hadoop配置文件

(1)配置$HADOOP_HOME/conf/hadoop-env.sh

切换到Hadoop的安装路径找到hadoop-0.20.2下的conf/hadoop-env.sh文件

将：# export JAVA_HOME=/usr/lib/j2sdk1.5-sun

改为：export JAVA_HOME=/usr/lib/jvm/java-6-openjdk

(2) 配置$HADOOP_HOME/conf/core-site.xml

切换到Hadoop的安装路径找到hadoop-0.20.2下的conf/core-site.xml文件

<configuration>

<property>

<name>fs.default.name</name>

<value>hdfs://192.168.0.118:9000</value>

</property>

<property>

<name>hadoop.tmp.dir</name>

<value>/home/hadoop/tmp</value>

</property>

-- 配置第二名称节点

<property>

<name>fs.checkpoint.dir</name>

<value>/home/hadoop/secondname</value>

</property>

-- 设置回收站保留时间

<property>

<name>fs.trash.interval</name>

<value>10080</value>

<description>

Number of minutes between trash checkpoints. If zero, the trash feature is disabled

</description>

</property>

</configuration>

(3) 配置$HADOOP_HOME/conf/hdfs-site.xml

切换到Hadoop的安装路径找到hadoop-0.20.2下的conf/hdfs-site.xml文件内容如下：

<configuration>

<property>

<name>dfs.name.dir</name>

<value>/home/hadoop/name</value>

</property>

<property>

<name>dfs.data.dir</name>

<value>/home/hadoop/data</value>

</property>

<property>

<name>dfs.replication</name>

<value>2</value>

</property>

<property>

<name>dfs.http.address</name>

<value>192.168.0.118:50070</value>

</property>

<property>

<name>dfs.secondary.http.address</name>

<value>192.168.0.118:50070</value>

</property>

</configuration>

(4) 配置$HADOOP_HOME/conf/mapred-site.xml

切换到hadoop的安装路径找到hadoop-0.20.2下的conf/mapred-site.xml文件内容如下：

<configuration>

<property>

<name>mapred.local.dir</name>

<value>/home/hadoop/temp</value>

</property>

<property>

<name>mapred.job.tracker</name>

<value>192.168.0.118:9001</value>

</property>

<property>

<name>mapred.map.tasks</name>

<value>7</value>

</property>

<property>

<name>mapred.tasktracker.map.tasks.maximum</name>

<value>4</value>

</property>

<property>

<name>mapred.tasktracker.reduce.tasks.maximum

</name>

<value>3</value>

</property>

<property>

<name>mapred.child.java.opts</name>

<value>-Xmx512m</value>

</property>

</configuration>