Gadget Production Run

1. Freeze binary and parameters

• Finalize compile flags and the runtime parameter file.
• Archive source revision, toolchain versions, and compile logs.
• Build once and reuse the same binary across the entire campaign.

2. Stage filesystem and launch script

mkdir -p /scratch/<project>/gadget-prod/{ic,output,logs,restart}
cp <ic-files> /scratch/<project>/gadget-prod/ic/

#!/bin/bash
#SBATCH -J gadget_prod
#SBATCH -N 8
#SBATCH --ntasks-per-node=64
#SBATCH -t 24:00:00
#SBATCH -o logs/slurm-%j.out

cd /scratch/<project>/gadget-prod
srun /path/to/Gadget4 params_prod.txt

3. Runtime monitoring

• Track the timestep floor, load balance, and remaining memory headroom.
• Verify that checkpoints are being produced and are restartable.
• Keep run metadata in the same directory tree as outputs.

4. Quality checks

• Compare global statistics with pilot and baseline runs.
• Validate key observables against expected physical trends.
• Archive scripts and environment manifests alongside final data.