Ming Ma created HDFS-7491:
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             Summary: Add incremental blockreport latency to DN metrics
                 Key: HDFS-7491
                 URL: https://issues.apache.org/jira/browse/HDFS-7491
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Ming Ma
            Priority: Minor


In a busy cluster, IBR processing could be delayed due to NN FSNamesystem lock 
and cause NN to throw NotReplicatedYetException to DFSClient and thus increase 
the overall application latency.

This will be taken care of when we address the NN FSNamesystem lock contention 
issue.

It is useful if we can provide IBR latency metrics from DN's point of view.



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