Using nearline storage: Difference between revisions

Nearline is only accessible as a directory on the login nodes and DTNs ("Data Transfer Nodes"),

To use Nearline, just put files into your <tt>~/nearline/PROJECT</tt> directory. After a period of time (24 hours as of February 2019), they'll be copied onto tape. If the file remains unchanged for another period (24 hours as of February 2019), the copy on disk will be removed, making the file virtualized on tape.  

If you remove a file from <tt>~/nearline</tt>, the tape copy will be retained for up to 60 days. To restore such a file, contact [[technical support]] with the full path for the file(s) and desired version (by date), just as you would for [[Storage and file management#Filesystem quotas and policies|backup]] restoration. Note that since you will need the full path for the file, it is important for you to retain a copy of the complete directory structure of your Nearline space. For example, you can run the command <tt>ls -R > ~/nearline_contents.txt</tt> from the <tt>~/nearline/PROJECT</tt> directory so that you have a copy of the location of all the files in your Nearline space.