单节点Hadoop安装过程(3)

● Hadoop文件配置

配置三个xml文件,分别为:core-site.xml、hdfs-site.xml、mapred-site.xml,配置效果如下所示:

文件:core-site.xml

[root@master conf]# vi core-site.xml

<?xml version="1.0"?>

<?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/configuration.xsl"?> 

<!-- Put site-specific property overrides in this file. -->

<configuration>

<property>

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

<value>hdfs://localhost:9000</value>

</property>

</configuration> 

文件:hdfs-site.xml

[root@master conf]# vi hdfs-site.xml

<?xml version="1.0"?>

<?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

<property>

<name>dfs.replication</name>

<value>1</value>

</property>

</configuration>

文件:mapred-site.xml

[root@master conf]# vi mapred-site.xml

<?xml version="1.0"?>

<?xml-stylesheet type="text/xsl" href="https://www.linuxidc.com/configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

<property>

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

<value>localhost:9001</value>

</property>

</configuration>

● hadoop格式化文件系统

切换到bin目录,找到可执行文件hadoop,执行文件系统格式化操作:

[root@master bin]# hadoop namenode -format

● 启动hadoop

[root@master bin]# ./start-all.sh

starting namenode, logging to /var/local/logs/hadoop-root-namenode-master.hadoop.out

localhost: starting datanode, logging to /var/local/logs/hadoop-root-datanode-master.hadoop.out

localhost: starting secondarynamenode, logging to /var/local/logs/hadoop-root-secondarynamenode-master.hadoop.out

starting jobtracker, logging to /var/local/logs/hadoop-root-jobtracker-master.hadoop.out

localhost: starting tasktracker, logging to /var/local/logs/hadoop-root-tasktracker-master.hadoop.out 

1.1.5 Hadoop测试
[root@master hadoop]# jps

2459 JobTracker

2284 DataNode

2204 NameNode

2860 Jps

2382 SecondaryNameNode

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