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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CRUNCH-3) Replicated ("map-side") joins
Date Thu, 05 Jul 2012 22:12:33 GMT
Josh Wills created CRUNCH-3:
-------------------------------

             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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