steveloughran commented on pull request #3611:
URL: https://github.com/apache/hadoop/pull/3611#issuecomment-964982131


   converting this to a draft as i don't want it merged in; the etag pr and 
adoption of the resilient commit helper is how I intend to do it. 
   * isolates the etag api and adds s3a coverage
   * avoids going near FileOutputCommitter
   
   the manifest committer is faster than rajesh's patch on object stores where 
listings are slow (done during task commit), and because it doesn't rename in 
task commit, is atomic even on gcs. with rate limiting we can even keep it 
below the load threshold for azure storage. 
   and, because it doesn't touch FileOutputCommitter, safer to merge


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