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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8621) solrconfig.xml: deprecate/replace <mergePolicy> with <mergePolicyFactory>
Date Thu, 11 Feb 2016 22:27:18 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15143618#comment-15143618
] 

Shai Erera commented on SOLR-8621:
----------------------------------

[~cpoerschke] these look good, so +1 to merge to 5x. I agree that we're done w/ this issue
here. We can separately take care of SOLR-8674 and SOLR-8668. I enjoyed this collaboration,
thank you very much for such a fun and positive experience!

> solrconfig.xml: deprecate/replace <mergePolicy> with <mergePolicyFactory>
> -------------------------------------------------------------------------
>
>                 Key: SOLR-8621
>                 URL: https://issues.apache.org/jira/browse/SOLR-8621
>             Project: Solr
>          Issue Type: Task
>            Reporter: Christine Poerschke
>            Assignee: Christine Poerschke
>             Fix For: 5.5, master
>
>         Attachments: SOLR-8621-example_contrib_configs.patch, SOLR-8621-example_contrib_configs.patch,
SOLR-8621.patch, explicit-merge-auto-set.patch
>
>
> *<mergePolicyFactory> end-user benefits:*
> * Lucene's UpgradeIndexMergePolicy can be configured in Solr
> * (with SOLR-5730) Lucene's SortingMergePolicy can be configured in Solr
> * customisability: arbitrary merge policies including wrapping/nested merge policies
can be created and configured
> *(proposed) roadmap:*
> * solr 5.5 introduces <mergePolicyFactory> support
> * solr 5.5(\?) deprecates (but maintains) <mergePolicy> support
> * solr 6.0(\?) removes <mergePolicy> support 
> +work left-to-do summary:+
>  * Solr Reference Guide changes (directly in Confluence?)
>  * changes to remaining solrconfig.xml
>  ** solr/core/src/test-files/solr/collection1/conf - in SOLR-8674
>  ** solr/server/solr/configsets - master committed, branch_5x/branch_5_5 cherry-pick
to follow
>  * WrapperMergePolicyFactory.getMergePolicyInstance method  - master committed, branch_5x/branch_5_5
cherry-pick to follow
>  * RandomForceMergePolicyFactory - master committed, branch_5x/branch_5_5 cherry-pick
to follow
> +open question:+
>  * Do we want to error if luceneMatchVersion >= 5.5 and deprecated mergePolicy/mergeFactor/maxMergeDocs
are used? See [~hossman]'s comment on Feb 1st. The code as-is permits mergePolicy irrespective
of luceneMatchVersion, I think.



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