Non-distributed implementation of ALS-WR matrix factorization
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Key: MAHOUT-572
URL: https://issues.apache.org/jira/browse/MAHOUT-572
Project: Mahout
Issue Type: New Feature
Components: Collaborative Filtering
Affects Versions: 0.5
Reporter: Sebastian Schelter
I created a non-distributed implementation of the algorithm described in
"Large-scale Parallel Collaborative Filtering for the Netflix Prize" available
at
http://www.hpl.hp.com/personal/Robert_Schreiber/papers/2008%20AAIM%20Netflix/netflix_aaim08(submitted).pdf.
This gives more choice for users that need an online SVD Recommender and might
be a useful starting point to implementing code that automatically finds a
near-optimal regularization parameter for the distributed version of the
algorithm in MAHOUT-542.
Along with the patch goes a refactoring and polishing of the SVD Recommender
code that separates the factorization computation from the Recommender
implementation. This way it should easily be possible to try out different
factorization approaches with our SVDRecommender.
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