数据预取是有效提高访问速度和减少数据访问时间的一个可行办法。本文主要考虑mc访问ldd可能性概率以及每一种数据能提供多少有效查询信息,设计出一个预取价值选择函数,在候选集中找到预取数据,只要这些数据出现在广播信道,就预取到本地缓存。通过实验比较,cdp策略比ddp、dhp策略更有效的提高了缓存命中率。
参考文献:
[1]李国徽,杨兵,陈辉,等.移动环境下支持实时事务处理的数据预取[j].计算机学报,2008,31(10):1841-1847.
[2]yin l,cao g.adaptive power-aware prefetch in wirelesa networks[j].ieee transactions wire1ess communications,2004.3(5):1648-1658.
[3]jiang z,kleinrock l.web prefetching in a mobile environment[j].ieee personal communications,1998,5(5):25-34.
[4]persone v d n,grassi v,morlupi a.modeling and evaluation of prefetching policies for context-aware information services[c].proceedings of the 4th annual international conference on mobile computing and networking,1998:55-65.
[5]zheng b,xu j,lee d l.cache invalidation and replacement strategies for location-dependent data in mobile environments[j].ieee transactions on computers,2002,51(10):1141-1153.
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