Distribution-Aware Compressed Full-Text Indexes

11 years 3 months ago
Distribution-Aware Compressed Full-Text Indexes
Abstract. In this paper we address the problem of building a compressed self-index that, given a distribution for the pattern queries and a bound on the space occupancy, minimizes the expected query-time within that index-space bound. We solve this problem by exploiting a reduction to the problem of finding a minimum weight K-link path in a particular Directed Acyclic Graph. Interestingly enough, our solution is independent of the underlying compressed index in use. Our experiments compare this optimal strategy with several other standard approaches, showing its effectiveness in practice.
Paolo Ferragina, Jouni Sirén, Rossano Ventu
Added 20 Dec 2011
Updated 20 Dec 2011
Type Journal
Year 2011
Where ESA
Authors Paolo Ferragina, Jouni Sirén, Rossano Venturini
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