Well, according to google, 100 horsepower = 254 443.358 btu / hour
[That's just deliveryed power].
Engines are not very efficient.
1 gallon of gasoline per hour = 39 kW 1 Btu per hour = 0.293 W
One gallon of gas per hour = 133105.8 BTU per hour.
But on a highway, you are probably going ~60mhps and getting ~20-30mpg. In other words, you are burning double or triple the 133106 BTU/hour I mentioned above...
Your ADSL modem transmits on 256 carriers (wavelengths), with each carrier modulating a QAM (2-dimensional) signal. In other words, the modem uses 512 dimensions [not explicitly including time].
Storage in 5 dimensions? They've got a long way to go.
IT may or may not be expendable. However, there is a big difference between Computer Engineering and IT....
Computer Engineers actually understand (and often use!) basic Calculus... But those in IT can tell you how actually to deploy security policies across a network. Other than being two professions centered around computing, they have little in common.
Equating the two is like equating a professional chef to someone who flips burgers. Yes, they both deal with food, but there are major differences...
Third world countries aren't going to have such advanced sniper rifles that fire two bullets at a time.
However, they could just have two snipers right next to each other, trained on the same target. One fires and makes the target lay/fall down. The second fires and doesn't miss.
One can recover the financial cost of the initial investment without recovering the energy cost of the initial construction.
[It just means the initial construction used methods which require large amounts of (cheaper) energy.]
Example: Selling bottled water (in the Americas) imported from Fiji brings financial profit but energy inefficiency. [Water could be obtained locally with less energy wasted on transportation]. However, the Fiji water may be financially more profitable [perhaps it has a larger profit margin]. A Fiji water business could reclaim its initial financial investment while consuming more energy than a local-water business.
[This is actually a fundamental flaw of capitalism. One might hastily assume that since energy cost money, market forces would promote energy conservation. Such conservation happens only to a limited extent.]
must be one of those guys who write software with 3-letter variable names...
Why not name a mailserver something friendly as "MailServer-Primary", "MailServer-Backup" ? Is "Nas1" "NAme Server #1" or "Network Attached Storage #1" or "Not Another Server #1" ???? Or "Nude Anal Shit #1" ?
What this thread is missing is that RPC need not be bound to a network interface!
It is possible to close virtually every port off based upon windows configuration alone (i.e. without firewall software or the XP/Vista firewall).
Heck, RPC listening on a network interface is not even necessary to access windows file shares.
The interesting part is this: On some networks, it is possible to assume a static address that you did NOT receive via DHCP and it just might work
Actually this is true with most networks. DHCP is just a UDP-based protocol for assigning IP addresses.
Most cable modems nowadays have a MAC address filter that effectively only allow one network card (or router) behind the cable modem. But unless they have something that matches DHCP-given IP address to MAC address (which would probably be a hassle since a few things have static IPs [DHCP server, DNS, gateway, etc]), what you describe probably still works.
The funny thing is that ARP protocol broadcasts queries to the whole network ("Which MAC address is associated with IP xxxx"). I"ve always wondered if this is really necessary since their DHCP server already knows the MAC addresses to which it has given IP addresses.
One version says the Papermaster will work as head of their iPod/iPhone line (which does not compete directly with IBM's blade server or chip technology).
Do you really think that Apple iPod/iPhone do not compete with IBM blade server or chip technology?
Hurricane Ike knocked out power across Texas, Arkansas, Louisiana, Tennessee, Kentucky, Indiana, and Ohio. We need to divert this money away from worrying about preventing a power grid outage due to an extremely unlikely nuclear strike and towards finding ways to keep natural, regularly occuring forces from bringing down power for 6 million people across the center of the US
The outages caused by Hurricane Ike WERE PREVENTABLE!
In Houston, there are trees completely growing around power poles. The news doesn't talk about this, but regular trimming/maintenance WAS NOT DONE. It is no wonder the branches snapped the lines.
Look at it this way: Natural Gas sevice was not interrupted. Water was only interrupted for 1-2 days due to issues in the pumping station. Why was electricity out for 2 weeks? Because all other utilities have enough sense to BURY their lines. Can you imagine what would have happened if water pipes were run on poles 20 feet off the ground?
Had Houston and other areas buried electrical lines, we wouldn't have been in this mess.
