怎么查看CDH5是否开启Trash

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查看CDH 的hdfs的配置,是否开启trash 及 保留时间:

测试:

创建test.txt

[root@sht-sgmhadoopnn-01 ~]# vi /tmp/test.txt

创建文件夹

1. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -mkdir /testdir
   

2. You have new mail in /var/spool/mail/root
   

3. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /
   

4. Found 4 items
   

5. drwxr-xr-x - hdfs supergroup 0 2016-02-04 00:38 /system
   

6. drwxr-xr-x - root supergroup 0 2016-02-19 08:17 /testdir
   

7. drwxrwxrwt - hdfs supergroup 0 2016-02-10 16:04 /tmp
   

8. drwxr-xr-x - hdfs supergroup 0 2016-02-10 16:02 /user
   

put 文件到hadoop

1. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -put /tmp/test.txt /testdir
   

2. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /testdir
   

3. Found 1 items
   

4. -rw-r--r-- 3 root supergroup 10 2016-02-19 08:18 /testdir/test.txt
   

5. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -cat /testdir/test.txt
   

6. You have mail in /var/spool/mail/root
   

删除文件夹testdir

1. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -rm -r /testdir
   

2. 16/02/19 08:27:05 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 1440 minutes, Emptier interval = 0 minutes.
   

3. Moved: 'hdfs://sgm-nameservice/testdir' to trash at: hdfs://sgm-nameservice/user/root/.Trash/Current
   

4. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /
   

5. Found 3 items
   

6. drwxr-xr-x - hdfs supergroup 0 2016-02-04 00:38 /system
   

7. drwxrwxrwt - hdfs supergroup 0 2016-02-10 16:04 /tmp
   

8. drwxr-xr-x - hdfs supergroup 0 2016-02-10 16:02 /user
   

9. You have mail in /var/spool/mail/root
   

查看回收站

1. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /user/root/.Trash/Current
   

2. Found 1 items
   

3. drwxr-xr-x - root supergroup 0 2016-02-19 08:18 /user/root/.Trash/Current/testdir
   

恢复文件夹

1. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -mv /user/root/.Trash/Current/testdir /
   

2. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /
   

3. Found 4 items
   

4. drwxr-xr-x - hdfs supergroup 0 2016-02-04 00:38 /system
   

5. drwxr-xr-x - root supergroup 0 2016-02-19 08:17 /testdir
   

6. drwxrwxrwt - hdfs supergroup 0 2016-02-10 16:04 /tmp
   

7. drwxr-xr-x - hdfs supergroup 0 2016-02-10 16:02 /user
   

8. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -cat /testdir/test.txt
   

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