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Posted to issues@lucene.apache.org by "Greg Miller (Jira)" <ji...@apache.org> on 2021/11/30 19:08:00 UTC

[jira] [Updated] (LUCENE-10250) Add hierarchical labels to SSDV facets

     [ https://issues.apache.org/jira/browse/LUCENE-10250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Greg Miller updated LUCENE-10250:
---------------------------------
    Component/s: modules/facet

> Add hierarchical labels to SSDV facets
> --------------------------------------
>
>                 Key: LUCENE-10250
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10250
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/facet
>            Reporter: Marc D'Mello
>            Priority: Major
>              Labels: discussion
>
> Hi all,
> I recently [added a new benchmarking task|https://github.com/mikemccand/luceneutil/issues/141] to {{luceneutil}} to count facets on a random word chosen from each document which would give us a very high cardinality facet benchmarking compared to the faceting benchmarks we already had. After being merged, [~mikemccand] pointed out some [interesting results|https://home.apache.org/~mikemccand/lucenebench/BrowseRandomLabelTaxoFacets.html] in the nightly benchmarks where the {{BrowseRandomLabelSSDVFacets}} task was much faster than the {{BrowseRandomLabelTaxoFacets}} task.
> I was thinking that using SSDV facets instead of taxonomy facets for our use case at Amazon Product Search could potentially lead to some increases in QPS and decreases in index size, but the issue is we use hierarchical labels, and as I understand it, SSDV faceting only supports a 2 level hierarchy as of today. This leads to my question of why is there a limitation like this on SSDV facets? Is hierarchical labels just a feature that hasn't been implemented in SSDV facets yet, or is there some more complex reason that we can't add hierarchical labels to SSDV facets?
> Thanks!



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