Steve Loughran created HADOOP-16473:
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             Summary: S3Guard prune to only remove auth dir marker if files 
(not tombstones) are removed
                 Key: HADOOP-16473
                 URL: https://issues.apache.org/jira/browse/HADOOP-16473
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: 3.2.0
            Reporter: Steve Loughran


the {{s3guard prune}} command marks all dirs as non-auth if an entry was 
deleted. This makes sense from a performance perspective. But if only 
tombstones are being purged, it doesn't -all it does is hurt the performance of 
future scans



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