一种基于SDN的数据中心负载均衡路由算法

A Load-balancing Routing Algorithm of Data-Center Based on SDN

随着数据中心网络对带宽和容错性等方面要求的不断提高,越来越多的数据中心开始采用胖树拓扑结构,胖树拓扑结构可以为任意两个不同POD的服务器提供多条等价路径,从而带来了高带宽和高容错性。然而,传统的路由算法并不能很好发挥胖树结构带来的性能提升,会造成很大的带宽浪费。因此,研究了一种基于SDN的数据中心负载均衡路由算法,依赖SDN控制器获取的数据中心网络全局信息,作出最优的负载均衡路由决策,从而降低网络拥塞的概率,并提高带宽利用率。

With the sustained growth of the requirement of data-center's network for bandwidth and fault tolerance,more and more data-centers begin to use fat-tree topology,which can provide multiple equivalent paths for two servers from different POD,which brings high bandwidth and high fault tolerance.However,the traditional routing algorithm does not give full play to the perfor⁃mance improvement brought by the fat-tree structure,which will cause a lot of bandwidth waste.Therefore,a load-balancing rout⁃ing algorithm of data-center based on SDN is studied,relying on the global information of data-center's network obtained by the SDN controller to make optimal load-balancing routing decisions.Therefor,it can reduce the probability of network congestion and improve bandwidth utilization.