Example Analysis of Recycle Bin function of Hadoop 2.x New feature

This article mainly introduces the example analysis of the new features of Hadoop 2.x Recycle Bin, which is very detailed and has a certain reference value. Interested friends must read it!

Turn on the Recycle Bin function, you can delete files without timeout, restore the original data, play a role in preventing erroneous deletion, backup and so on.

1. Parameter setting and working mechanism of Recycle Bin

2. Enable the Recycle Bin

Modify core-site.xml to configure garbage collection time of 1 minute.

Fs.trash.interval1

3. Check the Recycle Bin

The path of the recycling bin in the cluster: / user/ username / .Trash /... .

4. Modify the user name to access the garbage Recycle Bin

Enter the user name of the garbage collection bin. The default is dr.who, which is changed to the user name.

[core-site.xml]

Hadoop.http.staticuser.user user name

5. Files deleted through the program will not pass through the Recycle Bin. You need to call moveToTrash () to enter the Recycle Bin.

Trash trash = New Trash (conf); trash.moveToTrash (path)

6. Recover Recycle Bin data

Hadoop fs-mv/user/atguigu/.Trash/Current/user/atguigu/input / user/atguigu/input

7. Empty the Recycle Bin

Hadoop fs-expunge above is all the contents of this article entitled "sample Analysis of the Recycle Bin function of Hadoop 2.x New Features". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!