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https://issues.apache.org/jira/browse/SOLR-792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928309#action_12928309
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Toke Eskildsen commented on SOLR-792:
-------------------------------------
As I read the code, the implementation performs a faceting call for each tag
that it encounters. I know the query is simple and that filters are used to
speed up the calls, but is still sounds awfully expensive to me. I think it can
be done without the recursive faceting calls by creating packed representations
(using ordinals) of the tags in the pivot fields for all documents and doing
faceting on those. However, if the current implementation works fine for larger
data sets, there's no reason to reworking it. Has anyone performed scalability
testing on the current implementation?
> Pivot (ie: Decision Tree) Faceting Component
> --------------------------------------------
>
> Key: SOLR-792
> URL: https://issues.apache.org/jira/browse/SOLR-792
> Project: Solr
> Issue Type: New Feature
> Reporter: Erik Hatcher
> Assignee: Ryan McKinley
> Priority: Minor
> Attachments: SOLR-792-as-helper-class.patch,
> SOLR-792-PivotFaceting.patch, SOLR-792-PivotFaceting.patch,
> SOLR-792-PivotFaceting.patch, SOLR-792-PivotFaceting.patch,
> SOLR-792-raw-type.patch, SOLR-792.patch, SOLR-792.patch, SOLR-792.patch,
> SOLR-792.patch, SOLR-792.patch, SOLR-792.patch
>
>
> A component to do multi-level faceting.
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