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marcusb

3,342 karma · joined August 12, 2016

I mainly do backend development in Rust.

You can find me online at a few other places:

* Email: marcusb@marcusb.org

* Blog: https://marcusb.org

* Mastodon: https://mastodon.sdf.org/@marcusb

Certified “AI hater” — Ars Technica

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[ my public key: https://keybase.io/marcusb; my proof: https://keybase.io/marcusb/sigs/M6JD8qft2hLYGUHk57yfm5NG9pN-BrilfjCak7rFOl4 ]

submissionscomments
marcusb··on Tennessee man arrested, accused of threatening a shooting, after posting meme
As they say, you can beat the rap, but you can't beat the ride.
marcusb··on GNU Health
In the US, the Veteran's Administration wrote their own EHR (Vista) which was released as public domain. They've been trying (and mostly failing) to migrate to a commercial EHR for the last seven or eight years.
marcusb··on Fire destroys S. Korean government's cloud storage system, no backups available
> * Everyone involved is unlikely to find work again anytime soon once names are bandied about in investigations

They might (MIGHT) get fired from their government jobs, but I'll bet they land in consulting shops because of their knowledge of how the government's IT teams operate.

I'll also bet the internal audit team slides out of this completely unscathed.

marcusb··on Circular Financing: Does Nvidia's $110B Bet Echo the Telecom Bubble?
> I think a T1 went from 1800 a month in 1996, to around 600 a month in 1999. It was a long time ago, so my memory is hazy.

It varied a lot by region. At the mom and pop ISP I worked at, we went from paying around $1,500/month for a T1 to $500 to, eventually around $100/month for the T1 loop to the customer plus a few grand a month for an OC12 SONET ring that we used to backhaul the T1 (and other circuits) back to our datacenter.

But, all of it was driven by the Telecommunications Act requirement for ILECs to sell unbundled network facilities - all of the CLECs we purchased from were using the local ILEC for the physical part of the last mile for most (> 75%) of the circuits they sold us.

One interesting thing that happened was that for a while in the late 90’s, when dialup was still a thing, we could buy a voice T1 PRI for substantially less than a data T1 ($250 for the PRI vs $500 for the T1.) The CLEC’s theory was our dialup customers almost all had service from the local ILEC, and the CLEC would be paid “reciprocal compensation” fees by the ILEC for the CLEC accepting calls from them.

In my market, when the telecommunications act reform act was gutted, the ILEC just kept on selling wholesale/unbundled services to us. I think they had figured out at that point that it was a very profitable line of business if they approached it the right way.

marcusb··on Cracker Barrel Outrage Was Almost Certainly Driven by Bots, Researchers Say
Most (all?) commercial social networks sell ads. Outrage-farm bots drive activity in two ways: the bot traffic itself and human response to the outrage bait.

I think the sad truth is the bots are good for business.

marcusb··on Thoughts on Mechanical Keyboards and the ZSA Moonlander
For anyone curious about this, the tenting solution is available here[0].

I wrote about it in my review of the Moonlander[1]. In short, in addition to much more stable angle adjustment, you get an additional 46 degrees of adjustment (11 degrees with the tent legs vs 57 degrees with the platform kit.)

It does tend to slide around a bit on a smooth desk, but I solved that with some rubber matting glued to the bottom.

0 - https://www.zsa.io/moonlander/platform

1 - https://marcusb.org/posts/2025/08/two-years-with-the-zsa-moo...

marcusb··on Are top CEOs underpaid? (2019)
> Maybe 12 pizzas altogether
marcusb··on This map is not upside down
They did, they just understood they were editing English not Latin.
marcusb··on Office CMBS Delinquency Rate Spikes to Record 11.7%
> Are these mortgages backed by the underlying real estate?

Yes.

> 62 million / 850 = 80k per unit. Seems easy to cover?

I imagine if the owner could sell at that price they would. The value of apartment buildings, broadly speaking, is based on net operating income divided by a market-specific capitalization rate. The math might just not work for new owners based on the prevailing interest rate and rent environment, or the NOI and cap rate might make the selling price untenable for the current owners.

marcusb··on Clankers Die on Christmas
Apparently. See, for example, https://www.salon.com/2025/08/19/is-clanker-a-slur-anti-robo...
marcusb··on After nearly half a century in deep space, every ping from Voyager 1 is a bonus
It’s Quieter in the Twilight is really good as well.

https://itsquieterfilm.com/

marcusb··on What is the origin of the private network address 192.168.*.*? (2009)
I think so.

It also disruptive to anyone who comes here and sees replies to a deleted comment and can't see the context.

marcusb··on What is the origin of the private network address 192.168.*.*? (2009)
I don't think this does anything to explain why 192.168/16 was chosen specifically. Three netblocks (10/8, 172.16/12, and 192.168/16) were selected from the class A, B, and C address spaces to accommodate private networks of various sizes. Class C addresses by definition have the two most significant bits set in their first octet and the third set to 0 (i.e., 192 - 223.)

