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https://issues.apache.org/jira/browse/HBASE-11861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14241427#comment-14241427
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Jonathan Hsieh commented on HBASE-11861:
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I'll do a writeup of the cartoon version I posted a while back addressing race
condtions, where different actions happen and how we could dole out compaction
work across the cluster.
> 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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