PERFORMANCE: reduce number of replicas
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                 Key: PIG-856
                 URL: https://issues.apache.org/jira/browse/PIG-856
             Project: Pig
          Issue Type: Improvement
    Affects Versions: 0.3.0
            Reporter: Olga Natkovich


Currently Pig uses the default number of replicas between MR jobs. Currently, 
the number is 3. Given the temp nature of the data, we should never need more 
than 2 and should explicitely set it to improve performance and to be nicer to 
the name node.

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