Josh Wills created CRUNCH-3:
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Summary: Replicated ("map-side") joins
Key: CRUNCH-3
URL: https://issues.apache.org/jira/browse/CRUNCH-3
Project: Crunch
Issue Type: New Feature
Components: MapReduce Patterns
Reporter: Josh Wills
Replicated joins are a common way to improve performance when joining a large
dataset with a small one. The smaller dataset is loaded into memory in the
mapper/reducer tasks, and is then joined with the larger dataset as the large
one is processed by the MapReduce job itself.
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