环境要求 说明:本文档为wordcount的mapreduce job编写及执行文档. 操作系统:Ubuntu14 x64位 Hadoop:Hadoop 2.7.0 Hadoop官网:http://hadoop.apache.org/releases.html MapReduce參照官网步骤: http://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTu…

##################### Centos6.4VM_01_os.rar ################################################准备工作/opt /opt/modules 软件安装目录 /opt/softwares 软件包(tar.bin.zip) /opt/tools(eclipse等) /opt/data(测试数据)/home/hadoop(工具和数据) ##################### Centos6.4VM_01_os.r…

由于下载的是hadoop的最新版,网上各种杂七杂八的东西都不适用.好在官网上说的也够清楚了.如果有人看这篇文章的话,最大的忠告就是看官网. 官网2.6.0的安装教程:http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-common/SingleCluster.html hdfs指令:http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-common…

1.检查网络配置[root@hadoop-master ~]# cat /etc/sysconfig/networkNETWORKING=yesHOSTNAME=hadoop-masterGATEWAY=192.168.126.2 [root@hadoop-master ~]# cat /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localh…

hadoop-2.5.0\share\hadoop\common  所有jar,hadoop-2.5.0\share\hadoop\common\lib  所有jar,hadoop-2.5.0\share\hadoop\hdfs  所有jar hadoop-2.5.0\share\hadoop\mapreduce  所有jar hadoop-2.5.0\share\hadoop\yarn  所有jar…

[hadoop@LexiaofeiMaster hadoop-2.6.0]$ start-dfs.shStarting namenodes on [localhost]localhost: starting namenode, logging to /opt/modules/hadoop-2.6.0/logs/hadoop-hadoop-namenode-LexiaofeiMaster.outLexiaofeiMaster: starting datanode, logging to /opt/…

问题导读: 1.编译源码前需要安装哪些软件? 2.安装之后该如何设置环境变量? 3.为什么不要使用JDK1.8? 4.mvn package -Pdist -DskipTests -Dtar的作用是什么? 1. 前言 Hadoop-2.4.0的源码目录下有个BUILDING.txt文件,它介绍了如何在Linux和Windows下编译源代码,本文基本是遵照BUILDING.txt指示来操作的,这里再做一下简单的提炼. 第一次编译要求能够访问互联网,Hadoop的编译依赖非常多的东西,一定要保证机器…

[hadoop@LexiaofeiN1 ~]$ hdfs dfs -ls /output/grep[hadoop@LexiaofeiN1 ~]$ hdfs dfs -rm -R /output/grep[hadoop@LexiaofeiN1 ~]$ hdfs dfs -ls /output/grep[hadoop@LexiaofeiN1 ~]$ cd /opt/modules/hadoop2.6[hadoop@LexiaofeiN1 hadoop2.6]$ ./bin/hadoop jar ./…

############################################################# hadoop "util.NativeCodeLoader: Unable to load native-hadoop library for your platform" hadoop安装完以后,经常会提示以下警告: WARN util.NativeCodeLoader: Unable to load native-hadoop library for your…

start-dfs.sh start-yarn.sh 1.检查hdfs hdfs dfs -ls / http://localhost:50070 2.运行例子程序 hdfs dfs -ls / hdfs dfs -mkdir -R /example/grep/input hdfs dfs -mkdir -R /example/grep/output hdfs dfs -copyFromLocal  /etc/profile  /example/grep/input hdfs dfs -rm -…