File transfer
Access to the compute and storage systems (Betzy, Fram, Saga, NIRD) is permitted only trough secure shell (ssh).
One can use scp
(secure copy) or sftp (secure file transfer protocol) and rsync to upload or download
data. There are graphical front-ends for these tools, for instance
WinSCP for MS Windows.
Transferring files between Betzy/Fram/Saga and NIRD
Since NIRD is mounted on the login nodes of Betzy, Fram, and Saga,
one can use regular
cp or mv commands on the cluster login nodes to copy or
move files into or out of the NIRD project areas.
For more information, please check out the Betzy, Fram, and Saga storage page.
Transferring files between your computer and a cluster using scp
Few typical examples when using scp:
Copy single file to home folder on Fram.
Note that if the folder is omitted (the part after the :), the home folder is used by default:
$ scp my_file.tar.gz <username>@fram.sigma2.no:
Copy a directory to work area:
$ scp -r my_dir/ <username>@fram.sigma2.no:/cluster/work/users/<username>/
Copy a result directory back to my laptop:
$ scp -r <username>@fram.sigma2.no:/cluster/work/users/<username>/my_results /home/some/place
Interactive secure file transfer program (Secure FTP)
In this example we copy all logs with names that start with “out” and
end with “.log” from the project1 folder to /nird/projects/project1 on NIRD:
$ sftp <username>@nird.sigma2.no
sftp> lcd project1
sftp> cd /nird/projects/project1
sftp> put out*.log
Troubleshooting - Broken pipe error during scp/sftp/rsync
The organization which provides the network to the clusters, may perform daily
housekeeping of their DNS and then the connection from outside to the NRIS
services can drop. This can cause a “broken pipe” error during file transfer
from outside. To avoid this, especially while copying large datasets, it is
recommended to open a screen session from the NRIS cluster/storage login
node and to pull/push the data from there.