hadoop使用简介

git clone

hadoop源码地址：https://gitee.com/CHNnoodle/hadoop.git
git clone错误：

Filename too long错误，使用git config --global core.longpaths true
git clone https://gitee.com/CHNnoodle/hadoop.git -b rel/release-3.2.2 拉取指定tag版本

hadoop安装包地址：https://mirrors.cloud.tencent.com/apache/hadoop/common/

windows平台下载，https://github.com/cdarlint/winutils替换hadoop对应版本的bin文件

hadoop

• core-site.xml，hadoop中间文件的输出路径

<configuration>
    <property>
      <name>hadoop.tmp.dirname>
      <value>/D:/ruanjian/hadoop/hadoop-3.3.5/datavalue>    
    property>
    <property>
      <name>fs.defaultFSname>
      <value>hdfs://localhost:9000value>
    property>
configuration>

• hdfs-site.xml

<configuration>
    <property>
        <name>dfs.replicationname>
        <value>1value>
    property>
    <property>
        <name>dfs.namenode.name.dirname>
        <value>/D:/ruanjian/hadoop/hadoop-3.3.5/data/namenodevalue>
    property>
    <property>
        <name>dfs.datanode.data.dirname>
        <value>/D:/ruanjian/hadoop/hadoop-3.3.5/data/datanodevalue>
    property>
configuration>

• mapred-site.xml

<configuration>
     <property>
            <name>mapreduce.framework.namename>
             <value>yarnvalue>
    property>
configuration>

• yarn-site.xml

<configuration>
     <property>
        <name>yarn.nodemanager.aux-servicesname>
        <value>mapreduce_shufflevalue>
    property>
    <property>
        <name>yarn.nodemanager.aux-services.mapreduce.shuffle.classname>
        <value>org.apache.hahoop.mapred.ShuffleHandlervalue>
    property>
configuration>

启动hadoop

hdfs namenode -format //格式化节点
sbin/start-all.cmd //启动hadoop

浏览器访问

• 访问集群节点：http://localhost:8088/
  

• 访问HDFS：http://localhost:9870/