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Implement skewed join #198

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raronson opened this issue Feb 22, 2013 · 0 comments
Open

Implement skewed join #198

raronson opened this issue Feb 22, 2013 · 0 comments
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New Feature
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0.8.0

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@raronson
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We have hit some performance issues when performing relational joins because of key skew. Pig and hive have implemented optimizations for skewed joins, and it would be nice for something similar to exist in scoobi.

Pig - http://ofps.oreilly.com/titles/9781449302641/advanced_pig_latin.html#skew_join
Hive - https://cwiki.apache.org/confluence/display/Hive/Skewed+Join+Optimization
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@raronson