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https://issues.apache.org/jira/browse/HIVE-14881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15593329#comment-15593329
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Sergey Shelukhin commented on HIVE-14881:
-----------------------------------------
This will also need to account for list bucketing (current ACID cleaner
probably doesn't because LB doesn't work with bucketing, and thus ACID).
List bucketing looks like partition directories inside partition directories,
for a subset of keys.
MM currently puts MM dirs inside of LB dirs. (e.g.
mytable/pkey1=535/pkey2=foo/lbkey=555/mm_0)
If it looks inside delta directories for MM (for whatever reason), it should
also be aware of there being subdirectories there in some cases (at least,
union inserts produce subdirectories for each side of the union; overall, it
seems to be legal in Hive to have arbitrary directory structure inside a
table/partition).
> integrate MM tables into ACID: merge cleaner into ACID threads
> ---------------------------------------------------------------
>
> Key: HIVE-14881
> URL: https://issues.apache.org/jira/browse/HIVE-14881
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sergey Shelukhin
>
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