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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6924) MapJoinKeyBytes::hashCode() should use Murmur hash
Date Thu, 17 Apr 2014 18:39:16 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13973253#comment-13973253
] 

Ashutosh Chauhan commented on HIVE-6924:
----------------------------------------

Not sure, but I hear Cuckoo hashing is even better. We have internal implementation of it
in ql/exec/vector/expressions/CuckooSetBytes.java Shall we use that?

> MapJoinKeyBytes::hashCode() should use Murmur hash
> --------------------------------------------------
>
>                 Key: HIVE-6924
>                 URL: https://issues.apache.org/jira/browse/HIVE-6924
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-6924.patch
>
>
> Existing hashCode is bad, causes HashMap to cluster



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