HDFS集群搭建 - 黑马程序员技术交流社区

source /etc/profile

4、修改配置文件　　vi /etc/hosts(三台机器)

　　　　增加以下配置

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10.9.1.101   node101

10.9.1.102   node102

10.9.1.103   node103

vi /home/hadoop/hadoop-3.0.0/etc/hadoop/core-site.xml（三台机器）

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<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!--

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License. See accompanying LICENSE file.

-->

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

<configuration>

  <property>

     <name>fs.defaultFS</name>

     <value>hdfs://node101:9000</value>

     <description>HDFS的URI，文件系统://namenode标识:端口</description>

  </property>

  <property>

     <name>hadoop.tmp.dir</name>

     <value>/opt/hadoop</value>

     <description>namenode上传到hadoop的临时文件夹</description>

  </property>

  <property>

       <name>fs.checkpoint.period</name>

       <value>3600</value>

       <description>用来设置检查点备份日志的最长时间</description>

  </property>

</configuration>

vi /home/hadoop/hadoop-3.0.0/etc/hadoop/hdfs-site.xml（三台机器）

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<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!--

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License. See accompanying LICENSE file.

-->

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

<configuration>

 <property>

   <name>dfs.replication</name>

   <value>3</value>

   <description>副本个数，默认配置是3，应小于datanode机器数量</description>

 </property>

 <property>

    <name>dfs.name.dir</name>

    <value>/home/hadoop/hadoop-3.0.0/hdfs/name</value>

    <description>datanode上存储hdfs名字空间元数据</description>

  </property>

 <property>

    <name>dfs.data.dir</name>

    <value>/home/hadoop/hadoop-3.0.0/hdfs/data</value>

    <description>datanode上数据块的物理存储位置</description>

 </property>

</configuration>