Siddharth Seth created TEZ-1855:
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             Summary: Avoid scanning for previously written files within Inputs 
/ Outputs
                 Key: TEZ-1855
                 URL: https://issues.apache.org/jira/browse/TEZ-1855
             Project: Apache Tez
          Issue Type: Improvement
            Reporter: Siddharth Seth


TezTaskOutput has a bunch of methods - getOutputFile, getOutputIndexFile, 
getSpillIndexFile - which are used within an  Output to scan for files written 
earlier by the same Output. This should be avoided in favour of keeping track 
of previously written files.



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