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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9710) Change DN to send block receipt IBRs in batches
Date Wed, 27 Jan 2016 03:39:39 GMT
Tsz Wo Nicholas Sze created HDFS-9710:
-----------------------------------------

             Summary: Change DN to send block receipt IBRs in batches
                 Key: HDFS-9710
                 URL: https://issues.apache.org/jira/browse/HDFS-9710
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze


When a DN has received a block, it immediately sends a block receipt IBR RPC to NN for report
the block.  Even if a DN has received multiple blocks about the same time, it still sends
multiple RPCs.  It does not scale well since NN has to process a huge number of RPCs when
many DNs receiving many blocks at the same time.




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