Badabinski

Yeah, the lifespan and ability to leave a flywheel “discharged” makes me wish I could have one for my homelab (as unrealistic as that might be). I have a solar generator as a battery backup, but it’s not a true UPS with a fast transfer switch (I needed at least 3kWh of capacity for long power outages, my max draw is like 600 watts before I finish load shedding). Most of my servers can tolerate the brief voltage sag, but my R640 chokes and dies. My battery is hooked up to one of my PDUs, and I’d love to have a flywheel hooked up to the other PDU. The battery would be fully transitioned by the time the flywheel was discharged.

On the point of safety, I have a question. I feel like it’s probably easier to prove that a flywheel system is deenergized, but there is the very slight risk of confinement loss. With a chemistry like Lithium Iron Phosphate that can’t sustain a flame and doesn’t produce flammable gasses, do you feel that batteries might begin to approach the safety of flywheels? It sounds like you have actual experience with flywheel systems, so I’m quite curious.

EDIT: holy shit, someone is actually selling a 300 KVA flywheel system on eBay for $30,000. I wonder who the hell would buy something like that used.

EDIT: I said “very slight risk” of confinement loss, and I should probably correct myself. The risk is ridiculously, stupidly small for a system like I linked above. Maybe the bigger systems that get buried and have concrete poured on them are riskier, but I don’t know if people even do that anymore for datacenters.

Full disclosure, I haven’t watched the video, I’m just going off of the other comments. Mechanical energy storage is definitely already a thing. Flywheels are the past, present, and future of energy storage in certain niches. My dad was a PM for IBM for many years and told me all about installing them while building out datacenters in the 90s. They’re great for powering large loads while a generator spins up. They’re, uh, not really that great for multi-day storage. You’re going to lose energy no matter what. Magnetic bearings won’t help this, they still have something analogous to friction.

Anything other than batteries or pumped hydro is probably a fool’s errand when it comes to grid-level storage. You’re not going to make a crane big enough to compete with millions of gallons of water pumped up a hill. You’re not going to be able to make a flywheel spin fast enough to compete with millions of gallons of water pumped up a hill. Do not try to compete with the water using your giant spinning death wheel or big dumb crane. Batteries get a pass because they’re dense as fuck and very simple to deploy.

Yeah, every now and then I take a step back and say “what the fuck did they build?” when dealing with some of the GNU tools. Twenty minutes later I’ll start complaining about how the BSD version of something from coreutils lacks a GNU argument that would make my life about 83% easier.

It’s like a sick sort of Stockholm Syndrome. I do genuinely like GNU coreutils, but there’s some baffling shit present.

Hey there! I want to preface this by saying a couple of things. The first thing is that I don’t really have a horse in this race. What people run in their homelabs is their business, and I appreciate seeing diverse setups. The second thing is that we had a cordial conversation before about nuclear fusion. I’ve seen you around a lot, and I have a pretty high opinion of you. I’ve felt that if we interacted again, it’d be a mutually positive experience.

After reading this thread, I feel surprised and concerned. The tone of conversations in this thread seems different from what I’ve seen in the past when seeing the rainbow Starfleet badge. I hope I’m coming across genuinely when I ask—is everything okay? I’m not asking out of some oblique motivation to dismiss your point of view, but because I feel like there’s more anger and frustration in some responses than is (in my opinion, and only my opinion) warranted by the situation. Like, for example, have there been bitter arguments about this topic in the past? Is this topic similar to other ones that are frustrating/upsetting? Has today just been a really shitty day? The last one is pretty common for me, and I find that it can make me react with more anger and force than I would have otherwise intended. It doesn’t change my opinions or values, it just affects the way I express myself. I personally do not like to express anger on the internet (unless I feel that my anger is truly warranted), and I sometimes wish someone would stop and ask me “is everything okay?” in those moments. Being able to think about and express feelings about the thing that’s aggravating me is such a relief, and it helps me step back into myself. I’ve seen enough of your posts that I’m going to presume to extend that to you.

