Notes on the things that broke, and what fixed them.
Subscribe via RSSTen thousand sensor readings a second into a Rust gateway capped at 512MB — then I killed Postgres mid-cascade during a simulated gas leak. Zero alarms lost, counted rather than assumed.
A distributed industrial safety system running on one mini PC under my desk — OpenStack squeezed into 28GB of RAM, five public domains with zero open ports, and a database built to survive the firehose.