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https://issues.apache.org/jira/browse/PIG-200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260170#comment-13260170
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Dmitriy V. Ryaboy commented on PIG-200:
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Funny, was just looking at the same thing. It's pig being silly about what
projections do -- try loading without a schema, and ordering by the field
ordinal. The extra MR job will go away.
Seems like a serious performance regression that we should fix asap.
> Pig Performance Benchmarks
> --------------------------
>
> Key: PIG-200
> URL: https://issues.apache.org/jira/browse/PIG-200
> Project: Pig
> Issue Type: Task
> Reporter: Amir Youssefi
> Assignee: Alan Gates
> Fix For: 0.2.0
>
> Attachments: generate_data.pl, perf-0.6.patch, perf.hadoop.patch,
> perf.patch, pigmix2.patch, pigmix_pig0.11.patch
>
>
> To benchmark Pig performance, we need to have a TPC-H like Large Data Set
> plus Script Collection. This is used in comparison of different Pig releases,
> Pig vs. other systems (e.g. Pig + Hadoop vs. Hadoop Only).
> Here is Wiki for small tests: http://wiki.apache.org/pig/PigPerformance
> I am currently running long-running Pig scripts over data-sets in the order
> of tens of TBs. Next step is hundreds of TBs.
> We need to have an open large-data set (open source scripts which generate
> data-set) and detailed scripts for important operations such as ORDER,
> AGGREGATION etc.
> We can call those the Pig Workouts: Cardio (short processing), Marathon (long
> running scripts) and Triathlon (Mix).
> I will update this JIRA with more details of current activities soon.
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