OK then, saying companies that needed more servers in the first place but couldn't afford it are now using virtualization because it involves less cost would have been more precise,
But remember that there is a cost to virtualization, it is not free. Every VM involves non negligible overhead. So the company with a crowded server that wants to split it's applications in different VMs will still need to buy a more expensive server. If they could't afford a second less expensive server in the first place to split their applicatons while still running them natively, how can they afford a more expensive server now?
I understand. Before companies needed to run many physical servers to accomplish what you describe. I have seen it many times. Now they need fewer servers to do this. You have just described server consolidation !;-))
This is kind of obvious, I used to use more machines for security reasons, now I use less machines but they are more powerful. When you do server consolidation, it implies that applications used to run on different hardware for security and stability reason will now be running on the same hardware within different VMs. So how can they say "protect applications from the vagaries of the operating environments" is opposed to "consolidating hardware box".
"Consolidating hardware boxes" implies "protect applications from the vagaries of the operating environments" you just do that with less machines.
I use virtualization because it leaves me with less physical servers to manage, "protect applications from the vagaries of the operating environments" was already done before virtualization. So, virtualization doesn't help me "protect applications from the vagaries of the operating environments", it helps me because I have less servers to manage.
I actually own both a Cable and DSL modem. They are attached to my linux router, each with its own network interface. I never switch, linux does it for me if one of the link is down; routing trafic through the remaining link that is up. Normally, both links are up and linux does load balancing between the providers;-)
True, I would say a machine packed with RAM will wear the drives about 10 times slower than a machine tight on memory. By "tight on memory" I do NOT mean a machine swapping like crazy. A lot of machines tight on memory aren't using their swap-space at all.
The basic principle is that all spare RAM is used as IO buffers and caches thus lowering the number of physical accesses to the drives needed, lowering drive wear and speeding up the machine. You can never have enough RAM, unless you have more RAM than drive space;-)
What are the chances of success of a company specifically advertising that they don't overlook any spyware (including intelligence services spyware) from any country including US and making their business model on it?
I just ordered my IPhone. I had to pay extra to have the wireless capability taken out and have them fit an RJ45 jack on the Iphone instead. I am sure I will have the best network connectivity possible. Screw them with their wireless crap;-)
Thanks,
I am glad to learn that in PHP, backward incompatible means the same as backward compatible in Java.
The PHP upgrade page list backward incompatible changes.
I would never write something like that anyways...
Have you noticed a correct usage of the verb "to comprise" is also given ?
The programme comprises two short plays (they were chosen to make it up)
So "Fructose comprises of table sugar and corn syrup" means : "Fructose is made of sugar table and corn syrup. Let me doubt words could have the opposite meaning as the language evolves.
consist, comprise, constitute, or compose
To consist of something is to be made up of it: The programme consisted of two short plays. To comprise something has the same meaning, often implying that the whole is regarded from the point of view of its individual parts: The programme comprises two short plays (they were chosen to make it up). To constitute something is to form a whole, especially of dissimilar components: Wealth and health do not necessarily constitute happiness. To compose means the same, but implies that the components have something in common: Water is composed of hydrogen and oxygen. A common mistake is to confuse consist and comprise, saying, for example: The programme is comprised of two short plays. http://www.tiscali.co.uk/reference/dictionaries/en glish/data/d0081813.html
Fine with me ! I suggested the JVMs as candidates but I use sh scripts for quite a lot of stuff and I find it quite nice and extremly powerful. I never looked at the sources although...
Of course, I wasn't saying java is some kind of perfect solution. Even in Sun's reference implementation there is plenty of bugs http://bugs.sun.com/bugdatabase/index.jsp.
I wasn't talking about the write once, runs everywhere Sun's paradigm either, that's another story;-)
Well written C/C++ code is pretty much write once, runs everywhere too.
The best I have seen are the JVMs from java 1.0 to java 6. Of course this doesn't qualify at the application level but it is still a great piece of software.
I have used other tools, namely Microsoft librairies and especially with MS librairies, the amount of time I have lost intrepreting strange results I was getting and fixing the problem was incredibly high. 7 times out of 10, the problem was a poor (buggy) implementation of what the library was supposed to do. And 3 times out of 10, it was OUR code, very frustrating and time consuming because you then have to PROOVE that the library is the problem and fill up a bug report.
With java, 99% of the time, OUR code is the problem. That's a great gain in productivity !
When I started with java, I was impressed by the structure of the JVM which I have studied extensively. I also liked the javadocs which I still use all the time given the high number of classes in java nowadays. I have never looked back since.
In our projects, to keep things clean and nicely organized, we just inspire ourselves from how it is done in the JVM source code and we do not try to re-invent the wheel with our own fancy way to do things.
