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From "5feixiang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11171) Add localBytesRead and localReadTime for datanode metrics to calculate local read rate which is useful to compare .
Date Thu, 24 Nov 2016 06:40:59 GMT
5feixiang created HDFS-11171:
--------------------------------

             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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