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https://issues.apache.org/jira/browse/SOLR-8621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15153085#comment-15153085
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Jack Krupansky commented on SOLR-8621:
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Shouldn't the index config reference page still list <mergePolicy> but with a
"Deprecated" notice? Ditto for <mergeFactor>.
The Upgrading Solr ref page does give an example of how to migrate from MP to
MPF (and for MF) - it would be nice to link to that from a deprecated notice on
the index config page.
See:
https://cwiki.apache.org/confluence/display/solr/IndexConfig+in+SolrConfig
https://cwiki.apache.org/confluence/display/solr/Upgrading+Solr
> 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
> * Lucene's SortingMergePolicy can be configured in Solr (with SOLR-5730)
> * customisability: arbitrary merge policies including wrapping/nested merge
> policies can be created and configured
> *roadmap:*
> * solr 5.5 introduces <mergePolicyFactory> support
> * solr 5.5 deprecates (but maintains) <mergePolicy> support
> * SOLR-8668 in solr 6.0(\?) will remove <mergePolicy> support
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