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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-4169) Add per-disk latency metrics to DataNode
Date Tue, 03 Jan 2017 19:36:59 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Xiaoyu Yao resolved HDFS-4169.
          Resolution: Duplicate
       Fix Version/s: 3.0.0-alpha2
    Target Version/s:   (was: )

> Add per-disk latency metrics to DataNode
> ----------------------------------------
>                 Key: HDFS-4169
>                 URL: https://issues.apache.org/jira/browse/HDFS-4169
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Todd Lipcon
>            Assignee: Xiaoyu Yao
>             Fix For: 3.0.0-alpha2
> Currently, if one of the drives on the DataNode is slow, it's hard to determine what
the issue is. This can happen due to a failing disk, bad controller, etc. It would be preferable
to expose per-drive metrics/jmx with latency statistics about how long reads/writes are taking.

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