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Delivering Billions of Messages Exactly Once
The single requirement of all data pipelines is that they cannot lose data. Data can usually be delayed or re-ordered–but never dropped.
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 1,232 posts.
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Speeding up Linux disk encryption
Encrypting data at rest is vital for Cloudflare with more than 200 data centres across the world. In this post, we will investigate the performance of disk encryption on Linux and explain how we made it at least two times faster for ourselves and our customers!
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63 Cores Blocked by Seven Instructions
I seem to have a habit of writing about super powerful machines whose many cores are laid low by misuse of locks. So. Yeah. It’s that again. But this one seems particularly impressive. I mean, how …
574
Google Chrome Keystone is modifying /var symlink on non SIP Macs causing k-panic
Reports that some AVID Users Macs would no longer boot. It now may be that a Google Chrome Keystone update modifies /var on NON SIP Protected Macs.
575
Raspberry Pi 3 Fastboot – Less Than 2 Seconds
This post tells about my journey on fast-booting a Raspberry Pi 3 (RPI). In addition to that, some optimizations are discussed that can be applied to a Qt (QML) application. At the end, we will have a …
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exFAT in the Linux kernel
We’re pleased to announce that Microsoft is supporting the addition of Microsoft’s exFAT technology to the Linux kernel.
577
Google Sheets ported its calculation worker from JavaScript to WasmGC
Calculations in Google Sheets were initially done on the server, then on the client in JavaScript, and now on the client in WebAssembly Garbage Collection. This case study explains how and why.
578
Using Rust to Scale Elixir for 11M Concurrent Users
Discover the latest news and app updates, stories, company insights, and plenty more about Discord, all in one place.
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How Discord stores trillions of messages (2023)
Engineer Bo Ingram shares insight into how Discord shoulders its traffic and provides a platform for our users to communicate.
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Why the Windows Registry sucks technically (2010)
It’s quite popular to bash the Windows Registry in non-technical or lightly technical terms. I’ve just spent a couple of weeks reverse engineering the binary format completely for our h…
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35M Hot Dogs: Benchmarking Caddy vs. Nginx
Have you ever wondered about the performance delta between Caddy and Nginx? Wonder no more.
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Notes on Distributed Systems for Young Bloods (2013)
I’ve been thinking about the lessons distributed systems engineers learn on the job. A great deal of our instruction is through scars made by mistakes made in production traffic. These scars are useful reminders, sure, but it’d be better to have more engineers with the full count of their fingers.
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Intel Processor Instability Causing Oodle Decompression Failures
RAD Game Tools' web page. RAD makes Bink Video, the Telemetry Performance Visualization System, and Oodle Data Compression - all popular video game middleware.
587
Shared Cache Is Going Away
Browsers historically have had a single HTTP Cache. This meant that if www.a.example and www.b.example both used cdn.example/jquery-1.2.1.js then JQuery would only be downloaded once. Since it's the same resource regardless of which site initiates the download, a single shared cache is more efficient. [1]…
588
Everything you ever wanted to know about terminals
so here's a short tutorial on ansi escape codes and terminal control, because you philistines won't stop using ncurses and oh my god WHY ARE WE STILL USING NCURSES IT IS THE TWENTY FIRST FUCKING CENTURY
589
How We Ported Linux to the M1
Virtual iOS, Android, and Arm devices to speed up security testing, research, and DevSecOps for security teams, mobile pentesters, and software developers.
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Cloudflare outage caused by bad software deploy
Starting at 1342 UTC today we experienced a global outage across our network that resulted in visitors to Cloudflare-proxied domains being shown 502 errors (“Bad Gateway”). The cause of this outage was deployment of a single misconfigured rule within the Cloudflare Web Application Firewall (WAF)
593
How Uber Uses Zig
I talked at the first Zig meetup in Milan about Uber's early experience with Zig: a little about how Uber uses Zig and more about my experience of bringing Zig to Uber, from both technical and social aspects.
594
Project Zero: Exploiting the DRAM rowhammer bug to gain kernel privileges
Posted by Mark Seaborn, sandbox builder and breaker, with contributions by Thomas Dullien, revers...
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GC progress from JDK 8 to JDK 17
JDK 17 has been out for a few months and it’s not just packed with new language features. The performance boost compared to older JDK versions is also really significant. It becomes especially clear when compared to the previous LTS releases, JDK 8 and JDK 11. Much of the improved performance comes from new features…
596
Scaling Django to 8 Billion Page Views
At more than 8 billion page views per month and 45k requests per second, we’ve learned a couple things about delivering comments at scale.
597
Patterns of Distributed Systems (2020)
A catalog of patterns to better understand, communicate, and teach the design of distributed systems
598
Facebook open-sources new suite of Linux kernel components and tools
An integral part of Facebook’s engineering culture has always been our development work on open source solutions that solve real-world production issues and address key challenges in modern l…
599
The Majestic Monolith
Monolith by Rene Aigner Some patterns are just about the code. If your code looks like this, and you need it to do that, here’s what to do. You’d do well to study such patterns, as they give you a …
600
Should I buy ECC memory? (2015)
Jeff Atwood, perhaps the most widely read programming blogger, has a post that makes a case against using ECC memory . My read is that his major points are: