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Posted to issues@hive.apache.org by "Deepak Jaiswal (JIRA)" <ji...@apache.org> on 2018/03/08 21:06:00 UTC

[jira] [Assigned] (HIVE-18910) Migrate to Murmur hash for shuffle and bucketing

     [ https://issues.apache.org/jira/browse/HIVE-18910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Deepak Jaiswal reassigned HIVE-18910:
-------------------------------------


> Migrate to Murmur hash for shuffle and bucketing
> ------------------------------------------------
>
>                 Key: HIVE-18910
>                 URL: https://issues.apache.org/jira/browse/HIVE-18910
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Deepak Jaiswal
>            Assignee: Deepak Jaiswal
>            Priority: Major
>
> 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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