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Posted to hdfs-issues@hadoop.apache.org by "Ming Ma (JIRA)" <ji...@apache.org> on 2015/03/11 16:58:38 UTC

[jira] [Updated] (HDFS-7491) Add incremental blockreport latency to DN metrics

     [ 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, 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.



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