Hacker News: sleepydog

New comment by sleepydog in "PCB devboard the size of a USB-C plug"

sleepydog — Mon, 09 Mar 2026 06:09:18 +0000

This is an stm32l432kc in the form of a yubikey nano.

New comment by sleepydog in "QUIC and the end of TCP sockets"

sleepydog — Thu, 09 Oct 2025 13:56:43 +0000

I guess you are referring to the TLS requirement? I guess I could see how on a more restrictive platform like a phone you could conceivably be prevented from accepting alternate CAs or self signed certificates.

New comment by sleepydog in "Google's Liquid Cooling"

sleepydog — Mon, 25 Aug 2025 19:26:28 +0000

AWS had a similar article a couple months ago:

https://www.aboutamazon.com/news/aws/aws-liquid-cooling-data...

In either case I cannot find out how they dump the heat from the output water before recycling it. That's a problem I find far more interesting.

New comment by sleepydog in "GitHub pull requests were down"

sleepydog — Tue, 05 Aug 2025 16:36:19 +0000

... or get out.

New comment by sleepydog in "QUIC for the kernel"

sleepydog — Thu, 31 Jul 2025 21:51:02 +0000

Encryption gets you data integrity "for free". If a bit is flipped by faulty hardware, the packet won't decrypt. TCP checksums are not good enough for catching corruption in many cases.

New comment by sleepydog in "Two guys hated using Comcast, so they built their own fiber ISP"

sleepydog — Mon, 14 Jul 2025 18:32:39 +0000

The EU is better on average, but isn't universally great either. I pay 60 EUR for 200Mbit down/20Mbit up ADSL in Amsterdam, after my 6-month discount ran out. No fiber in my neighborhood yet. There's one gigabit provider in my neighborhood (Ziggo) and they have a bad reputation. For the same price I was getting FiOS gigabit in NYC.

New comment by sleepydog in "At Amazon's biggest data center, everything is supersized for AI"

sleepydog — Fri, 11 Jul 2025 12:36:34 +0000

For very hot data centers, evaporative cooling is still popular. This is from 2012 but I doubt much has changed.

https://blog.google/outreach-initiatives/sustainability/gett...

New comment by sleepydog in "OpenAI to buy AI startup from Jony Ive"

sleepydog — Wed, 21 May 2025 18:10:08 +0000

Don't sell yourself short. If you have eyes and a voice, you can learn to read sheet music and hum a tune.

New comment by sleepydog in "Changes since congestion pricing started in New York"

sleepydog — Wed, 14 May 2025 22:28:02 +0000

The traffic has a negative effect on more than just car owners--smog, noise, accidents, slower taxis, to name a few. Why should only car owners, who are a minority in Manhattan, vote on a problem that affects everyone?

New comment by sleepydog in "Ask HN: What are you working on? (April 2025)"

sleepydog — Mon, 28 Apr 2025 14:25:06 +0000

I'm working on a multicast dns implementation in OCaml. It's a library allowing one to build custom queries/responders, plus a conventional querier that can be used as a stub resolver for .local to get the resolver functionality of avahi.

My main motivation was to implement a service that publishes the addresses of containers and vms that I run on my workstation to my local network, but it gradually has grown into a full-blown implementation of RFC 6762, which has been fun.

New comment by sleepydog in "Understanding DNS Resolution on Linux and Kubernetes"

sleepydog — Wed, 26 Mar 2025 22:18:17 +0000

I didn't dig into it too deeply at the time, but I think part of it was that you don't need to open and write to a socket, so that's avoiding some system calls (socket(), bind(), sendto(), close()). IIRC we had nscd set up so clients directly read from shared memory that nscd kept updated, rather than getting requests over a socket.

There's also probably some savings around not having to convert between the structures used by gethostbyname and DNS questions&answers.

