Welcome to the Deucalion User Guide

This user’s guide for the Deucalion supercomputer is intended to provide the minimum amount of information needed by a new user of this system. It is assumed that the user is familiar with many of the standard features of supercomputing as the Linux operating system.

Select a category from the navigation bar at the left of the page or use the search box to navigate from our site. These pages are constantly evolving.

Changelog (19/02/2025) The nodes in the dev-x86 partition are now connected to the Internet. Currently, both the dev-x86 and dev-arm partition nodes, as well as the login nodes (ln01 through ln04), have Internet access.

(19/02/2025) We added a command that allows access to Deucalion via SSH using Windows PowerShell.

(12/02/2025) We updated the salloc command to immediately open a shell in the head node of the allocation, effectively making srun (...) --pty bash and salloc interchangeable for most of the interactions.

(26/09/2024) We found a bug that does not let jobs run while using srun. While we correct it, please use mpirun instead. You will need to load an OpenMPI module beforehand (e.g. ml OpenMPI). EDIT: this has now been solved.

(26/08/2024) Corrected a bug that allowed accounts made for a certain architecture to use other architectures. To check slurm accounts associated with a user run /usr/local/bin/billing. The last letter of the account shows the architecture your account can access (a=arm; x=x86, g=gpu [a100 partitions]).

(13/08/2024) The login nodes (ln01 through ln04) are the only x86 nodes with internet access. For the arm partition, only the nodes in the dev-arm partition have access to the internet. Please download your files using these nodes.