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https://issues.apache.org/jira/browse/HIVE-18192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299686#comment-16299686
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Sankar Hariappan commented on HIVE-18192:
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Design document is attached in the umbrella jira HIVE-18320.
> Introduce WriteID per table rather than using global transaction ID
> -------------------------------------------------------------------
>
> Key: HIVE-18192
> URL: https://issues.apache.org/jira/browse/HIVE-18192
> Project: Hive
> Issue Type: Sub-task
> Components: HiveServer2, Transactions
> Affects Versions: 3.0.0
> Reporter: anishek
> Assignee: Sankar Hariappan
> Labels: ACID, DR
> Fix For: 3.0.0
>
>
> To support ACID replication, we will be introducing a per table write Id
> which will replace the transaction id in the primary key for each row in a
> ACID table.
> The current primary key is determined via
> <original transaction id, bucketid , rowid>
> which will move to
> <write id, bucketid, rowid>
> a persistable map of global txn id -> to table -> write id for that table has
> to be maintained to now allow Snapshot isolation.
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