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From "Toke Eskildsen (JIRA)" <>
Subject [jira] [Updated] (SOLR-2412) Multipath hierarchical faceting
Date Thu, 11 Oct 2012 07:15:03 GMT


Toke Eskildsen updated SOLR-2412:

    Attachment: SOLR-2412.patch

Updated patch to work with Solr 4 Beta. Apply it to a checkout from and follow the README.txt
in solr/contrib/exposed/

The patch does not yet work with later Solr 4 versions, due to API changes.
> Multipath hierarchical faceting
> -------------------------------
>                 Key: SOLR-2412
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: SearchComponents - other
>    Affects Versions: 4.0-ALPHA
>         Environment: Fast IO when huge hierarchies are used
>            Reporter: Toke Eskildsen
>              Labels: contrib, patch
>         Attachments: SOLR-2412.patch, 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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