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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4169) Add per-disk latency metrics to DataNode
Date Thu, 08 Nov 2012 21:24:12 GMT
Todd Lipcon created HDFS-4169:
---------------------------------

             Summary: 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: data-node
    Affects Versions: 3.0.0
            Reporter: Todd Lipcon


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 MXBeans (or tagged metrics) with latency statistics about how long reads/writes
are taking.

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