File management

Transferring files

From Windows computer to Vega/from Vega to Windows computer

To transfer files from/to a Windows machine, it has to have an SFTP/SCP client software installed, such as specified at the link. After downloading a client application, it will require a connection to the Vega Cluster using one of the login nodes link. Once logged in, you can use the file transfer window within the program to drag and drop files between local computer and the remote Vega Cluster.

From Linux/Mac computer to Vega/from Vega to Linux/Mac computer

To transfer files to and from a cluster on a Linux/Mac machine, the terminal application is used link. Commands secure copy (scp) or secure file transfer protocol (sftp) are used for transferring files. Files can also be transferred using the web interface Open OnDemand.

scp [OPTION] [user@login.vega.izum.si:]file1 [user@DEST_HOST:]file2

OPTION - scp options such as cipher, ssh configuration, ssh port, limit, recursive copy, etc.
[user@login.vega.izum.si:]file1 - Source file.
[user@DEST_HOST:]file2 - Destination file

SFTP clients

Data Transferring/Moving Using Command Screen

The successful transfer of data to your local location relies heavily on the stability of your connectivity and network throughput. To ensure a stable data transfer process,we recommend utilizing the command screen. This user manual provides step-by-step instructions on how to use the command screen effectively. Command screen is install on all login nodes.

Establish a secure connection to Vega where the data is located using SSH.

ssh username@logincpu.vega.izum.si

Start a new screen session

To start a new screen session, simply type the following command and press Enter:

   screen

Moving Data

With the command screen activated, you can now proceed with moving the data.
Use the appropriate command to copy or move the desired files or directories. For example:
To copy files, use the cp command:

    cp [source] [destination]

To move files, use the mv command:

    mv [source] [destination]

Monitoring the Data Transfer

While the data transfer is in progress, you can detach from the command screen without interrupting the process. To do this, press the following key combination:

   Ctrl + A, then press D

This will detach you from the command screen and return you to the terminal prompt.

Reattaching to the Command Screen

To reattach to the command screen and monitor the progress or make any necessary adjustments, use the following command:

   screen -r

Switch between windows

To switch between different windows within a screen session, use the keyboard shortcut Ctrl+A, followed by the number of the window. For example, to switch to window 1, press Ctrl+A, then 1.

List existing screen sessions

If you have multiple screen sessions running, you can list them using the following command:˛

   screen -ls

Close a screen session

To close a screen session, make sure you are in the window you want to close and simply type the exit command or use the keyboard shortcut Ctrl+D.

Note: Losing your SSH connection to Vega does not interrupt the ongoing data transfer process. The process remains active in the screen session. To resume your screen session, you will need to reconnect to Vega.