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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7491) Add incremental blockreport latency to DN metrics
Date Mon, 08 Dec 2014 21:20:13 GMT
Ming Ma created HDFS-7491:
-----------------------------

             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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