Hadoop 常用shell命令
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Hadoop 常用shell命令
1. 文件操作
[root@server4 logs]
Found 2 items
drwxr-xr-x - root supergroup 0 2018-12-18 11:25 /hbase
drwxr-xr-x - root supergroup 0 2018-12-22 08:24 /input
- 创建文件夹
hadoop fs -mkdir /input
[root@server4 logs]
[root@server4 logs]
Found 3 items
drwxr-xr-x - root supergroup 0 2018-12-18 11:25 /hbase
drwxr-xr-x - root supergroup 0 2018-12-22 08:24 /input
drwxr-xr-x - root supergroup 0 2018-12-22 08:27 /test
[root@server4 logs]
18/12/22 08:28:12 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 0 minutes, Emptier interval = 0 minutes.
Deleted /test
[root@server4 logs]
Found 2 items
drwxr-xr-x - root supergroup 0 2018-12-18 11:25 /hbase
drwxr-xr-x - root supergroup 0 2018-12-22 08:24 /input
[root@server4 temp]
[root@server4 temp]
Found 1 items
-rw-r--r-- 3 root supergroup 108 2018-12-22 08:32 /input/data.txt
[root@server4 temp]
hadoop is a good platform to analyze big data in disk.
spark is a perfet tool to deal with big data in RAM.