基于自适应数据广播的缓存一致性维护

为了提高移动环境中缓存数据的效率,在分析现有技术的基础上,提出了基于自适应数据广播的缓存一致性维护.将数据的访问形式分为共享和独占两种,根据数据访问形式以及数据的更新频率,采用定时、计数以及数据状态等三种方法,动态地调整服务器广播更新数据的频率和内容.通过数据库中事务的可串行化操作,对该方法的正确性进行了理论证明,并通过具体的系统验证了其效率.该方法可以在各种无线网络环境中应用,为无线应用提供数据缓存.

Cache Consistency Maintenance Based on Adaptive Broadcast

In order to improve the efficiency of cache data in mobile environment, characteristics of related work are analyzed, and a method is proposed to maintain the cache consistency based on adaptive broadcast. The data access pattern is divided into exclusive and sharing, according to the pattern of access and update frequency of the data, Three ways are adopted, i.e.the period, update counter and data state to dynamically adjust the frequency and content of data broadcast. The correctness of this method based on the theory of transaction serialization in database is testified that verifies the efficiency through experiment. The method can be applied in various wireless networks for their data cache.