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What we learned after a year on Kubernetes
It's been one year since we moved GitLab.com to Kubernetes. We unpack the challenges and learnings from this major migration.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 6,945 posts.
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Async message-oriented systems vs. REST for inter-microservice communications
Why was Mats created, what is the point of using message-based async RPC.
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Kafka vs. Redpanda performance – do the claims add up?
Apache Kafka has been the most popular open source event streaming system for many years and it continues to grow in popularity. Within the wider ecosystem there are other open source and source available competitors to Kafka such as Apache Pulsar, NATS Streaming, Redis Streams, RabbitMQ and more re
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Introducing the B3 JIT compiler
WebKit's FTL JIT now uses a new backend on OS X — the Bare Bones Backend, or B3 for short, replaces LLVM as the low-level optimizer.
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Safely writing code that isn't thread-safe
An under-appreciated Rust feature
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Why is the OpenBSD documentation so good?
In this article, I'm trying to understand what makes the OpenBSD documentation that good.
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Lying to TCP makes it a best-effort streaming protocol
In this All Things Linguistic post Gretchen and Lauren introduce a model dialogue:
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Stack Overflow: How we upgrade a live data center
A few weeks ago we upgraded a lot of the core infrastructure in our New York (okay, it’s really in New Jersey now – but don’t tell anyone) data center. We love being open with everything we do (including infrastructure), and really consider it one of the best job perks we have. So here’s how and why we upgrade a data…
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A Tale of Query Optimization
Last December, I got an interesting bug report from the VWO support team. It seemed like the loading time of a particular analytics report was ridiculously slow for a big Enterprise customer. Since I am part of the Data platform, a flag was immediately raised and I got involved in debugging the issue.
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What is malloc doing, anyway?
malloc has a very nice and simple interface: you ask for a certain amount of memory, and you’re given a void pointer to your block of contiguous bytes that’s been magicked into existence. Once you’re done with it, you call free with the same pointer and the memory disappears into the ether.
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Unpacking Elixir: Resilience
The nine nines. 99.9999999% of uptime. Whether the AXD301 actually deserves to be held up as a system of nine nines seems debatable. I am not particularly interested in that debate. Erlang has a strong record for reliability and a design intended to help you as a developer and operator achieve your nines. Maybe just…
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Why Intel Added Cache Partitioning
Typical server utilization is between 10% and 50%. Google has demonstrated 90% utilization without impacting latency SLAs . Xkcd estimated that Google owns 2 million machines . If you estimate an amortized total cost of $4k per machine per year , that's $8 billion per year. With numbers like that, even small…
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Switch Lowering in GCC
We have seen in a previous post that switch statements are more complex than they seem. The compiler is able to implement them as a decision tree (even though maybe it shouldn't). Is that everything it can do?
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Linux Kernel Development and Writing a Simple Kernel Module (2018)
This post is the first post in linux kernel series. Writing code to run in the kernel is different from user application. While developing in the kernel, you don’t write code from scratch, you need to implement one or more interfaces and register your implementation within the a kernel subsystem.
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It is fast or it is wrong
Fast programs are always fast, slow programs are slow even on a most powerful computers. Knowing that fast solution exists makes slow one plain wrong.
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C++26 Shipped a SIMD Library Nobody Asked For
std::simd Can't Express 90% of Real SIMD Code
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Improving startup time in Atom with V8 snapshots
We are archiving Atom and all projects under the Atom organization for an official sunset on December 15, 2022.
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Async Rust is not safe with io_uring
The demo shows that even though the behavior appears similar, TCP connections leak when using the io_uring driver but not with the epoll driver. I've also tested this across various io_uring runtimes, and it turns out to be a common issue across all of them.
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Bypassing disk encryption on systems with automatic TPM2 unlock
oddlama's personal web page and blog
2515
Update Firmware of Samsung SSDs in Linux
Firmware flash Samsung SSD or NVMe directly from Linux without needing broken Samsung ISO boot environment!
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Modern CPUs have a backstage cast
If you take someone with intermediate knowledge of computing in the right areas, and ask them how an x86 machine boots, they'll probably start telling you about how the CPU first comes up in real mode and starts executing code from the 8086 reset vector of FFFF:FFF0. This understanding of how an x86 machine boots has…
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Distributed Databases Should Work More Like CDNs
Distributed database performance––both latency and uptime––can be dramatically improved with CDN-like multi-region deployments.
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Think twice before encrypting your HFS+ volumes on High Sierra
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