Design of Distributed Cache System in SDN Controller Cluster Based on Topology Partition

With the rapid development of cloud computing and virtualization technology, the scale of data center is expanding constantly. SDN controller is responsible for managing data center equipment, so the scale of controller cluster is expanding constantly. In this paper, an SDN multi-controller deployment method based on topology partition is proposed. By analyzing the consistent hashing algorithm, a data distribution mode based on the consistent hashing algorithm of virtual nodes is designed, and a set of communication protocols is developed under this data distribution mode to cache the communication between nodes. Experiments show that the proposed optimization and improvement scheme can effectively improve the performance of cache system and solve the problems of scalability, data inconsistency, serialization and cache distribution.