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Comment: Re: Strange (Score 1) 80

by bbn (#49177425) Attached to: Linux and Multiple Internet Uplinks: a New Tool

Linux has been able do multipath routing for a long time: it means being able to have routes with multiple gateways and to use them in a (weighted) round-robin fashion. But Linux is missing a tool to actively monitor the state of internet uplinks and change the routing accordingly

No the author is lacking knowledge of such tools. There are at least three major implementations of common routing protocols for Linux.

It is actually surprisingly simple. You activate OSPF on your Linux box and it will add routes on working links and remove them again if the path is no longer viable. Works both ways too, so your routers will not try to deliver traffic to your box on a dead link. Instead the routers will route around the problem.

Comment: Re:(some) cars are gadgets now (Score 1) 158

The car clearly lacks enough sensors to become truly self driving. How is it going to avoid changing lane in front of a faster moving car, when it has no rear facing sensor with longer range than 12 ft? How is it going to tell the difference between a pole and a child on a bicycle before doing a right turn, when it only has simple sonar sensors in that direction?

They could at the very least have added more cameras. Cameras are cheap. Why not let the computer have 360 degree view of what is happening around the car?

But it might also be that there is no way around using LIDAR. It is expensive like hell, but that might change when you need millions of devices a year.

In any case, the new Tesla does not have the hardware necessary to implement the vision of a self driving car. They know it, so that is why they call it "auto pilot" instead. It is just sad that it is nothing new. Every other car in that segment already has this "auto pilot" under different names.

Comment: Re: Failsafe? (Score 3, Interesting) 468

The worse thing that could happen to a view screen is that it gets so smashed up you can't resolve fine details through all the cracks (actually, the absolutely worse thing that could happen is that it ceases to exist, but at that point you've got other problems). But the fine details are hardly necessary for flying and landing.

Not so, This 747 went through a ash cloud from a vulcano and got their windscreen sandblasted: http://en.wikipedia.org/wiki/B...

As Flight 9 approached Jakarta, the crew found it difficult to see anything through the windscreen, and made the approach almost entirely on instruments, despite reports of good visibility. The crew decided to fly the Instrument Landing System (ILS); however, the vertical guidance system was inoperative, so they were forced to fly with only the lateral guidance as the first officer monitored the airport's Distance Measuring Equipment (DME). He then called out how high they should be at each DME step along the final approach to the runway, creating a virtual glide slope for them to follow. It was, in Moody's words, "a bit like negotiating one's way up a badger's arse."[1] Although the runway lights could be made out through a small strip of the windscreen, the landing lights on the aircraft seemed to be inoperable. After landing, the flight crew found it impossible to taxi, due to glare from apron floodlights which made the already sandblasted windscreen opaque.

As you see, they didn't eject. They landed the plane flying blind.

Comment: Re: i dont see a problem here (Score 3, Interesting) 146

by bbn (#47387953) Attached to: NASA Approves Production of Most Powerful Rocket Ever

SpaceX already has Falcon 9 Heavy which will do most of what NASA wants to do with SLS. In addition SpaceX is developing the Mars Colonial Transporter http://en.wikipedia.org/wiki/M... which will put 100 tons of cargo on Mars. In comparison the SLS will only put 100 tons in low earth orbit.

Oh and the Mars Colonial Transporter will be reusable.

Comment: Re:Do we need HTML+Javascript at all? (Score 2) 104

by bbn (#47387317) Attached to: Famo.us: Do We Really Need Another JavaScript Framework?

You like C#, I like Scala and the next guy over likes Haskell. Trying to force everyone to use one language that fits all is one of the big fails of JavaScript.

Language development is an ongoing research area. You can not just freeze time and say we will use this one for the rest of time.

This is why we now have a host of languages that compiles to JavaScript. I use Scala-JS that will convert my Scala to JavaScript. But this is horrible inefficient and limiting.

The correct solution is PNaCl: http://en.wikipedia.org/wiki/G...

Portable Native Client is a LLVM based byte code language, that is designed to be a target for other programming languages. You can compile your beloved C# to PNaCl, someone can compile his C++ and I can compile my Scala. And it is almost as fast as if you used machine code as target.

Comment: Re:Where is IPv7? (Score 1) 250

in gp example it would be: :::::: or ::::::1:2:3:4 or perhaps netname::
there's tons of better ways then having to memorize 8 groupings of 4 letters.

The last one is already legal syntax:

baldur@ballerup1:~$ ping6 -c3 2a03:7900:64::
PING 2a03:7900:64:: 56 data bytes
64 bytes from 2a03:7900:64::808:808: icmp_seq=1 ttl=43 time=28.7 ms
64 bytes from 2a03:7900:64::808:808: icmp_seq=2 ttl=43 time=29.0 ms
64 bytes from 2a03:7900:64::808:808: icmp_seq=3 ttl=43 time=29.7 ms

--- 2a03:7900:64:: ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 28.737/29.158/29.730/0.419 ms

Comment: Re:IP numbers are terrible (Score 1) 250

Nothing stops you from assigning fe80::1 to your printer #1 and so forth. Or you can use ULA to the same effect: fd00::1 to the first printer etc.

Or do it the sane way and use your prefix::1.

You do not have to use MAC based addresses you know. You can just assign the addresses manually (static) or you can use a DHCPv6 server.

You can be replaced by this computer.