I want to reiterate that my intention here is not to dismiss or reduce your points, nor is it to change your mind. I’m not trying to tone police, because the tone people use on the internet is their own damn business. I’m totally accepting of a “please go away,” if all of this is off base or unwanted in any way. I’ve just grown fond of seeing your comments, and this thread seems like an outlier. If that’s intentional, then I apologize for my presumption.

For those who don’t know (including me):

Shotcut is a free, open source, cross-platform video editor.

I could see the NT kernel being okay in isolation, but the rest of Windows coming along for the ride puts the kibosh on that idea.

I’ll throw in “folks” as another gender neutral option. I say “you folks” all the time, especially in professional contexts. I’m not from the South, but I have family there so y’all is a part of my vocabulary. I use it in more informal situations pretty commonly.

Right, but I can’t require a second factor on a different device that operates outside of my primary device’s trust store. I’m sure there is some way to make my desktop hit my phone up directly and ask for fingerprint auth before unlocking the local keystore, but that still depends on the security of my device and my trust store. I don’t want the second factor to be totally locked to the device I’m running on. I want the server to say, “oh, cool, here’s this passkey. It looks good, but we also need a TOTP from you before you can log in,” or “loving the passkey, but I also need you to respond to the push notification we just sent to a different device and prove your identity biometrically over there.” I don’t want my second factor to be on the same device as my primary factor. I don’t know why a passkey (potentially protected by local biometric auth) + a separate server-required second factor (TOTP or push notification to a different device or something) isn’t an option.

EDIT: I could make it so a fingerprint would decrypt my SSH key rather than what I have now (i.e. a password). That would effectively be the same number of factors as you’re describing for a passkey, and it would not be good enough for my organization’s security model, nor would it be good enough for me.

I just don’t get why I can’t use something like TOTP from my phone or a key fob when logging in with a passkey from my desktop. Why does my second factor have to be an on-device biometrically protected keystore? The sites I’m thinking of currently support TOTP when using passwords, so why can’t they support the same thing when using passkeys? I don’t want to place all my trust in the security of my keystore. I like that I have to unlock my phone to get a TOTP. Someone would have to compromise my local keystore and my phone, which makes it a better second factor in my opinion.

EDIT: like, at work, I ssh to servers all over the damn place using an ssh key. I have to get to those servers through a jump box that requires me to unlock my phone and provide a biometric second factor before it will allow me through. That’s asymmetric cryptography + a second factor of authentication that’s still effective even if someone has compromised my machine and has direct access to my private key. That’s what I want from passkeys.

This is obviously wrong. The children yearn for the mines, not the slaughterhouse. They should be swinging a pickaxe at some pitchblende in an unventilated tunnel after school, not cutting up meat.

(/s obvs, I find the whole “the children yearn for the mines” thing to be just my kind of dark humor.)

This is a bad take. Several cities in my state banded together to create a municipal fiber network called UTOPIA. The fiber is owned by the cities that bought in and is used by several different ISPs. The ISPs pay UTOPIA for access, and then they have to compete with each other for subscribers based on performance, features, and cost. Like, there’s genuine market competition for internet! If the state owns the infrastructure and then forces the playing field to be level, then everyone benefits. People in the cities with UTOPIA got fast fiber internet waaay faster than anyone else, they have a plethora of choices (want a static IP and a business plan in your residence? There’s an ISP that sells that!) at great prices, ISPs get access to subscribers without having to maintain fiber, and the cities who bought in get to make money from this and attract residents and businesses who benefit from the service.

My city didn’t buy in. Google Fiber eventually came to town so I was able to kick Comcast out, but I am uneasy about what’ll happen if Google decides to drop their ISP business. If I was in a city with UTOPIA, it would just be one ISP folding and I’d be able to pick a new one and switch over right away.

EDIT: cool, Cory Doctorow wrote a blag post about it: https://doctorow.medium.com/https-pluralistic-net-2024-05-16-symmetrical-10gb-for-119-utopia-347e64869977
UTOPIA users have access to 18 different ISPs. I feel like that speaks for itself right there. This is the future we all should have had.

