Yeah it's a total hog of attention. At the company I just left, you could walk through our office and 90% of people were just talking on Slack. What a waste of engineering time.
We were pretty invested in ChatOps which I thought was great. Being able to issue commands in any sort of war room situation with a group of people was definitely helpful for that sort of triaging. Of course, the downside being that depending on Slack to be up to do effective operations isn't super appealing to me.
Of course people have been doing this with IRC forever, but Slack is a definite improvement on this front over Skype.
Why an "atom" for "adm"? Get ready for another "kube-cuddle" vs "kube-ctl" debate to break out.
This is incredibly confusing to the countries who don't suffer from the /t/ vs /d/ sound (which is described here: https://en.wikipedia.org/wiki/Flapping).
Posting this here hoping that someone with more knowledge can enlighten me about this. After going down a bit of the rabbit hole, I see that the SR-71's first flight was in 1964. It has held the record for fastest air-breathing manned aircraft[0] since 1976. What is the reason that given all of the technological advances that record hasn't been broken?
No one has answered why; only answers have been "no marketable product".
There are several technical reasons why, none of which have been been subject to any technological advances in half a century.
1) There's a buffer factor where burning fuel adds a thousand degrees (or whatever) to temp of the air in the engine and steel / titanium / classified will melt several hundreds of degrees above that. Most all jet engines can only work with subsonic airflow. Supersonic aircraft use exotic inlet designs that are inefficient but can convert fast air into very hot compressed air. Somewhere around mach 2 to mach 4 the inlet air temp plus the heat of burning fuel will melt any metal turbine blade. You can pay a lot of money to get a couple mach numbers but fundamentally cheap steel gets you mach 2 and price is no object aerospace material tops out in the mid mach 3 range. True lab experimental materials might survive mach 4 temps, maybe. You just can't get a usable thrust to weight ratio inlet design that works above mach 4 or so.
2) Second aerodynamic problem is if you define "fly" as a lift to drag ratio better than a lawn dart, optimizing wing sweep etc for mach 3+ means its a truly awful performer below 5000 feet or so. Its hard to make an aircraft that actually "flies" above mach 4. Space shuttle L/D ratio was around or below 1:1. Essentially things flying thru the air above mach 4 don't fly in the sense of wings producing lift, they're ballistic trajectory like a missile or bullet, don't bother slapping wings on them.
None of the above can be solved with faster computer cycles. Titanium still melts at the same temp, etc.
There are relatively simple ramjets that fly at around Mach 4 speeds. They are unmanned and are accelerated to speed by solid rockets. Probably the ramjet can't even start below Mach 1 or so.
Designing an air breathing propulsion system for a wide speed range is difficult.
Rockets are much easier after a certain point. McDonnell Douglas and Paul Czysz had interesting projects. If you want manned reconnaissance, a Mach 6 air launched liquid rocket powered lifting body would probably be the next logical step from the Blackbird and would not even be super hard. With rockets you don't have the inlet problem at all and they have excellent thrust to weight ratio.
Basically, satellites took over They are cheaper to operate and less vulnerable to defensive countermeasures and other failure conditions. From a Los Angeles Times article from '89 [0]:
> "The Air Force decision to retire the Blackbirds in 1990 is based on several factors. In congressional testimony, Air Force Chief of Staff Gen. Larry D. Welch identified the increased survivability of reconnaissance satellites, SR-71 vulnerability to the Soviet SAM-5 surface-to-air missile and the cost of maintaining the SR-71 fleet."
They took over, but there’s still an argument for spy planes; satellites arrive on their own schedule in predictable orbits. This makes it very hard to get timely photographs, and it makes them easier to defend against. A spy plane could get in and out of a trouble spot within an hour, all before the enemy can hide the nukes or whatever.
A modern spy plane however would have to be faster than the SR-71, which I don’t believe would be safe against modern SAMs.
Based on the totally amateur knowledge level of someone that once spent a few hours researching stealth satellites (MISTY, etc), there's obviously a demand within the NRO for satellites that can be launched into a known orbit, with published two line elements, and then go stealthy and change their orbit into something which cannot be predicted by enemy nation-state ground forces.
I don't believe anything worthwhile about current capabilities has been declassified, it's all conjecture by people looking at the X-37 and similar systems.
There are faster air-breathing aircraft (e.g. [0]), but none of them are manned because with modern technology there's no need to put a person in them, and the people funding these developments aren't interested in spending lots of money just to chase records.
