mapreduce工作机制
- 作者: 女王大人的天涯
- 来源: 51数据库
- 2020-09-20
分为2个步骤，map和reduce，map专门负责对每个数据独立地同时地打标签，框架会对相同标签的数据分成一组，reduce对分好的那些组数据做累计计算。我们只要分别实现map和reduce就可以了
by the instance anaysis, it gives an detail description to the working principle and calculate process of hadoop architeture mapreduce computation module.
by the instance anaysis, it gives an detail description to the working principle and calculate process of hadoop architeture mapreduce computation module.
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