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https://issues.apache.org/jira/browse/HBASE-4991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13194282#comment-13194282
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Zhihong Yu commented on HBASE-4991:
-----------------------------------

BTW OnlineMerger is in src/main/java/org/apache/hadoop/hbase/util/HMerge.java

I think for this case we don't need to create an empty region because we would 
end up closing at least two regions. That may increase the downtime for the 
underlying table.
                
> Provide capability to delete named region
> -----------------------------------------
>
>                 Key: HBASE-4991
>                 URL: https://issues.apache.org/jira/browse/HBASE-4991
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>
> See discussion titled 'Able to control routing to Solr shards or not' on 
> lily-discuss
> User may want to quickly dispose of out of date records by deleting specific 
> regions. 

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