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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7491) Add incremental blockreport latency to DN metrics
Date Wed, 11 Mar 2015 15:58:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ming Ma updated HDFS-7491:
    Attachment: HDFS-7491-4.patch

Thanks Xiaoyu for suggestion. Here is the updated patch.

Chris, given HADOOP-11495 has backport markdown to branch-2, we no longer need another patch
for branch-2.

> 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-7491-3.patch, HDFS-7491-4.patch, HDFS-7491-branch-2.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
> 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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