/tigress and /projects
In some cases it is possible to recover files that have been removed from /tigress or /projects. If you log in to Tigressdata (ssh <YourNetID>@tigressdata.princeton.edu) you will find a directory mounted called /backups. Try looking for your files in /backups/tigress or /backups/projects. This directory contains a snapshot of your files at the time of the most recent backup. You may be able to find previous snapshots in a hidden .snapshots directory, for example:
$ ssh firstname.lastname@example.org [ceisgrub@tigressdata2 ~]$ cd /backups/tigress/c/ceisgrub [ceisgrub@tigressdata2 ceisgrub]$ ls file1.txt file2.txt file3.txt [ceisgrub@tigressdata2 ceisgrub]$ cd .snapshots [ceisgrub@tigressdata2 .snapshots]$ ls SNAP-2020.01.11-00.36.15 SNAP-2020.01.25-03.33.52 SNAP-2020.02.01-02.29.24 SNAP-2020.02.05-19.27.38 SNAP-2020.02.13-22.40.15 [ceisgrub@tigressdata2 .snapshots]$ cd SNAP-2020.02.05-19.27.38/ [ceisgrub@tigressdata2 SNAP-2020.02.05-19.27.38]$ ls file1.txt file2.txt file3.txt file4.txt [ceisgrub@tigressdata2 SNAP-2020.02.05-19.27.38]$ pwd /backups/tigress/c/ceisgrub/.snapshots/SNAP-2020.02.05-19.27.38 [ceisgrub@tigressdata2 SNAP-2020.02.05-19.27.38]$ cp file4.txt /tigress/ceisgrub
Note that the date in the .snapshot directory names is when the snapshot was taken. In the example above the user was able to find an accidentally deleted file and copy it to /tigress.
It may be possible to recover files that were removed from /home/YourNetID. This must be done by someone in Research Computing. Please send an email to email@example.com and be sure to include the cluster name (e.g., Della, Tiger) and the path to the files (e.g., /home/aturing/project1/data).
/scratch/gpfs, /scratch/network, /scratch and /tmp
Files on the scratch filesystems are never backed up and can therefore never be recovered. Be sure to copy or move your important, non-volatile results to /tigress or /projects for long-term storage.