[HDFS-15549] Use Hardlink to move replica between DISK and ARCHIVE storage if on same filesystem mount

• Type: Sub-task
• Status: Resolved
• Priority: Major
• 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: 29/Aug/20 00:32
• Updated: 16/Jan/21 00:45
• Resolved: 16/Jan/21 00:29

Description

When moving blocks between DISK/ARCHIVE, we should prefer the volume on the same underlying filesystem and use "rename" instead of "copy" to save IO.

Issue Links

• links to: GitHub Pull Request #2583