一个简单的mapreduce实现，用来理解Google mapreduce分布计算程序框架。-Mapreduce the realization of a simple to understand Google mapreduce fr a mework distributed computing.

mapreduce 逗号分离与join -mapreduce 逗号分离与join

mapreduce源代码编程，工厂表与地区表的两表连接，使用的是reduce端连接-mapreduce Multiple table join source code

Abstract: Map-Reduce is a programming model that enables easy development of scalable parallel applications to process vast amounts of data on large clusters of commodity machines. Through a simple interface with two f