[HADOOP-16493] S3AFilesystem.initiateRename() can skip check on dest.parent status if src has same parent

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 3.3.0
• Component/s: fs/s3
• Assignee: Steve Loughran
• Reporter: Steve Loughran
• Created: 06/Aug/19 16:50
• Updated: 17/Aug/20 09:59
• Resolved: 17/Aug/20 09:59

Description

Speedup inferred from debug logs (probably not a regression from HADOOP-15183, more something we'd not noticed).

There's a check in initiateRename() to make sure the parent dir of the dest exists.
If dest.getParent() is src.getParent() (i.e. a same dire rename) or is any other ancestor, we don't need those HEAD/LIST requests.

Issue Links

• Is contained by: HADOOP-13230 S3A to optionally retain directory markers
• links to: GitHub Pull Request #1833