Distributed Nonnegative Matrix Factorization for Web-Scale Dyadic Data Analysis on MapReduce

[Edward J. Yoon]

Just FYI,

http://research.microsoft.com/pubs/119077/DNMF.pdf

These guys (Microsoft) like tried to calculation large matrix using
Apache Hama 0.1

-- 
Best Regards, Edward J. Yoon
http://blog.udanax.org
http://twitter.com/eddieyoon