Threshold-based declustering

  • Authors:
  • Ali Şaman Tosun

  • Affiliations:
  • Department of Computer Science, University of Texas at San Antonio, 6900 North Loop, 1604 West, San Antonio, TX 78249, USA

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2007

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Abstract

Declustering techniques reduce query response time through parallel I/O by distributing data among multiple devices. Except for a few cases it is not possible to find declustering schemes that are optimal for all spatial range queries. As a result of this, most of the research on declustering has focused on finding schemes with low worst case additive error. However, additive error based schemes have many limitations including lack of progressive guarantees and existence of small non-optimal queries. In this paper, we take a different approach and propose threshold-based declustering. We investigate the threshold k such that all spatial range queries with =