Hadoop: 搭建Hadoop cluster环境

先把我的配置文件贴上来，详细解释以后再弄：
➜ hadoop vim hadoop-env.sh

# The java implementation to use.
export JAVA_HOME=/usr/lib/jvm/sun_jdk

```
➜  hadoop  vim core-site.xml
```
```
<configuration>
```
```
<property>
```
```
<name>fs.defaultFS</name>
```
```
<value>hdfs://master:9000</value>
```
```
</property>
```
```
<property>
```
```
<name>hadoop.tmp.dir</name>
```

<value>/home/yuliang/bigdata/hadoop/tmp/</value>

<description>A base for other temporary directories</description>

```
</property>
```
```
<property>
```
```
<name>io.file.buffer.size</name>
```
```
<value>131072</value>
```
```
</property>
```
```
</configuration>
```
```
 
```
```
 
```
```
➜  hadoop  vim hdfs-site.xml
```
```
<configuration>
```
```
<property>
```
```
<name>dfs.namenode.name.dir</name>
```

<value>file:/home/yuliang/bigdata/hadoop/name</value>

```
<final>true</final>
```
```
</property>
```
```
<property>
```
```
<name>dfs.datanode.data.dir</name>
```

<value>file:/home/yuliang/bigdata/hadoop/data</value>

```
<final>true</final>
```
```
</property>
```
```
<property>
```
```
<name>dfs.replication</name>
```
```
<value>2</value>
```
```
<final>true</final>
```
```
</property>
```
```
<property>
```
```
<name>dfs.webhdfs.enabled</name>
```
```
<value>true</value>
```
```
</property>
```
```
</configuration>
```
```
 
```
```
➜  hadoop  vim yarn-site.xml
```
```
<property>
```

<name>yarn.nodemanager.aux-services</name>

```
<value>mapreduce_shuffle</value>
```
```
</property>
```
```
<property>
```

<name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>

<value>org.apache.hadoop.mapred.ShuffleHandler</value>

```
</property>
```
```
<property>
```

<name>yarn.app.mapreduce.am.log.level</name>

```
<value>DEBUG</value>
```
```
</property>
```
```
<property>
```

<name>yarn.resourcemanager.resource-tracker.address</name>

```
<value>master:8025</value>
```
```
</property>
```
```
<property>
```

<name>yarn.resourcemanager.scheduler.address</name>

```
<value>master:8030</value>
```
```
</property>
```
```
<property>
```

<name>yarn.resourcemanager.address</name>

```
<value>master:8050</value>
```
```
</property>
```
```
</configuration>
```
```
 
```
```
➜  hadoop  vim mapred-site.xml
```
```
<configuration>
```
```
<property>
```
```
<name>mapreduce.framework.name</name>
```
```
<value>yarn</value>
```
```
</property>
```
```
</configuration>
```

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