Good point--there's a distinction between multiplexed IO and asynchronous IO, and select() is definitely the former.
I think a lot of people (myself included) tend to use the term non-blocking IO loosely to mean both async and multiplexed IO, the rationale being that both strategies allow you avoid having your main thread of execution block indefinitely on an IO call. But you are right in pointing out that select is a synchronous call, and you certainly can make select() block indefinitely by not specifying a timeout.
I think we're on the same page here... I'm probably just abusing the term ``non-blocking IO.''
You can avoid a lot of these problems in many cases if you use a function like "select()" in a single-threaded program (which, IIRC, Java unfortunately doesn't support).
The standard java NIO APIs support non-blocking IO (which is what select() is).
The net revenue for Transmeta in 2002 was $14.1 Million (1.5 Q1, 6.4 Q2, 6.3 Q3).
Unfortunately, revenue only tells part of the story. Transmeta's net loss for the fiscal year ended 12/31/2002 was $110 million (source http://biz.yahoo.com/p/t/tmta.html)
I think Transmeta's a great company... just want to make sure we paint the complete picture here: they lost about $100 million last year, and their stock is worth a little $1.00.
Does it have to be ``type crash?'' Why would ``crash'' be hardcoded into any library? It is just the lack of the ``='' that's doing it? I'd try it myself, but I don't own a copy if IE. Can anyone confirm?
You should try to start an ACM chapter at your high school. We had one when I was in college (http://acm.jhu.edu), and it was a huge success. Because there are so many successful student chapters, you should be able to easily convince a member of your faculty to sponsor you. It would be really sweet if your school would pay for student memberships to ACM too. They're not very expensive if I remember correctly. See http://acm.org for more details.
Hmm... I noticed that people usually talk about disk IO when discussing IO scheduling, but there are several other kinds of IO. How is the kernel set up? Is there a different IO scheduler for every different type of IO device (network, disk, etc)?
What about something like USB where you have no idea what kind of device is at the other end?
How can this possibly work?
on
Cashless Society
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· Score: 2, Insightful
Ok, let's think about how such a thing could be implemented...
If the card's worth were encoded on the magnetic strip itself, it would be a matter of days before someone figures out how to hack the thing and add as much cash as they want to it.
If, on the other hand, the card's worth were stored in some central location, the thing is not anonymous at all. There would be a centralied account somewhere (which necessitates some form of ID number by which people may be tracked), and there's no way guarantee that someone's not keeping track of transactions to and from that account.
I would argue that such a card can be no more anonymous that a standard debit card, which most of us carry today.
Your argument is an interesting one, but the problem is that DNS itself is insecure. That's the whole reason projects like DNSSEC exist. If we ever reach the point when we can guarantee that DNS queries are secure, then your proposal would be completely valid. Let's hope we get there someday:)
I work for a medium (~300 person) software company, and the IBM 600X was the standard issue laptop a few years ago--most still have them. We have so much trouble with batteries that our consultants and salespeople actually have to check a battery out of the ``common-good-battery-pool'' when then travel.
The majority of our employees have about a 30 second battery life (just enough to run from an office to a conference room), and for budgetary reasons we can't afford to keep replacing them every 6 months.
Bank of America is, IMHO, a lousy bank. I hate their ATM fees, minimum balance requirements, and telemarketing. The sole reason I use them is because they have flawless support for mozilla, NS6, and opera (not masqued as IE).
Banks need to realize that many of us choose a bank for the web services they provide. As more and more people are using ``alternative'' OS's at work and at home, I would urge banks to have their developers pay attention to the standards (no, not the MS knowledge base crap, but the real W3 standards) and make their web services work with all web browsers. Personally, as a developer, I do not find this to be a difficult task--in many cases it is more difficult to support IE than a compliant browser.
The big problem with any open source CVS replacement is going to be acceptance and stability. I use CVS because it's been around forever. It is going to be quite a long time before anyone starts using a new system, simply because no one's going to want to gamble with their source code.
I think the key to getting the development community to use a CVS replacement will be a strong set of unit and acceptance tests to accompany it, but even with this, it will take years before most people are willing to switch over from CVS.
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After that, ask them to spell "they're." Hint: it's not "the're," "ther're," or "there." For the bonus, ask them the right way to spell "somwhere."