New comment by sleepydog in "Understanding DNS Resolution on Linux and Kubernetes"

sleepydog — Wed, 26 Mar 2025 14:56:38 +0000

I used to work for a huge email sender (constant contact). Our mail servers needed to perform an absurd number of lookups while receiving and validating mail. When I was there, we used dnscache, running locally, on all our mail servers. But even with a local dnscache, the overhead of making DNS requests and handling their responses was high enough that adding nscd made a noticeable improvement in CPU usage.

New comment by sleepydog in "A Sneaky Phish Just Grabbed My Mailchimp Mailing List"

sleepydog — Tue, 25 Mar 2025 10:04:39 +0000

For the read-only, newsletter-type mailing lists, this makes sense and I do it too. But for mailing lists that are used more as a forum, I like posting with a recognizable, memorable email address. I've gotten some really sweet emails from people who read a post I made and reached out to me directly in the past. I wouldn't want to miss those, spam be damned.

New comment by sleepydog in "AMC Theatres will screen a Swedish movie 'visually dubbed' with the help of AI"

sleepydog — Sun, 23 Mar 2025 01:11:19 +0000

I noticed Netflix doing this while watching this series: https://about.netflix.com/news/beyond-goodbye-premieres-nove...

It was so jarring I couldn't watch it and switched to Japanese with subtitles. Their mouths looked so stiff and unnatural and out of sync with their expressions that all me and my wife could talk about was how bad it looked.

New comment by sleepydog in "Avoid ISP Routers (2024)"

sleepydog — Sun, 02 Feb 2025 10:26:17 +0000

I got a monthly discount (small, between 5 and 10$) for using my own cable modem in Sunnyvale. I was using Comcast business, though.

New comment by sleepydog in "Stanley Kubrick's the Shining Maps of the Overlook"

sleepydog — Wed, 11 Dec 2024 11:15:08 +0000

I remember enjoying this video essay on the shining and the spacial anomalies in the overlook hotel. It contains snippets of a recreation of the impossible hotel in a Duke Nukem 3D map.

https://www.collativelearning.com/the%20shining.html

New comment by sleepydog in "Digging into PlantStudio, a Bit Late"

sleepydog — Tue, 29 Oct 2024 23:52:45 +0000

Fixed, thank you

New comment by sleepydog in "Digging into PlantStudio, a bit late"

sleepydog — Tue, 29 Oct 2024 22:02:52 +0000

> Because the last release of the app was in 2002, and it was for Windows 95/98/2000/NT4, we’ve got a little bit of work to do to get it running on macOS

Much of today's software is going to be nothing more than a memory 22 years from now, after their authors run out of funding and they turn down the saas infrastructure that they shoehorned into it for that sweet, sweet recurring income. And more likely than not, we'll still be able to run this program from 2002, in 2046.

New comment by sleepydog in "The future of software is Nix"

sleepydog — Fri, 25 Oct 2024 19:33:47 +0000

I think guix was just late to the party and the extra steps to setup the nonguix for the non free software like steam is enough of a deterrent for users to go to nix instead.

I use guix myself and prefer its use of scheme. I don't mind having a little less guidance and "how-to" articles available if I'm trying something new because I'm comfortable reading its codebase.

New comment by sleepydog in "Fearless SSH: Short-lived certificates bring Zero Trust to infrastructure"

sleepydog — Thu, 24 Oct 2024 11:26:09 +0000

It's a good mindset to have, but I think ssh access should still be available as a last resort on prod systems, and perhaps trigger some sort of postmortem process, with steps to detect the problem without ssh in the future. There is always going to be a bug, that you cannot reproduce outside of prod, that you cannot diagnose with just a core dump, and that is a show stopper. It's one thing to ignore a minor performance degradation, but if the problem corrupts your state you cannot ignore it.

Moreover, if you are in the cloud, part of your infrastructure is not under your control, making it even harder to reproduce a problem.

I've worked with companies at Netflix's scale and they still have last-resort ssh access to their systems.