A Real-Time Scheduling Strategy Based on Priority in Data Stream System

被引：0
|
作者：
Wang, Yan [1 ]
Xuan, Weihong [1 ]
Li, Wei [1 ]
Song, Baoyan [1 ]
Li, Xiaoguang [1 ]
机构：
[1] Liaoning Univ, Sch Informat Sci & Technol, Shenyang 110036, Liaoning, Peoples R China
来源：
HIS 2009: 2009 NINTH INTERNATIONAL CONFERENCE ON HYBRID INTELLIGENT SYSTEMS, VOL 3, PROCEEDINGS | 2009年
关键词：
data stream; query priority; scheduling strategy; priority tree; ALGORITHMS;
D O I：
10.1109/HIS.2009.269
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
In this paper, some concepts of real-time system (e.g., dealine, slack and criticalness) are introduced into some high-critical specific applications of Data Stream Management System (DSMS). In light of the features of continuous queries in DSMS, they are given new meaning. According to these concepts, a real-time scheduling strategy based on priority is proposed. In this strategy, the earlier dealine is, the shorter slack is and the higher criticalness is, the higher priopirty of a query is. Meanwhile, a structure of priority tree is presented in order to realize the unique execution sequence of queries based on their priorities. The experimental results show that the Hit Value Ratio (HVR) is improved greatly by applying this strategy, and the successful possibility of continuous query scheduling is improved as well.
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页码：268 / 272
页数：5
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