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From "Virajith Jalaparti (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12778) [READ] Report multiple locations for PROVIDED blocks
Date Sat, 04 Nov 2017 00:01:06 GMT
Virajith Jalaparti created HDFS-12778:
-----------------------------------------

             Summary: [READ] Report multiple locations for PROVIDED blocks
                 Key: HDFS-12778
                 URL: https://issues.apache.org/jira/browse/HDFS-12778
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Virajith Jalaparti
            Priority: Major


On {{getBlockLocations}}, only one Datanode is returned as the location for all PROVIDED blocks.
This can hurt the performance of applications which typically 3 locations per block. We need
to return multiple Datanodes for each PROVIDED block for better application performance/resilience.




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