hadoop outputformat-阿里云

Hadoop学习---7、OutputFormat数据输出、MapReduce内核源码解析、Join应用、数据清洗、MapReduce开发总结（二）

3、Join应用3.1 Reduce Join（1）Map端的主要工作：为来自不同表或文件的key/value对，打标签以区别不同来源的记录。然后用连接字段作为key，其余部分和新加的标志作为value，最后进行输出。（2）Reduce端的主要工作：在Reduce端以连接...

Hadoop学习---7、OutputFormat数据输出、MapReduce内核源码解析、Join应用、数据清洗、MapReduce开发总结（一）

1、OutputFormat数据输出1.1 OutputFormat接口实现类OutputFormat是MapReduce输出的基类，所以实现MapReduce输出都实现了OutputFormat接口。1、MapReduce默认的输出格式是TextOutputFormat2、也可以自定义Output...

大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第一阶段

33 课时 |

283 人已学 |

加入学习

大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第二阶段

28 课时 |

248 人已学 |

加入学习

大数据实战项目：反爬虫系统（Lua+Spark+Redis+Hadoop框架搭建）第三阶段

25 课时 |

92 人已学 |

加入学习

hadoop中OutputFormat 接口的设计与实现

OutputFormat 主要用于描述输出数据的格式，它能够将用户提供的 key/value 对写入特定格式的文件中。本文将介绍 Hadoop 如何设计 OutputFormat 接口，以及一些常用的OutputFormat 实现。 1.旧版 API 的 OutputFormat 解析如图所...

Hadoop OutputFormat浅析

在Hadoop中，OutputFormat和InputFormat是相对应的两个东西。相比于InputFormat，OutputFormat似乎没有那么多细节。InputFormat涉及到对输入数据的解析和划分，继而影响到Map任务的数目，以及Map任务的调度（见《Hadoop InputForma...

共有4条

< 1 >

跳转至： GO

更新时间 2023-08-07 10:18:38

本页面内关键词为智能算法引擎基于机器学习所生成，如有任何问题，可在页面下方点击"联系我们"与我们沟通。

产品推荐

{"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":2,"count":2}]},"card":[{"des":"基于阿里云 E-MapReduce 、OSS 、边缘网络加速等产品及服务，帮助自建 Hadoop 用户快速构建云上半托管开源大数据平台，帮助客户更加便捷地迭代企业大数据平台架构，聚焦业务价值开发。","link1":"https://www.aliyun.com/solution/growth-service/slemr","link":"https://www.aliyun.com/solution/growth-service/slemr","icon":"https://img.alicdn.com/imgextra/i4/O1CN01K9Svmd1sBvo2u5PKn_!!6000000005729-2-tps-201-200.png","btn2":"立即咨询","tip":"更多优质解决方案 <a href=\"https://www.aliyun.com/solution/all \" target=\"_blank\"> 立即查看 <a href=\"https://page.aliyun.com/form/act1851795571/index.htm\" target=\"_blank\">立即咨询","btn1":"方案详情","link2":"https://www.aliyun.com/core/online-consult?from=F9OmJ488XR","title":"中小企业自建Hadoop集群上云解决方案"}],"search":[{"txt":"企业跨地域网络互通","link":"https://www.aliyun.com/solution/growth-general/slcrossregionnetwork"},{"link":"https://www.aliyun.com/solution/growth-general/slhhyxsxxsh","txt":"混合云线下线上双活"}],"countinfo":{"search":{"length_pc":0,"length":0},"card":{"length_pc":0,"length":0}},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","iconImg":"https://img.alicdn.com/imgextra/i1/O1CN014XEWEW1hMVB3Ydp04_!!6000000004263-0-tps-200-200.jpg","btn1":"方案详情","btn3":"查看更多方案","btn2":"立即咨询","link3":"https://www.aliyun.com/solution/all","link2":"https://www.aliyun.com/core/online-consult?from=F9OmJ488XR","link":"https://www.aliyun.com/solution/growth-service/slemr","contentLink":"https://www.aliyun.com/solution/growth-service/slemr","link1":"https://www.aliyun.com/solution/growth-service/slemr","title":"中小企业自建Hadoop集群上云解决方案","des":"基于阿里云 E-MapReduce 、OSS 、边缘网络加速等产品及服务，帮助自建 Hadoop 用户快速构建云上半托管开源大数据平台，帮助客户更加便捷地迭代企业大数据平台架构，聚焦业务价值开发。","infoGroup":[{"infoName":"推荐搜索","infoContent":{"firstContentName":"企业跨地域网络互通","firstContentLink":"https://www.aliyun.com/solution/growth-general/slcrossregionnetwork","lastContentName":"混合云线下线上双活","lastContentLink":"https://www.aliyun.com/solution/growth-general/slhhyxsxxsh"}}]}]}

{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":2,"count":2}]},"card":[{"des":"基于阿里云 E-MapReduce 、OSS 、边缘网络加速等产品及服务，帮助自建 Hadoop 用户快速构建云上半托管开源大数据平台，帮助客户更加便捷地迭代企业大数据平台架构，聚焦业务价值开发。","link1":"https://www.aliyun.com/solution/growth-service/slemr","link":"https://www.aliyun.com/solution/growth-service/slemr","icon":"https://img.alicdn.com/imgextra/i4/O1CN01K9Svmd1sBvo2u5PKn_!!6000000005729-2-tps-201-200.png","btn2":"立即咨询","tip":"更多优质解决方案 <a href=\"https://www.aliyun.com/solution/all \" target=\"_blank\"> 立即查看 <a href=\"https://page.aliyun.com/form/act1851795571/index.htm\" target=\"_blank\">立即咨询","btn1":"方案详情","link2":"https://www.aliyun.com/core/online-consult?from=F9OmJ488XR","title":"中小企业自建Hadoop集群上云解决方案"}],"search":[{"txt":"企业跨地域网络互通","link":"https://www.aliyun.com/solution/growth-general/slcrossregionnetwork"},{"link":"https://www.aliyun.com/solution/growth-general/slhhyxsxxsh","txt":"混合云线下线上双活"}],"countinfo":{"search":{"length_pc":0,"length":0},"card":{"length_pc":0,"length":0}},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","iconImg":"https://img.alicdn.com/imgextra/i1/O1CN014XEWEW1hMVB3Ydp04_!!6000000004263-0-tps-200-200.jpg","btn1":"方案详情","btn3":"查看更多方案","btn2":"立即咨询","link3":"https://www.aliyun.com/solution/all","link2":"https://www.aliyun.com/core/online-consult?from=F9OmJ488XR","link":"https://www.aliyun.com/solution/growth-service/slemr","contentLink":"https://www.aliyun.com/solution/growth-service/slemr","link1":"https://www.aliyun.com/solution/growth-service/slemr","title":"中小企业自建Hadoop集群上云解决方案","des":"基于阿里云 E-MapReduce 、OSS 、边缘网络加速等产品及服务，帮助自建 Hadoop 用户快速构建云上半托管开源大数据平台，帮助客户更加便捷地迭代企业大数据平台架构，聚焦业务价值开发。","infoGroup":[{"infoName":"推荐搜索","infoContent":{"firstContentName":"企业跨地域网络互通","firstContentLink":"https://www.aliyun.com/solution/growth-general/slcrossregionnetwork","lastContentName":"混合云线下线上双活","lastContentLink":"https://www.aliyun.com/solution/growth-general/slhhyxsxxsh"}}]}]}}