| 一类数据流连续查询的降载策略研究 |
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| 引用本文： | 王金栋,周良,张磊,丁秋林.一类数据流连续查询的降载策略研究[J].武汉大学学报(工学版),2005,38(6):133-137. |
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| 作者姓名： | 王金栋 周良 张磊 丁秋林 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院,江苏,南京210016 |
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| 基金项目： | 国防重大基础预研项目(S0500A001)资助 |
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| 摘 要： | 在数据流系统中,输入数据流速增大会产生连续查询过载问题.针对输入数据流存在重要性差别情况,对过载引发的降载问题进行了专门研究.基于数据流和连续查询网络的特点,给出了问题的定义及约束条件,分析了现有的降载方法,提出了关于不等权输入数据流连续查询的降载策略.理论分析和试验结果表明了策略的有效性.
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| 关 键 词： | 数据流 连续查询 降载 |
| 文章编号： | 1671-8844(2005)06-133-05 |
| 修稿时间： | 2005年4月28日 |
Load shedding for continuous query on different important input streams |
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| WANG Jin-dong,ZHOU Liang,ZHANG Lei,DING Qiu-lin.Load shedding for continuous query on different important input streams[J].Engineering Journal of Wuhan University,2005,38(6):133-137. |
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| Authors: | WANG Jin-dong ZHOU Liang ZHANG Lei DING Qiu-lin |
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| Abstract: | In data stream rates systems,over load problem may be caused by the burst of input data rate.The load shedding problem aroused by over loading is studied on the condition that there is difference(about) importance of input streams.Based on the characteristics of data streams and continuous query networks,the definition and restrictions of the problem are given;and load shedding methods in being are analyzed.Subsequently a load shedding strategy is proposed for continuous query about input streams with different weights.The theoretical analysis and numerical experiment show the efficiency of this strategy. |
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| Keywords: | data stream continuous query load shedding |
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