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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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Krisztian Kasa updated HIVE-21948:
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Status: Open (was: Patch Available)
> 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
>
>
> 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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