每日总结

集群基本测试

(1)上传文件到集群

  • 上传小文件

[atguigu@hadoop102 ~]$ hadoop fs -mkdir /input

[atguigu@hadoop102 ~]$ hadoop fs -put $HADOOP_HOME/wcinput/word.txt /input

  • 上传大文件

[atguigu@hadoop102 ~]$ hadoop fs -put  /opt/software/jdk-8u212-linux-x64.tar.gz  /

(2)上传文件后查看文件存放在什么位置

  • 查看HDFS文件存储路径

[atguigu@hadoop102 subdir0]$ pwd

/opt/module/hadoop-3.1.3/data/dfs/data/current/BP-1436128598-192.168.10.102-1610603650062/current/finalized/subdir0/subdir0

  • 查看HDFS在磁盘存储文件内容

[atguigu@hadoop102 subdir0]$ cat blk_1073741825

hadoop yarn

hadoop mapreduce

atguigu

atguigu

(3)拼接

-rw-rw-r--. 1 atguigu atguigu 134217728 5月  23 16:01 blk_1073741836

-rw-rw-r--. 1 atguigu atguigu   1048583 5月  23 16:01 blk_1073741836_1012.meta

-rw-rw-r--. 1 atguigu atguigu  63439959 5月  23 16:01 blk_1073741837

-rw-rw-r--. 1 atguigu atguigu    495635 5月  23 16:01 blk_1073741837_1013.meta

[atguigu@hadoop102 subdir0]$ cat blk_1073741836>>tmp.tar.gz

[atguigu@hadoop102 subdir0]$ cat blk_1073741837>>tmp.tar.gz

[atguigu@hadoop102 subdir0]$ tar -zxvf tmp.tar.gz

(4)下载

[atguigu@hadoop104 software]$ hadoop fs -get /jdk-8u212-linux-x64.tar.gz ./

(5)执行wordcount程序

[atguigu@hadoop102 hadoop-3.1.3]$ hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar wordcount /input /output

posted @ 2021-10-26 14:34  小萌新一枚lll  阅读(41)  评论(0编辑  收藏  举报