移动云环境中基于Agent的缓存一致性维护策略

An Agent-based Cache Consistence Maintenance Strategy in Mobile Cloud Environment

带有时间戳的广播算法是移动设备缓存一致性维护的常用算法,针对传统算法中存在的服务端"写延迟"及断接操作等性能问题,结合移动云技术、Agent技术及缓存技术,搭建三层结构移动云平台,并在中间层建立数据缓存,利用中间层协调客户端与服务端关系,通过移动代理来维护"双缓存"一致性,同时给出算法实现。仿真实验表明,该策略能够有效解决"写延迟"及终端断接操作等问题,并提高客户请求响应速度、减少网络通信开销。

Broadcasting timestamps strategy is widely used in consistent maintenance of mobile cache. Aiming at the problems of write latencies and disconnection operation in the traditional strategy, the mobile cloud computing is combined with agent and caching technique, and the three-layer structure in mobile cloud platform, and the data caches are constructed in middle layer. The server is coordinated with the client by the middle layer. Meanwhile, the implement strategies are given. The simulation results show that the problems of write latencies and disconnection operation can be solved. The response speed of client request is improved, and network transfer cost is decreased.