华中科技大学学报（自然科学版）2017，Vol.45Issue(5)：1-5,5.DOI:10.13245/j.hust.170501
基于访问相关性的空间数据副本控制策略
Replication strategy for spatial data based on access correlation
摘要
Abstract
Due to the limited high-speed caching space and the massive dataset, replication strategy based solely on data′s popularities cannot work when users′ access behaviors change suddenly, a comprehensive replication strategy used both data′s popularities and data′ relationships to select replicas was proposed.First, hotspot data were selected based on their popularities to reduce the size of data and then reduce computational overhead.Then, access correlations were computed based on their relationships.Finally, some data could be selected as replicas and stored into high-speed caching system according to their access correlations with the data being requested, so as to prepare the next data for users in advance and to reduce average request response time.Experimental results show that the proposed comprehensive replication strategy can achieve a lower average request response time than some other algorithms by about 5.9% ~ 29.9%.关键词
空间数据管理/副本技术/数据挖掘/相关性模型/地理信息系统Key words
spatial data management/replica techniques/data mining/correlation model/geographic information system分类
信息技术与安全科学引用本文复制引用
潘少明,种衍文,李红,谭喜成..基于访问相关性的空间数据副本控制策略[J].华中科技大学学报（自然科学版）,2017,45(5):1-5,5.基金项目
国家自然科学基金资助项目(41671382, 41271398,61572372,51277167) （41671382, 41271398,61572372,51277167）
武汉大学测绘遥感信息工程国家重点实验室专项科研经费资助项目 （）
上海航天科技创新基金资助项目(SAST201425,SAST2016006). （SAST201425,SAST2016006）
