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https://issues.apache.org/jira/browse/SOLR-2894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14056463#comment-14056463
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Steve Molloy commented on SOLR-2894:
------------------------------------

Quick note on PivotFacetHelper's retrieve method. I understand the desire for 
good performance and more than agree with it. But with some entries being 
optional (statistics and qcount from SOLR-3583 and SOLR-4212 for instance), 
this causes the lookup to start after the proper position thus not finding 
entries that are there. I don't have a better solution than starting from 0 
currently, but I'm sure there's something that can be done to keep at least 
some of the speed improvement while still being able to support optional 
entries. Maybe force all optional to the end of the list, lookup by index for 
required ones (field, value, count) and starting at first optional spot for the 
rest?

> 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_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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