Dave Latham commented on HBASE-20101:

Can you share more about moving blocks to restore locality?  Now that's 
something that would be awesome to see inside HBase, so that it doesn't require 
a compaction.

> HBase should provide a way to re-validate locality
> --------------------------------------------------
>                 Key: HBASE-20101
>                 URL: https://issues.apache.org/jira/browse/HBASE-20101
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Jean-Marc Spaggiari
>            Assignee: huaxiang sun
>            Priority: Major
> HDFS blocks can move for many reasons. HDFS balancing, lost of a disk, of a 
> node, etc. However, today, locality seems to be calculated when the files are 
> opened for the first time. Even disabling and re-enabling the regions doesn't 
> trigger a re-calculation of the locality. 
> We should provide a way to let the user ask for this number to be 
> re-calculated.

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