[GitHub] [hadoop] tomscut opened a new pull request #3643: HDFS-16315. Add metrics related to Transfer and NativeCopy for DataNode

[GitBox]

tomscut opened a new pull request #3643:
URL: https://github.com/apache/hadoop/pull/3643


   JIRA: [HDFS-16315](https://issues.apache.org/jira/browse/HDFS-16315).
   
   Datanodes already have `Read`, `Write`, `Sync` and `Flush` metrics. We 
should add `NativeCopy` and `Transfer` as well.
   
   Here is a partial look after the change:
   
![image](https://user-images.githubusercontent.com/55134131/141215328-9403c3d9-406b-417a-83ab-f93b19aa4bb7.png)
   


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