Hadoop is a free, Java-based programming framework that supports the processing of large data sets in a distributed computing environment. It is part of the Apache project sponsored by the Apache Software Foundation.You can use A10 Cubieboards to build Hadoop cluster base on Lubuntu(v1.04) image which was integrated jdk-1.8 armhf.Need to do configuration: JDK environment, slaves and master ssh sever, hadoop configuration parameters.

Router provide cluster with a lan

hadoop_0.20.203 you can get it from here http://hadoop.apache.org/common/releases.html

Lubuntu 12.04v1.04(JDK-1.8) 、Power and network cables

1 master 3slaves both work in wlan network ,LAN connection between the nodes can ping each other.

Create a user

sudo addgroup hadoop
sudo adduser -ingroup hadoop hadoop
sudo vim ./etc/sudoers
add:hadoop ALL=(ALL:ALL) ALL

Host&hostname

sudo vim ./etc/hosts
add:
192.168.1.40 master
192.168.1.41 slave1
192.168.1.42 slave2
192.168.1.43 slave3
sudo vim ./etc/hostname
cubieboard -->master

You should do the same things.E.for slave1 node .

add user

sudo addgroup hadoop
sudo adduser -ingroup hadoop hadoop
sudo vim ./etc/sudoers
add:hadoop ALL=(ALL:ALL) ALL

Host&hostname

sudo vim ./etc/hosts
add:
192.168.1.40 master
192.168.1.41 slave1
sudo vim ./etc/hostname
cubieboard -->slave1

For each node

sudo vim ./etc/network/interfaces
add
#auto lo
# iface lo inet loopback
#iface lo eth0 dhcp
auto eth0
iface eth0 inet static
address 192.168.1.40
gateway 192.168.1.1
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255

sudo vim ./etc/resolvconf/resolv.conf.d/base
add this:

nameserver 192.168.1.1

Stay here to sure all cbs have an user with Static IP which can ping each other.

master ←-no passwd–>slave1 master ←-no passwd–>slave2 master ←-no passwd–>slave3 B–no passwd–>A A

ssh-keygen –t rsa –P ''
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys
ssh localhost
scp ~/.ssh/id_rsa.pub hadoop@192.168.1.40:~/

B

mkdir ~/.ssh
chmod 700 ~/.ssh
cat ~/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys
rm –r ~/id_rsa.pub

hadoop@master:~$
hadoop@master:~$ ssh slave1
Welcome to Linaro 13.04 (GNU/Linux 3.4.43+ armv7l)

 * Documentation:  https://wiki.linaro.org/
Last login: Thu Oct 17 03:38:36 2013 from master
hadoop@slave1:~$

#export JAVA_HOME=/lib/jdk

You should edit core-site.xml hdfs-site.xml mapred-site.xml on /hadoop/hadoop_0.20.203_master/conf

core-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://master:9000</value>
</property>
</configuration>

hdfs-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>dfs.name.dir</name>
<value>/usr/local/hadoop/datalog1,/usr/local/hadoop/datalog2</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/usr/local/hadoop/data1,/usr/local/hadoop/data2</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>

mapred-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>master:9001</value>
</property>
</configuration>

bin/hadoop namenode -format

bin/hadoop dfsadmin -report

bin/start-all.sh // start

bin/stop-all.sh // stop

./bin/hadoop jar hadoop-examples-0.20.203.0.jar pi 100 100 //Calculates PI

http://www.cnblogs.com/xia520pi/archive/2012/05/16/2503949.html