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https://issues.apache.org/jira/browse/PIG-1249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12838227#action_12838227
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Jeff Zhang commented on PIG-1249:
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+1, And I find that hive can estimate the reducer number according the input
size. This is a really useful feature.
> Safe-guards against misconfigured Pig scripts without PARALLEL keyword
> ----------------------------------------------------------------------
>
> Key: PIG-1249
> URL: https://issues.apache.org/jira/browse/PIG-1249
> Project: Pig
> Issue Type: Improvement
> Reporter: Arun C Murthy
> Priority: Critical
>
> It would be *very* useful for Pig to have safe-guards against naive scripts
> which process a *lot* of data without the use of PARALLEL keyword.
> We've seen a fair number of instances where naive users process huge
> data-sets (>10TB) with badly mis-configured #reduces e.g. 1 reduce.
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