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https://issues.apache.org/jira/browse/LUCENE-3210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051147#comment-13051147
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Yonik Seeley commented on LUCENE-3210:
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Good idea... +1 for a power factor above 1.
> TieredMergePolicy should expose control over how aggressively segments with
> deletions are targeted
> ---------------------------------------------------------------------------------------------------
>
> Key: LUCENE-3210
> URL: https://issues.apache.org/jira/browse/LUCENE-3210
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 3.3, 4.0
>
>
> TMP today always does a linear pro-rating of a merge's score according to
> what pctg of the documents are deleted; I'd like to 1) put a power factor in
> (score is multiplicative), and 2) default it to stronger favoring of merging
> away deletions.
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