skysight-inc/HackerNews huggingface dataset:
(ZeroTier founder here.)

Turning off compression: noted. We also might permit a no-encryption mode for trusted backplane networks for data center SDN use in the future.

There's no federation for the root servers yet. We have numerous ideas on how to implement this but it's not a current priority. It has to be done with care to avoid sacrificing speed, security, or ability to upgrade.

You can read some of the reasoning behind ZeroTier's design here:

http://adamierymenko.com/decentralization-i-want-to-believe/

TL;DR: we chose a design that delivers instant-on zero-configuration operation, security, and very fast (<5s) connection setup between any two devices on Earth at the expense of adding a small amount of centralization to the system. We also avoided certain technologies like DHTs because we wanted the endpoint software to be small enough to run on small embedded devices with limited bandwidth, CPU, and memory and on mobile phones with bandwidth and power limits. Our root server based architecture achieves all this.

The root servers are two-times redundant. There are two root servers and each of these is geo-distributed across six nodes. These are also spread across four cloud hosting ISPs. Any combination of up to 11 roots total can fail without the system being significantly impacted since each root individually has enough power to carry the whole net. All roots are secured with physical two-factor authentication and only permit ssh access from a set of secret gateway IPs (also secured with 2fa).

Root locations are: San Francisco, New York, Dallas, Toronto, Amsterdam, Paris, Franfurt, Johannesburg (SA), Sao Paolo (BR), Tokyo, Sydney, and Singapore. Almost everyone on Earth gets <100ms ping to at least one.
I like when he got to the hard part and then just stopped writing instead of doing some actual specification or design.
Beginner's Guide to Concurrent Programming  – Toptal
Fair enough, if you believe western propaganda the situation is already pretty dystopian. Does a room full of people providing mechanical energy in the face of shortages and being paid for it, more or less dystopian than a room full of people who are simply staring at the walls slowly starving to death?

Is that more or less dystopian than the folks I've seen in India breaking stones with a hammer into small piles of gravel?

I get that none of it is necessary in a world which is over flowing with wealth except that it is locked up by the .1%. Do you think Marx or Lenin bought into a communist state where there even was a 1%? As an engineer you work with what you have, not with what you imagine could be, in the hope that you can move the situation forward into something that would be more to your general liking.

So yes, it would suck rocks if the only work you could find in a city was providing motive force for elevators when the power was out. The only thing that would suck worse than that would be that you could find no work at all in a city and were considering a life of crime to avoid starving.
I've sent my brother (non-programmer) many code snippets and google results to help him learn python. They don't help because the problems he's trying to solve are about 8 levels of programming knowledge above what his current knowledge level is (trying to understand a for loop). Conversely he asked me to automate some java application workflow for him and even though I haven't done swing in 8 years it was trivial for me to do. It might have taken him months even with googling.
The author's objection in this case is that this was just another question on a worksheet that was graded right or wrong then the class moved on to other things without further analysis or explanation. Not that the problem was impossible.

If the lesson of an "impossible problem" was a deliberate assignment set with an educational intent then there should have been a follow-up or even a primer beforehand so that the "poor kids" are not left thinking that mathematics is just randomly weird and absurd.
Just the logo?
There was a nice SF novel by Clifford D. Simak where all the humans eventually migrated to Jupiter, to cavort pleasantly amongst the clouds, and the world was literally left to the dogs.

All we need is the migration to Jupiter.
Nice, thanks for this!
While probably better than relying on mobile towers, aren't satellite communications difficult with a dense forest canopy? Probably best that people be aware of the limits of their devices before heading out.
Awesome, thanks very much.
I've only ridden in Priuses. They are popular with Parisian taxi drivers. Creeping along at 15-30kph in rush hour traffic the engines rarely came on. It might be different for other hybrids but the Priuses of that vintage (I know the tech gets better each year) can definitely move, for short distances, on battery alone.

Definitely agree that hybrids should have some sort of baseline of electric locomotion.
Useful if you don't want to expose ports, use always the same IP address even when moving, etc
There is also paping [1] that lets you "ping" to arbitrary port, although it only works for TCP.

[1] https://code.google.com/archive/p/paping/
To be clear, I was not referring to references at all but rather to naked pointers you get by calling get() on a unique_ptr, and passing those to non-owning classes/functions that need them (including third-party APIs).
Phishers aren't really targeting those people who ensure they've always got an adblocker installed on the machine they're using and always pay enough attention to distinguish between ads and the top organic result though.

