Leon Gao created HDFS-15781:
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Summary: Add metrics for block movemements
Key: HDFS-15781
URL: https://issues.apache.org/jira/browse/HDFS-15781
Project: Hadoop HDFS
Issue Type: Sub-task
Components: datanode
Reporter: Leon Gao
Assignee: Leon Gao
We can add some metrics for to track how the blocks are being moved, to get a
sense of the locality of movements.
* How many blocks copied to local host?
* How many blocks moved to local disk thru hardlink?
* How many blocks are copied out of the host
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