hadoop 50070

:$ bin/hadoop Namenode-format Start the Hadoop daemon:$ bin/start-all.sh The log of the HADOOP daemon is written to the ${hadoop_log_dir} directory (default is ${hadoop_home}/logs). Browse the network interfaces for Namenode and Jobtracker, with their addresses by default: namenode-http://localhost:50070/

java_home=/usr/java/jdk1.6.0_452. Password-free SSH settingsThe command is as followsssh-keygen-t RSAthen always enter, the last key will be saved in the ~/.ssh, and then enter the. SSH directoryexecute the following commandCP id_rsa.pub Authorized_keysFinally, using SSH localhost to verify the success, if you do not enter the password that means success3. Extracting HadoopI put the Hadoop installation package in the/tmp directory ahead of time and u

Configuring Remote Logins1) Set up Hadoop on your own Linux machine, please refer to the detailed procedure: http://www.cnblogs.com/stardjyeah/p/4641554.html2) Modify the Hosts file for Linux# vim/etc/hostsAdded in the bottom line of the Hosts file, in the following format:The first part: Network IP address.Part two: hostname. Domain name, note that there is a half-width point between the host name and the domain name.The second part: hostname (hostna

一、环境配置 安装虚拟机vmware，并在该虚拟机机中安装CentOS 6.4； 修改hostname(修改配置文件/etc/sysconfig/network中的HOSTNAME=hadoop),修改IP到主机名的映射(vi /etc/hosts ,添加 127.0.0.1 hadoop); 按照JDK,下载jdk1.7.0_60并解压到/soft目录中，然后在/etc/profile中添加 export JAVA_HOME=/soft/jdk1.7.0_60 和 export PATH = $PATH:$JAVA_HOME/bin 保存退出，source /etc/profile 关闭防火墙 ， 查看防护墙状态：service iptables status 看到没有关闭时执行：service iptables stop ，为了防止重启后防火墙再次启动再执行:chkconfig

After successfully setting up the hadoop environment, all hadoop components work properly. After restarting hadoop several times, it is found that datanode cannot work normally. When hadoop's background http: // localhost: 50030 and http: // localhost: 50070 are enabled, it is found that lives nodes is 0. View the lo

name Node,task tracker know Job tracker. So modify the Conf/core-site.xml on Hadoopdatanode1 and Hadoopdatanode2, respectively: and Conf/mapred-site.xml: Format name Node :Execute on Hadoopnamenode: Hadoop Namenode-format start Hadoop :First, execute the following command on Hadoopnamenode to start all name node,

This article address: http://blog.csdn.net/kongxx/article/details/6891761 Hadoop can be run on a single node in so-called pseudo distributed mode, at which time every Hadoop daemon runs as a separate Java process, and the configuration and operation of this mode of operation is as follows: The installation and testing of Hadoop can refer to the installation and s

Single-machine mode requires minimal system resources, and in this installation mode, Hadoop's Core-site.xml, Mapred-site.xml, and hdfs-site.xml configuration files are empty. By default, the official hadoop-1.2.1.tar.gz file uses the standalone installation mode by default. When the configuration file is empty, Hadoop runs completely locally, does not interact with other nodes, does not use the

Once Hadoop is installed, you will often be prompted with a warning: WARN util. nativecodeloader:unable to load Native-hadoop library for your platform ... Using Builtin-java classes where applicableSearched a lot of articles, all say is related to the system bit number, I use CentOS 6.5 64-bit operating system. The first two days in the Docker image to find a step to solve the problem, the pro tried

Hadoop uses Eclipse in Windows 7 to build a Hadoop Development Environment Some of the websites use Eclipse in Linux to develop Hadoop applications. However, most Java programmers are not so familiar with Linux systems. Therefore, they need to develop Hadoop programs in Windows, it summarizes how to use Eclipse in Wind

Although I have installed a Cloudera CDH cluster (see http://www.cnblogs.com/pojishou/p/6267616.html for a tutorial), I ate too much memory and the given component version is not optional. If only to study the technology, and is a single machine, the memory is small, or it is recommended to install Apache native cluster to play, production is naturally cloudera cluster, unless there is a very powerful operation.I have 3 virtual machine nodes this time. Each gave 4G, if the host memory 8G, can ma

Hadoop. tmp. DIR is the basic configuration that the hadoop file system depends on. Many Paths depend on it. Its default location is under/tmp/{$ user}, but the storage in the/tmp path is insecure, because the file may be deleted after a Linux restart. After following the steps in the Single Node setup section of hadoop getting start, the pseudo-distributed fil

/hadoop//Otherwise SSH will deny accessModify/etc/profile#set Hadoop EnvironmentExport Hadoop_home=/opt/hadoopExport Path=.:${java_home}/bin:${hadoop_home}/bin: $PATHTest is configured successfullyHadoop version3. Pseudo-distributed configuration Cd/opt/hadoopHDFs configuration:Vim Etc/hadoop/core-site.xmlVim Etc/hadoop