How to retrieve files from the pNFS snapshot on the grid

Follow these steps to recover files using your pNFS snapshot.

Step 1

Log on to the Grid.

Step 2

In this example, a directory was accidentally deleted called namdtutorial.

  • Example: ls -l.

  • We do not see that directory in the home directory.
Step 3

The snapshots are found in the volumes in /wsu/home . The directory after that corresponds to the first two letters of one's AccessID. Within that directory is the .snapshot directory.

  • Type cd ~/.snapshot.

  • List the contents of the directory by typing ls.

  • You can see that there are two weeks worth of snapshots listed in the example above.
Step 4

We will see if one of the snapshots has the deleted file that we want to restore.

  • Copy the directory name by highlighting it.

  • Type cd and right-click to paste the directory name.

  • List the items in the directory by typing ls.

  • You can see that the directory that we want to restore, called namdtutorial, is in this snapshot.
Step 5

Copy the file to your home directory.

  • Example: cp -R namdtutorial/ ~.

Step 6

Go to your home directory by typing cd.

  • List the contents to make sure that the file is there by typing ls -l.

Your file has now been restored.

 

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