Abstract: Based on the Redis distributed memory database technology and its features of flexible scalability mechanism of distributed service nodes, data consistency and distributed transactions, this paper researched on the technical selection scheme which was suitable for the storage and query of favorite contacts data, solved the problems in the process of business data synchronization, such as the deviation, the high pressure of distributed cluster operation and maintenance, the poor scalability of service, the poor stability and the poor high availability. Through a series of comprehensive test scenarios, the overall performance, stability and scalability of the new architecture were verified,and the feasibility of distributed data processing technology under large concurrent access was further demonstrated.