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Ming Ma updated HDFS-7491: -------------------------- Attachment: HDFS-7491-2.patch Thanks, Chris. Here is the updated patch to have the unit test verify the metrics result. > 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 > Components: datanode > Reporter: Ming Ma > Assignee: Ming Ma > Priority: Minor > Attachments: HDFS-7491-2.patch, HDFS-7491.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)