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

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

Deepak Jaiswal created HIVE-18910:
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             Summary: 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


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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