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Load shedding for multi-way stream joins based on arrival order patterns

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Abstract

We address the problem of load shedding for continuous multi-way join queries over multiple data streams. When the arrival rates of tuples from data streams exceed the system capacity, a load shedding algorithm drops some subset of input tuples to avoid system overloads. To decide which tuples to drop among the input tuples, most existing load shedding algorithms determine the priority of each input tuple based on the frequency or some historical statistics of its join attribute value, and then drop tuples with the lowest priority. However, those value-based algorithms cannot determine the priorities of tuples properly in environments where join attribute values are unique and each join attribute value occurs at most once in each data stream. In this paper, we propose a load shedding algorithm specifically designed for such environments. The proposed load shedding algorithm determines the priority of each tuple based on the order of streams in which its join attribute value appears, rather than its join attribute value itself. Consequently, the priorities of tuples can be determined effectively in environments where join attribute values are unique and do not repeat. The experimental results show that the proposed algorithm outperforms the existing algorithms in such environments in terms of effectiveness and efficiency.

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Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2010-0018865).

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Authors and Affiliations

  1. Command and Control Directorate, Systems Division, ROK Air Force, P.O. Box, 309, Sinjang-dong, Pyeongtaek-si, Gyeonggi-do, Republic of Korea

    Tae-Hyung Kwon

  2. Department of Computer Science, Sookmyung Women’s University, 52 Hyochangwon-gil, Yongsan-gu, Seoul, 140-742, Republic of Korea

    Ki Yong Lee

  3. Department of Computer Science, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-Dong, Yuseong-Gu, Daejeon, 305-701, Republic of Korea

    Myoung Ho Kim

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  1. Tae-Hyung Kwon
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  2. Ki Yong Lee
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Correspondence to Ki Yong Lee.

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Kwon, TH., Lee, K.Y. & Kim, M.H. Load shedding for multi-way stream joins based on arrival order patterns. J Intell Inf Syst 37, 245–265 (2011). https://doi.org/10.1007/s10844-010-0138-z

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  • DOI: https://doi.org/10.1007/s10844-010-0138-z

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