How to check whether CDH5 has Trash enabled
In this article, the editor introduces in detail "how to check whether CDH5 opens Trash". The content is detailed, the steps are clear, and the details are handled properly. I hope this "how to check whether CDH5 is enabled or not to open Trash" article can help you solve your doubts.
Check the configuration of hdfs in CDH, whether trash is enabled and retention time:
Test:
1. Create test.txt
[root@sht-sgmhadoopnn-01 ~] # vi / tmp/test.txt
two。 Create a folder
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-mkdir / testdir
You have new mail in / var/spool/mail/root
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-ls /
Found 4 items
Drwxr-xr-x-hdfs supergroup 0 2016-02-04 00:38 / system
Drwxr-xr-x-root supergroup 0 2016-02-19 08:17 / testdir
Drwxrwxrwt-hdfs supergroup 0 2016-02-10 16:04 / tmp
Drwxr-xr-x-hdfs supergroup 0 2016-02-10 16:02 / user
3.put file to hadoop
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-put / tmp/test.txt / testdir
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-ls / testdir
Found 1 items
-rw-r--r-- 3 root supergroup 10 2016-02-19 08:18 / testdir/test.txt
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-cat / testdir/test.txt
You have mail in / var/spool/mail/root
4. Delete folder testdir
[root@sht-sgmhadoopnn-01] # hadoop fs-rm-r / testdir
08:27:05 on 16-02-19 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 1440 minutes, Emptier interval = 0 minutes.
Moved: 'hdfs://sgm-nameservice/testdir' to trash at: hdfs://sgm-nameservice/user/root/.Trash/Current
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-ls /
Found 3 items
Drwxr-xr-x-hdfs supergroup 0 2016-02-04 00:38 / system
Drwxrwxrwt-hdfs supergroup 0 2016-02-10 16:04 / tmp
Drwxr-xr-x-hdfs supergroup 0 2016-02-10 16:02 / user
You have mail in / var/spool/mail/root
5. View the Recycle Bin
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-ls / user/root/.Trash/Current
Found 1 items
Drwxr-xr-x-root supergroup 0 2016-02-19 08:18 / user/root/.Trash/Current/testdir
6. Restore folder
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-mv / user/root/.Trash/Current/testdir /
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-ls /
Found 4 items
Drwxr-xr-x-hdfs supergroup 0 2016-02-04 00:38 / system
Drwxr-xr-x-root supergroup 0 2016-02-19 08:17 / testdir
Drwxrwxrwt-hdfs supergroup 0 2016-02-10 16:04 / tmp
Drwxr-xr-x-hdfs supergroup 0 2016-02-10 16:02 / user
[root@sht-sgmhadoopnn-01 ~] # hadoop fs-cat / testdir/test.txt
After reading this, the article "how to check whether CDH5 enables Trash" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it yourself. If you want to know more about related articles, welcome to follow the industry information channel.
