hadoop安装配置——伪分布模式

Posted 2021-04-13 请Java和Android开发者吃点干货

1. 安装

这里以安装hadoop-0.20.2为例

先安装java,参考这个

去着下载hadoop

解压

tar -xzf hadoop-0.20.2

 

2. 配置

修改环境变量

vim ~/.bashrc
export HADOOP_HOME=/home/rte/hadoop-0.20.2   #这里为实际hadoop解压的目录位置export PATH=$PATH:$HADOOP_HOME/bin
source ~/.bashrc

配置hadoop-env.sh

vim conf/hadoop-env.shexport JAVA_HOME=/home/rte/Software/java/jdk1.6.0_27

配置conf/core-site.xml、conf/hdfs-site.xml、conf/mapred-site.xml文件

文件：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://localhost:9000</value>
    </property></configuration>

文件：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>localhost:9001</value> 
        </property></configuration>

文件：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.replication</name>
                <value>2</value>
        </property></configuration>

 

3. 开启关闭

通过NameNode格式化HDFS文件系统

cd hadoop-0.20.2/conf
hadoop namenode -format

开启hadoop

cd hadoop-0.20.2/binsh start-all.sh

通过jps命令检查期望的hadoop进程是否运行

关闭hadoop

cd hadoop-0.20.2/binsh stop-all.sh

 

4. 参考

Running Hadoop on Ubuntu Linux (Single-Node Cluster)

hadoop三个配置文件的参数含义说明

hadoop安装配置

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