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https://issues.apache.org/jira/browse/SOLR-5730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118799#comment-15118799
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Shai Erera commented on SOLR-5730:
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Rethinking my proposal, I'm not sure chaining merge policies is the right
approach. What does it mean if I chain LogMergePolicy and TieredMergePolicy?
How about if we introduce a MergePolicyPlugin/Factory, which would allow one to
implement whatever MergePolicy he wants (including wrapping others). And we
introduce out-of-the-box a SortingMergePolicyPlugin/Factory which takes flat
attributes to initialize itself, e.g.:
{noformat}
<mergePolicyPlugin class="solr.SortingMergePolicyPlugin">
<sort>f1 desc, f2 asc, ... </sort>
<delegate.class>solr.TieredMergePolicy"</delegate.class>
<delegate.mergeFactor>10</delegate.mergeFactor>
</mergePolicyPlugin>
{noformat}
Alternatively, if this works too, it's better IMO:
{noformat}
<mergePolicyPlugin class="solr.SortingMergePolicyPlugin">
<sort>f1 desc, f2 asc, ... </sort>
<delegate class="solr.TieredMergePolicy"
mergeFactor="10"
...
</delegate>
</mergePolicyPlugin>
{noformat}
> make Lucene's SortingMergePolicy and EarlyTerminatingSortingCollector
> configurable in Solr
> ------------------------------------------------------------------------------------------
>
> Key: SOLR-5730
> URL: https://issues.apache.org/jira/browse/SOLR-5730
> Project: Solr
> Issue Type: New Feature
> Reporter: Christine Poerschke
> Assignee: Christine Poerschke
> Priority: Minor
> Attachments: SOLR-5730-part1of2.patch, SOLR-5730-part1of2.patch,
> SOLR-5730-part2of2.patch, SOLR-5730-part2of2.patch
>
>
> *Example configuration (solrconfig.xml):*
> {noformat}
> <sortMerges enable="true">
> <str name="sort">timestamp desc</str>
> </sortMerges>
> {noformat}
> *Example use (EarlyTerminatingSortingCollector):*
> {noformat}
> &sort=timestamp+desc&segmentTerminateEarly=true
> {noformat}
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