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https://issues.apache.org/jira/browse/HIVE-21948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-21948:
-------------------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Pushed to master, thanks [~kkasa]!

> Implement parallel processing in Pre Upgrade Tool
> -------------------------------------------------
>
>                 Key: HIVE-21948
>                 URL: https://issues.apache.org/jira/browse/HIVE-21948
>             Project: Hive
>          Issue Type: Improvement
>          Components: Transactions
>    Affects Versions: 3.1.0
>            Reporter: Krisztian Kasa
>            Assignee: Krisztian Kasa
>            Priority: Major
>             Fix For: 4.0.0
>
>         Attachments: HIVE-21948.1.patch, HIVE-21948.2.patch, 
> HIVE-21948.3.patch, HIVE-21948.4.patch, HIVE-21948.5.patch
>
>
> Pre Upgrade Tool scans for all databases and tables in the warehouse 
> sequentially which can be very slow in case of lots of tables.
> Example: It took the process 8-10 hours to complete on ~500k tables.



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