CDH5之Trash

2021-09-22 03:56:36

参考:http://my.oschina.net/cloudcoder/blog/179381
      http://www.linuxidc.com/Linux/2012-02/55102.htm

查看CDH 的hdfs的配置,是否开启trash 及 保留时间:

CDH5之Trash


CDH5之Trash

测试:

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  1. 1.创建test.txt
  2. [root@sht-sgmhadoopnn-01 ~]# vi /tmp/test.txt
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5

  9. 2.创建文件夹
  10. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -mkdir /testdir
  11. You have new mail in /var/spool/mail/root
  12. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /
  13. Found 4 items
  14. drwxr-xr-x - hdfs supergroup 0 2016-02-04 00:38 /system
  15. drwxr-xr-x - root supergroup 0 2016-02-19 08:17 /testdir
  16. drwxrwxrwt - hdfs supergroup 0 2016-02-10 16:04 /tmp
  17. drwxr-xr-x - hdfs supergroup 0 2016-02-10 16:02 /user

  19. 3.put 文件到hadoop
  20. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -put /tmp/test.txt /testdir
  21. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /testdir
  22. Found 1 items
  23. -rw-r--r-- 3 root supergroup 10 2016-02-19 08:18 /testdir/test.txt
  24. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -cat /testdir/test.txt
  25. 1
  26. 2
  27. 3
  28. 4
  29. 5
  30. You have mail in /var/spool/mail/root

  32. 4.删除文件夹testdir
  33. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -rm -r /testdir
  34. 16/02/19 08:27:05 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 1440 minutes, Emptier interval = 0 minutes.
  35. Moved: 'hdfs://sgm-nameservice/testdir' to trash at: hdfs://sgm-nameservice/user/root/.Trash/Current
  36. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /
  37. Found 3 items
  38. drwxr-xr-x - hdfs supergroup 0 2016-02-04 00:38 /system
  39. drwxrwxrwt - hdfs supergroup 0 2016-02-10 16:04 /tmp
  40. drwxr-xr-x - hdfs supergroup 0 2016-02-10 16:02 /user
  41. You have mail in /var/spool/mail/root

  43. 5.查看回收站
  44. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /user/root/.Trash/Current
  45. Found 1 items
  46. drwxr-xr-x - root supergroup 0 2016-02-19 08:18 /user/root/.Trash/Current/testdir

  48. 6.恢复文件夹
  49. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -mv /user/root/.Trash/Current/testdir /
  50. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /
  51. Found 4 items
  52. drwxr-xr-x - hdfs supergroup 0 2016-02-04 00:38 /system
  53. drwxr-xr-x - root supergroup 0 2016-02-19 08:17 /testdir
  54. drwxrwxrwt - hdfs supergroup 0 2016-02-10 16:04 /tmp
  55. drwxr-xr-x - hdfs supergroup 0 2016-02-10 16:02 /user
  56. [root@sht-sgmhadoopnn-01 ~]# hadoop fs -cat /testdir/test.txt
  57. 1
  58. 2
  59. 3
  60. 4
  61. 5


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