news
today's howtos
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ID Root ☛ How To Install Apache Cassandra on Ubuntu 26.04 LTS
A fresh Ubuntu 26.04 server, a quick apt install cassandra, and then nothing works. That is a common first experience on this release.
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Ronalds Vilciņš ☛ Keyboard Focus Styles With :focus-visible · Ronalds Vilciņš
:focus-visible gives the browser room to show focus when the interaction method needs it.
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Ronalds Vilciņš ☛ When CSS Layout Order Stops Matching the HTML
Grid and Flexbox can move an element to almost any visual position. They do not necessarily move it in the DOM, keyboard focus order, or screen reader reading order.
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Matthew Brunelle ☛ Setting up a Clan machine using PXE boot
Clan is a peer-to-peer computer management framework for NixOS. It lets you fully provision a remote machine in a declarative way. So, if Clan can control a machine over the network, why not just initially boot the machine over the network too? Then I wouldn't need to go out and buy a new flash drive.
This is where Preboot Execution Environment (PXE) boot saves the day. You run a PXE server on one machine that will serve up an image to boot. The client machine does a little autodiscovery, downloads the image and boots into it.
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Jane Street ☛ Jane Street Blog - Scaling and benchmarking a critical message bus using a new indexing strategy
Aria is our internal messaging framework and hosted system that processes multiple terabytes of data per day. Clients can subscribe to Aria to get a live stream of messages. As Aria usage has rapidly grown at the firm, we’ve had to find more opportunities to optimize and re-architect the system to scale with the increase in data volume and throughput. An intern working with the Aria team, Theodor Totev, focused this summer on using indexing and tree-splitting to improve a specific use case: How can we make it cheaper for clients to read just a subset of messages? His optimizations led to a 30% decrease in CPU usage when running on production workloads, while keeping the extremely high bar of correctness needed for such a critical system.