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  TopX 2.0 at the INEX 2009 Ad-Hoc and Efficiency Tracks

Theobald, M., Aji, A., & Schenkel, R. (2009). TopX 2.0 at the INEX 2009 Ad-Hoc and Efficiency Tracks. In S. Geva, J. Kamps, & A. Trotman (Eds.), INEX 2009 Workshop Preproceedings (pp. 198-208). Berlin: Springer.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-195F-F Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-3605-C
Genre: Conference Paper
Latex : Top{X} 2.0 at the {INEX} 2009 Ad-Hoc and Efficiency Tracks

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 Creators:
Theobald, Martin1, Author           
Aji, Ablimit1, Author           
Schenkel, Ralf1, Author           
Affiliations:
1Databases and Information Systems, MPI for Informatics, Max Planck Society, ou_24018              

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 Abstract: This paper presents the results of our INEX 2009 Ad-hoc and Efficiency track experiments. While our scoring model remained almost unchanged in comparison to previous years, we focused on a complete redesign of our XML indexing component with respect to the increased need for scalability that came with the new 2009 INEX Wikipedia collection, which is about 10 times larger than the previous INEX collection. TopX now supports a CAS-specific distributed index structure, with a completely {\em parallel} execution of all indexing steps, including parsing, sampling of term statistics for our element-specific BM25 ranking model, as well as sorting and compressing the index lists for our final inverted block-index. Overall, TopX ranked among the top 3 systems in both the Ad-hoc and Efficiency tracks, with a maximum value of 0.61 for iP[0.01] and 0.29 for MAiP in focused retrieval mode at the Ad-hoc track. Our fastest runs achieved an average runtime of 72 ms per CO query, and 235 ms per CAS query at the Efficiency track, respectively.

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Language(s): eng - English
 Dates: 2009
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 520384
Other: Local-ID: C1256DBF005F876D-45677CD49BD1482EC1257674003346B4-topx-inex-2009
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Title: 2009 INEX Workshop Preproceedings
Place of Event: Brisbane, Australia
Start-/End Date: 2009-12-07 - 2009-12-10

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Title: INEX 2009 Workshop Preproceedings
Source Genre: Proceedings
 Creator(s):
Geva, Shlomo1, Editor
Kamps, Jaap1, Editor
Trotman, Andrew1, Editor
Affiliations:
1 External Organizations, ou_persistent22            
Publ. Info: Berlin : Springer
Pages: - Volume / Issue: 6203 Sequence Number: - Start / End Page: 198 - 208 Identifier: -