[HADOOP-19175] update s3a committer docs

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.4.0
• Component/s: documentation, fs/s3
• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 14/May/24 10:16
• Updated: 14/May/24 10:16

Description

Update s3a committer docs

• declare that magic committer is stable and make it the recommended one
• show how to use new command "mapred successfile" to print the success file.