recommendation in mapreduce job
基于hadoop mapreduce作业的分布式推荐算法框架
(A distributed recommendation algorithm framework based on hadoop mapreduce job)
目标（goal）：
1) 和mahout做对比，提高分布式推荐算法性能.
(Compared with mahout, improve the performance of distributed recommendation algorithm.)
2) 实现多种分布式推荐算法. \n
(Achieve a variety of distributed recommendation algorithm.)