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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-18910.46.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-18910.29.patch, HIVE-18910.3.patch,
> HIVE-18910.30.patch, HIVE-18910.31.patch, HIVE-18910.32.patch,
> HIVE-18910.33.patch, HIVE-18910.34.patch, HIVE-18910.35.patch,
> HIVE-18910.36.patch, HIVE-18910.36.patch, HIVE-18910.37.patch,
> HIVE-18910.38.patch, HIVE-18910.39.patch, HIVE-18910.4.patch,
> HIVE-18910.40.patch, HIVE-18910.41.patch, HIVE-18910.42.patch,
> HIVE-18910.43.patch, HIVE-18910.44.patch, HIVE-18910.45.patch,
> HIVE-18910.46.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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