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https://issues.apache.org/jira/browse/PIG-856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721570#action_12721570
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Olga Natkovich commented on PIG-856:
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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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