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Moving a billion Postgres rows on a $100 budget
Inspired by the 1BR Challenge, I wanted to see how much it would cost to transfer 1 billion rows from Postgres to Snowflake. Moving 1 billion rows is no…
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The latest blog posts to take off on Hacker News. 569 posts.
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SSDs have become fast, except in the cloud
A blog by and for database architects.
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Writing a scheduler for Linux in Rust that runs in user-space
Overview I’ve decided to start a series of blog posts to cover some details about scx_rustland , my little Linux scheduler written in Rust ...
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In Defense of Simple Architectures (2022)
Wave is a $1.7B company with 70 engineers 1 whose product is a CRUD app that adds and subtracts numbers. In keeping with this, our architecture is a standard CRUD app architecture, a Python monolith on top of Postgres. Starting with a simple architecture and solving problems in simple ways where possible has allowed…
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A small Rust binary indeed (2022)
Can we make a Rust program that's as small as it's assembler equivalent?
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Zed Editor: All Occurrences Search from 1s to 4ms
So zero-cost abstractions exist?
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Wddbfs – Mount a SQLite database as a filesystem
Often when I’m prototyping a project, I hesitate to use a sqlite database despite their many adavantages . It seems much easier to just dump a bunch of files in a directory and to rely on the universal support for the filesystem API to read/delete/update records. Part of this is avoiding the overhead of figuring out a…
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Nebula is not the fastest mesh VPN, but neither are the others
(But neither are any of the others)
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Options for genuine ECC RAM on the desktop in (early) 2024
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…
490
Recording and visualising the 20k system calls it takes to "import seaborn"
Last time we counted CPU instructions, let’s look at syscalls now!
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Ledger: Stripe's system for tracking and validating money movement
Technical details on how Stripe built Ledger, a state-of-the-art money movement tracking system, including how teams at Stripe interact with the data quality metrics that underlie our payment processing network.
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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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We sped up time series by 20-30x
This is a follow up post that dives into how we managed to achieve such huge performance gains for time series (among other things), and why it was so hard in the first place.
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Linux/ELF .eh_frame from the bottom up
Given the current register state for a thread, and read-only access to memory, what would the register state hypothetically become if the current function was to immediately return and execution was to resume in its caller?
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vDPA: Support for block devices in Linux and QEMU
Using libblkio, QEMU Storage Daemon, and VDUSE
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Systemd by Example (2021)
The first article in a series where I explore aspects of systemd by creating small examples with the help of containers.
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It Can Be Done (2003)
A story about quality from the development of the Multics operating system.
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Minimal Linux Bootloader debugging story
I maintain two builds of the Linux kernel, a linux/arm64 build for gokrazy, my Go appliance platform, which started out on the Raspberry Pi, and then a linux/amd64 one for router7, which runs on PCs. The update process for both of these builds is entirely automated, meaning new Linux kernel releases are automatically…
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Building the DirectX shader compiler better than Microsoft?
This is a story about the messy state of Microsoft’s DirectX shader compiler, and trying to wrangle it into a nicer experience for game developers. In some respects, building the DXC compiler better than how Microsoft does.
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Power of small optimizations
In this post, I will talk about the importance of small optimizations that can provide a lot of performance improvements.
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Fedora Atomic Desktops
Announcing a new family of Fedora Linux spins: Fedora Atomic. This will simplify how to discuss rpm-ostree and naming of future atomic spins.
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What's Inside a Linux Kernel Core Dump
An extremely thorough explanation of what's contained inside a Linux kernel core dump.
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Sudo for Windows
Introducing Sudo for Windows We're excited to announce the release of Sudo for Windows in Windows 11 Insider Preview Build 26052! Sudo for Windows is a
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A distributed systems reading list
An old document I surfaced with my quick tour of distributed systems theory fundamentals
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How QUIC is displacing TCP for speed
What is QUIC protocol and how does it work ?
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Context Control in Go
Best practices for handling context plumbing in Go
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Lamport Clocks
Last weekend I wanted to get some inspiration to write some TLA+ spec and I got my hands back on the paper Time, Clocks, and the Ordering of Events...
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Simple Precision Time Protocol at Meta
While deploying Precision Time Protocol (PTP) at Meta, we’ve developed a simplified version of the protocol (Simple Precision Time Protocol – SPTP), that can offer the same level of clock syn…