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https://issues.apache.org/jira/browse/LUCENE-8331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16493290#comment-16493290
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Tommaso Teofili commented on LUCENE-8331:
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bq. I think it should support deletes and should not use IW then I ok with it
 
+1

> MergePolicy simulator utility
> -----------------------------
>
>                 Key: LUCENE-8331
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8331
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Major
>         Attachments: LUCENE-8331.patch
>
>
> This issue introduces a MergePolicy simulator utility to help evaluate the 
> effectiveness of a MergePolicy.  The simulator does not result in the actual 
> indexing and merging of segments; instead it provides some dummy constructs 
> to MergePolicy to evaluate its decisions.  Therefore you can do simulation 
> runs in little time.
> I'm not sure where it would live.  Perhaps dev-tools, or in tests, or in 
> benchmark?
> I mentioned this recently here:
> https://issues.apache.org/jira/browse/LUCENE-7976?focusedCommentId=16446985&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16446985
>  



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