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https://issues.apache.org/jira/browse/HIVE-17089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-17089:
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Description:
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.
was:
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. Then upgrade to Hive 3.0 can take place.
> 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
>
>
> 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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