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Posted to issues@hive.apache.org by "Teddy Choi (JIRA)" <ji...@apache.org> on 2018/12/05 16:25:00 UTC

[jira] [Updated] (HIVE-21011) Upgrade MurmurHash 2.0 to 3.0 in vectorized map and reduce operators

     [ https://issues.apache.org/jira/browse/HIVE-21011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Teddy Choi updated HIVE-21011:
------------------------------
    Status: Patch Available  (was: Open)

> Upgrade MurmurHash 2.0 to 3.0 in vectorized map and reduce operators
> --------------------------------------------------------------------
>
>                 Key: HIVE-21011
>                 URL: https://issues.apache.org/jira/browse/HIVE-21011
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Teddy Choi
>            Assignee: Teddy Choi
>            Priority: Major
>
> HIVE-20873 improved map join performance by using MurmurHash 3.0. However, there's more operators that can use it. VectorMapJoinCommonOperator and VectorReduceSinkUniformHashOperator use MurmurHash 2.0, so it can be upgraded to MurmurHash 3.0.



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