The ITSR team recommend most Apocrita users submit job scripts for multi-task workloads according to the default recommendations in our documentation, but some specific workloads need additional specifications in Slurm job scripts.
Our xlg nodes feature NVIDIA L40S GPUs, based on the Ada Lovelace
architecture. They are a cheaper alternative to the H200 GPUs but still offer
competitive performance depending on your scientific problem. In this blog post,
we will compare the A100, H200, and L40S GPUs to help you decide which one to
use for your jobs.
Don't use a notebook to do an HPC job-script's job, unless your notebook is also a
job-script. Marimo, an alternative to Jupyter, enables this, and also helps mitigate
some other common criticisms of notebooks. Through the magic of web-assembly,
it even allows your Python code to live rent-free in someone else's web browser.
Using Lyapunov fractals as a somewhat psychedelic example, we might as well
experiment with multiprocessing and shared memory along the way.
Recent changes to the R 4.6.1 and RStudio 2026 setup
on Apocrita have opened up the possibility to use the
pak package installer.
The ITSR support team will be making some changes to R and RStudio on Apocrita in August 2026. Some action will be required by users, so please read the below carefully.
std::span
The programming language C++ is still widely used today, especially for high-performance computing. Out-of-date practices from the 80s and 90s should still work now because the language is designed to be highly backwards compatible. As C++ evolved, there were numerous efforts to modernise the language and update programming practices with new features to improve the C++ experience, such as memory-safety features.