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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