基于集群节点间即时拷贝的会话同步技术研究

集群会话同步技术目前主要有如下几种：基于Cookie的会话同步，基于数据库的会话同步，基于分布式缓存的会话同步.在以上会话同步技术的基础上，提出了一种基于集群节点间即时拷贝的会话同步技术，将会话标识信息存放在客户端中，避免了在客户端中存放完整的会话信息，从而可防止用户身份信息暴露的安全隐患；同时，在客户端向服务器发送请求的过程中，只携带会话标识信息，而不是完整的会话信息，传输的数据量将大大减少，提高了客户端对服务器的访问效率；各集群节点间同步会话信息，不需要从数据库中获取会话信息，避免了频繁使用数据库带来的性能瓶颈；也不需要使用专门的会话缓存服务器，减低了开发和部署成本，并具有良好的应用前景.

Research on Session Synchronization Technology Based on Instant Copy of Cluster Node

Session synchronization technology mainly has the following several:session synchronization based on cookie, session synchronization based on database, session synchronization based on distributed cache. Based on the above session synchronization technologies, this paper gives a session synchronization technology based on instant copy of cluster node. This technology stores session id information in client to avoid store full session information in client, thus avoids the danger of user identity information exposure. Besides, in the process of sending a request to the server, only taking session id instead of complete session information. This greatly reduces transmitted data, so then improves the access efficiency of the client to server. Sychronizing session information between cluster nodes, there is no need to get session information from database which avoids performance bottlenecks on using database frequently. It also does not need specialized session cache servers, which cuts the cost of development and deployment. So, it has good application prospects.