Distributed and Parallel Databases

, Volume 34, Issue 4, pp 535–566

Sliding window top-k dominating query processing over distributed data streams

Article

DOI: 10.1007/s10619-015-7187-9

Cite this article as:
Amagata, D., Hara, T. & Nishio, S. Distrib Parallel Databases (2016) 34: 535. doi:10.1007/s10619-015-7187-9
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Abstract

Preference query processing is important for a wide range of applications involving distributed databases, such as network monitoring, web-based systems, and market analysis. In such applications, data objects are generated frequently and massively, which presents an important and challenging problem of continuous query processing over distributed data stream environments. A top-k dominating query, which has been receiving much research attention recently, returns the k data objects that dominate the highest number of data objects in a given dataset, and due to its dominance-based ranking function, we can easily obtain superior data objects. An emerging requirement in distributed stream environments is an efficient technique for continuously monitoring top-k dominating data objects. Despite of this fact, no study has addressed this problem. In this paper, therefore, we address the problem of continuous top-k dominating query processing over distributed data stream environments. We present two algorithms that monitor the exact top-k dominating data and efficiently eliminate unqualified data objects for the result, which reduces both communication and computation costs. In addition to these algorithms, we present an approximate algorithm that further reduces both communication and computation costs. Extensive experiments on both synthetic and real data have demonstrated the efficiency and scalability of our algorithms.

Keywords

Top-k dominating queriesMulti-dimensional dataDistributed data streams

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Multimedia Engineering, Graduate School of Information Science and TechnologyOsaka UniversitySuitaJapan