It is important to understand that the cluster is not a single computer but a network of machines with distinct roles.

Head Node (valhalla)

Purpose: This is the gate of the server, use it to log in, editing code/scripts, managing your files, viewing your files, submitting jobs and some other interactive activities.

Restriction: Do not run analysis or heavy computations here. Jobs running on the head node may be terminated immediately to preserve resources for other users.

Hardware: 128GB RAM, 8 cores 16 threads (Intel Xeon D-2146NT 3.0GHz)

Disks: local scratch 2TB

Compute Nodes

Purpose: These machines perform the actual data analysis, users cannot directly log in to those but slurm jobs are submitted via the head node. It is also possible to request an interactive session for testing.

Restriction: Dedicated to slurm jobs, you cannot directly log in

Hardware: 1x Standard Nodes: 380GB RAM each, 96 cores 192threads (AMD EPYC 9654P @ 3.71GHz) 1x High-Memory Node: 1 TB (1024 GB) RAM, 96 cores 192threads (AMD EPYC 9654P @ 3.71GHz)

Disks: local scratch 2TB