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Building a Database in the 2020s (2022)
Building a database in the 2020s
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,944 posts.
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Linux CVEs, more than you ever wanted to know
It’s been almost 2 full years since Linux became a CNA (Certificate Numbering Authority) which meant that we (i.e. the kernel.org community) are now responsible for issuing all CVEs for the Linux kernel. During this time, we’ve become one of the largest creators of CVEs by quantity, going from nothing to number 3 in…
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Notes on concurrency bugs
Do concurrency bugs matter? From the literature, we know that most reported bugs in distributed systems have really simple causes and can be caught by trivial tests, even when we only look at bugs that cause really bad failures, like loss of a cluster or data corruption. The filesystem literature echos this result …
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118M Queries per Second on Neki
We ran a massive, sharded Postgres database at 118.5 million queries per second, with 200k queries per second on each shard across 512 shards.
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Why does MPEG Transport Stream still exist?
MPEG-TS is still used extensively, even in “modern” transport mechanisms such as SRT, RIST and Zixi. Why though?
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Reducing Chrome crashes caused by third-party software
Update (04/26/2019): Third-party developers can now use this document to evaluate the impact of third-party blocking on their software. R...
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Apache Pinot 1.0
Introducing Apache Pinot 1.0 Release
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Big problems at the timezone database
The last time I wrote about the timezone database on this blog, the database was under threat from a lawsuit. Fortunately that lawsuit w...
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Introduction to sysclean(8)
sysclean(8) is a system tool designed for help system administrator to keep their OpenBSD clean after upgrade.
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Upgrading a motherboard’s BIOS/UEFI (the hard way)
A couple of weeks ago I found a really good deal on a Socket AM4 motherboard that supports the newest AMD Ryzen CPUs. The motherboard is an ASRock A520M/ac . It’s a very basic motherboard which doesn’t appear to be sold by any of the usual retailers anymore, but I couldn’t pass up on the deal, especially with the…
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Bit Patterns of Float
I’ve spent too many hours repeatedly trying to find this information on the Web. Time to write it down.
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How to run a city builder on 16 MHz
Do you feel spoiled by modern hardware? I know I do. Even the cheapest CPUs have at least 4 cores nowadays, running billions of operations per second. The idea that you could run any software on le…
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Bump Allocation: Up or Down?
Back in 2019, Nick Fitzgerald published always bump downwards, an article making the case that for bump allocators, bumping “down” (towards lower addresses) is better than bumping up. The biggest reasons for this are bumping up requires 3 branches vs 2 for bumping down and rounding down requires fewer instructions…
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PigPaxos: Removing the Scalability Bottlenecks in Paxos
This is our most recent work, started and led by Aleksey Charapko . (This is a joint post with him.) You can get the paper at arxiv.org . Th...
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Thrashing
I’ve invested in a new odometer to help my car go faster. Accountability is important, and as a driver I believe the most important thing I can do is set measurable, achievable and inspiring goals for the people pushing my car down the road.
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Demystifying programs that create programs, part 1: A disassembler
People appear to enjoy the blog posts about me porting different compilers to OpenBSD . What I would like to do for the next couple of posts beginning with this one is to take a step back and de-complexify these programs. Both the D compiler and the GNU Modula-2 compiler are highly complex pieces of software. But at…
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Designing Resilient Systems: Circuit Breakers or Retries?
Grab designs fault-tolerant systems that can withstand failures allowing us to continuously provide our consumers with the many services they expect from us.
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Arcan Display Server 0.6.2 – It’s all connected
This release should put us at about half way through the planned work for the networking focus set of releases (0.6.x), a scope roughly defined by the article on A12: Advancing network transparency…
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Unicorn Unix Magic Tricks
This post is based on the talk of the same name I gave at the Arrrrcamp conference in Ghent, Belgium on October 2nd, 2014. You can find the slides here and the video recording here .
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How to bring up the Linux Kernel on a new platform
A guide to bringing up the Linux Kernel and a userspace application on a new hardware (or in this case, a self-made emulator)
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Race you to the kernel
Posted by Ian Beer of Google Project ZeroThe OS X and iOS kernel code responsible for loading a s...
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Resilience in Complex Systems (2021)
Everyday human reasoning breaks down as the scale of time and space at play increases. Complex systems thinking gives us a new set of tools to better understand the chains of consequences involved, and make better decisions.