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The hadoop development cycle is generally:1) Prepare the development and deployment Environment2) Write Mapper and reducer2)Unit Test3)Compile and Package
4) submit jobs and search results
Before using hadoop to process big data, you must first deploy the running and development environments. The following describes the installation process of the basic envir
Hadoop installation memo
Refer to Liu Peng's "Practical Hadoop" and follow the instructions in hadoop 0.20.2.
Practical Hadoop: open a shortcut to cloud computing pdf hd scan Version Download
First, understand several background processes in
Today is finally the hadoop2.4 of the entire development environment, including the Windows7 on the Eclipse connection Hadoop,eclipse configuration and test made irritability of the ~ ~First on a successful picture, Hadoop's pseudo-distributed installation configuration, just follow the steps, a little basic basically no problem. The eclipse configuration took a very long time to fix, and there were unexpe
First, the environment
Operating system: CentOS 6.5 64-bit operating system
Note: Hadoop2.0 above uses the JDK environment is 1.7,linux comes with the JDK to unload, reinstall
Download Address: http://www.oracle.com/technetwork/java/javase/downloads/index.html
Software version: hadoop-2.3.0-cdh5.1.0.tar.gz, zookeeper-3.4.5-cdh5.1.0.tar.gz
Download Address: http://archive.cloudera.com/cdh5/cdh/5/
Start the install
First, IntroductionAfter the completion of the storm's environment configuration, think about the installation of Hadoop, online tutorial a lot of, but not a particularly suitable, so in the process of installation still encountered a lot of trouble, and finally constantly consult the data, finally solved the problem, feeling is very good, the following nonsense
. illegalargumentexception: The servicename: mapreduce. shuffle set in yarn. nodemanager. aux-services is invalid
/*************************************** *********************
Shutdown_msg: Shutting Down nodemanager at slave1.hadoop/192.168.1.3
**************************************** ********************/
Ii. Problem Solving
Found that yarn-site.xml configuration does not meet the requirements. Modify as follows:
Incorrect Configuration:
Only recently began to touch Hadoop, the first thing to do is to install Hadoop, before you install Hadoop, you need to make the following preparationsA Linux environment, I installed CentOS using VMware's virtual machine environmentthis please yourself Baidu a bit, it is really too bigLinux installation package for JD
Standalone installation is mainly used for Program Logic debugging. The installation steps are basically distributed, including environment variables, main Hadoop configuration files, and SSH configuration. The main difference lies in the configuration file: slaves configuration needs to be modified. In addition, if dfs. replication is greater than 1 in Distribut
128 and press Enter.Copy the public key/root/. ssh/id_rsa.pub to the datanode server as follows:Root@192.168.149.129 for ssh-copy-id-I. ssh/id_rsa.pubRoot@192.168.149.130 for ssh-copy-id-I. ssh/id_rsa.pub
Iii. Java installation and configurationTar-xvzf jdk-7u25-linux-x64.tar.gz mkdir-p/usr/java/; mv/jdk1.7.0 _ 25/usr/java.After installation and configuration of java environment variables, add the follow
Tags: get java NPE View tables system XML validation 1.21. Preparing the Linux environment1.1 Shutting down the firewall#查看防火墙状态Service Iptables Status#关闭防火墙Service Iptables Stop#查看防火墙开机启动状态Chkconfig iptables--list#关闭防火墙开机启动Chkconfig iptables off1.2 Modifying sudoSu RootVim/etc/sudoersAdd execute permissions to Hadoop usersHadoop all= (All) allTo close the Linux server's graphical interface:Vi/etc/inittab1.3 Restarting LinuxReboot2. Installing the Jav
same name.) )Let the user gain administrator privileges:[Email protected]:~# sudo vim/etc/sudoersModify the file as follows:# User Privilege SpecificationRoot all= (All) allHadoop all= (All) allSave to exit, the Hadoop user has root privileges.3. Install JDK (use Java-version to view JDK version after installation)Downloaded the Java installation package and ins
Ubuntu In the environment Eclipse the installation and Hadoop configuration of the pluginFirst, installation of EclipseIn Ubuntu desktop mode, click Ubuntu Software Center in the taskbar, search for Eclipse in the search barNote: The installation process requires the user password to be entered.Ii. Configuration of Ecl
Mac OS hadoop mahout Installation
1. Download hadoop, mahout:
You can download it directly from labs.renren.com/apache-#/hadoopand labs.renren.com/apache-#/mahout.
2. Configure the hadoop configuration file:
(1) core-site.xml:
(2) mapred-site.xml
(3) hdfs-site.xml
(4) Add the following configuration information at t
ObjectiveThe purpose of this document is to help you quickly complete Hadoop installation and use on a single machine so you can experience the Hadoop Distributed File System (HDFS) and map-reduce frameworks, such as running sample programs or simple jobs on HDFS. PrerequisiteSupport Platform
Gnu/linux is a platform for product development and operation.
authenticationPermissions are similar to Linux, and if a Linux user Wangwei to create a file using the Hadoop command, the file in HDFs is the owner of Wangwei; HDFs does not do password authentication, such a benefit is fast, or each read and write to verify the password,HDFS storage data is generally not very high security data. HDFs theory ended.iii. HDFs Installation and Deployment1. Download
: hadoopinstal/doc/core-default.html
2.2.2 set the hdfs-site.xml as follows:
Detailed configuration item reference: hadoopinstal/doc/hdfs-default.html
2.2.3 set mapred-site.xml, as follows:
Detailed configuration item reference: hadoopinstal/doc/mapred-default.html
Iv. Format hadoop run hadoop
Run the following command on the console: hadoop nam
Hadoop remote Client installation configuration
Client system: ubuntu12.04
Client User name: Mjiang
Server username: Hadoop download Hadoop installation package, guaranteed and server version consistent (or the Hadoop
Hadoop-2.6 cluster Installation
Basic Environment
Sshd Configuration
Directory:/root/. ssh
The configuration involves four shells.
1.Operation per machine
Ssh-keygen-t rsa
Generate an ssh key. The generated file is as follows:
Id_rsa
Id_rsa.pub
. Pub is the public key, and No. pub is the private key.
2.Operation per machine
Cp id_rsa.pub authorized_keys
Authorized_keys Error
3.Copy and distrib
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