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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4969) add sort comparator that uses OrdinalMap
Date Tue, 30 Apr 2013 11:10:16 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13645467#comment-13645467
] 

Michael McCandless commented on LUCENE-4969:
--------------------------------------------

+1
                
> add sort comparator that uses OrdinalMap
> ----------------------------------------
>
>                 Key: LUCENE-4969
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4969
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Robert Muir
>
> OrdinalMap (LUCENE-4795, SOLR-4490) lets you trade off reopen time for faster faceting:
it maps per-segment ordinals to a "global" space based on deviation from expected deltas.
> We could add a sort comparator to the sandbox or similar that uses this, especially in
the case you are using this for faceting anyway: you can then safely offload all terms bytes
to disk (DiskDV) and still have performant sorting and faceting.

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