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2020-10-19 21:18:53

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2020-10-19 21:18:53 +08:00
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# 第15章 大数据与MapReduce
![大数据与MapReduce首页](http://data.apachecn.org/img/AiLearning/ml/15.BigData_MapReduce/mr_headPage.jpg "大数据与MapReduce首页")
![大数据与MapReduce首页](img/mr_headPage.jpg "大数据与MapReduce首页")
## 大数据 概述
@@ -37,7 +37,7 @@ MapReduce: 分布式的计算框架，可以将单个计算作业分配给多台
* 数据被重复存放在不同的机器上，以防止某个机器失效
* mapper 和 reducer 传输的数据形式为 key/value对
![MapReduce框架的示意图](http://data.apachecn.org/img/AiLearning/ml/15.BigData_MapReduce/mr_1_cluster.jpg "MapReduce框架的示意图")
![MapReduce框架的示意图](img/mr_1_cluster.jpg "MapReduce框架的示意图")
> MapRedece 特点