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https://issues.apache.org/jira/browse/HIVE-20707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16641303#comment-16641303
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Prasanth Jayachandran commented on HIVE-20707:
----------------------------------------------

This patch depends on HIVE-20696. Currently it includes HIVE-20696. Once 
HIVE-20696 is committed will rebase the patch again.

Other changes include
 * Moving MSCK code from ql to metastore
 * Added AutoMsckTask that gets scheduled every 5 minutes by default and runs 
MSCK REPAIR for tables marked with "auto.msck"="true" table property
 * "msck.mode" table property for specifying msck repair mode (add/drop/sync)

> Automatic MSCK REPAIR for external tables
> -----------------------------------------
>
>                 Key: HIVE-20707
>                 URL: https://issues.apache.org/jira/browse/HIVE-20707
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 4.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-20707.1.patch
>
>
> In current scenario, to add partitions for external tables to metastore, MSCK 
> REPAIR command has to be executed manually. To avoid this manual step, 
> external tables can be specified a table property based on which a background 
> metastore thread can add/drop/sync partitions periodically. 



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