MapReduce Tutorial 思考总结

文章目录Prerequisites(前置条件)Overview(概览)Inputs and Outputs(输入和输出)MapReduce – User Interfaces(MR的用户接口)MapperHow Many Maps?ReducershufflesortSecondary SortReduceHow Many Reduces?Reducer NONEPartitionerCounterJob ConfigurationTask Execution & EnvironmentMemory ManagementMap ParametersShuffle/Reduce Paramete