Yonger created HADOOP-15087:
-------------------------------

             Summary: Write directly without creating temp directory to avoid 
rename 
                 Key: HADOOP-15087
                 URL: https://issues.apache.org/jira/browse/HADOOP-15087
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs/s3
            Reporter: Yonger


Rename in workloads like Teragen/Terasort who use Hadoop default 
outputcommitters really hurt performance a lot. 
Stocator announce it doesn't create the temporary directories any all, and 
still preserves Hadoop's fault tolerance. I add a switch when creating file via 
integrating it's code into s3a, I got 5x performance gain in Teragen and 15% 
performance improvement in Terasort.

 



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