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Syslog: Complete System Administrator Guide
Complete Guide on understanding the Syslog protocol, syslog message format as well as log forwarding. Best practices included!
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The latest blog posts to take off on Hacker News. 6,948 posts.
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Modern Text Rendering with Linux
Introduction
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From 30 to 230 Docker containers per host
I could not find much information on the interwebs how many containers you can run per host. So here are mine and the issues we ran into along the way.
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Killing a process and all of its descendants
Killing processes in a Unix-like system can be trickier than expected. Last week I was debugging an odd issue related to job stopping on Semaphore. More specifically, an issue related to the killing of a running process in a job.
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John Carmack on Parallel Implementations (2018)
ps aux | more
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Fast and flexible observability with canonical log lines
Canonical log lines are a lightweight, flexible, and technology-agnostic technique for observability that are powerful and easy to implement.
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High-performance, exactly-once, failure-oblivious distributed programming (2018)
This is one post in a series about programming models and languages for distributed computing that I’m writing as part of my history of distributed programming techniques.Relevant ReadingTrill: A h...
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Lock-free multithreading with atomic operations
Synchronizing threads at a lower level.
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Perils of Constructors
One of my favorite blog posts about Rust is Things Rust Shipped Without by Graydon Hoare. To me, footguns that don't exist in a language are usually more important than expressiveness. In this slightly philosophical essay, I want to tell about a missing Rust feature I especially like: constructors.
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Raspberry Pi microSD follow-up, SD Association fools me twice?
/ Fool me once, shame on you. Fool me twice, \ \ prepare to die. (Klingon Proverb) / -------------------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || (Excerpt from Ansible for DevOps, chapter 12.) The fallout from this year's microSD card performance comparison has turned into quite a…
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Fast Software, the Best Software
Essay on the benefits of speedy software, and how it affects user perception of engineering quality and overall usability
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Composable multi-threaded parallelism in Julia
Software performance depends more and more on exploiting multiple processor cores....
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Files Are Fraught with Peril
This is a psuedo-transcript for a talk given at Deconstruct 2019. To make this accessible for people on slow connections as well as people using screen readers, the slides have been replaced by in-line text (the talk has ~120 slides; at an average of 20 kB per slide, that's 2.4 MB. If you think that's trivial…
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A2-class microSD cards offer no better performance for the Raspberry Pi
Update: See follow-up post about A1 vs A2 performance, Raspberry Pi microSD follow-up, SD Association fools me twice?. After I published my 2019 Raspberry Pi microSD card performance comparison, I received a lot of feedback about newer 'A2' Application Performance class microSD cards, and how they could produce even…
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Race Condition vs. Data Race (2011)
It’s terribly punny/dorky of me, but reading your post it just occurred to me one could start a blog called “Race Condition” about being a person of color and being a computer scientist.
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How Computers Boot Up (2008)
The previous post described [motherboards and the memory map] memory-map in Intel computers to set the scene for the initial phases of boot. Booting is an involved, hacky, multi-stage affair - fun st
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Fsyncgate: Errors on fsync are unrecoverable (2018)
This is an archive of the original "fsyncgate" email thread. This is posted here because I wanted to have a link that would fit on a slide for a talk on file safety with a mobile-friendly non-bloated format .
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Modern text rendering with Linux: Part 1
Introduction
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Understanding Docker Container Escapes
Trail of Bits recently completed a security assessment of Kubernetes, including its interaction with Docker. Felix Wilhelm’s recent tweet of a Proof of Concept (PoC) “container escape” sparked our interest, since we performed similar research and were curious how this PoC could impact Kubernetes. Quick and dirty way…
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ZFS on Linux still has annoying issues with ARC size
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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Faster, cheaper, and better: A story of breaking a monolith
On May 21st 2019, we broke search service out of vehicle-service. It was faster, cheaper, and better!
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OpenSSH taking minutes to become available, booting takes half an hour (2018)
So, your machine now needs minutes to boot before you can ssh in where it used to be seconds before the Debian Buster update?