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文章 2024-04-12 来自：开发者社区

Hadoop【基础知识 02】【分布式计算框架MapReduce核心概念+编程模型+combiner&partitioner+词频统计案例解析与进阶+作业的生命周期】（图片来源于网络）

1. 概述同 HDFS 一样，Hadoop MapReduce 也采用了 Master/Slave（M/S）架构，具体如图所示。它主要由以下几个组件组成：Client、JobTracker、TaskTracker 和 Task。下面分别对这几个组件进行介绍。 Client 我们将编写的 MapReduce 程序通过 Client 提交到 JobTracker 端；同时也可通过 Clie...

文章 2024-03-07 来自：开发者社区

构建信息蓝图：概念模型与E-R图的技术解析

概念模型的描述概念模型从数据模型的建模方法来看，一般是先将现实世界中的问题建模为信息世界中的概念模型，然后将信息世界中的概念模型转化为机器世界中的逻辑模型。当确认概念模型已经能够充分表达原问题(现实世界...

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更新时间 2024-05-01 10:03:05

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