Space-Limited ranked query evaluation using adaptive pruning

  • Authors:
  • Nicholas Lester;Alistair Moffat;William Webber;Justin Zobel

  • Affiliations:
  • School of Computer Science and Information Technology, RMIT University, Victoria, Australia;Department of Computer Science and Software Engineering, The University of Melbourne, Victoria, Australia;Department of Computer Science and Software Engineering, The University of Melbourne, Victoria, Australia;School of Computer Science and Information Technology, RMIT University, Victoria, Australia

  • Venue:
  • WISE'05 Proceedings of the 6th international conference on Web Information Systems Engineering
  • Year:
  • 2005

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Abstract

Evaluation of ranked queries on large text collections can be costly in terms of processing time and memory space. Dynamic pruning techniques allow both costs to be reduced, at the potential risk of decreased retrieval effectiveness. In this paper we describe an improved query pruning mechanism that offers a more resilient tradeoff between query evaluation costs and retrieval effectiveness than do previous pruning approaches.