[HDFS-15781] Add metrics for how blocks are moved in replaceBlock

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.4.0
• Component/s: datanode
• Labels: pull-request-available
• Hadoop Flags: Reviewed
• Assignee: Leon Gao
• Reporter: Leon Gao
• Created: 18/Jan/21 23:55
• Updated: 24/Feb/21 06:31
• Resolved: 24/Feb/21 06:31

Description

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

 

Issue Links

• links to: GitHub Pull Request #2704