Written by 
Patrick is one of the leading experts of Apache Cassandra and data modeling techniques. As the Chief Evangelist for Apache Cassandra and consultant for DataStax, he has helped build some of the largest and exciting deployments in production. Previous to DataStax, he was Chief Architect at Hobsons and an Oracle DBA/Developer for over 15 years. […]
The Don’t Repeat Yourself Wikipedia article states: Violations of DRY are typically referred to as WET solutions, which is commonly taken to stand for “write every time”, “write everything twice”, “we enjoy typing” or “waste everyone’s time”. But as any Phish fan can tell you, wasting time is actually good! A year ago, I gave […]
Sometimes when you’re trying to figure out the way the world works, basic math is enough to get you going. If we increase the hot water flow by x, the temperature of the mixture goes up by y. Sometimes you’re working on something that’s just too complicated for that, and you can’t even begin to […]
Way back in late 2019, I dissected a Reolink B800 IP camera to demonstrate the various parts of an embedded Linux system. It’s fairly nice hardware, actually—it has a 4K video sensor, a microphone, power over Ethernet, and is nominally waterproof. And yes, it runs Linux. It came in a “kit” of six cameras and […]
This is the fifth part of the Mastering Embedded Linux series, which is designed to help you become an expert at developing low-cost, customized embedded Linux systems. Previously, I provided an overview of the embedded Linux landscape, then dove straight into tutorials for compiling Raspberry Pi firmware using Buildroot. In this article and the next, […]
Hard to believe that I’ve had the same PC case since 2011, and my last serious upgrade was in 2015. I guess that’s yet another sign that the PC is over, because PC upgrades have gotten really boring. It took 5 years for me to muster up the initiative to get my system fully upgraded! […]
This is the fourth part of the Mastering Embedded Linux series, which is designed to help you become an expert at developing low-cost custom embedded Linux systems. Continuing the ongoing theme of developing customized firmware, I’ll be discussing how to add high-level “features” to your firmware image by taking off-the-shelf open source software, configuring it, […]
After the success of my previous post regarding my business card that runs Linux on a diminuitive Allwinner F1C100s processor, I have received a ton of good mail about it. I’ve had people tell me they bought some for 61 cents (!) in moderate quantity on Taobao. Some people have asked for samples. And I’ve […]
Header Photo by Pearse O’Halloran on Unsplash For our Android clients we have a small component library which is used to shared common visual elements across the different Android applications that we work on. We recently updated our applications to the Material Components library, meaning that our component library itself needed to go through the same transition. Within […]
Recommended content, which is surfaced in places like Explore or hashtags, is a central part of people’s experience on Instagram. As people browse this “unconnected content” from accounts that they aren’t already linked to on Instagram, it’s extremely important to identify and deal with content that violates our Community Guidelines or might be considered offensive […]