sunhelly commented on pull request #3825:
URL: https://github.com/apache/hbase/pull/3825#issuecomment-963870288


   Thanks, @Apache9 . The main advantage here is that the first compaction 
after split can be a minor compaction instead of old major compaction, because 
only reference files should be compacted before the next split. In HBASE-26422, 
I described the compaction after splitting using HFileLink.
   It also makes move hfiles between regions of the same table possible. Then 
the compaction is light weight, since it need not to read and rewrite the 
referred files.


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