[jira] [Created] (HDFS-11171) Add localBytesRead and localReadTime for datanode metrics to calculate local read rate which is useful to compare .

["5feixiang (JIRA)" <ji...@apache.org>]

5feixiang created HDFS-11171:
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             Summary: Add localBytesRead and localReadTime for datanode metrics to calculate local read rate which is useful to compare .
                 Key: HDFS-11171
                 URL: https://issues.apache.org/jira/browse/HDFS-11171
             Project: Hadoop HDFS
          Issue Type: Wish
          Components: datanode
            Reporter: 5feixiang
            Priority: Minor


Current dfs context metrics only contains bytesRead ,remoteBytesRead and totalReadTime.We can find  that bytesRead= remoteBytesRead +balance remote copyBytesRead+localBytesRead, so we can add  localBytesRead and localReadTime to calcute local read rate which is usefu to compate local read rate between short-circuit read and tcp-socket read.



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