large scale collaborative filtering using Apache Giraph
This document discusses large scale collaborative filtering using Apache Giraph. It describes neighborhood-based models and matrix factorization for collaborative filtering. It also details how these techniques were implemented and optimized in Giraph to provide recommendations for billions of Facebook users and ratings. Key optimizations included a rotational approach for matrix factorization to
Recommending items to more than a billion people
The growth of data on the web has made it harder to employ many machine learning algorithms on the full data sets. For personalization problems in particular, where data sampling is often not an option, innovating on distributed algorithm design is necessary to allow us to scale to these constantly growing data sets. Collaborative filtering (CF) is one of the important areas where this applies. CF
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