为了实现基于数据流级的动态负载均衡，将 SDN 技术应用于云数据中心，提出一种基于 SDN 的云中心动态负载均衡方法。该方法利用 SDN技术在流和任务调度上灵活性的优势，通过 OpenFlow协议对服务节点流量及负载状况进行实时监测。当系统发生负载失衡时，控制器可全局化调配网络资源负载，通过更精确的动态修正，保证系统在长期运行时负载不会发生明显倾斜。仿真实验表明，该方法实现并保证负载在长时间不会发生倾斜，且能提高系统吞吐量。%In order to achieve cloud computing center dynamic load balancing based on data flow level,SDN technology is used in the cloud data center and a dynamic load balancing method of cloud center based on SDN is proposed.the method uses SDN technology in the current task scheduling flexibility and the advantages of real-time monitoring of the service node flow and load condition by OpenFlow,when the system load is imbalanced,the global allocation of network resources and the more accurate correction is done by the controller,so as to the load of the system is not obvious tilt in the long run.The simulation results show that the load will not tilt in a long period and the system throughput is improve.
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