| 时态数据的变粒度分段存储策略及其效益分析S |
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| 引用本文： | 唐常杰,于中华,游志胜,张天庆,相利民. 时态数据的变粒度分段存储策略及其效益分析S[J]. 软件学报, 1999, 10(10): 11 |
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| 作者姓名： | 唐常杰 于中华 游志胜 张天庆 相利民 |
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| 作者单位： | 四川大学计算机系,成都,610064 |
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| 基金项目： | 中国科学院资助项目，教育部留学回国人员科研启动基金 |
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| 摘 要： | 根据时态数据库用户对数据厚今薄古的需求特点,该文提出变粒度分段存储技术,将一个对象的历史分为3个时期,分介质、变粒度存储.文章讨论了分段存储的特殊数据结构、时代转移算法和压缩采样算法.基于微机实用参数的定量分析表明,这一技术将时态存储密度和时态查询速度提高了一个数量级.
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| 关 键 词： | 时态数据库 分段存储 时代转移算法 压缩采样 时态存储密度 |
| 修稿时间： | 1998-07-14 |
Segmented Storage with various Chronons in Temporal Databases and Efficiency Analysis |
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| TANG Chang-jie,YU Zhong-hua,YOU Zhi-sheng,ZHANG Tian-qing,XIANG Li-min. Segmented Storage with various Chronons in Temporal Databases and Efficiency Analysis[J]. Journal of Software, 1999, 10(10): 11 |
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| Authors: | TANG Chang-jie YU Zhong-hua YOU Zhi-sheng ZHANG Tian-qing XIANG Li-min |
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| Abstract: | Based onthe usage frequency of the data in temporal database, the storage method with threehistorical segments is proposed in this paper. The object history is divided into threesegments, and stored in different media with various chronons. The special data structurefor segmented storage is discussed, the age transfer algorithm and the compress samplingalgorithm are proposed. The performance study shows that the time and space efficiency arepromoted one magnitudes. |
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