-Put the entire virtual machine + disks on a encrypted truecrypt volume
I could have suggested that as a better way to protect his data of course, I already do it for some data.
But that still wouldn't allow him to wipe out the data once his computer falls into ennemy hands;-) Ennemy is goins to have a much harder time reading the data.
I would need more details about your case because there was not a single method that was removed in java 1.4. All methods suported in 1.3 are supported in 1.4 and they do take the same number of parameters. In 1.4, like in any updates, new methods and classes are ADDED. But the old 1.3,1.2,1.1,1.0 methods and classes are still supported. Based on that, I don't understand how what you described could occur.
As far as the MS proxy problems, it was probably the more sophisticated HTTP/1.1 handling in newer versions of java that gave problems to your old proxy that did not support HTTP/1.1 proxying correctly. Forcing HTTP/1.0 or changing the setting of your HTTP Connection with regards to keep-alives might have solved this problem.
Does anybody on/. have experience with ofbiz / opentaps to do HR management and linking to payroll?
I have been looking briefly at opentaps recently. I did not find much documentation so far and I am looking forward to hear success stories with the product.
Any hints or evaluation of the product is welcome !
I would just wish to point out that, regardig jar files and Tag Libraries, the golden rule is to not put them in your global server scope. Put all your jar files and Tag Libraries in application specific scopes.
I run application servers with applications that use different versions of the jar files and different versions of the Tag Librairies without problems. So I do not really understand what upgrading my application server or the JVM has to do with the versions of the jar files and the versions of the Tag librairies I use in my applications.
Slashdot Mirror
OK then, saying companies that needed more servers in the first place but couldn't afford it are now using virtualization because it involves less cost would have been more precise,
But remember that there is a cost to virtualization, it is not free. Every VM involves non negligible overhead. So the company with a crowded server that wants to split it's applications in different VMs will still need to buy a more expensive server. If they could't afford a second less expensive server in the first place to split their applicatons while still running them natively, how can they afford a more expensive server now?
I understand. Before companies needed to run many physical servers to accomplish what you describe. I have seen it many times. Now they need fewer servers to do this. You have just described server consolidation ! ;-))
This is kind of obvious, I used to use more machines for security reasons, now I use less machines but they are more powerful. When you do server consolidation, it implies that applications used to run on different hardware for security and stability reason will now be running on the same hardware within different VMs. So how can they say "protect applications from the vagaries of the operating environments" is opposed to "consolidating hardware box".
"Consolidating hardware boxes" implies "protect applications from the vagaries of the operating environments" you just do that with less machines.
I use virtualization because it leaves me with less physical servers to manage, "protect applications from the vagaries of the operating environments" was already done before virtualization. So, virtualization doesn't help me "protect applications from the vagaries of the operating environments", it helps me because I have less servers to manage.
I actually own both a Cable and DSL modem. They are attached to my linux router, each with its own network interface. I never switch, linux does it for me if one of the link is down; routing trafic through the remaining link that is up. Normally, both links are up and linux does load balancing between the providers ;-)
True, I would say a machine packed with RAM will wear the drives about 10 times slower than a machine tight on memory. By "tight on memory" I do NOT mean a machine swapping like crazy. A lot of machines tight on memory aren't using their swap-space at all.
The basic principle is that all spare RAM is used as IO buffers and caches thus lowering the number of physical accesses to the drives needed, lowering drive wear and speeding up the machine. You can never have enough RAM, unless you have more RAM than drive space ;-)
What are the chances of success of a company specifically advertising that they don't overlook any spyware (including intelligence services spyware) from any country including US and making their business model on it?
Cool and corect, I already replied to the poster agreeing he is correct and explaning the reason of my mistake ;-)
You are right, sorry it was a long time ago.
I now remember asking my aunt :
What will we get when we try to slice this Moebius strip in 2?
After the fact, she said : Oh ! still one Moebius !
Then, what will we get when we try to slice this Moebius in 3?
After the fact, she said : Oh ! 2 Moebius!
I just confused my aunt's words with realty ! I remember the drawing the line test also ;-)
Cheers,
As a kid, I useeed to play with Möbius strips made out of paper, here is a really good trick for kids.
1) Build 2 Möbius strips out of paper.
2) Cut one in the middle of the strip -> gives a longer Möbius strip ( not two smaller one )
3) Cut the other at one third of its width and continue all around the strip -> gives a 2 Möbius strips, one shorter than the other.
Funny, I still remember this after so many years.
I just ordered my IPhone. I had to pay extra to have the wireless capability taken out and have them fit an RJ45 jack on the Iphone instead. I am sure I will have the best network connectivity possible. Screw them with their wireless crap ;-)
common, never ask for addresses, it's eitheir tonight (preferably right away) or never. Be proud ;-)
Thanks, I am glad to learn that in PHP, backward incompatible means the same as backward compatible in Java. The PHP upgrade page list backward incompatible changes.
I would never write something like that anyways...
Have you noticed a correct usage of the verb "to comprise" is also given ?
The programme comprises two short plays (they were chosen to make it up)
So "Fructose comprises of table sugar and corn syrup" means : "Fructose is made of sugar table and corn syrup. Let me doubt words could have the opposite meaning as the language evolves.
It just seems to me that the author and you confuse "to comprise" and "to compose". You may also want to read http://www.northeastern.edu/toolkit/messaging/styl e13.html#132 in order to perfect your article writing skills.
Note also that if the totals in fructose did not amount to more than 100%, it would have been more difficult to find the meaning of the sentence.
But to your defense, it seems to be accepted in the /. slang language ;-)
http://www.urbandictionary.com/define.php?term=com prise
consist, comprise, constitute, or compose To consist of something is to be made up of it: The programme consisted of two short plays. To comprise something has the same meaning, often implying that the whole is regarded from the point of view of its individual parts: The programme comprises two short plays (they were chosen to make it up). To constitute something is to form a whole, especially of dissimilar components: Wealth and health do not necessarily constitute happiness. To compose means the same, but implies that the components have something in common: Water is composed of hydrogen and oxygen. A common mistake is to confuse consist and comprise, saying, for example: The programme is comprised of two short plays. http://www.tiscali.co.uk/reference/dictionaries/en glish/data/d0081813.html
That's up to 140% of itself ;-) Better than our athletes who sometimes give 110% of themselves !
Fine with me ! I suggested the JVMs as candidates but I use sh scripts for quite a lot of stuff and I find it quite nice and extremly powerful. I never looked at the sources although...
Common, FOX, CNN, ABC, NBC, CBS, Press agencies, etc. don't verify their stories. It's unfair to ask /. do do it.
Of course, I wasn't saying java is some kind of perfect solution. Even in Sun's reference implementation there is plenty of bugs http://bugs.sun.com/bugdatabase/index.jsp.
I wasn't talking about the write once, runs everywhere Sun's paradigm either, that's another story ;-)
Well written C/C++ code is pretty much write once, runs everywhere too.
I was just saying I like the product overall.
The best I have seen are the JVMs from java 1.0 to java 6. Of course this doesn't qualify at the application level but it is still a great piece of software.
I have used other tools, namely Microsoft librairies and especially with MS librairies, the amount of time I have lost intrepreting strange results I was getting and fixing the problem was incredibly high. 7 times out of 10, the problem was a poor (buggy) implementation of what the library was supposed to do. And 3 times out of 10, it was OUR code, very frustrating and time consuming because you then have to PROOVE that the library is the problem and fill up a bug report.
With java, 99% of the time, OUR code is the problem. That's a great gain in productivity !
When I started with java, I was impressed by the structure of the JVM which I have studied extensively. I also liked the javadocs which I still use all the time given the high number of classes in java nowadays. I have never looked back since.
In our projects, to keep things clean and nicely organized, we just inspire ourselves from how it is done in the JVM source code and we do not try to re-invent the wheel with our own fancy way to do things.
-Put the entire virtual machine + disks on a encrypted truecrypt volume
I could have suggested that as a better way to protect his data of course, I already do it for some data.
But that still wouldn't allow him to wipe out the data once his computer falls into ennemy hands;-) Ennemy is goins to have a much harder time reading the data.
How are you going to wipe out the virtual computer once the computer is into ennemy hands ? ;-)
Hi Tony,
I would need more details about your case because there was not a single method that was removed in java 1.4. All methods suported in 1.3 are supported in 1.4 and they do take the same number of parameters. In 1.4, like in any updates, new methods and classes are ADDED. But the old 1.3,1.2,1.1,1.0 methods and classes are still supported. Based on that, I don't understand how what you described could occur.
As far as the MS proxy problems, it was probably the more sophisticated HTTP/1.1 handling in newer versions of java that gave problems to your old proxy that did not support HTTP/1.1 proxying correctly. Forcing HTTP/1.0 or changing the setting of your HTTP Connection with regards to keep-alives might have solved this problem.
Does anybody on /. have experience with ofbiz / opentaps to do HR management and linking to payroll?
I have been looking briefly at opentaps recently. I did not find much documentation so far and I am looking forward to hear success stories with the product.
Any hints or evaluation of the product is welcome !
Thanks,
Thanks for your insightful reply!
I would just wish to point out that, regardig jar files and Tag Libraries, the golden rule is to not put them in your global server scope. Put all your jar files and Tag Libraries in application specific scopes.
I run application servers with applications that use different versions of the jar files and different versions of the Tag Librairies without problems. So I do not really understand what upgrading my application server or the JVM has to do with the versions of the jar files and the versions of the Tag librairies I use in my applications.