There's also the outside possibility that faster manned aircraft exist, but remain classified [1].
There's just never been a need. The SR-71 could already outfly missiles.
And in general, now that we have the technology, the SR-71's role is much better filled by unmanned craft like satellites anyway.
Stuffing a man inside one of these deathtraps and getting him home safely adds orders of magnitudes of difficulty. A better question might be, why would you want to send a person up in something like this, if you could possibly avoid it? It would most definitely be awesome, but it would come at the cost of billions of dollars and possibly human lives.
Also physics is a real bastard. Air resistance increases with the square of velocity. Even small gains over the SR-71's speed would come at a very, very high cost in terms of fuel burn rate, etc.
-Wholly uneducated guess: many of the tasks handled by the SR-71 is adequately handled by satellites today.
Additionally, if someone had indeed broken the record in some black project or the other, chances are they would keep mum about it rather than calling Guinness Book of Records.
I want to go out on a limb and say two things: (i) It probably is broken. (ii) That table doesn't show when the data was listed as public. The reference on the top speed is "Taylor 1988, p. [51]."
> These interposing network elements, called middleboxes, often unwittingly disallow changes to TCP headers and behavior, even if the server and the client are both willing.
There is nothing worse than finding out that someone not even at the company anymore decided years before to deploy some crap like this. Drives me absolutely crazy to impose stuff like this where silos in companies means transitioning involves on the order of 4-5 different "components" need to change.
Oh, modern networks are basically just a single huge middlebox with servers on one side and intra|internet on the other side.
There isn't much opportunity for people to plug random stuff between your server and the middlebox (the main middlebox would disallow it, like anything else), but there is still plenty of crappy rules everywhere and nobody knows why they exist or what they are. And you can't even call your ex-coworker and ask for help, because it's an ex-employee of the middlebox company, not yours.
Radio Yerevan was asked: "Is it correct that Grigori Grigorievich Grigoriev won a luxury car at the All-Union Championship in Moscow?"
Radio Yerevan answered: "In principle, yes. But first of all it was not Grigori Grigorievich Grigoriev, but Vassili Vassilievich Vassiliev; second, it was not at the All-Union Championship in Moscow, but at a Collective Farm Sports Festival in Smolensk; third, it was not a car, but a bicycle; and fourth he didn't win it, but rather it was stolen from him."
The Manhattan & Martini both derive lineage from the Old Fashioned. The Old Fashioned was so named in the late 19th century as it was trying to recreate the original cocktail, as in "Don't give me one of those drinks with all the stuff in it, give me an old fashioned cocktail".
The Martini derives from the Martinez which is a much sweeter drink. Heavy on sweet vermouth and using a heavier & sweeter style of gin. It should be clear at that point that the Martinez and Manhattan aren't super far apart.
This is anecdotal, but I used to work at a large (Fortune 500) financial company. The CEO had no engineering experience, but every year they would do an annual summit of the goals of the company. Over 50% of the talk every year, they would drill down pretty deep into technical topics, I was always amazed that at that level he actually knew enough to be able to describe complex data engineering topics and machine learning models. Even if it was rehearsed, I always came off the talks super impressed with their ability to talk at that detail.
Also, Bezos was a Computer Science major and a developer for 4 years after graduation.
Another point I recently heard, and I can't recall the exact quote off my head but it was along the lines of: "Amazon at this point is really just a cloud company that is using it's cloud earnings to subsidize its other business arms to grow to a big enough scale where it can choke out all other competitors."
The author states that the talk was inspired by this series of blog posts[1] if you are like me and find articles about technical topics much easier to consume than talks.
I still have that on iOS? Never noticed it going away and it’s still there for me. That feature really did take way too long for me to realize although.
Docker has a multitude of benefits for single machine multitenant deployment strategy, namely resource and file system isolation.
It also has the benefit of being self documenting of dependencies via layers, which is a nice thing to have. To be honest, running just about anything self-hosted can be deemed overkill when there are so many free hosted solutions. But that’s why we’re engineers because sometimes it just scratches an itch for us :)
We were pretty invested in ChatOps which I thought was great. Being able to issue commands in any sort of war room situation with a group of people was definitely helpful for that sort of triaging. Of course, the downside being that depending on Slack to be up to do effective operations isn't super appealing to me.
Of course people have been doing this with IRC forever, but Slack is a definite improvement on this front over Skype.