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From "Eugene Koifman (JIRA)" <>
Subject [jira] [Updated] (HIVE-17089) make acid 2.0 the default
Date Thu, 10 Aug 2017 23:06:00 GMT


Eugene Koifman updated HIVE-17089:
    Attachment: HIVE-17089.09.patch

> make acid 2.0 the default
> -------------------------
>                 Key: HIVE-17089
>                 URL:
>             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, HIVE-17089.09.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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