Chris Nauroth created HADOOP-13451:
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             Summary: S3Guard: Implement access policy using metadata store as 
source of truth.
                 Key: HADOOP-13451
                 URL: https://issues.apache.org/jira/browse/HADOOP-13451
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
            Reporter: Chris Nauroth
            Priority: Minor


Implement an S3A access policy that provides strong consistency and improved 
performance by using the metadata store as the source of truth for metadata 
operations.  In many cases, this will allow S3A to short-circuit calls to S3.  
Assuming shorter latency for calls to the metadata store compared to S3, we 
expect this will improve overall performance.  With this policy, a client may 
not be capable of reading data loaded into an S3 bucket by external tools that 
don't integrate with the metadata store.  Users need to be made aware of this 
limitation.



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