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https://issues.apache.org/jira/browse/LUCENE-5312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13808114#comment-13808114
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Robert Muir commented on LUCENE-5312:
-------------------------------------
Seems fine to me. As far as the future, I am worried about the API :)
I think we should decide if the central class should be DocComparator or Sorter
and adjust our APIs appropriately: e.g. with the patch its not easy to just
sort on a NDV field with block joins, but I feel like it should be.
But as a start, lets do this first and see if we can reorganize.
> Block-join-friendly index sorting
> ---------------------------------
>
> Key: LUCENE-5312
> URL: https://issues.apache.org/jira/browse/LUCENE-5312
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/other
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-5312.patch
>
>
> It could be useful to have a block-join-friendly sorter implementation that
> doesn't break index-time blocks:
> - blocks must not interleave,
> - parents must remain at the end of the blocks
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