DBM*-Tree: an efficient metric access method

  • Authors:
  • Alexander Ocsa;Ernesto Cuadros-Vargas

  • Affiliations:
  • National University of San Agustin, Arequipa, Peru;Catholic University of San Pablo, Arequipa, Peru

  • Venue:
  • ACM-SE 45 Proceedings of the 45th annual southeast regional conference
  • Year:
  • 2007

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Abstract

In this paper we propose a new dynamic Metric Access Method (MAM) called DBM*-Tree, which uses precomputed distances to reduce the construction cost avoiding repeated calculus of distance. Making use of the pre-calculated distances cost of similarity queries are also reduced by taking various local representative objects in order to increment the pruning of irrelevant elements during the query. We also propose a new algorithm to select the suitable subtree in the insertion operation, which is an evolution of the previous methods. Empiric tests on real and synthetic data have shown evidence that DBM*-Tree requires 25 % less average distance computing than Density Based Metric - Tree (DBM-Tree) which is one of the most efficient and recent MAM found in the literature.