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https://issues.apache.org/jira/browse/SOLR-2894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066383#comment-14066383
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Brett Lucey commented on SOLR-2894:
-----------------------------------

bq. ..so it sounds like you already eliminated the underlying risk .. correct?

Yes.  Since we know we'll only need to send refinements once, we added some 
logic to ensure we don't attempt to re-refine something we have already 
refined.  The bonus to this change is that it should offer a minor performance 
bump since we won't bother to re-check all of the refined values for further 
refinement.  (We've already asked all the shards about all of the candidates, 
so there won't be a need to repeat that.  We already know we have everything we 
need after we've refined once.)


> Implement distributed pivot faceting
> ------------------------------------
>
>                 Key: SOLR-2894
>                 URL: https://issues.apache.org/jira/browse/SOLR-2894
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Erik Hatcher
>            Assignee: Hoss Man
>             Fix For: 4.9, 5.0
>
>         Attachments: SOLR-2894-mincount-minification.patch, 
> SOLR-2894-reworked.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894.patch, SOLR-2894.patch, SOLR-2894.patch, 
> SOLR-2894_cloud_test.patch, dateToObject.patch, pivot_mincount_problem.sh
>
>
> Following up on SOLR-792, pivot faceting currently only supports 
> undistributed mode.  Distributed pivot faceting needs to be implemented.



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