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https://issues.apache.org/jira/browse/HIVE-18910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Deepak Jaiswal updated HIVE-18910:
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    Attachment: HIVE-18910.28.patch

> Migrate to Murmur hash for shuffle and bucketing
> ------------------------------------------------
>
>                 Key: HIVE-18910
>                 URL: https://issues.apache.org/jira/browse/HIVE-18910
>             Project: Hive
>          Issue Type: Task
>            Reporter: Deepak Jaiswal
>            Assignee: Deepak Jaiswal
>            Priority: Major
>         Attachments: HIVE-18910.1.patch, HIVE-18910.10.patch, 
> HIVE-18910.11.patch, HIVE-18910.12.patch, HIVE-18910.13.patch, 
> HIVE-18910.14.patch, HIVE-18910.15.patch, HIVE-18910.16.patch, 
> HIVE-18910.17.patch, HIVE-18910.18.patch, HIVE-18910.19.patch, 
> HIVE-18910.2.patch, HIVE-18910.20.patch, HIVE-18910.21.patch, 
> HIVE-18910.22.patch, HIVE-18910.23.patch, HIVE-18910.24.patch, 
> HIVE-18910.25.patch, HIVE-18910.26.patch, HIVE-18910.27.patch, 
> HIVE-18910.28.patch, HIVE-18910.3.patch, HIVE-18910.4.patch, 
> HIVE-18910.5.patch, HIVE-18910.6.patch, HIVE-18910.7.patch, 
> HIVE-18910.8.patch, HIVE-18910.9.patch
>
>
> Hive uses JAVA hash which is not as good as murmur for better distribution 
> and efficiency in bucketing a table.
> Migrate to murmur hash but still keep backward compatibility for existing 
> users so that they dont have to reload the existing tables.



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