Steps to Access Horizon

1. Confirm you have a Horizon allocation by logging in to the TACC User Portal and selecting "Projects & Allocations" from the sidebar menu to view the information. If you do not already have an allocation, you will need to request one; this will be covered in Allocations.
2. If you have not done so already, set up Multi-Factor Authentication (MFA) for your TACC account.
3. Use SSH to log in to Horizon. If you are unfamiliar with using SSH, please review Remote Connections in the Linux CVW topic.
   The above command will connect you to an available login node. You can also use X11 forwarding with -X or -Y for graphical applications. (Note, not all applications will come with an X11 display option on Horizon because Wayland is the default display protocol).

For more guidance on initial access, see TACC's documentation on Managing Your TACC Account.

Good Conduct

It is important to remember that Horizon is a shared resource with hundreds of users, so please use the system and its components as intended. Below is an abbreviated list of the guidelines of good conduct on this resource. For a full list with further explanations, see the TACC Good Conduct Guide.

• Login Nodes
  • Use login nodes to edit/manage files, transfer files, compile codes, submit/track jobs
  • Avoid computationally intensive activity on login nodes
• Shared File Systems
  • Run I/O intensive jobs in $SCRATCH
  • Avoid opening and closing files repeatedly
  • Avoid many small files in one directory
• Internal and External Networks
  • Avoid too many simultaneous/recursive file transfers
• Job Submission
  • Test your job at a small scale first
  • Respect memory limits and other system constraints
  • Request only the resources you need

Creating a TACC Account from TACC Training

Multifactor Authentication from TACC Training

SSH to TACC resources w/ Mitchell Bailey from TACC Training