I'm not convinced Google wants to use the "we can't possibly be expected to vet everyone buying our ad inventory; if you don't want our search engine to highlight scam pages you can always block our ads altogether" defence either...
The way I understand it is that on first invocation of a function exported in the library this function will spin up a regular PyPy interpreter, which does JIT in exactly the same way as a normal invocation of PyPy would.
What makes Iridium's network less proprietary than Spot's network?
Interactive C++ in a REPL [Public Beta]
The concerns I've got over EVs:

1. They're fundamentally a materials properties based technology. That is, you're dependent on storage substrates (especially lithium), conductors (especially copper), lightweight body materials (especially aluminium), and various specialty components within parts for the specific set of features of an EV. It turns out that lithium, copper, and aluminium are all at least somewhat constrained in overall availablity, some highly.

A conventional oil-fueled car works pretty well with iron (exceptionally abundant), with carbon added for steel (actually something of a concern: 15% of global coal consumption is for coking fuel), and a few stray odd bits. Overall, an oil-fired ICE auto is far less dependent on specific material properties of scarce material resources than an EV.

2. Batteries simply don't have the energy densities of liquid fuels. Tesla's success has, frankly, stunned and amazed me, though much of it seems to come from exceptionally good energy management. There are uses to which that's all but certainly not sufficient. Heavy overland freight trucking, marine transport, and air travel -- a future with these in abundance will not run on batteries.

There are some other options. Trucking using catenary cables or (literally) road trains, with battery capacity for a few kilometers of off-grid distribution, could work. Trains can be electrified, though doing so for the US rail network poses high challenges. Ships were once powered by the wind, and may well be in future. High-capacity, high-speed air travel is pretty much impossible without liquid fuels though. The alternatives are either a) hugely expensive or b) much smaller and/or slower.

One option for air might be higher-speed zeppelins, possibly utilising solar power.

The 1930s German zeppelins had peak speeds of about 80 mph, cruising of around 70 mph. That made for about a 30 hour Atlantic ocean crossing. Designs in the works suggest about a 140 mph top speed might be possible. An ultra-light, high-efficiency solar cell over the upper fabric of such an airship might supply much the needed motive power, and lift would be obviated through a lighter-than-air gas (probably helium).

Airships have other problems -- they're fragile, have a limited service ceiling (the Graf Zeppelin cleared a mountain range in the USSR by only 150 feet, close to its 6,000 foot ceiling), and would be dangerous near storms or other disturbances. Landing in high winds is difficult. But they're at least an option.
Lower-priced but "lower-quality" is one of the quintessential properties of a disruptive technology. You can probably apply this to all electronics manufacturing, from smart phones to consumer drones. Could smart phones have become so ubiquitous if each cost over $1000 to buy?
A DAO is a Decentralized Autonomous Organization. Participating in the governance of a DAO can happen from anywhere that can read/write to the blockchain, and the rules are autonomously enforced across all participants because they are encoded in the blockchain.

The DAO is a DAO specifically designed to raise money for other DAOs. The unique thing about it over other crowdfunding platforms is that voting rights are implemented in an Ethereum contract hence enforceable with no central authority.
>Therefore, Eisenmann is responsible and Tesla should not be held accountable.

Why not? Otherwise, follow the logic: sub-contractor after sub-contractor until you reach the bottom and you've got some fly-by-night operation that you can't hold accountable.

Everyone involved shares the blame, including Tesla
That's really weird.
Whose products? I don't see how your comment follows. Are you talking about $90k automobiles or groceries?

GP was commenting on the expense of hiring American workers and wage competition. While there are some moral arguments for higher labor cost such as (ironically) workplace safety, the necessity for laborers to be able to afford the products they make is just nonsense.
The OP asked for examples of lisp being used anywhere that is relevant, and I gave some.
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Hi, I just did a short test and it looks really promising. It has also an android app! This is really the selling point for me :)

BUT I really do not believe that this is the way a rpm package should look like. I know that it is not easy, especially for smaller companies, to provide packages for all the platforms. In this state, it would be much better to just provide .tar.gz archive. Its just my opinion ;)
You can tunnel inside almost any protocol. That's not a great reason. Valid, sure; good, no.
Yeah, it seems like any animal rights legislation that ignores the meat industry is solving the wrong problem.
I'm aware it is not unusual. It is not unusual for software to be badly
written, too (being wide-spread is no sign of being a proper way of doing
things).

For a single project (and OP said it was one project) depending on that many
specific tools coming from that many fields is a strong sign that the project
does too much. Most of the tools mentioned by OP are from the set to be
decided in deployment time instead of design time (log transport, storage, and
browser, deployment automation, stuff like that), and they should not be
dependencies.
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Given the other stories this article brings up, it seems Eisenmann has a history of this kind of thing.
(ZeroTier founder here.)

iOS app is shipping next week. Approved by Apple, just waiting on a DUNS number (sigh).
The CAP theorem is fundamentally about distributed systems. The name is on the tin. It's not ignoring things, you're trying to pick an argument via examples outside the explicitly defined scope.
Love the concept but hate the fact that the recommended install process on Linux is the dreaded wget | bash.
I listen to my flash briefing (news podcasts/summaries) every morning, and occasionally reorder bulk items like paper towels and toilet paper.
They call you an impoverished country because Slavic language = Eastern Europe = poor hungry alcoholic Russians. Welcome to the US media :-P
The Experts Have Spoken
(ZeroTier founder here.)

