Yiqun Lin created HDFS-11282:
--------------------------------

             Summary: Document the missing metrics of DataNode Volume IO 
operations
                 Key: HDFS-11282
                 URL: https://issues.apache.org/jira/browse/HDFS-11282
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: documentation
    Affects Versions: 3.0.0-alpha2
            Reporter: Yiqun Lin
            Assignee: Yiqun Lin
            Priority: Minor


In HDFS-10959, it added many metrics of datanode volume io opearions. But it 
hasn't been documented. This JIRA addressed on this.



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