Details
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New Feature
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Status: Open
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Major
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Resolution: Unresolved
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4.0
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None
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Fast IO when huge hierarchies are used
Description
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.