| 一个基于移动数据库的动态缓存失效算法 |
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| 引用本文： | 甄雷,卢秉亮,梅义博,刘娜.一个基于移动数据库的动态缓存失效算法[J].沈阳航空工业学院学报,2010,27(2):49-51. |
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| 作者姓名： | 甄雷 卢秉亮 梅义博 刘娜 |
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| 作者单位： | 沈阳航空工业学院计算机学院,辽宁,沈阳,110136 |
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| 摘 要： | 基于失效报告的缓存失效技术解决了数据一致性问题,但其消耗了大量的无线网络带宽。为了解决这一问题,提出了一种自适应动态缓存失效（ADCIA）算法。该算法根据当前状态自适应动态调节服务器广播模式,由制定的时间阈值和请求更新的客户数量来选择广播模式。通过模拟实验,该方法能减少带宽消耗及降低查询延迟。
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| 关 键 词： | 移动数据库 缓存失效 失效报告 阈值 |
An algorithm of dynamic cache invalidation based on mobile database |
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| ZHEN Lei,LU Bing-liang,MEI Yi-bo,LIU Na.An algorithm of dynamic cache invalidation based on mobile database[J].Journal of Shenyang Institute of Aeronautical Engineering,2010,27(2):49-51. |
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| Authors: | ZHEN Lei LU Bing-liang MEI Yi-bo LIU Na |
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| Institution: | (College of Computer Science and Engineering,Shenyang Institute of Aeronautical Engineering,Liaoning Shenyang 110136) |
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| Abstract: | Cache invalidation techniques based on invalidation reports（IRs） is used solving data consistency problem,but it consumes a lot of wireless network bandwidth.To solve the problem,an improved algorithm named Adaptive Dynamic Cache Invalidation Algorithm（ADCIA） is proposed.This algorithm is of self-adaptive dynamic adjustment of the server broadcast mode based on the current state.The mode is selected based on thresholds specified for time and the number of clients requested updated objects.The simulation experiment has testified its superiority in reducing the communication bandwidth for query processing. |
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| Keywords: | Mobile database Cache invalidation Invalidation report Threshold |
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