It already is. My company runs hundreds (possibly thousands) of ARM64-based instances right now. It’s done great things for our cloud spend. We still have more x86 stuff than ARM because some applications just don’t perform as well on ARM, but I can imagine that ratio will change as software gets more optimized (specifically the JDK, golang’s compiler, and GCC/LLVM) and Ampere releases new systems with better single thread perf.

EDIT: Ampere, not Alterra. God damn tech company names.

You can run Asahi Linux on M1 MacBooks right now. If you didn’t see the news, they’ve even been able to run some relatively modern AAA games with decent enough frame rates. Granted that’s only the M1 macs, but there’s at least one relatively modern ARM laptop that you can run Linux on.

I’ll totally concede that the new Snapdragon laptops aren’t running Linux yet. It seems like Qualcomm is taking Linux support seriously, but I’m a bit skeptical as someone who has been absolutely fucked by a shitty Qualcomm kernel module.

I just wish that companies enabling passkeys would still allow password+MFA. There are several sites that, when you enable passkeys, lock you out of MFA for devices that lack a biometric second factor of authentication. I’d love to use passkeys + biometrics otherwise, since I’ve often felt that the auth problem would be best solved with asymmetric cryptography.

EDIT: I meant to say “would still allow passkeys+MFA.” hooray for sleep deprivation lol.

https://sourceforge.net/p/flightgear/flightgear/ci/next/tree/

This random git repo I picked from their source forge page seems to have some pretty recent commits. I’m guessing they just have a slow release cycle.

That’s basically all I use from my Anduril flashlights. I don’t bother with the candle modes and all that shit. I’ve only ever used Anduril v2 flashlights, so maybe Anduril v1 was less intuitive?

I like the shutdown mode because the moonlight mode thing it does is great at night. Like, I use it if I need to find something in my nightstand and want to avoid waking up my partner.

EDIT: also, hello fellow flashlight nerd. I’m writing this with an Emisar D4K in my pocket.

lmao, kinda. There are a fair number of flashlights that are sold with Anduril though. I’ve personally never installed it/flashed it.

EDIT: if what I’ve described sounds like an acceptable solution, you should check out the Wurkkos I mentioned. I absolutely hate lights that put a strobe between me and the the mode I want, and I’ve been very happy with mine.

Flashlights that use the open source Anduril v2 interface are… tolerable, I’d say. It’s not good, it’s not intuitive, but it does at least make it easy to just turn the damn flashlight on and off.

1. Click once to turn it on, once to turn it off
   • While it’s on, hold the button down to change the brightness
2. Click twice quickly to put it in turbo mode, click twice quickly to take it out of turbo mode. One click turns the light off
3. Click twice and hold your second click to turn the light on in turbo mode. Once you let go of the button, the light turns off. I actually really like this mode
4. Strobe is three clicks, but it’s not the discotheque-ass crazy strobe, it’s usually an SOS pattern. One click turns it off
5. Click four times to lock the flashlight. This stops it from turning on in your pocket. This is a big deal for some flashlights because they’re bright/hot enough to burn you if left on in an enclosed space. Four clicks takes it out of lock mode

The interface gets way more complicated after that, but I don’t bother with any of that shit. Luckily, it’s hard to accidentally activate the crazy bullshit.

There are also lights that mimic this pattern, but differ in a few key ways. The Wurkkos FC11 is a great option that’s relatively cheap. The 4000 K version is $35 and is bright with a nice neutral color temperature (I find it much easier on the eyes.) It follows the interface rules I outlined above except that it’s missing number 3 and the strobe is of the flashy hold-a-rave variety. Still, you have to specifically press the button 3 times in a row pretty quickly to trigger it. I never have accidental raves with mine.

Playing it blind is absolutely like that. In retrospect, I’m surprised that I stuck with it. I usually struggle with hard games! The atmosphere and mechanics were enough to keep me playing tho. Totally understand though, it’s not everything for everyone.