First, download
Download Address: http://apache.etoak.com/hadoop/common/
Open will find different versions, I choose here is: hadoop-1.0.3.tar.gz
Download location to:/data/software
Second, the installation
Using the command tar to decompress the installation, the results are as follows:
Shell code [root@sc-026 ~]# cd/data/software/[root@sc-026 software]# tar xvf hadoop-1.0.3.tar.gz
If the JAVA_HOME environment variable already points to a Java installation, you do not need to configure it.
Shell code [root@sc-026 software]# echo $JAVA _home/usr/java/jdk1.7.0_01
Otherwise, edit ... /conf/hadoop-env.sh file to set java_home variable
Shell code [root@sc-026 software]# cd hadoop-1.0.3/conf [root@sc-026 conf]# vim hadoop-env.sh
This is edited in this computer as follows:
Shell Code Export JAVA_HOME=/USR/JAVA/JDK1.7.0_01 Export hadoop_home=//data/software/hadoop-1.0.3 export path= $PATH: $HA Doop_home/bin
: Wq save, exit.
Third, the configuration
The various components of Hadoop can be configured with XML files.
Core-site.xml: Used to configure the properties of the common component;
Hdfs-site.xml: Used to configure HDFS properties;
Mapred-site.xml: Used to configure mapreduce properties.
These configuration files are in the following path:
Shell Code [root@sc-026 conf]# ls capacity-scheduler.xml hadoop-env.sh~ mapred-site.xml Configuration.xsl hadoop-metrics2.properties masters Core-site.xml hadoop-policy.xml slaves core-site.xml~ hdfs-site.xml ssl-client.xml.example fair-scheduler.xml log4j.properties ssl-server.xml.example hadoop-env.sh mapred-queue-acls.xml taskcontroller.cfg
Open 3 files in turn through Vim, configured as follows:
XML code [root@sc-026 conf]# vim core-site.xml <?xml version= "1.0"?> <?xml-stylesheet type= "text/xsl" href= "con Figuration.xsl "?> <!--put the site-specific property overrides into this file. -->
<configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost</value> </property> </configuration>
XML code [root@sc-026 conf]# vim hdfs-site.xml <?xml version= "1.0"?> <?xml-stylesheet type= "text/xsl" href= "Co Nfiguration.xsl "?>
