Eugene Koifman updated HIVE-17089:
    Attachment: HIVE-17089.07.patch

> make acid 2.0 the default
> -------------------------
>                 Key: HIVE-17089
>                 URL: https://issues.apache.org/jira/browse/HIVE-17089
>             Project: Hive
>          Issue Type: New Feature
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>         Attachments: HIVE-17089.01.patch, HIVE-17089.03.patch, 
> HIVE-17089.05.patch, HIVE-17089.06.patch, HIVE-17089.07.patch
> acid 2.0 is introduced in HIVE-14035.  It replaces Update events with a 
> combination of Delete + Insert events.  This now makes U=D+I the default (and 
> only) supported acid table type in Hive 3.0.  
> The expectation for upgrade is that Major compaction has to be run on all 
> acid tables in the existing Hive cluster and that no new writes to these 
> table take place since the start of compaction (Need to add a mechanism to 
> put a table in read-only mode - this way it can still be read while it's 
> being compacted).  Then upgrade to Hive 3.0 can take place.

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