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Posted to dev@lucene.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2015/05/07 19:59:02 UTC
[jira] [Commented] (SOLR-6968) add hyperloglog in statscomponent as
an approximate count
[ https://issues.apache.org/jira/browse/SOLR-6968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533090#comment-14533090 ]
ASF subversion and git services commented on SOLR-6968:
-------------------------------------------------------
Commit 1678245 from hossman@apache.org 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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