Good point--there's a distinction between multiplexed IO and asynchronous IO, and select() is definitely the former.
I think a lot of people (myself included) tend to use the term non-blocking IO loosely to mean both async and multiplexed IO, the rationale being that both strategies allow you avoid having your main thread of execution block indefinitely on an IO call. But you are right in pointing out that select is a synchronous call, and you certainly can make select() block indefinitely by not specifying a timeout.
I think we're on the same page here... I'm probably just abusing the term ``non-blocking IO.''
You can avoid a lot of these problems in many cases if you use a function like "select()" in a single-threaded program (which, IIRC, Java unfortunately doesn't support).
The standard java NIO APIs support non-blocking IO (which is what select() is).
The net revenue for Transmeta in 2002 was $14.1 Million (1.5 Q1, 6.4 Q2, 6.3 Q3).
Unfortunately, revenue only tells part of the story. Transmeta's net loss for the fiscal year ended 12/31/2002 was $110 million (source http://biz.yahoo.com/p/t/tmta.html)
I think Transmeta's a great company... just want to make sure we paint the complete picture here: they lost about $100 million last year, and their stock is worth a little $1.00.
Does it have to be ``type crash?'' Why would ``crash'' be hardcoded into any library? It is just the lack of the ``='' that's doing it? I'd try it myself, but I don't own a copy if IE. Can anyone confirm?
You should try to start an ACM chapter at your high school. We had one when I was in college (http://acm.jhu.edu), and it was a huge success. Because there are so many successful student chapters, you should be able to easily convince a member of your faculty to sponsor you. It would be really sweet if your school would pay for student memberships to ACM too. They're not very expensive if I remember correctly. See http://acm.org for more details.
What do we call people who work in the IT function? How about information technologist?! Isn't that the definition of the title?
Hmm... I noticed that people usually talk about disk IO when discussing IO scheduling, but there are several other kinds of IO. How is the kernel set up? Is there a different IO scheduler for every different type of IO device (network, disk, etc)?
What about something like USB where you have no idea what kind of device is at the other end?
If the card's worth were encoded on the magnetic strip itself, it would be a matter of days before someone figures out how to hack the thing and add as much cash as they want to it.
If, on the other hand, the card's worth were stored in some central location, the thing is not anonymous at all. There would be a centralied account somewhere (which necessitates some form of ID number by which people may be tracked), and there's no way guarantee that someone's not keeping track of transactions to and from that account.
I would argue that such a card can be no more anonymous that a standard debit card, which most of us carry today.
Your argument is an interesting one, but the problem is that DNS itself is insecure. That's the whole reason projects like DNSSEC exist. If we ever reach the point when we can guarantee that DNS queries are secure, then your proposal would be completely valid. Let's hope we get there someday :)
Haven't you seen the TV commercial with the out-of-work auto painting robots playing cards? It's been airing for weeks.
The majority of our employees have about a 30 second battery life (just enough to run from an office to a conference room), and for budgetary reasons we can't afford to keep replacing them every 6 months.
The other guy was Erich Gamma, of Design Patterns fame.
Bank of America is, IMHO, a lousy bank. I hate their ATM fees, minimum balance requirements, and telemarketing. The sole reason I use them is because they have flawless support for mozilla, NS6, and opera (not masqued as IE).
Banks need to realize that many of us choose a bank for the web services they provide. As more and more people are using ``alternative'' OS's at work and at home, I would urge banks to have their developers pay attention to the standards (no, not the MS knowledge base crap, but the real W3 standards) and make their web services work with all web browsers. Personally, as a developer, I do not find this to be a difficult task--in many cases it is more difficult to support IE than a compliant browser.
The big problem with any open source CVS replacement is going to be acceptance and stability. I use CVS because it's been around forever. It is going to be quite a long time before anyone starts using a new system, simply because no one's going to want to gamble with their source code.
I think the key to getting the development community to use a CVS replacement will be a strong set of unit and acceptance tests to accompany it, but even with this, it will take years before most people are willing to switch over from CVS.
OK... maybe I was wrong :)
I bet there are a ton of moms running Linux. If you're a Linux mom reply to this thread!
Steel is made of mostly iron with a little bit of carbon mixed in. Different types of steel have different amounts of carbon.
A great book about changing the design of existing code.
You mean those big numbers underneath the real station numbers on my clock radio actually do something?