HPC Day 2

1. Review the program for today: you have 1h15m of videos to watch.
2. Answer any questions.

By the end of the day you should be familiar with:

• how jobs are scheduled in Slurm
• submitting serial, shared-memory, distributed-memory and hybrid jobs
• submitting array jobs
• running interactive jobs, and switching between interactive and batch jobs for the same task
• how to estimate memory requirements of a completed Slurm job

Some of the hands-on exercises we will do in the afternoon Zoom session:

• Using a serial job, time optimized (-O2) vs. unoptimized C code.
• Using a serial job, time a C code vs. a Python code.
• Submit an array job for different number of terms in the summation of \pi.
• Try scaling an MPI job with 1 -> 2 -> 4 -> 8 cores and measuring the speedup.
• Test a code inside an interactive job.