Load balancing scheme for data center based on SDN

In data center, because of the large amount of user access, it usually takes the deployment of many server cluster to meet the needs of the vast numbers of users' access. How to decide a scheme to share the traffic of users to different servers becomes an important indicator of the overall quality of service in this scenario. In order to reduce costs and provide high-quality and reliable service, the load balancing technology is usually used in enterprises. At present, the industry generally uses LVS and other open source software or commercial load balancing device based on traditional network to complete this feature. However, due to the high cost of existing load balancing equipment, as well as the inherent shortcomings of traditional Internet, these solutions are lack of flexibility, and user's experience is not friendly enough. This paper proposed a load balancing scheme in data center based on SDN, that can implement an efficient dynamic scheduling according to the server status, using the feature of programmability in OpenFlow network, to balance different applications and complete the rational use of data center server cluster in a scenario that user request changes drastically. We also realized an equilibrium model for different applications. In addition, this paper also uses the Mininet network simulation tool to design the experiment scene, and completes the verification of the scheme.