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What every IT person needs to know about OpenBSD Part 3: That packet filter
Useful and fun features related to the OpenBSD packet filter.
New
The latest blog posts to take off on Hacker News. 2,560 posts.
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Demystifying OpenZFS 2.0
Explore the changes and reasons behind OpenZFS 2.0. This article clarifies the transition from feature flags and its impact on FreeBSD 13.
903
Debugging a Linux network stack crash via a single register value
It’s not every day that you get to debug what may well be a packet of death. It was certainly the first time for me. What do I mean by “a packet of death”? A software bug where the network stack crashes in reaction to a single received network packet, taking down the whole operating system with it.
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New and improved Linux Random Number Generator ready for testing
We enable the world to secure the web. Burp Suite, the Web Security Academy, and world-leading research from PortSwigger — the AppSec community’s home.
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Signals and Threads Podcast
Listen in on Jane Street’s Ron Minsky as he has conversations with engineers working on everything from clock synchronization to reliable multicast, build systems to reconfigurable hardware. Get a peek at how Jane Street approaches problems, and how those ideas relate to tech more broadly.
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Debugging memory corruption: who the hell writes “2” into my stack? (2016)
Several weeks ago we received a bug report from a customer that said their game was crashing when using IL2CPP scripting backend. QA verified the bug and assigned it to me for fixing. The project was quite big (although far from the largest ones); it took 40 minutes to build on my machine. The instructions on the bug…
908
Make your monorepo feel small with Git’s sparse index
The new sparse index feature makes it feel like you are working in a small repository when working in a focused portion of a monorepo.
909
We saved millions in SSD costs by upgrading our filesystem
During COVID we experienced rapid growth in the amount of data we ingest. This post details some of the problems this caused us and how we solved them.
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The LZ4 introduced in PostgreSQL 14 provides faster compression
Haiying Tang takes you on a tour of LZ$ TOAST, the new column opton compression in PostgreSQL 14, and shows the speed and compression ratio gains.
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From macOS to Arch Linux
First impressions
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Linux x86 program start up – How the heck do we get to main()? (2011)
This is for people who want to understand how programs get loaded under linux. In particular it talks about dynamically loaded x86 ELF files. The information you learn will let you understand how to debug problems that occur in your program before main starts up. Everything I tell you is true, but some things will be…
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Amazon Time Sync Service
Discover more about what's new at AWS with Amazon Time Sync Service now makes it easier to generate and compare timestamps
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Apple Silicon Macs can't boot from external drive if internal drive failed
CCC 5.1.27 and CCC 6 can make bootable copies of the system on Intel and Apple Silicon Macs (11.3+) right now, and we'll continue to support that functiona...
915
An Update on Our Outage
Roblox is a global platform where millions of people gather together every day to imagine, create, and share experiences with each other in immersive, user-generated 3D worlds.
916
Perfecting GLFW for Zig, and finding lurking undefined behavior that went unnot
Today, I am announcing mach/glfw: Ziggified GLFW bindings with 100% API coverage, zero-fuss installation, cross compilation, and more.
917
Firefox 94 to start using EGL on Linux
Hi there! This is a guest post from Robert Mader, who contributed enormous improvements to Firefox’s graphics stack on Linux. TL;DR In the upcoming Firefox 94 release we will enable the EGL b…
918
Comparing Nginx performance in bare metal and virtual environments
We compare NGINX performance in bare-metal and virtualized (hypervisor) environments, finding a small but measurable performance cost for hypervisors. We also find that performance in Kubernetes environments is worse for network-bound but not CPU-bound operations.
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OpenBSD: How it all started
OpenBSD remains a crucial yet largely unacknowledged player in the open-source field.
920
Swift Distributed Actors
We’re thrilled to announce a new open-source package for the Swift on Server ecosystem, Swift Distributed Actors, a complete server-oriented cluster library for the upcoming distributed actor language feature!
921
How Microsoft reduced Windows 11 update size by 40%
Reducing update size is important to you, and to us. Explore the techniques we used in Windows 11.
922
Paxos automatically determined safe and secure
In an important step toward ensuring the protocols that dictate how our networked services operate are safe, secure and running as expected, University of Michigan researchers have automated a technique called formal verification. Their system proves, without any human effort, that one of the mos
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Postgres audit tables saved us from taking down production
Learn how audit tables helped us avoid a serious incident, and how you can create audit tables in your own Postgres databases.
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New HTTP standards for caching on the modern web
If you run any large public-facing website or web application on the modern web, caching your static content in a CDN or other caching service is super...
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32 Bit Real Estate
Apps on Fly.io all get their own routable IPv4 addresses. Here's what that costs us.
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How Time Series Databases Work, and Where They Don’t
This blog takes a deep dive into the hows and whys of time series databases—and why Honeycomb couldn't be limited to a TSDB implementation.
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OpenBSD Webzine Issue #2
Webzine created by volunteers who are passionate about the OpenBSD project development.