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NSF NCAR Advanced Research Computing

NSF NCAR Advanced Research Computing#

  • The NSF NCAR Computational and Information Systems Lab (CISL) provides resources for high performance computing, data anslysis and visualization, and data storage and archives.

  • You need an account in order to access these resources. Let Jiang know if you haven’t got your account.

    • To login, please set up you CIT password and the DUO two-factor authenticationthe (Duo Mobile app or a landline phone).

    • See Authenticating with Duo for details.

    • Call 303-497-2400 or email cislhelp@ucar.edu if you don’t have a CIT password.

  • The project number for paleoCAMP is UAZN0035, which will expire on August 31, 2024.

  • See here for options for a long-term access, such as the “Data Anaysis Allocation (University)”.

Use Derecho to run CESM via Terminal (Day 3 Afternoon Session 1)#

A terminal is a text-based interface used to control a Unix computer. It is widely considered the most efficient method to accomplish a given task or maintenance operation.

Most of the users use terminal to remotely access the NCAR HPC and run CESM there.

Two ways to launch a terminal
1. NCAR JupyterHub (choosing Derecho when login)
2. your system (Mac or PC; most commonly used)

Use method 1 if you have never used Unix (incl. its text editor such as vi and emacs) before.
Use method 2 if you are comfortable with or want to learn text editing in Unix.

Option 1. Launch a terminal from NCAR JupyterHub#

Go to NCAR JupyterHub: https://jupyterhub.hpc.ucar.edu/

JupyterHub login

Figure: JupyterHub login

Sign in with your username and password, and approve the DUO push#

JupyterHub login

Figure: JupyterHub login

Start the JupyterHub with the Derecho node#

  • From the dropdown menu, select

    • Derecho under Resource Selection

    • develop under Queue or Reservation (to save resources)

    • UAZN0035 under Project Account

    • 06:00:00 under Wall Time

Jupyterhub Derecho

Figure: Jupyterhub Derecho

Launch a terminal within the JupyterHub

Terminal Derecho

Figure: Terminal Derecho

Note: some terminal functions (e.g. X11 forwarding) do not work in a terminal opened through JupyterHub.

Option 2. Launch a terminal from your system#

If on a Mac, open a terminal#

Go to the search spotlight (magnifying glass icon) and type in terminal.

  • Terminal is automatically built into the MacOS and clicking on it will open a terminal window.

  • iTerm is software that was installed by the user on their laptop and is another option for opening a terminal.

terminal mac

Figure: terminal mac

If on a PC, open a terminal#

Go to the start menu and type in terminal.

  • Terminal will open a terminal window.

  • Command Prompt will open a terminal window.

terminal PC

Figure: terminal PC

Login into the HPC at the NSF NCAR using ssh#

ssh -XY YOUR_USERNAME@derecho.hpc.ucar.edu

terminal SSH

Figure: terminal SSH

  • The -XY option enables the X11 forwarding.

  • X11 forwarding is an SSH protocol that enables users to run graphical applications on a remote server and interact with them using their local display and I/O devices.

[NEW] Avoid jamming DUO-JupyterHub when multiple users login at the same time#

  • Go to NCAR JupyterHub: https://jupyterhub.hpc.ucar.edu/

  • Type in your username

  • Type in your password,Passcode

    • password is the CIT password you set up with CISL

    • Passcode is the six digits on your DUO app (see the image below)

  • No DUO push involved

JupyterHub login

Figure: DUO Passcode

How to log out the JupyterHub?#

  • Click the File tab and find and click Log Out at the bottom

More learning resources#

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