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From "Jitendra Nath Pandey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4169) Add per-disk latency metrics to DataNode
Date Tue, 03 Jan 2017 19:31:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15795959#comment-15795959

Jitendra Nath Pandey commented on HDFS-4169:

This seems to be a duplicate of HDFS-10959. 

> 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
> 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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