Jeff Geerling

I created a repository to aggregate SBC (Single-Board Computer) review data and testing methodology for the various hardware devices I test. The goal is to be completely transparent with how I test devices, and to share all the data from my testing which may have not made it to a public repository before.

I built the automated Top500 benchmark to assist people running the HPL, or 'High Performance Linpack' benchmark on their systems—whether a single node or tens or hundreds! I wanted an easy way to compare systems against each other, and all I've found online are hand-tuned scripts or tutorials made just for one platform. This Ansible playbook works on any system that can run Ubuntu or Debian, and even works in clustered environments, so you can easily measure how many Gigaflops, Teraflops—or even Exaflops!—you can get out of your system!

I built an open source Ansible automation project to go along with my Ceph distributed storage exploration on a new 6-node Raspberry Pi Mini ITX motherboard, the DeskPi Super6c. I also published a YouTube video guiding people through both the hardware and the software setup: https://www.youtube.com/watch?v=ecdm3oA-QdQ

A couple years after the Raspberry Pi Compute Module 4 launched, the open source community finally got one of the less-flashy features working: PTP hardware timestamping. This makes the Compute Module 4 a very powerful timekeeping device, as it can behave as a network time server with the highest level of precision, using the Precision Timing Protocol and devices like GPS receivers and TXCOs (Temperature-Controlled Oscillators) or chip-scale atomic clocks to control timing over Ethernet networks.

An ESP8266 sketch for the DIY air quality sensor from AirGradient, along with instructions to integrate multiple sensors into a Prometheus installation for long-term air quality monitoring in a home or workplace.

If you're relying on Google or Apple to back up your data, or you just have a hard drive plugged into your computer, your data's at risk! In this video I explain the 3-2-1 backup rule, and how I made a custom backup plan to make sure I never lose any important data.

After seeing AirGradient's DIY Air Quality monitor based on the ESP8266 and some common sensors, I decided to integrate multiple monitors in my home. I made this video, which shows how I did everything, and I built and maintain an AirGradient Prometheus exporter on GitHub (https://github.com/geerlingguy/airgradient-prometheus), which lets me store the data from the air quality monitors in my local Prometheus instance.

Raspberry Pi configuration for all things Internet! This open source Ansible playbook configures a Raspberry Pi with Pi-hole, Prometheus, and Grafana, to help control and monitor your Internet connection. It also includes other optional monitoring dashboards for monitoring more things in your home!