移动环境下一种缓存管理策略

摘要

移动计算环境中带宽具有非对称性，并且移动设备资源有限，传统的缓存管理策略需要占用大量的设备计算资源和网络带宽，有效的缓存管理技术能够极大提高移动计算的性能。对此提出一系列的针对移动计算的缓存管理策略。首先根据用户访问频率建立对应的具有生命周期的数据项缓存，然后使用自适应一致性维护策略维护缓存的一致性。通过实验分析，提出的管理策略能够很好地降低带宽占用，并且有效地减少对移动客户端的资源需求。%Because of the asymmetric bandwidth in mobile computing environment and the limited resources in mobile devices, traditional cache management strategies need to take up a lot of computing resources of the device and network bandwidth.An effective cache management technology can greatly improves the performance of mobile computation.For this, we propose a series of cache management strategies targeted at mobile computation.Firstly, the corresponding data items cache with lifecycle is established according to user’s access frequency, then the adaptive consistency maintenance strategy is used to maintain the consistency of cache.By analysing the experimental results, the proposed management strategy can well reduce the bandwidth usage and can effectively reduce the resource requirements on mobile clients as well.