开源大数据平台 E-MapReduce入门-阿里云

MapReduce入门编程-成绩求和排序

MapReduce入门编程实验目的 1、掌握编程环境的准备方法2、掌握程序的打包方法3、掌握MapReduce任务的运行方法、运行状态的查看方法。实验任务与要求任务：选择一个任务或自定义其他任务使用Map...

MapReduce入门（一篇就够了）

01 引言MapReduce是Hadoop生态圈的一部分，也是最核心的一部分，本文来讲解下。02 MapReduce 概述2.1 MapReduce 定义MapReduce 是一个分布式运算程序的编程框架，是用户开发“基于hadoop的数据分析应用”的核心框架，其核心功能是将用户编写的业务逻辑代码和...

java：MapReduce原理及入门实例：wordcount

MapReduce执行步骤Map处理任务读取文件每一行，解析成<key、value>，调用map函数处理逻辑对key、value处理，行成新的key、value数据分区Reduce处理任务拷贝map任务输出到reduce节点，对map任务输出合并，排序处理逻辑处理key、value，行成...

MapReduce入门例子之WordCount单词计数

0x00 教程内容单词计数操作流程编写MapReduce单词计数代码及简单解释YARN Web UI界面查看0x01 单词计数1. 操作流程a. 建Maven项目b. 导入依赖包PS：a、b两步可参考此文章的0x01 新建maven工程：Java API实现HDFS的相关操作c. 写代码d. 打包到...

【Druid】（七）E-MapReduce 增强型 Druid 入门2

4.5 批量索引4.5.1 与Hadoop集群交互您在创建E-MapReduce Druid集群时如果勾选了HDFS和YARN（自带Hadoop集群），那么系统将会自动为您配置好与HDFS和YARN的交互，您无需做额外操作。下面的介绍是配置独立E-MapReduce Druid集群与独立Hadoop...

【Druid】（七）E-MapReduce 增强型 Druid 入门1

文章目录一、前言二、什么是E-MapReduce ？三、E-MapReduce 增强型 Druid 有哪些特性？四、快速入门4.1 背景信息4.2 创建Druid集群4.3 配置集群4.3.1 配置HDFS作为E-MapReduce Druid的deep storage4.3.2 配置OSS作为E-...

java：MapReduce原理及入门实例：wordcount

MapReduce原理MapperTask -> Shuffle(分区排序分组) -> ReducerTaskMapReduce执行步骤Map处理任务读取文件每一行，解析成，调用map函数处理逻辑对key、value处理，行成新的key、value数据分区Reduce处理任务拷贝map任...

hive在E-MapReduce集群的实践（一）hive异常排查入门

hive是hadoop集群最常用的数据分析工具，只要运行sql就可以分析海量数据。初学者在使用hive时，经常会遇到各种问题，不知道该怎么解决。本文是hive实践系列的第一篇，以E-MapReduce集群环境为例，介绍常见的hive执行异常，定位和解决方法，以及hive日志查看方法。除作者本人的...

Hadoop MapReduce编程 API入门系列之wordcount版本4（八）

是将map、combiner、shuffle、reduce等分开放一个.java里。则需要实现Tool。代码 1 package zhouls.bigdata.myMapR...

Hadoop MapReduce编程 API入门系列之挖掘气象数据版本2（十）

　这篇博文，包括了，实际生产开发非常重要的，单元测试和调试代码。这里不多赘述，直接送上代码。 MRUnit 框架 MRUnit是Cloudera公司专为Hadoop MapReduce写的单元测试框架，API非常简洁实用。MRUnit针对不同测试对象使用不同的Driver： ...

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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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