Configuring Hadoop under Linux

First to download the Hadoop package, version Select 1.2.1, for: HTTP://MIRRORS.CNNIC.CN/APACHE/HADOOP/COMMON/HADOOP-1.2.1/

　　

Here can download hadoop-1.2.1-tar.gz including the source code or hadoop-1.2.1-bin.tar.gz execution package does not include the source code, two file size is almost exactly one-fold relationship

After downloading through TAR-XZVF hadoop-1.2.1.tar.gz decompression, extracted and placed in our designated directory, and then into the Conf directory to start the configuration file

The main is to configure hadoop-env.sh, Core-site.xml, Hdfs-site.xml, mapred-site.xml four files, using VIM to open the configuration

First, hadoop.env.sh.

　　

Java_home this place to remove the note, replace it with the JDK directory, save the exit

Then Core-site.xml, add the code directly between the <configuration> tags

　　

The first attribute is the working directory of Hadoop, the/hadoop, the second is the Dfs File system node directory, and the third is the local server port number is 9000

Hdfs-site.xml

1 <Configuration>2      < Property>3          <name>Dfs.replication</name>4          <value>1</value>5      </ Property>6 </Configuration>

　　Mapred-site.xml

1 <Configuration>2      < Property>3          <name>Mapred.job.tracker</name>4          <value>localhost:9001</value>5      </ Property>6 </Configuration>

　　After saving, you can add Hadoop to the environment variable or not add it,

Then click on the previously said configuration SSH free Login

Finally, the process of bin/start-all.sh starting Hadoop under Hadoop

At this time access http://localhost:50030 or http://localhost:50070 can open the page normally proves the configuration is successful

Then enter the command JPS return to see the open process and port, the configuration of Hadoop stand-alone mode is successful.

　　

　　

Configuring Hadoop under Linux