192 in the first octet starts the class C space, but 10 and 172 do not have the same relationship in classes A and B.

marcusb··on What is the origin of the private network address 192.168.*.*? (2009)
How would you express that in an IPv4 header? These address ranges serve a real purpose.

edit: OP: just like the downvote button is not for disagreement, the delete button is not for karma management. Not sure why you would respond to my post here and then immediately delete it.

marcusb··on What is the origin of the private network address 192.168.*.*? (2009)
It isn't an article, but a mailing list post, and the post starts out with:

  This is a fuzzy recollection of something I believe I read, which might well be inaccurate, and for which I can find no corroboration.  I mention it solely because it might spark memories from someone who actually knows:
Spoiler: it sparks one memory from one person, who winds up being mistaken.

Offering an alternative hypothesis seems reasonable given the content of the post.

marcusb··on I bought the cheapest EV, a used Nissan Leaf
I'll keep that in mind.
marcusb··on I bought the cheapest EV, a used Nissan Leaf
As I said before, “citation please.”
marcusb··on I bought the cheapest EV, a used Nissan Leaf
Citation please. It takes over seven hours to drive 500 miles non-stop at 70mph. I’d love to see a credible source that documents “a lot” of people are routinely driving this far in their personal vehicles.
marcusb··on I'm absolutely right
“I see the problem now! <proceeds to hallucinate some other random, incorrect nonsense>”
marcusb··on I bought the cheapest EV, a used Nissan Leaf
> Nothing done by choice is annoying obviously.

Right, so that covers approximately 100% of EV owners.

marcusb··on I bought the cheapest EV, a used Nissan Leaf
Maybe its tiring for you. What’s tiring for me is that in every single one of these threads, people bring up the most extreme, outlier situations (500 mile trips) as a cudgel against EVs.
marcusb··on I bought the cheapest EV, a used Nissan Leaf
Your friend probably had an SL-trimmed Leaf. The car in the video is an SV, which has cloth seats, etc. Interestingly, it looks like Nissan no longer offers the nicer trim levels for the Leaf, only S and SV PLus (at least as of 2025.)
marcusb··on I bought the cheapest EV, a used Nissan Leaf
I've driven an EV on 500 mile trips. Getting out and stretching your legs for 20-25 minutes once every three hours isn't "super annoying." If all I did was drive around all day, every day for 500 miles at a stretch, it might be, but not nearly as annoying as routinely driving for 500 miles.

For most people, the vast majority of their driving takes place well within the range of the typical BEV and range anxiety is a total non-issue. The fact is, even accounting for the occasional long trip, I spend less time at charging stations than I did at gas stations when I owned an ICE car, because the vast majority of the time, I just plug the car in at my house and let it do its thing.

marcusb··on Meta is spending $10B in rural Louisiana to build its largest data center
They said gas over coal. If you accept the claim that GHG emissions from gas and coal are roughly equal, their claim is the other pollutants from burning coal make gas far more preferable.
marcusb··on Ghrc.io appears to be malicious
No.
marcusb··on Building A16Z's Personal AI Workstation
It'll lose another half if you spray paint it gold like in the OP photos.
marcusb··on Building A16Z's Personal AI Workstation
A rough price out using new egg/microcenter pricing, substituting a few items where they didn't specify a specific item/brand. I didn't bother trying to figure out what case they used.

Grand total: ~ $41,000

Motherboard https://www.newegg.com/gigabyte-mh53-g40-amd-ryzen-threadrip... $895

CPU https://www.microcenter.com/product/674313/amd-ryzen-threadr... - $3500

Cooler https://www.newegg.com/p/3C6-013W-002G6 $585

RAM https://www.newegg.com/a-tech-256gb/p/1X5-006W-00702 $1600

SSDs https://www.newegg.com/crucial-2tb-t700-nvme/p/N82E168201563... $223 x 4 = $892

GPUs https://www.newegg.com/p/N82E16888892012 - $8295 x 4 = $33,180

Case https://www.newegg.com/fractal-design-atx-full-tower-north-s... $195

Power Supply https://www.newegg.com/thermaltake-toughpower-gf3-series-ps-... - $314

marcusb··on The ROI of Exercise
>So, what's the secret?

There isn't one. Its a trade-off. I get up between 4:15 and 4:45 (depending on the day) to exercise. I go to bed between 9 and 10 pm (usually 9:30.) I exercise with a group of people, and that ends up being most of my socializing time. 5 - 9 is family time.

marcusb··on The ROI of Exercise
Grew up in a very poor town in Arkansas. Had a public tennis court literally next door. In the 80s, the tennis court saw frequent use. People would get mad when they lost a match or whatever and hit the balls into our yard.

My grandmother would go collect them, and we always had a basket full of balls by the door.

By the early 2000s, people stopped using the tennis court very often, and the city tore down the chain link fence around the court to use as overflow parking for the adjacent little league fields.

marcusb··on How Not to Buy a SSD
Not always - some passenger vehicle filters have exposed media. An example GM filter: https://parts.gmc.com/product/acdelco-gm-original-equipment-...

My current car has a traditional steel-can filter. I cut those open after oil changes to inspect for debris.

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