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https://issues.apache.org/jira/browse/HBASE-11861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14240938#comment-14240938
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Anoop Sam John commented on HBASE-11861:
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bq.where should we run the mob compaction? In each region or in a single place 
for example HMaster?
Single place like HM won't be good IMO.  It should be distributed across RSs.


> Native MOB Compaction mechanisms.
> ---------------------------------
>
>                 Key: HBASE-11861
>                 URL: https://issues.apache.org/jira/browse/HBASE-11861
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>    Affects Versions: 2.0.0
>            Reporter: Jonathan Hsieh
>         Attachments: 141030-mob-compaction.pdf, mob compaction.pdf
>
>
> Currently, the first cut of mob will have external processes to age off old 
> mob data (the ttl cleaner), and to compact away deleted or over written data 
> (the sweep tool).  
> From an operational point of view, having two external tools, especially one 
> that relies on MapReduce is undesirable.  In this issue we'll tackle 
> integrating these into hbase without requiring external processes.



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