技术hadoop源码的相关内容

文章 2023-12-20 来自：开发者社区

【大数据技术Hadoop+Spark】Spark RDD创建、操作及词频统计、倒排索引实战（超详细附源码）

需要源码和数据集请点赞关注收藏后评论区留言私信~~~一、RDD的创建Spark可以从Hadoop支持的任何存储源中加载数据去创建RDD，包括本地文件系统和HDFS等文件系统。我们通过Spark中的SparkContext对象调用textFile()方法加载数据创建RDD。1、从文件系统加载数据创建RDD从运行结果反馈的信息可以看出，wordfile是一个String类型的RDD，或者以后可以简单....

文章 2023-12-20 来自：开发者社区

【大数据技术Hadoop+Spark】HBase数据模型、Shell操作、Java API示例程序讲解（附源码超详细）

一、HBase数据模型HBase分布式数据库的数据存储在行列式的表格中，它是一个多维度的映射模型，其数据模型如下所示。表的索引是行键，列族，列限定符和时间戳，表在水平方向由一个或者多个列族组成，一个列族中可以包含任意多个列，列族支持动态扩展，可以很轻松的添加一个列族或者列，无须预先定义列的数量及数据类型，所有列均以字符串形式存储RowKey表示行键，每个HBase表中只能有一个行键，它在HBas....

文章 2023-12-20 来自：开发者社区

【大数据技术Hadoop+Spark】MapReduce之单词计数和倒排索引实战（附源码和数据集超详细）

源码和数据集请点赞关注收藏后评论区留言私信~~~一、统计单词出现次数单词计数是最简单也是最能体现MapReduce思想的程序之一，可以称为MapReduce版“Hello World。其主要功能是统计一系列文本文件中每个单词出现的次数程序解析首先MapReduce将文件拆分成splits，由于测试用的文件较小，只有二行文字，所以每个文件为一个split，并将文件按行分割形成<key， va....

文章 2023-12-20 来自：开发者社区

【大数据技术Hadoop+Spark】HDFS Shell常用命令及HDFS Java API详解及实战（超详细附源码）

需要源码请点赞关注收藏后评论区留言私信~~~一、HDFS的Shell介绍Shell在计算机科学中俗称“壳”，是提供给使用者使用界面的进行与系统交互的软件，通过接收用户输入的命令执行相应的操作，Shell分为图形界面Shell和命令行式Shell。文件系统（FS）Shell包含了各种的类Shell的命令，可以直接与Hadoop分布式文件系统以及其他文件系统进行交互。常用命令如下二、案例-Shel....

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开源大数据平台 E-MapReduce

开源大数据平台 E-MapReduce（简称“EMR”）是云原生开源大数据平台，向客户提供简单易集成的Hadoop、Hive、Spark、Flink、Presto、ClickHouse、StarRocks、Delta、Hudi等开源大数据计算和存储引擎服务。

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立即开通

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最佳实践

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