Hadoop Elephant Tour 006-Install the Hadoop environment

Hadoop Elephant Safari 006- Installing the Hadoop environment

sinom

    > Our hardware computer is running . windows7x64 windows7 installed vmware10 virtual machine, vmware centos6.5 operating system, centos jdk1.6.0_45 centos securecrsecurefx

Everything is available, Hadoop should be installed , but There are many versions of Hadoop, how do we choose?

    From here we can see thathadoop-1.1.xthehbase0.94and thehbase0.96is supported so that we choose herehadoop1.1.xthe current highest version (2014-4-10), i.e.hadoop-1.1.2.tar.gz, this file can be downloaded at the address I provided below:

Official Address: http://archive.apache.org/dist/hadoop/core/hadoop-1.1.2/

1. upload the Hadoop file to CentOS

referring to the method described in the previous section, use the SecureFXPortable.exe in the CentOS Established in /usr/local folder that will hadoop-1.1.2.tar.gz uploaded to /usr/local in

2. Installing Hadoop

referring to the method described in the previous section, use the SecureCRTPortable.exe Login CentOS , into the /usr/local directory.

use the command " tar -xzvf hadoop-1.1.2.tar.gz" decompression hadoop-1.1.2.tar.gz

after the decompression is complete, we use the command " ls" to see the newly created directory hadoop-1.1.2

use the command " mv hadoop-1.1.2 Hadoop" rename the folder name to facilitate reference later

3. Configure the Hadoop Environment Variables

Next put Hadoop configured in the environment variable.

use the command " vi/etc/profile" Edit configuration file

use the shortcut key " i" Enter the file editing mode, the file finally added the following content.

Export JAVA_HOME=/USR/LOCAL/JDK

Export Hadoop_home=/usr/local/hadoop

Export path=.: $HADOOP _home/bin: $JAVA _home/bin: $PATH

use the shortcut key " ESC" exit file edit mode, use"Shift"and": "Key combination to enter command mode, enter command"Wq "Save and exit.

Here's an explanation: " Export "is a keyword that is used to set environment variables. We set up two environment variables, one is hadoop_home,

one is PATH . For a reference to an environment variable, use"$", a connection between multiple environment variables, using ":".

use the command " Source /etc/profile" makes the above configuration effective immediately

use the command " Hadoop version" detects if Hadoop is configured successfully ! " See the following tips, congratulations, the configuration is successful ~!~

Hadoop Elephant Tour 006-Install the Hadoop environment