A Concise Queuing Model for Controller Performance in Software-Defined Networks
Bing Xiong, Xia Peng, Jinyuan Zhao · Journal of Computers · 2015
Software-defined Networking (SDN) is commonly seen as a promising way towards future Internet.Understanding the performance and limitation of its logically centralized controllers is a prerequisite of SDN deployments.For this end, this paper proposes a concise queuing model for SDN controller performance.We first investigate that the input of a SDN controller is a hybrid Poisson stream of packet-in messages.Then, we analyze the message processing of a SDN controller to achieve a concise queuing model M/M/1 for its performance, and further derive its performance parameters from queuing theory.Finally, our proposed model is evaluated by measuring a well-known controller with the benchmark Cbench.Experimental results indicate that our model is a better approximation of the controller performance than the existing ones.