Look back into the early history of this country. Look at the reasons behind the electorial college.
This country was founded on the idea that the mass public shouldn't directly control government, but rather a small group of individuals should run the country. The idea was that a small few knew better than the larger masses.
Perhaps this is a case where the elected officials genuinely believe they are helping their people, desipite going against them.
Here's another perspective: Would Congress have supported Afghanistan & Iraq, Partriot Act, etc after Sept 11th based on their own opinions? What elected official can say "No, I'm voting against the Patriot Act. I am voting against increased airport security. The current system will keep us secure."
That official would never get re-elected. People would accuse him of supporting terrorism.
Perhaps the author used something like LyX and managed to generate really botched up LaTex...
Excel is a very powerful tool. However it seems a bit unusual than such an avid Office fan would type a book in LaTex...
Word can do much of what LaTex does. However LaTex-like abilities (cross-referencing, standarized formatting, etc) require , require very careful disipline -- something most Word users are not accustomed. In word, one CAN use styles the same way one uses tags in LaTex.
Some does, some doesn't. I've worked with the HFE-7500 stuff, which DOES evaporate really fast (much, much faster than water) -- as a result, you can also smell it a little bit,
I'd suggest you probably don't want to be *breathing* that stuff...
I was once employed in a position where I created detailed performance/reliability models for large supercomputers BlueGene/L, etc.
Say you have an application that is infinitely parallelizable [over idealistic assumption]. Adding processors (and ignoring the communications overhead, etc) speeds up the application -- only up to a point.
At some point, adding processors starts to slowdown the entire application. Why? The probability diminishies that all processors will be up for long enough for the application to finish. Even if spare processors are available and the distributed application uses checkpoints, this effect still occurs.
Say a single node/processor has a mean-time-to-failure (MTTF) of 5 years (157680000 seconds). Two hundred thousand nodes have a MTTF of *approximately* 788.4 seconds (it's actually worse). In other words, there is probability of (1/e) [roughly a third] that 788.4 seconds will elapse without any failures. Wouldn't it just be cheaper & easier to have a 20k node computer and an application that runs for 1hr instead of 10 minutes on 200k nodes?
Yes, you could use 3/4 of the processors for active computation and have the other 1/4 as hot spares/etc... But wouldn't it just be simpler to use fewer processors in the first place? I'm not even convinced there are applications that can be efficiently parallelized over 50k nodes, much less than 200k nodes. When communication overhead and redundancies are taken into account, the utility of much more than a few thousand nodes starts to drop radically.
I've also noticed that those in the "supercomputer" field tend to have Computer Science or Physics backgrounds. These developers are more focused on obtaining exact results, which leads to very slow applications. I suspect there are very accurate (and fast) approximations for many the calculations in their applications. They use distributed application frameworks (MPI) that are fairly low-level and rigid. This means complex applications that run (slowly but well) on 1k nodes may not even be scalable to 100k nodes.
In short, 200k nodes cannot be used efficiently for any meaningful amount of time. For long running applications (a few hours), there is little need to use more than a few thousand nodes.
Aside: Don't intelligent people have anything else better to do than to blow each other up?
If your former Sun employee was responsible for the three versions, that's probably why he's a former employee.
In the US, printers are usually sold without USB cables. Many stores will sell USB cables for $10-$20 (closer to $20).
If they wanted to keep cost and prices down, manufacturers would just ship all items without 'optional' parts and include a coupon for the 'optional' part with the main device.
But they don't. Instead they find it easier to not ship the cable, not include the coupon, and not worry about selling their cable next to the printer. They let other companies such as Belkin eat their lunch at dinner prices.
Slashdot Mirror
Well, according to google, 100 horsepower = 254 443.358 btu / hour
[That's just deliveryed power].
Engines are not very efficient.
1 gallon of gasoline per hour = 39 kW
1 Btu per hour = 0.293 W
One gallon of gas per hour = 133105.8 BTU per hour.
But on a highway, you are probably going ~60mhps and getting ~20-30mpg. In other words, you are burning double or triple the 133106 BTU/hour I mentioned above...
At 20mpg, this is about 400 000 BTU per hour.
Is that a lot?
http://www.phy.syr.edu/courses/modules/ENERGY/ENERGY_POLICY/tables.html
I got bad news for these people..
