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Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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Elasticsearch was never a database
Elasticsearch is a search engine, not a database. Here's why it falls short as a system of record.
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The Soul of an Old Machine: Revisiting the Timeless von Neumann Architecture
Revisiting the timeless von Neumann Architecture
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HTAP is Dead
Databricks offers a unified platform for data, analytics and AI. Build better AI with a data-centric approach. Simplify ETL, data warehousing, governance and AI on the Data + AI Platform.
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Building the largest known Kubernetes cluster
Learn about the architectural innovations we used to build a 130,000-node Kubernetes cluster, and the trends driving demand for these environments.
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The lost malloc()
Prompted by another project idea that popped into my mind, I did some Unix archaeology and looked at the original sources . This is the most fun I've ever had reading someone else's code - probably due to the historical significance. But also because of how delightfully approachable it was, compared to modern…
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Jepsen: Radix DLT 1.0-Beta.35.1
Radix DLT (Distributed Ledger Technology) is a distributed ledger: a serializable log of transactions over a state machine, along with mechanisms for querying that state. Throughout this report, “Radix” refers to the Radix DLT software .
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Amazon Launches New RabbitMQ Message Broker Service
In 2017, we launched Amazon MQ – a managed message broker service for Apache ActiveMQ, a popular open-source message broker that is fast and feature-rich. It offers queues and topics, durable and non-durable subscriptions, push-based and poll-based messaging, and filtering. With Amazon MQ, we have enhanced lots of new…
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How x86_64 Addresses Memory
Update 2025-03-05 : @jxu has shared a collection of simplified examples that are even easier to follow than the original ones in this post.
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Making Sense of Acquire-Release Semantics
Multiprocessor Synchronization was one of my favorite classes during my undergrad — it had a clear progression from theory to practice, starting at the theory of consensus numbers and moving onto atomic operations and then synchronization primitives and lock-free data structures, all from first principles. With…
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Durability: NVMe Disks
Durability is the guarantee that data can be accessed after a failure. It seems like this should be very simple: either your system provides durable data storage, or it does not. However, durability is not a binary yes/no property, and instead should be defined as the kinds of failures you want your data to survive…
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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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Debian Riscv64 port in mid 2019
It's been a while since last post (Talk about the Debian GNU/Linux riscv64 port at RISC-V workshop), and sometimes things look very quiet from outside even if the people on the backstage never stop working. So this is an update on the status of this port before the release of buster, which should happen in a few weeks…
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Unix Shell Programming: The Next 50 Years
This week’s paper won the distinguished presentation award at HotOS 2021, and discusses the potential for future innovation in the tool that many use every day - the shell! A previous submission of this paper on Hacker News elicited a number of strong reactions. One reaction was the assertion that there are in fact…
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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.
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GPU synchronization in Godot 4.3 is getting a major upgrade
Say goodbye to placing barriers, hello to the new acyclic graph
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DragonFly BSD 5.2
DragonFly version 5.2 brings Meltdown/Spectre mitigation, significant improvements to HAMMER2, ipfw, and graphics acceleration. 5.2.1 includes a fix for CVE-2018-8897 , and 5.2.2 includes a fix for the LazyFP bug, CVE-2018-3665 .
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My fast zero-allocation webserver using OxCaml
Building httpz, a high-performance HTTP/1.1 parser with zero heap allocation using OxCaml's unboxed types, local allocations, and mutable local variables.
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In Praise of Alpine and APK
Since the change of year, I’ve been using Alpine Linux on my main computing device (a new desktop PC that I assembled in December). These are some notes on in, some niceties and caveats.
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On Building A Stupidly Fast Graph Database
It’s pretty clear to computer science geeks that Directed Edge is supposed to be doing groovy things with graphs. In fact our recommendation engine, and some of the things that are unique about our approach to recommendations, are built on our super-fast graph database. When we went live yesterday with the latest…
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Fast CSV Processing with SIMD
I recently learned of csvquote , a tool that encodes troublesome CSV characters such that unix tools can correctly process them. It reverses the encoding at the end of the pipeline, recovering the original input. The original implementation handles CSV quotes using the straightforward, naive method. However, there’s a…
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There's a mini RTOS in my language
AdaCore is the leading provider of commercial software solutions for Ada, C and C++ — helping developers build safe and secure software that matters.
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TCP Fast Open? Not so fast
As TCP becomes more important to DNS, overhead is becoming an issue.