We're working on better RPMs and DEBs and on getting into Debian itself and hopefully EPEL/Fedora. Right now the packages are minimal and not entirely correct (though they do work).
Google uses CTR to rank the quality of ads. You might be helping them actually.
pentadactyl add-on for firefox. Allows you to browse like you were using vim and allows you to script anything you do on the web.
Vimperator isn't nearly as powerful and all the chrome options aren't even worth mentioning.
Re #2: As someone who more or less lives in the Linux command line. I concur with this. Once you know regexes well you can find productive time-saving uses for them dozens of times a day. I rarely go a couple of days without using a regex, never mind a couple of times of year.
I think it dates back to 2008-ish[0]. NYT's also been adding archives and features[1]. The latter gives an overview of their approach to the technical challenges of serving up MB's of data from scans. Tl;dr, NYT tiled the scans into "digital maps."

[0] http://scobleizer.com/new-york-times-announces-times-machine...

[1] http://open.blogs.nytimes.com/2016/02/01/how-to-build-a-time...
Yes, in the US, you will almost never see a 13th floor.
What about rights for ladybugs?
Model 3 will go for about $30,000?

Yes, I wouldn't expect workers at Ferrari to be able to afford one but this is the outlier.
i'd agree with the teacher that this is the most 'mathy' way of getting a kid to do a multi problem worksheet

i think it would have been kinder to to do 123 and 900 while also offering the possibility of choosing that it is impossible to achieve

i also disagree with the op's tactic of 'proving' this

this attempt to do less work to show the impossibility of the problem furthers the math education fallacy that numbers are material stead an abstraction

his method would falter in any other base

in research this reasoning is great at limiting a problem's scope but is useless as evidence in a proof, for instance: primes must end in 1,3,7, or 9, but to say any number ending in those digits is prime is clearly false..also 2,5 :p

i like the question the teacher offered but i think it is more appropriate in the math education i have been touting as the necessary future: teach the student to write a program that builds every possible iteration, adds them, then sorts the sums, then search for your desired value

learning math and programming together

it's long time to free our thoughts from rote arithmetic so we can think about larger implications and further abstractions more readily

i find it difficult to accept that the teacher truly just moved on without discussing this problem, that reads more as an excuse to write this post, but if it is true that is a ridiculous failure on the part of the teacher

also, offer kids real open questions stead some trick question, when i was in school i used to say to my math teachers 'why should i do these problems? you already know the answers' they treated me like a jerk, now that mindset is how i direct my research
> I suspect we will see more of this craft production of nice things at costs a large multiple of the cheapest mass-produced items.

A nice thought. Experience tells me it will remain remarkably difficult to find skilled craftspeople.

Businesses such as this, although frequently making things I want to buy, seem exceptionally vulnerable to recessions, so there's regular attrition.

Even now will often have little idea of this new-fangled internet thing - presumably too busy at the lathe or forge!

I wish there were easier ways of finding these folks. Google is no help most of the time.
No separate pieces. You can kind of hack it so that single actions are set up as an activity, i.e. one activity is turn it on, a separate activity is turn it on then hit volume up 5 times, separate one for volume down, separate one for play/pause, etc. In harmony's settings for the tv you have to set it not to manage the off state so it won't turn off the tv when you switch to volume up.

It could be so much simpler, they really overcomplicated it
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No, this is like people telling others to weigh themselves only once a week - because they know that members of the general population can't be bothered to understand "mathy" concepts like running average, or (gasp!) low-pass filter. It's recommended because otherwise a lot of people end out freaking out over noise in the data. And this is exactly the topic here - laymen freaking out over data they're not equipped intellectually and emotionally to comprehend.

Now the other point - that moar data is always better; in principle, yes, if you follow rigorous rules about collecting, analyzing and integrating it into the existing body of evidence. Which is not what usually happens outside research conditions. As you said,

> [the solution is] to collect the data frequently and rigorously, and the post process it into a trend.

The thing is - we've having big problems with the "rigorously" part, as well as no-bullshit post-processing. The current wave of companies selling "health" sensors ain't helping - they push on frequent collection in a totally non-rigorous way, using half-assed measuring equipment. And giving that data to normal people first (besides taking it and monetizing it), many of whom will obviously be freaking out. This is not helping to form "coherent picture of the reality" much. It's just helping those companies line their pockets.
So, those scammers might be stupid to pay for something that won't work, right?

