricting its development. Therefore,data center networks energy saving has become an important direction in this field of research,and a lot of achievements have been produced. Among the achievements,quite a number of ways based on finding the minimum energy con- sumption paths always have themselves in a situation of NPC or NP-hard problems. In order to avoid this kind of situation, based on net- work topology characteristics of FatTree framework, we present the concept of ＂the independent path sets＂ ,and we have our energy-sav- ing mechanism study of data center networks with the path resource management concept. The mechanism has taken advantage of the a- bility to monitor the network elements of the software defined networks,and dynamically coordinate the global data center network re- sources according to the real-time traffic matrix. It is ensured that the needs of bandwidth of the current flows have been met,and then shut down or dormant the spare switches so as to achieve the goal of energy saving. The simulation experiments and correlation analysis have proved that this mechanism has the feasibility and the operability,and it has laided the foundation for the further research.