raspberry-pi-dramble

Another question: is that MB/sec or MiB/sec? Note that the 400 MiB/sec benchmark is 420 MB/sec. Not a _huge_ difference, but it is a difference ;) The other major difference is anything non-sequential, especially things like 4K reads. This is where the PCIe->USB->SATA (or PCIe->USB->NVMe) adapter overhead really slows things down. Try out my benchmark script and see how it fares: https://github.com/geerlingguy/raspberry-pi-dramble/blob/mas... (Thank the marketers for making everything confusing with MiB and MB...)

I use Kind (and Minikube, and a number of other solutions too), but this is kind of my "Kubernetes-the-really-hard-way" fun project. Note that I maintain a parallel configuration that runs a multi-node cluster on Vagrant for local development [1] as well as a docker environment built for CI purposes[2] using almost all the same images, with the same Ansible playbooks to configure them all across platforms. [1] https://github.com/geerlingguy/raspberry-pi-dramble/tree/mas... [2] https://github.com/geerlingguy/raspberry-pi-dramble/tree/mas...

What do you know, that's exactly how I do local development work for the cluster ;) https://github.com/geerlingguy/raspberry-pi-dramble/tree/mas...

I finally acquired enough Pi 4's (the 2GB RAM version—I can't find the 4GB version anywhere yet) to rebuild my Kubernetes cluster (www.pidramble.com) using the latest Pi. So far my takeaways are: 1. The official PoE HAT seems to work fine... but you can't shut down the Pi and keep it shut down—it seems to reboot if powered by the PoE HAT :/ 2. The Pi 4 feels slightly faster, but having double the RAM (I can't find 4 GB Pi 4's in stock anywhere) is reallllly nice for Kubernetes. 3. Docker is annoying to get running on Raspbian 10/Buster, since the standard repo has a broken version, and Docker's repo only has listings for Raspbian 9/Stretch. Therefore you have to hack around the install script a tiny bit to get Docker installed. I currently have Kubernetes running fine, but am having issues with the cluster networking (this seems to happen

I use Watts on the page where I aggregate my results[1], but since most USB-related projects measure mA (and most battery ratings use mAh), I use the same convention as a default, since 5V can be assumed in all cases. [1] https://github.com/geerlingguy/raspberry-pi-dramble/wiki/Pow...

For sure: "Jetson TX1 draws as little as 1 watt of power or lower while idle, around 8-10 watts under typical CUDA load, and up to 15 watts TDP when the module is fully utilized, for example during gameplay and the most demanding vision routines."[1] Anecdotally, the RPi2 has been measured[2] around 4-6 watts under load and the Edison was measured[3] around 1 watt. [1] http://devblogs.nvidia.com/parallelforall/nvidia-jetson-tx1-... [2] https://github.com/geerlingguy/raspberry-pi-dramble/wiki/Pow... [3] https://www.openice.info/2015/07/24/three-days-with-intel-ed...

A cluster of six Raspberry Pi 2s running Drupal (a PHP CMS) is about 20% slower than a single i7 laptop with an SSD for general usage, and can be _much_ slower if your usage requires lots of disk or network I/O. The 4-core ARMv7 chip in the Pi 2 is way faster than the chip in previous Pis, but it's not a speed demon by any means. And the network I/O (and all I/O) being tied down to a slowish USB 2.0 bus means you're limited to ~90 Mbps through LAN, or ~200 Mbps if you use a USB 3.0 network adapter. Even trying a fast SSD plugged into one of the USB ports (rather than a comparatively slow 'Extreme Pro' microSD card), you won't get a huge performance boost because of limited I/O bandwidth. See many, many more benchmarks on this wiki: https://github.com/geerlingguy/raspberry-pi-dramble/wiki P.S. I have a cluster of six Pi 2s running http://w

I have an educational site running on my cluster of 6 Pi 2s in my basement: http://www.pidramble.com/ Code, tutorial, parts list, etc. here: https://github.com/geerlingguy/raspberry-pi-dramble

As someone else who's also built a cluster of Pi 2s, I would agree that the primary purpose is education and fun/tinkering, not performance. That being said, for light web hosting purposes, a cluster of six Pi 2s performs roughly 70% as well as a similar cluster of 6 VMs on Digital Ocean. See more on this project's wiki, in the performance/benchmarking section: https://github.com/geerlingguy/raspberry-pi-dramble

With the Pi 2, it's not as bad as you'd think; see: https://github.com/geerlingguy/raspberry-pi-dramble/wiki/Dra... (Drupal 8 on a 6-server Pi 2 LEMP + Redis stack is about 80% as fast as running on Digital Ocean, in some benchmarks). For test purposes, a local Pi cloud (or something similarly-priced) is a decent deal.