官方文档
https://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-common/SingleCluster.html#Standalone_Operation
安装
下载
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| wget https://archive.apache.org/dist/hadoop/common/hadoop-2.7.3/hadoop-2.7.3.tar.gz
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复制到安装目录
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| [zhangsan@node0 ~]$ cp hadoop-2.7.3.tar.gz /opt/bigdata/hadoop/
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解压
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| [zhangsan@node0 ~]$ cd /opt/bigdata/hadoop/
[zhangsan@node0 hadoop]$ tar -zxf hadoop-2.7.3.tar.gz
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创建软连接
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| [zhangsan@node0 hadoop]$ ln -s hadoop-2.7.3 default
[zhangsan@node0 hadoop]$ ll
lrwxrwxrwx. 1 zhangsan zhangsan 12 Feb 14 22:43 default -> hadoop-2.7.3
drwxr-xr-x. 9 zhangsan zhangsan 149 Aug 18 2016 hadoop-2.7.3
-rw-rw-r--. 1 zhangsan zhangsan 214092195 Feb 14 22:43 hadoop-2.7.3.tar.gz
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配置文件
无需修改。
启动
运行示例wordcount程序
读入一个文本文件，通过Hadoop WordCount程序计算词频，最终将结果输出到你指定的目录。
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| [zhangsan@node0 ~]$ echo hello study bigdata > bigdata.txt
[zhangsan@node0 ~]$ cd /opt/bigdata/hadoop/default/bin
[zhangsan@node0 bin]$ ./hadoop jar /opt/bigdata/hadoop/default/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.3.jar wordcount /home/zhangsan/bigdata.txt /home/zhangsan/out/
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| [zhangsan@node0 ~]$ jps
2513 Jps
2479 RunJar
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| [zhangsan@node0 ~]$ cat /home/zhangsan/out/part-r-00000
bigdata 1
hello 1
study 1
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