It is a top result by definition. Google, You and I know not everyone is aware of the implications of a paid ad (e.g. not so relevant for your search). I personally consider it a dark pattern to put ads there, but I guess they know better than me how to build an empire.
I'm a pretty lib guy, but let's be honest, could we have the iphone/macbook without apple? ibm? intel? Not everything can be done "fast", although I grant many things can't be done slow, and as recent years have shown, more and more can be done by those "fast moving" companies also.

I think the question of whether big business should exist is at this point no longer really an open question. Instead, it is important for us to regulate them. Dissolving the concept of a big business is throwing out the baby with the bath water. I feel like even big businesses as institutions can provide some good in society that smaller organizations not always can.
There have been events where power is lost for extended periods in developed areas. Hurricane Katrina would be a good example of people being trapped without basic services inside a major metro. Tornadoes, flooding, wildfires, and ice storms are other examples. A smartphone would last 1 - 2 days before going offline. Less if you used it actively. It might also get stolen.
Ask HN: Is it smart to fundraise on the heels of major press coverage?
My startup was recently featured in The Atlantic, and we'll be on NPR next week. This is the first major press we've gotten since launch, and it's driving lots of new end users and corporate partners.

We have been considering raising a round and would do so if it wouldn't be too large of a time-sink. From reading others' fundraising stories, it seems like the hardest thing is getting the first commitment and turning investors' mindsets from wait-and-see to FOMO. Is major press coverage an effective catalyst in this regard?

I realize the answer is likely different at different stages—obviously no one ever started a B round because a newspaper wrote about them. We have seed funding from Intel Capital and would be looking to raise around $500k.
The energy efficiency of the process is bad, but the future economic conditions could change dramatically:

1) Fossil fuels costs will eventually start rising and never come down again. How much investment and attention will synthetic production receive when oil is $100/barrel? Or at $200/barrel, or $300/barrel? More investment could lead to significant process improvements.

2) Solar energy has improved tremendously and continues to improve more. But the great weakness of solar is that it's only effective at daytime. Anything produced in excess of daytime demand is basically waste energy. Since it's waste energy, the inefficiency of the oil synthesis process doesn't matter. The only competitor here is other energy storage methods such as batteries. The key question here will be, is it better to store this excess waste energy in batteries or use the synthetic process to make oil? From a pure efficiency standpoint, battery is better. But when considering the existing oil infrastructure, the answer is not as clear.
Each one is unique, because they are always being improved.
If you're afraid of Oracle suing Debian for doing less than Oracle themselves do for profit (with linux+dtrace), you could get the distribution from zfsonlinux.org. Then the risk is transferred to .gov, who are also significant end users for enormous high-performance parallel filesystems. They have also been distributing binaries for RHEL-ish kernels for a while.
> Why does that sound like a badly written thing, you having no knowledge of the specific domain he's referencing?

I don't have the knowledge, that's why I didn't claim the system was badly
written, I only expressed my impression it was. I know, it's a subtle
difference easy to be overlooked, especially if somebody is invested in
similar architecture.

And it still sounds like a bad idea to tie oneself to specific log transport
and log storage, and to a single load balancer at a project time. Use of
MongoDB when already using PostgreSQL (or vice versa) doesn't add much
soundness, either.
Perhaps Judge Koh is too familiar with the rarefied world of 1% techies to understand how burdensome filing fees are for college students.
This still uses the mobile network.
You've got that backwards.

There's all sorts of things that make absolutely no sense for business owners to do, so we have labor laws because business owners can't be trusted to not fuck everything up for society.
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Also writing good code (easy to maintain, few bugs, easy to extend) is a craft not something you do spontaneously when you need to fix a problem. It takes time to develop and get a good sense for it. This is the key thing I see with all these bootcamp grads - they know the terms and they know how to throw crud apps together but they struggle to write clean code that adheres to SOLID that isn't littered with antipatterns.
Yes, zfs in contrib appears inconsistent with openafs in main. Has that been explained somewhere?
Interestingly, they included the full text of the Supreme Court decision in the article. I guess they could just link to the PDF these days, but would the New York Times have included the full text in the early 90's?

Edit: Also of note is the notice of the first "aero-taxi" beginning service in Paris.

Edit 2: And reading the article, we see that concern over "activist judges legislating from the bench" is nothing new.
Totally. I've been programming for twenty years now. The way I learn a new language/framework/API is by Googling for examples. I've found it to be the fastest way to pick up something new, to the point where I stop reading the official documentation if it isn't heavy on code samples and go search for something someone else has written that is.

You can pick up so much about a new tool so quickly simply by applying an existing broad knowledge base of programming information to a few examples.
I think perhaps I would be more comfortable with a Star Wars droid style name like 'AZ', tbh
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Install Script: wget http://www.loopperfect.com/downloads/jyt/debian/latest/insta...
It ensures all dependencies are installed

Debian package:
http://www.loopperfect.com/downloads/jyt/debian/latest