Olga Natkovich commented on PIG-856:

Hi Milind, yes, these are very good points. 

I was hoping that we could set the flag for jobs that produce temparary results 
only but I did not clearly state this in the bug.

I am also considering replication of 1 as I agree it should yield much better 
performance gains. My plan is to run a test on a large query (join + order by) 
with replication factor of 1, 2, and default and see what perf differences are.

> PERFORMANCE: reduce number of replicas
> --------------------------------------
>                 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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