Details
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Improvement
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Status: Closed
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Major
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Resolution: Won't Fix
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0.5, 0.6
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None
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None
Description
The code in org.apache.mahout.cf.taste.hadoop.als.PredictionJob should be refactored to use org.apache.hadoop.mapreduce.lib.input.MultipleInputs for the reduce-side joins. This should spare us some M/R cycles and greatly simplify the code.
We'd need to add another prepareJob() method to AbstractJob in order to make this work.
This is a rather cosmetic feature request that can wait till after the 0.5 release.