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Posted to dev@lucene.apache.org by "Toke Eskildsen (JIRA)" <ji...@apache.org> on 2011/07/14 12:52:59 UTC

[jira] [Commented] (SOLR-2412) Multipath hierarchical faceting

    [ https://issues.apache.org/jira/browse/SOLR-2412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13065175#comment-13065175 ] 

Toke Eskildsen commented on SOLR-2412:
--------------------------------------

LUCENE-2369 is updated to trunk@1145556 (2011-07-13). It contains the Solr patch too. Patch using the instructions at LUCENE-2369 and follow the instructions in solr/contrib/exposed/README.txt

> Multipath hierarchical faceting
> -------------------------------
>
>                 Key: SOLR-2412
>                 URL: https://issues.apache.org/jira/browse/SOLR-2412
>             Project: Solr
>          Issue Type: New Feature
>          Components: SearchComponents - other
>    Affects Versions: 4.0
>         Environment: Fast IO when huge hierarchies are used
>            Reporter: Toke Eskildsen
>              Labels: contrib, patch
>         Attachments: SOLR-2412.patch
>
>
> Hierarchical faceting with slow startup, low memory overhead and fast response. Distinguishing features as compared to SOLR-64 and SOLR-792 are
>   * Multiple paths per document
>   * Query-time analysis of the facet-field; no special requirements for indexing besides retaining separator characters in the terms used for faceting
>   * Optional custom sorting of tag values
>   * Recursive counting of references to tags at all levels of the output
> This is a shell around LUCENE-2369, making it work with the Solr API. The underlying principle is to reference terms by their ordinals and create an index wide documents to tags map, augmented with a compressed representation of hierarchical levels.

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