Navis created HIVE-3841: --------------------------- Summary: Sampling in previous MR for range partitioning of next RS Key: HIVE-3841 URL: https://issues.apache.org/jira/browse/HIVE-3841 Project: Hive Issue Type: Improvement Components: Query Processor Reporter: Navis Assignee: Navis Priority: Minor
Currently hive enforces single reducer for order by clause, which can be performance bottleneck. If sampling could be done on ordering key at previous MR stage, multiple reducers could be assigned for it. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira