Because you don't need to enable every feature that an OS has?
If you want to play around with something experimental, temporarily load it as a module, or use Rump or Puffs to isolate the filesystem code to a userland process and hack away.
This sounds like exactly what you'd need if you wanted to do something like accept card payments using your phone, similar to the iPhone credit card adapter. Same tech, different color hat.
I once dropped an old motorola flip phone off a 50 foot cliff, had it split apart into half a dozen different pieces, snapped it back together and it was fine. Somehow I doubt the G1 I have now would survive as well.
Acceleration from a car crash, even a minor one, can easily be _several_ g! It's not really comparable, unless the earthquake makes your rack fall over and hit the ground.
Re:Where do these guys get money from?
on
Flying Humans
·
· Score: 1
To get to the point of flying wing suits, especially at the level as the people you see in various videos: no it's not cheap. However, it takes years to get to that point. Just like you can't hop on a motorcycle for the first time in your life and expect to win the Grand Prix, you can't jump right into being an expert skydiver. On the other hand, just getting into the sport of skydiving is about as expensive as getting a motorcycle (Actually, less expensive, if you're comparing it to a fancy GoldWing or Harley) and IMO a hell of a lot more fun.
Most people that fly the suits do so well away from obstacles denser than a cloud. With the forward speed you get, it's actually possible to fly around cloud formations. Of course, if you screw up in that situation and get too close, it's not that big of a deal. Still, if you're tracing the vertical lines more than the horizontals, you're doing something wrong.
Re:Been around for 10 years
on
Flying Humans
·
· Score: 1
You don't even need a D license at some places. Having more experience won't hurt, but most people recommending around 200 jumps minimum (C license). Actually all it takes is convincing someone who has a suit to let you borrow it. (of course, if they have enough jumps to actually own a suit, they'll probably make sure you've got the skills to fly it before handing it over:) )
They're also a ton of fun to fly. If you've ever considered getting into the sport (or making a few more jumps if you're already a skydiver), and needed another reason for it, flying a wingsuit is a good one.
uh, no. Sorry, but you're not going to rip your arms and legs off, and suits are definitely not "just shy of the maximum size the human body can stand". The limiting factor is how long your arms and legs are, and how far apart you can spread them. Anyway, even if you were approaching limb wrenching sizes there's a simple solution: bring your arms and legs in. That's what you have to do now when exiting (at least if you want to avoid the tail of the plane), and when opening your chute so you gain enough speed for it to inflate properly.
Also, you don't need any fancy materials, or "electric charge" to make a rigid suit. They already _are_ rigid, using the same method that parachutes use: airspeed to inflate the cells. Some of them even have airlocks to keep them inflated even if you slow down.
Which is a pretty good deal, if you compare how much it costs to do an actual jump out of a plane. Even for experienced skydivers, it is a very cost effective way of getting "air time" (and at twice the interval of a "normal" 60 second skydive)
However, it's mostly useless for flying a wingsuit. The problem is that wearing a wingsuit will convert your downward motion into horizontal motion. Besides the increased time in the air, it's fun to be more flying around rather than falling, but try that in a tunnel with a width of about 14 ft and you won't be very happy.
A fair number of those are bugs for other OSes, due to having pkgsrc issues included in the same bug database. pkgsrc runs on a dozen different platforms so the bug database ends up with a lot of issues not directly relevant to NetBSD. Right now, there are 1233 open bugs relating to pkgsrc, many of which are non-NetBSD issues.
As for the classification of other bugs, you can check out http://www.netbsd.org/Gnats/ for a table of how those are distributed. Quite a few are specific to just a single port.
It's better than RAID in that if your entire main server gets toasted (e.g. literally, your house burns down, or similar), you've still got a backup.
From what I gathered in the article, it isn't similar to a database's logs because it just mirrors the writes, without saving the old disk image. Although it sounds like it would be fairly easy to just save the packet stream and have the ability to replay your disk image to any particular moment in the past. That would be much better than RAID. After all, backups aren't just to protect against drives failing; they're also to protect against accidental "rm -rf"'s in the wrong place.
As for setting up a new backup server, if it's just a app listening on the backup server, it shouldn't be any more difficult than installing any other application.
You're not understanding how Xen works. Xen doesn't let you run one OS inside another, they run side by side, almost as if they were two processes.
Running OSes inside of Xen and running MS Windows inside of Linux are two completely different things. If you can run MS Windows inside of Linux, whether or not that Linux kernel is running inside of Xen probably won't matter, since for that to work at all you probably have to trap any protected instructions and emulate them. Whether the emulation is implemented using actual ring 0 instructions or Xen hypervisor calls should be irrelevant.
However, you _can_ run Windows inside Xen, and people have done so. It's difficult to do because you need to manage to get a Windows source license and build your own copy with the necessary modifications, but not impossible.
