Delving into the important but unheralded optimizations that enable HPC systems to truly fly, Stephen Sachs walks us through some of the nitty gritty details that can throttle - or unleash - performance.

From ancient Fortran codes pushing stack limits, to NFS threads saturating head nodes, it’s a masterclass in the hidden factors that separate functional clusters from blazing fast ones. For anyone running simulations and models on a cluster in the cloud, the tips here will give you some insights into the countless interdependencies that make up a working HPC system.

The next time your code screams instead of grinds, remember the care poured into finely tuning these massive machines, and be grateful for the wizards who work their magic.

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