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https://issues.apache.org/jira/browse/SOLR-8621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15138669#comment-15138669
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Christine Poerschke commented on SOLR-8621:
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[~elyograg] - It's the master-solr-8621 i.e. working branch
https://git1-us-west.apache.org/repos/asf?p=lucene-solr.git;a=commitdiff;h=8ec2c844
that you refer to I think?
bq. ... maxMergeAtOnce and segmentsPerTier value of 42 ...
My intention was to communicate that users with an existing {{<mergeFactor>}}
or {{<maxMergeDocs>}} setting likely need to add an equivalent element to the
{{<mergePolicyFactory>}} element. Using 42 as an example value was clearly
distracting, I will use ?? instead then.
bq. ... maxMergeAtOnce ... maxMergeAtOnceExplicit ...
Interesting point about the alignment or otherwise of these values. Yes, that
sounds worthy of its own LUCENE issue.
> 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
> Attachments: 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-in-progress git branch:+
> [master-solr-8621|https://github.com/apache/lucene-solr/tree/master-solr-8621]
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