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https://issues.apache.org/jira/browse/SOLR-1875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12855576#action_12855576
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Yonik Seeley commented on SOLR-1875:
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OK, so the idea is pretty simple: reuse the existing algorithm for single
valued string fields that uses the FieldCache.
Count per-segment with a per-segment accumulator array, then merge all of the
counts at the end (probably with a priority queue - same method used in
MultiTermEnum). Seems like a good opportunity to introduce some threading and
do the per-segment counting in parallel.
> per-segment single valued string faceting
> -----------------------------------------
>
> Key: SOLR-1875
> URL: https://issues.apache.org/jira/browse/SOLR-1875
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 3.1
> Reporter: Yonik Seeley
> Assignee: Yonik Seeley
>
> A little stepping stone to NRT:
> Per-segment single-valued string faceting using the Lucene FieldCache.
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