Your ADSL modem transmits on 256 carriers (wavelengths), with each carrier modulating a QAM (2-dimensional) signal. In other words, the modem uses 512 dimensions [not explicitly including time].
Storage in 5 dimensions? They've got a long way to go.
IT may or may not be expendable. However, there is a big difference between Computer Engineering and IT....
Computer Engineers actually understand (and often use!) basic Calculus... But those in IT can tell you how actually to deploy security policies across a network. Other than being two professions centered around computing, they have little in common.
Equating the two is like equating a professional chef to someone who flips burgers. Yes, they both deal with food, but there are major differences...
Third world countries aren't going to have such advanced sniper rifles that fire two bullets at a time.
However, they could just have two snipers right next to each other, trained on the same target. One fires and makes the target lay/fall down. The second fires and doesn't miss.
One can recover the financial cost of the initial investment without recovering the energy cost of the initial construction.
[It just means the initial construction used methods which require large amounts of (cheaper) energy.]
Example: Selling bottled water (in the Americas) imported from Fiji brings financial profit but energy inefficiency. [Water could be obtained locally with less energy wasted on transportation]. However, the Fiji water may be financially more profitable [perhaps it has a larger profit margin]. A Fiji water business could reclaim its initial financial investment while consuming more energy than a local-water business.
[This is actually a fundamental flaw of capitalism. One might hastily assume that since energy cost money, market forces would promote energy conservation. Such conservation happens only to a limited extent.]
How many times can we roll the dice before our luck runs out?
Every single time. After that, there won't be any more dice to roll, or anyone to roll them if they did exist.
If we had some dice, we could roll them, if we existed.
What a relief!
In the wise words of Donald Rumsfield: There are the known knowns, the known unknowns, and the unknown unknowns.
I never did like storing files on "Shiva"
And a server that serves more than 1 role?
Virtualization to the rescue!
must be one of those guys who write software with 3-letter variable names... Why not name a mailserver something friendly as "MailServer-Primary", "MailServer-Backup" ? Is "Nas1" "NAme Server #1" or "Network Attached Storage #1" or "Not Another Server #1" ???? Or "Nude Anal Shit #1" ?
What this thread is missing is that RPC need not be bound to a network interface! It is possible to close virtually every port off based upon windows configuration alone (i.e. without firewall software or the XP/Vista firewall). Heck, RPC listening on a network interface is not even necessary to access windows file shares.
ESET Smart Security. Best $50 I've ever spent on software (except maybe The Orange Box).
ZoneAlarm. Best $0 I've ever spent for Windows software.
Yes, the U.S. Constitution.
Thank you! I'll be here all week!
I think you have a typo there. You really meant "Communist Manifesto".
The interesting part is this: On some networks, it is possible to assume a static address that you did NOT receive via DHCP and it just might work
Actually this is true with most networks. DHCP is just a UDP-based protocol for assigning IP addresses.
Most cable modems nowadays have a MAC address filter that effectively only allow one network card (or router) behind the cable modem. But unless they have something that matches DHCP-given IP address to MAC address (which would probably be a hassle since a few things have static IPs [DHCP server, DNS, gateway, etc]), what you describe probably still works.
The funny thing is that ARP protocol broadcasts queries to the whole network ("Which MAC address is associated with IP xxxx"). I"ve always wondered if this is really necessary since their DHCP server already knows the MAC addresses to which it has given IP addresses.
Ha! I don't, and I had actual sex with a real live woman this morning
And you still read slashdot on the same day??
sometimes bending the "rules" to get a lot of this hardware to work under open source operating systems.
I think you mean (cough) "laws" (/cough)
I used to play Duke Nukem on a 60MHz Pentium with a 2MB video card and 8MB RAM... What is the world coming to!?!?
One version says the Papermaster will work as head of their iPod/iPhone line (which does not compete directly with IBM's blade server or chip technology).
Do you really think that Apple iPod/iPhone do not compete with IBM blade server or chip technology?
You obviously haven't seen the latest iPod!
Hurricane Ike knocked out power across Texas, Arkansas, Louisiana, Tennessee, Kentucky, Indiana, and Ohio. We need to divert this money away from worrying about preventing a power grid outage due to an extremely unlikely nuclear strike and towards finding ways to keep natural, regularly occuring forces from bringing down power for 6 million people across the center of the US
The outages caused by Hurricane Ike WERE PREVENTABLE!
