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https://issues.apache.org/jira/browse/SOLR-8621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15136923#comment-15136923
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Christine Poerschke commented on SOLR-8621:
-------------------------------------------
re: {{SimpleMergePolicyFactory}} - I will revert the commit that made this
class non-abstract. How about {{factoryClass}} (or even {{factory}}) instead of
{{class}} element though? E.g.
{code}
<mergePolicyFactory class="UpgradeMergePolicyFactory">
<str name="wrapped.key">mergePolicy</str>
<str name="mergePolicy.factoryClass">TieredMergePolicyFactory</str>
<int name="mergePolicy.segmentsPerTier">42</int>
</mergePolicyFactory>
{code}
instead of
{code}
<mergePolicyFactory class="UpgradeMergePolicyFactory">
<str name="wrapped.key">mergePolicy</str>
<str name="mergePolicy.class">TieredMergePolicyFactory</str>
<int name="mergePolicy.segmentsPerTier">42</int>
</mergePolicyFactory>
{code}
> 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
>
> *<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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