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https://issues.apache.org/jira/browse/SOLR-6968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533090#comment-14533090
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ASF subversion and git services commented on SOLR-6968:
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Commit 1678245 from [email protected] in branch 'dev/trunk'
[ https://svn.apache.org/r1678245 ]
SOLR-6968: New 'cardinality' option for stats.field, uses HyperLogLog to
efficiently estimate the cardinality of a field w/bounded RAM
> add hyperloglog in statscomponent as an approximate count
> ---------------------------------------------------------
>
> Key: SOLR-6968
> URL: https://issues.apache.org/jira/browse/SOLR-6968
> Project: Solr
> Issue Type: Sub-task
> Reporter: Hoss Man
> Attachments: SOLR-6968.patch, SOLR-6968.patch, SOLR-6968.patch,
> SOLR-6968.patch, SOLR-6968.patch, SOLR-6968.patch
>
>
> stats component currently supports "calcDistinct" but it's terribly
> inefficient -- especially in distib mode.
> we should add support for using hyperloglog to compute an approximate count
> of distinct values (using localparams via SOLR-6349 to control the precision
> of the approximation)
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