@[toc]3.Hadoop运行模式3.3SSH无密登录配置3.3.1配置ssh3.3.1.1基本语法ssh 另一台电脑的IP地址3.3.1.2ssh连接时出现Host key verification failed的解决方法[summer@hadoop102 ~]$ ssh hadoop103如果出现如下内容Are you sure you want to continue connectin....

文章 2022-08-28 来自：开发者社区

Hadoop运行模式（二）、SSH无密登录配置、生成公钥和私钥、集群配置、集群部署规划、默认配置文件、核心配置文件、HDFS配置文件、YARN配置文件、MapReduce配置文件、在集群上分发配置好的

文章 2018-01-31 来自：开发者社区

HDFS和Yarn和MapReduce

image.png nameNode是主节点，datanodes是子节点。子节点之间双重备份。例如小黄点。一共有七个。看上图右下角rep。 HDFS存储方式是以块的形式存储的，128M最小单元。 image.png NameNode存储 NameNode数据存储在 --内存中 --本地磁盘： ------1、fsimage:镜像文件（nameNode启动后生成的） ---...

文章 2017-05-29 来自：开发者社区

HDFS设计思路，HDFS使用，查看集群状态，HDFS，HDFS上传文件，HDFS下载文件，yarn web管理界面信息查看，运行一个mapreduce程序，mapreduce的demo

26 集群使用初步 HDFS的设计思路 l 设计思想分而治之：将大文件、大批量文件，分布式存放在大量服务器上，以便于采取分而治之的方式对海量数据进行运算分析； l 在大数据系统中作用：为各类分布式运算框架（如：mapreduce，spark，tez，……）提供数据存储服务 l 重点概念：文件切块，副本存放，元数据...

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文件存储HDFS

文件存储HDFS提供标准的HDFS访问协议，用户无需对现有大数据分析应用做任何修改，即可使用具备无限容量及性能扩展、单一命名空间、高可靠和高可用等特性的分布式文件系统。

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快速使用文件存储HDFS

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