hadoop on nitrous.io

Prepare SSH

ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa

cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

chmod 600 ~/.ssh/authorized_keys

Configuration

vim /home/action/software/hadoop-1.2.1/conf/hadoop-env.sh
export JAVA_HOME=/usr/lib/jvm/java-7-oracle

bin/hadoop namenode -format

bin/hadoop fs -mkdir input
bin/hadoop fs -put conf input
bin/hadoop fs -cp conf/*.xml input 

bin/start-all.sh

bin/hadoop jar hadoop-examples-1.2.1.jar grep input output 'dfs[a-z.]+'
bin/hadoop fs -rmr output

bin/hadoop jar hadoop-examples-1.2.1.jar wordcount input output
bin/hadoop fs -rmr output

bin/stop-all.sh

core-site.xml

<configuration>
    <property>
     <name>fs.default.name</name>
     <value>hdfs://localhost:9000</value>
    </property>
　　<property>
　　　　<name>hadoop.tmp.dir</name>
　　　　<value>/home/action/tmp</value>
　　</property>
</configuration>

hdfs-site.xml

<configuration>
<property>
  <name>dfs.replication</name>
  <value>1</value>
 </property>
</configuration>

mapred-site.xml

<configuration>
 <property>
   <name>mapred.job.tracker</name>
   <value>localhost:9001</value>
 </property>
</configuration>

“hadoop.tmp.dir” must be set, otherwise it will throw error

admin interface

http://localhost:50030/ - Hadoop 管理介面
http://localhost:50060/ - Hadoop Task Tracker 状态
http://localhost:50070/ - Hadoop DFS 状态

Reference

angelosun.iteye.com
shaurong.blogspot.hk
blog.csdn.net