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Our consultants share decades of collective expertise in software development on the Chariot blog through tutorials, analyses, and insights on the business of software.

How to run Apple OS X Sonoma Developer Beta on UTM from OS X Ventura

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If you want to run OS X Sonoma, but can’t dedicate a computer to it, you could always install it on the UTM virtual machine engine. This allows you to test out Beta OS X features without taking over your primary machine’s OS. Pre-requisites: A Mac with Apple Silicon running OS X Ventura An Apple Developer account ($99 / yr) UTM (available on the Mac App Store) Steps: Download the IPFW restore file for OS X Sonoma for Apple Silicon…

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Performance Comparison: Athena versus Redshift

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I’ve always been a fan of database servers: self-contained entities that manage both storage and compute, and give you knobs to turn to optimize your queries. The flip side is that I have an inherent distrust of services such as Athena, which promise to run queries efficiently on structured data split between many files in a data lake. It just doesn’t seem natural; where are the knobs?

So, since I had data generated for my post on Athena performance with different file types, I decided to use that data in a performance comparison with Redshift.

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Beyond the Bastion: Connecting to Your Resources in AWS

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In a perfect world, there would never be a need to connect to your resources running on AWS. In the real world, it’s sometimes necessary to get your hands dirty and look at what’s happening on the actual machine, especially during development. This post dives into a few ways to connect your workstation to resources running inside a VPC. It started out as a how-to for using bastion hosts, but quickly expanded to look beyond the bastion.

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Analyzing Glue Jobs with AWS X-Ray

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It’s possible to analyze your Glue jobs using just the logs they produce. Possible. But it’s not a pleasant task: your log messages are buried in messages from the framework, and in the case of a distributed PySpark job they’ll be spread amongst multiple CloudWatch log streams. In this post I look at an alternative: AWS X-Ray, which captures and aggregates “trace segments” that monitor specific sections of your code. With X-Ray, you can easily see where your jobs are spending their time, and compare different runs.

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Get started with AWS IoT Core with a MKR WiFi 1010, a MKR Env Shield and this starter project

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Introduction Today’s small microcontrollers offer impressive functionality and provide an opportunity to replace older, more expensive software and hardware. Consider the case where a facility wants to have control over devices or equipment, with rules that evaluate telemetry from sensors and activate, deactivate or regulate equipment and other devices. Many large facilities have systems in place that rely on a global standard named BACNet. This protocol has been an ISO standard since 2004 and allows for different types of devices…

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