Abstract
The skyline-join operator, as an important variant of skylines, plays an important role in multi-criteria decision making problems. However, as the data scale increases, previous methods of skyline-join queries cannot be applied to new applications. Therefore, in this paper, it is the first attempt to propose a scalable method to process skyline-join queries in distributed databases. First, a tailored distributed framework is presented to facilitate the computation of skyline-join queries. Second, the distributed skyline-join query algorithm (DSJQ) is designed to process skyline-join queries. DSJQ contains two phases. In the first phase, two filtering strategies are used to filter out unpromising tuples from the original tables. The remaining tuples are transmitted to the corresponding data nodes according a partition function, which can guarantee that the tuples with the same join value are transferred to the same node. In the second phase, we design a scheduling plan based on rotations to calculate the final skyline-join result. The scheduling plan can ensure that calculations are equally assigned to all the data nodes, and the calculations on each data node can be processed in parallel without creating a bottleneck node. Finally, the effectiveness of DSJQ is evaluated through a series of experiments.
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Mei Bai received her BS and MS degrees in computer science and technology from the Northeastern University, China in 2009 and 2011, respectively. She is currently a PhD candidate in the Department of Computer Science, Northeastern University. Her research interests include sensory data management and uncertain data management.
Junchang Xin received the BS,MS, and PhD degrees in computer science and technology from the Northeastern University, China in 2002, 2005, and 2008, respectively. He is currently an associate professor in the Department of Computer Science, Northeastern University, China. His research interests include sensory data management, uncertain data management, cloud computing, and machine learning.
Guoren Wang received his BS, MS and PhD degrees from the Department of Computer Science, Northeastern University, China in 1988, 1991, and 1996, respectively. Currently, he is a professor in the Department of Computer Science, Northeastern University, China. His research interests are XML data management, query processing and optimization, bioinformatics, high-dimensional indexing, parallel database systems, and P2P data management.
Roger Zimmermann is an associate professor with the Department of Computer Science at the National University of Singapore (NUS), Singapore where he is also a deputy director with the Interactive and Digital Media Institute (IDMI) and a co-director with the Center of Social Media Innovations for Communities (COSMIC). He received his PhD from University of Southern California, USA in 1998. His research interests are distributed and peer-to-peer systems, collaborative environments, streaming media architectures, and mobile location-based services.
Xite Wang is a PhD candidate in College of Information Science & Engineering, Northeastern University, China, where he received his BS and MS degrees in 2009 and 2011, respectively. His research interests include cloud computing and big-data management.
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Bai, M., Xin, J., Wang, G. et al. Skyline-join query processing in distributed databases. Front. Comput. Sci. 10, 330–352 (2016). https://doi.org/10.1007/s11704-015-4534-y
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DOI: https://doi.org/10.1007/s11704-015-4534-y