Mateusz Kaczanowski Personal Blog
Most of Raspberry like ARM devices have system image written to sdcard. Whenever we need to update base image we need to take out memory stick, write image and put it back. Now imagine that you have 8 boards and you want to update all of them (e.g your current system is crashing). So, you won't do it manually, will you?
Have you ever dreamed of building your own cluster? Running your own service on your own machines? Now with ARM boards it is possible! You don't need much space or excessive amount of money. In this article you may see how I did it and how to control power of each ARM device separately.
Long time ago I wrote php-signal-handler PHP module to handle unix signals while processing thread is blocked (you can't do it with pcntl). Enjoy!
After I locked up the ARM cluster in a rack cabinet, I noticed a loud noise coming from the central PSU. The recent summer heats took its toll, so it wasn't a surprise to see the devices melting inside the rack. Unfortunately, the cooling system was limited only to a few fans mounted to boards heatsinks, but nothing that would improve the internal airflow...