In Houston, there are trees completely growing around power poles. The news doesn't talk about this, but regular trimming/maintenance WAS NOT DONE. It is no wonder the branches snapped the lines.
Look at it this way: Natural Gas sevice was not interrupted. Water was only interrupted for 1-2 days due to issues in the pumping station. Why was electricity out for 2 weeks? Because all other utilities have enough sense to BURY their lines. Can you imagine what would have happened if water pipes were run on poles 20 feet off the ground?
Had Houston and other areas buried electrical lines, we wouldn't have been in this mess.
How dense is the Death Star?
I bet more than 4/3....
Look back into the early history of this country. Look at the reasons behind the electorial college.
This country was founded on the idea that the mass public shouldn't directly control government, but rather a small group of individuals should run the country. The idea was that a small few knew better than the larger masses.
Perhaps this is a case where the elected officials genuinely believe they are helping their people, desipite going against them.
Here's another perspective: Would Congress have supported Afghanistan & Iraq, Partriot Act, etc after Sept 11th based on their own opinions? What elected official can say "No, I'm voting against the Patriot Act. I am voting against increased airport security. The current system will keep us secure."
That official would never get re-elected. People would accuse him of supporting terrorism.
That said, this 700B bailout stinks...
Perhaps the author used something like LyX and managed to generate really botched up LaTex...
Excel is a very powerful tool. However it seems a bit unusual than such an avid Office fan would type a book in LaTex...
Word can do much of what LaTex does. However LaTex-like abilities (cross-referencing, standarized formatting, etc) require , require very careful disipline -- something most Word users are not accustomed. In word, one CAN use styles the same way one uses tags in LaTex.
Some does, some doesn't. I've worked with the HFE-7500 stuff, which DOES evaporate really fast (much, much faster than water) -- as a result, you can also smell it a little bit,
I'd suggest you probably don't want to be *breathing* that stuff...
I was once employed in a position where I created detailed performance/reliability models for large supercomputers BlueGene/L, etc.
Say you have an application that is infinitely parallelizable [over idealistic assumption]. Adding processors (and ignoring the communications overhead, etc) speeds up the application -- only up to a point.
At some point, adding processors starts to slowdown the entire application. Why? The probability diminishies that all processors will be up for long enough for the application to finish. Even if spare processors are available and the distributed application uses checkpoints, this effect still occurs.
Say a single node/processor has a mean-time-to-failure (MTTF) of 5 years (157680000 seconds). Two hundred thousand nodes have a MTTF of *approximately* 788.4 seconds (it's actually worse). In other words, there is probability of (1/e) [roughly a third] that 788.4 seconds will elapse without any failures. Wouldn't it just be cheaper & easier to have a 20k node computer and an application that runs for 1hr instead of 10 minutes on 200k nodes?
Yes, you could use 3/4 of the processors for active computation and have the other 1/4 as hot spares/etc... But wouldn't it just be simpler to use fewer processors in the first place? I'm not even convinced there are applications that can be efficiently parallelized over 50k nodes, much less than 200k nodes. When communication overhead and redundancies are taken into account, the utility of much more than a few thousand nodes starts to drop radically.
I've also noticed that those in the "supercomputer" field tend to have Computer Science or Physics backgrounds. These developers are more focused on obtaining exact results, which leads to very slow applications. I suspect there are very accurate (and fast) approximations for many the calculations in their applications. They use distributed application frameworks (MPI) that are fairly low-level and rigid. This means complex applications that run (slowly but well) on 1k nodes may not even be scalable to 100k nodes.
In short, 200k nodes cannot be used efficiently for any meaningful amount of time. For long running applications (a few hours), there is little need to use more than a few thousand nodes.
Aside: Don't intelligent people have anything else better to do than to blow each other up?
If your former Sun employee was responsible for the three versions, that's probably why he's a former employee.
In the US, printers are usually sold without USB cables. Many stores will sell USB cables for $10-$20 (closer to $20).
If they wanted to keep cost and prices down, manufacturers would just ship all items without 'optional' parts and include a coupon for the 'optional' part with the main device.
But they don't. Instead they find it easier to not ship the cable, not include the coupon, and not worry about selling their cable next to the printer. They let other companies such as Belkin eat their lunch at dinner prices.