Hoffman2 for UCLA students (Interactive Mode)

Two ways to deal with high computation tasks

• Hoffman2 (UCLA Super Computer Access) The Social Sciences High Performance Computing Cluster link

• Hoffman2 (UCLA Super computer access): useful when you have parallel codes

Our focus today will be Hoffman2 (Interactive Mode)

Create Your Account

you need an approval from a faculty member registered in Hoffman2 link

All instructions are given on the website here

Required Software¹

• For Windows, install any one of the following free ssh client programs:
  • MobaXterm
  • Git Bash
  • PowerShell 5.1 or later
  • Windows Subsystem for Linux
  • Putty
  • Cygwin

Hoffman2 and Interactive R session

Once you registered your Hoffman2 account, open your terminal:

1. Open up your SSH client, connect to the login node on Hoffman:

$ ssh -X yourusername@hoffman2.idre.ucla.edu

2. Request an interactive node with 8 CPU core, a runtime of 1 hours, and 2GB of memory per core

$ qrsh -l h_rt=1:00:00,h_data=2G -pe shared 8

3. Run R studio on interactive node (2 lines):

$ module load Rstudio
$ rstudio

4. Then you can install your packages in R using the Rstudio interactive popup

Now, try to run your R session

Data Transfer

To manage the Hoffman2 folder, I use Cyber Duck. An alternative is FileZilla for MAC and WinSCP for Windows.

To connect with Cyber Duck +,

• Open Cyber Duck/FileZilla/WinSCP

• create a “new connection” or “new session” and fill out the followings:

  • file protocol = SFTP
  • host = hofman2.idre.ucla.edu
  • username/password: your Hoffman2 username and password

Please let me know if there are any errors or issues! (doeun2+issue@ucla.edu)

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1. https://www.hoffman2.idre.ucla.edu/Using-H2/Connecting/Connecting.html?highlight=mobaxterm#setting-up-ssh-clients-for-windows↩︎