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Posted to dev@lucene.apache.org by "Toke Eskildsen (JIRA)" <ji...@apache.org> on 2014/11/19 00:25:36 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=14217040#comment-14217040 ]
Toke Eskildsen commented on SOLR-2412:
--------------------------------------
Frankly, I am not sure it ever will. SOLR-2412 is huge and it is a completely separate facet implementation, of which Solr already has too many. We are not currently using it at my organization as we don't have the need for hierarchical faceting and since SOLR-5894 gives us a similar speed-boost when using multiple facets.
I hope to add the hierarchical capabilities as overlay to the existing Solr facet code at some point, but I really cannot say when or if that will work out.
Sorry about that and apologies for taking so long to come to that realization.
> 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, SOLR-2412.patch, SOLR-2412.patch, SOLR-2412.patch, SOLR-2412.patch, 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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