Hadoop 是一个实现了 MapReduce 计算模型的开源分布式并行编程框架，借助于 Hadoop, 程序员可以轻松地编写分布式并行程序，将其运行于计算机集群上，完成海量数据的计算。-Hadoop is an implementation of the MapReduce computation model of the open-source fr a mework for distributed parallel programming, through the use of Hadoo