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Linux boot partitions and how to set them up
Posts and writings by Lennart Poettering
Topics /
Infrastructure & DevOps
The most popular blog posts about infrastructure & devops on Hacker News. 1,839 posts.
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mmWave radar, you won't see it coming
Made in Notion, the connected workspace where AI agents and teams organize docs, projects and knowledge together.
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Benchmarking TensorFlow on Cloud CPUs: Cheaper Deep Learning Than Cloud GPUs
Using CPUs instead of GPUs for deep learning training in the cloud is cheaper because of the massive cost differential afforded by preemptible instances.
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FIFA 2014 World Cup live stream architecture
We were given the task to stream the FIFA 14 World Cup and I think this was an experience worth sharing. This is a quick overview about: the architecture, the components, the pain, the learning, th…
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Building a static serverless website using S3 and CloudFront
Hosting static websites is great. As they only contain static assets to be downloaded by the visitor’s browser - think HTML, CSS, Javascript, Fonts, images - no server-side code such as Java or PHP needs to be run. They’re therefore typically faster to load than dynamic websites, they have a smaller attack surface…
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Against /tmp
I commented on Lobsters that /tmp is usually a bad idea , which caused some surprise. I suppose /tmp security bugs were common in the 1990s when I was learning Unix, but they are pretty rare now so I can see why less grizzled hackers might not be familiar with the problems.
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Parsing 10TB of Metadata, 26M Domain Names and 1.4M SSL Certs for $10 on AWS
Last May I was working on hobby project similar to this: https://github.com/zakjan/cert-chain-resolver/. As I found the cert-chain-resolver project a couple of days later I did nothing with the results, but I got some…
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I think GCP is better than AWS (2020)
I originally posted this on Reddit so I could get a good sample of opinions from other engineers to see how they compared to mine before…
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Disasters I've seen in a microservices world
When Martin Fowler's post about microservices came out in 2014, the teams where I worked were already building service-oriented architectures. That post and the subsequent hype made their way into almost every software team in the world. The "Netflix OSS stack" was the coolest thing back then, allowing engineers…
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Ubuntu 22.04 LTS servers and phased apt updates
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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So You Wanna Go On-Prem
If you run a successful SaaS platform, at some point someone is going to come to you with the question: can I run it myself? If you’re considering offering a private version of your SaaS, this post might be for you.
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EC2's most dangerous feature
A review for readers unfamiliar with this feature: Amazon IAM ( Identity and Access Management ) is a service which allows for the creation of access credentials which are limited in scope; for example, you can have keys which can read objects from Amazon S3 but cannot write any objects. IAM Roles for EC2 are a…
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Learning containers from the bottom up
What is a Container? Container vs. VM? Docker vs. Kubernetes. How to organize the learning efficiently?
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Using a catch-all domain is a mistake
After about a decade of dealing with this madness, surely it's been worthwhile? No, not really.
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The Container Throttling Problem
This is an excerpt from an internal document David Mackey and I co-authored in April 2019. The document is excerpted since much of the original doc was about comparing possible approaches to increasing efficency at Twitter, which is mostly information that's meaningless outside of Twitter without a large amount of…
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AWS IAM Roles, a tale of unnecessary complexity
This is going to be a highly opinionated blog post. I think AWS is great and use it daily, but their implementation of IAM is unnecessarily complicated.
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What happens when you update your DNS
What happens when you update your DNS?
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How to handle 1000s of concurrent users on a 360MB VPS
There has been some recent confusion about how much memory you need in a web server to handle a huge number of concurrent requests. I also made a performance claim on the STS list that got me an unusual number of private emails.
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Problems with “graceful shutdown” in Kubernetes (2019)
Grace is overrated
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Farewell to the Era of Cheap EC2 Spot Instances
AWS EC2 Spot prices have surged since the start of 2023. In this article I investigate this trend, possible causes, and how AWS customers can improve their deployments to get the maximum discount possible.
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The order of files in /etc/ssh/sshd_config.d/ matters
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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How much is Spotify paying Google Cloud?
Two weeks ago, Spotify announced it was migrating from its own datacentres to Google Cloud Platform.
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Overengineering my homelab so I don't pay cloud providers
After years on a VPS, I'm moving my self-hosted services home and using the opportunity to migrate to a more flexible and robust setup.
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Repurposing an old Android phone as a web server
A programmer's blog with posts about Ruby, web development, algorithms and data structure.