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A Cache-Based Semi-Stream Join to deal with Unmatched Stream Data

  • M. Asif NaeemEmail author
  • Imran Sarwar Bajwa
  • Noreen Jamil
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9093)

Abstract

In Data Stream Management System (DSMS) semi-stream processing has become a popular area of research due to the high demand of applications (e.g. real-time data warehousing) for up-to-date information. One common operation in semi-stream processing is joining of incoming stream with disk-based master data. A recent algorithm called CACHEJOIN was proposed to implement this join operation. However, CACHEJOIN loads entire stream data into join module and consumes all its resources without eliminating those stream tuples which have no relevant tuples in disk-based master data. Due to this, the performance of CACHEJOIN remains suboptimal. In this paper we present a revised version of CACHEJOIN called Improved CACHEJOIN which removes this limitation. This reduces the processing cost for the new algorithm and as a consequence, the new algorithm outperforms existing CACHEJOIN significantly. In order to quantify the performance differences, we compare both algorithms using both synthetic and real datasets with a known skewed distribution. We also present the cost model for our new algorithm.

Keywords

Unmatched stream data Semi-Stream joins Performance optimization Data transformation 

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • M. Asif Naeem
    • 1
    Email author
  • Imran Sarwar Bajwa
    • 2
  • Noreen Jamil
    • 1
  1. 1.School of Computer and Mathematical SciencesAuckland University of TechnologyAucklandNew Zealand
  2. 2.Department of Computer Science & ITThe Islamia University of BahawalpurBahawalpurPakistan

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