[jira] [Resolved] (LUCENE-7561) Add back-compat indices for index sorting

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-7561?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-7561.
----------------------------------------
       Resolution: Fixed
    Fix Version/s: 6.4
                   master (7.0)

I added sorted indices to the BWC test here: https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;a=commit;h=774e31b6dd7184fb6d43fca83e32fcb46da32e20

> Add back-compat indices for index sorting
> -----------------------------------------
>
>                 Key: LUCENE-7561
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7561
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: master (7.0), 6.4
>
>
> Index time sorting is a powerful feature making searches that are "congruent" with the sort much faster, in exchange for slower indexing.  For some use cases this is a great tradeoff.
> We recently promoted the feature to core (LUCENE-6766) and made it very simple to use (you just call {{IndexWriterConfig.setIndexSort}}.  In LUCENE-7537 we are adding support for multi-valued fields.
> I think it's important we properly test backwards compatibility and from a quick look it looks like we have no sorted indices in {{TestBackwardsCompatibility}} ...



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