<script> function make_onclick(old_oo) { var old_onclick = old_oo; return function () { // Do evil click tracking here. if (old_onclick) return old_onclick() } }
var x = document.getElementsByTagName('a'); for (var i=0;i<x.length;i++) { x[i].onclick = make_onclick(x[i].onclick ? x[i].onclick : null); }
</script>
Put that at the end of any web page and you should be able to run whatever you want on any link click.
It's 1.5 billion gallons of oil, not gas. Oil is currently running around $60 a barrel. 1 barrel is 42 gallons. Assume each windmill will cost $3mil, and 30 will be installed:
$3mil * 30
= 42 years.
$60 / 42 * 1.5mil/year
So it's going to be a while before it pays off, at least if you just take into acocunt the money part of it, and not the environmental aspects.
eh, it's ok. (I've seen it, since I'm a NetBSD developer). The thing to remember is that we were not looking for a mascot so it isn't the same anthropomorphic style as other groups. (i.e. the linux penguin, or the openbsd blowfish)
So this seems like one of those things that would be blindly obvious to anyone "versed in the art". Why doesn't stuff like this get caught _BEFORE_ the patent is issued? Isn't there a comment period before the patent is actually issued? Is there an easy way to get access to those pending patent descriptions? I would imagine that the slashdot crowd hearing about this in its pending state and having several people respond to the USPTO would have a sanitizing effect.
I tried the test program on an Athlon/850 with PC100 ram, running NetBSD. The measurment with the gettimeofday() calls was around 6 usec/call. Replacing the gettimeofday() call with a getpid() call resulted in a time of < 0.35 usec/call. The main reason for this is because the gettimeofday call (under *BSD at least) needs to copy the resulting time out to the user buffer. I get a similar drop in call time if I replace the arguments to gettimeofday with NULL (causing the syscall to do almost
nothing).
Of course, since the purpose of the
time-timers.cpp program is to time the timing
routine, we want to time the actual overhead, including the user/kernel space copy (and the overhead of the function call),
I'm not sure why Linux is so much faster on the gettimeofday() call. I'm guessing it perhaps can retrieve the time directly into the final buffer? Or perhaps it has a more efficient way to copyout the data?
Then again, maybe NetBSD uses a different way to get the time. When gettimeofday is called, NetBSD does a few I/O accesses to the timer chip (Intel 8253) and returns the result of that. What does Linux do? (I don't have a copy of the linux source handy)
Slashdot Mirror
If you need a hand, ask on the netbsd-users mailing list (http://www.netbsd.org/cgi-bin/subscribe_list.pl?list=netbsd-users). Especially with the new release just being out there should be plenty of people willing to help with whatever issue you have.
(Since you've been running betas for a while you probably know about the mailing lists, so this is more of a PSA for anyone else)
Congrats on getting it installed! :)
Because you don't need to enable every feature that an OS has? If you want to play around with something experimental, temporarily load it as a module, or use Rump or Puffs to isolate the filesystem code to a userland process and hack away.
This sounds like exactly what you'd need if you wanted to do something like accept card payments using your phone, similar to the iPhone credit card adapter. Same tech, different color hat.
I once dropped an old motorola flip phone off a 50 foot cliff, had it split apart into half a dozen different pieces, snapped it back together and it was fine. Somehow I doubt the G1 I have now would survive as well.
Acceleration from a magnitude 5.7 earthquake can be "over 0.1g".
(reference: http://geology.utah.gov/online/pdf/pi-29.pdf)
Acceleration from a car crash, even a minor one, can easily be _several_ g! It's not really comparable, unless the earthquake makes your rack fall over and hit the ground.
Have you ever seen a perfectly good airplane?
To get to the point of flying wing suits, especially at the level as the people you see in various videos: no it's not cheap.
However, it takes years to get to that point. Just like you can't hop on a motorcycle for the first time in your life and expect to win the Grand Prix, you can't jump right into being an expert skydiver. On the other hand, just getting into the sport of skydiving is about as expensive as getting a motorcycle (Actually, less expensive, if you're comparing it to a fancy GoldWing or Harley) and IMO a hell of a lot more fun.
Most people that fly the suits do so well away from obstacles denser than a cloud. With the forward speed you get, it's actually possible to fly around cloud formations. Of course, if you screw up in that situation and get too close, it's not that big of a deal. Still, if you're tracing the vertical lines more than the horizontals, you're doing something wrong.
You don't even need a D license at some places. Having more experience won't hurt, but most people recommending around 200 jumps minimum (C license). Actually all it takes is convincing someone who has a suit to let you borrow it. (of course, if they have enough jumps to actually own a suit, they'll probably make sure you've got the skills to fly it before handing it over :) )
They're also a ton of fun to fly. If you've ever considered getting into the sport (or making a few more jumps if you're already a skydiver), and needed another reason for it, flying a wingsuit is a good one.
eric
uh, no. Sorry, but you're not going to rip your arms and legs off, and suits are definitely not "just shy of the maximum size the human body can stand". The limiting factor is how long your arms and legs are, and how far apart you can spread them. Anyway, even if you were approaching limb wrenching sizes there's a simple solution: bring your arms and legs in. That's what you have to do now when exiting (at least if you want to avoid the tail of the plane), and when opening your chute so you gain enough speed for it to inflate properly.
