Sebastian Schelter created MAHOUT-1166:
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Summary: Multithreaded version of distributed ALS
Key: MAHOUT-1166
URL: https://issues.apache.org/jira/browse/MAHOUT-1166
Project: Mahout
Issue Type: Improvement
Components: Collaborative Filtering
Reporter: Sebastian Schelter
Assignee: Sebastian Schelter
Our implementation of ALS broadcasts the feature matrices in each iteration.
Therefore, it makes sense to run the mappers in multithreaded mode to not have
to load one copy of the feature matrix per core, but share the read-only
in-memory copy.
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