Also, you don't need any fancy materials, or "electric charge" to make a rigid suit. They already _are_ rigid, using the same method that parachutes use: airspeed to inflate the cells. Some of them even have airlocks to keep them inflated even if you slow down.
Which is a pretty good deal, if you compare how much it costs to do an actual jump out of a plane. Even for experienced skydivers, it is a very cost effective way of getting "air time" (and at twice the interval of a "normal" 60 second skydive)
However, it's mostly useless for flying a wingsuit. The problem is that wearing a wingsuit will convert your downward motion into horizontal motion. Besides the increased time in the air, it's fun to be more flying around rather than falling, but try that in a tunnel with a width of about 14 ft and you won't be very happy.
A fair number of those are bugs for other OSes, due to having pkgsrc issues included in the same bug database. pkgsrc runs on a dozen different platforms so the bug database ends up with a lot of issues not directly relevant to NetBSD. Right now, there are 1233 open bugs relating to pkgsrc, many of which are non-NetBSD issues.
As for the classification of other bugs, you can check out http://www.netbsd.org/Gnats/ for a table of how those are distributed. Quite a few are specific to just a single port.
It's better than RAID in that if your entire main server gets toasted (e.g. literally, your house burns down, or similar), you've still got a backup.
From what I gathered in the article, it isn't similar to a database's logs because it just mirrors the writes, without saving the old disk image. Although it sounds like it would be fairly easy to just save the packet stream and have the ability to replay your disk image to any particular moment in the past.
That would be much better than RAID. After all, backups aren't just to protect against drives failing; they're also to protect against accidental "rm -rf"'s in the wrong place.
As for setting up a new backup server, if it's just a app listening on the backup server, it shouldn't be any more difficult than installing any other application.
You're not understanding how Xen works. Xen doesn't let you run one OS inside another, they run side by side, almost as if they were two processes.
Running OSes inside of Xen and running MS Windows inside of Linux are two completely different things. If you can run MS Windows inside of Linux, whether or not that Linux kernel is running inside of Xen probably won't matter, since for that to work at all you probably have to trap any protected instructions and emulate them. Whether the emulation is implemented using actual ring 0 instructions or Xen hypervisor calls should be irrelevant.
However, you _can_ run Windows inside Xen, and people have done so. It's difficult to do because you need to manage to get a Windows source license and build your own copy with the necessary modifications, but not impossible.
Refute this concrete example then:
// Do evil click tracking here.
<script>
function make_onclick(old_oo)
{
var old_onclick = old_oo;
return function () {
if (old_onclick)
return old_onclick()
}
}
var x = document.getElementsByTagName('a');
for (var i=0;i<x.length;i++)
{
x[i].onclick = make_onclick(x[i].onclick ? x[i].onclick : null);
}
</script>
Put that at the end of any web page and you should be able to run whatever you want on any link click.
It's 1.5 billion gallons of oil, not gas. Oil is currently running around $60 a barrel. 1 barrel is 42 gallons. Assume each windmill will cost $3mil, and 30 will be installed:
$3mil * 30
= 42 years.
$60 / 42 * 1.5mil/year
So it's going to be a while before it pays off, at least if you just take into acocunt the money part of it, and not the environmental aspects.
Actually in NetBSD it's Shift and Page Up/Down.
eh, it's ok. (I've seen it, since I'm a NetBSD developer). The thing to remember is that we were not looking for a mascot so it isn't the same anthropomorphic style as other groups. (i.e. the linux penguin, or the openbsd blowfish)
So this seems like one of those things that would be blindly obvious to anyone "versed in the art". Why doesn't stuff like this get caught _BEFORE_ the patent is issued? Isn't there a comment period before the patent is actually issued? Is there an easy way to get access to those pending patent descriptions?
I would imagine that the slashdot crowd hearing about this in its pending state and having several people respond to the USPTO would have a sanitizing effect.
Of course, since the purpose of the time-timers.cpp program is to time the timing routine, we want to time the actual overhead, including the user/kernel space copy (and the overhead of the function call),
I'm not sure why Linux is so much faster on the gettimeofday() call. I'm guessing it perhaps can retrieve the time directly into the final buffer? Or perhaps it has a more efficient way to copyout the data?
Then again, maybe NetBSD uses a different way to get the time. When gettimeofday is called, NetBSD does a few I/O accesses to the timer chip (Intel 8253) and returns the result of that. What does Linux do? (I don't have a copy of the linux source handy)
eric