I'm working on a project called Linux Trace Toolkit (LTT) that is suitable for an automatic logging.
LTT log every system call at a ns precision in a RAM buffer and then on disk. The events include, for instance, read/write/open operations, system call, interuptions, process state, disk and internet interface operations and so on. You can add specific event by modifying your application and recompile with the LTT library.
LTT is not yet included in the kernel and was not choosen after the "Halloween Freeze" however, the new infrastructure can operate in a "flight recorder" mode that will, for instance, log the last 5 Mb of events that happens on the system.
Of course, when there is a kernel crash, you can not be certain to have those events on disk but this is chicken and egg problem.
Anyway, I believe this king of functionality is in demande by most critical applications. This is very important in the embedded market too where debugging and optimization is very painful.
Coool !
I think that parental pressure on schools official can be as efficient as economic or social pressure;-))
I think that there is a real moral problem when schools are forcing students to use a commercial product...
Well, we are trying to fill the gap between end-user and Open Source software. It is not really what I would call "a niche".
Obvisously, a lot of people know that the polish and ease-of use is not yet there for Linux and EduLinux aim is to open new horizon for free software so that a new user or a window user don't feel lost when using EduLinux...
We choose Mandrake because it share the same goal (end-user & ease of use) and we were more proficient with Mandrake than with any other distro.
Yep !
We share the same ideas : there is a preselection that is correct and secure for new users (KDE, mozilla, open-office,...) but we included all the RPMs for server install and more advanced users that can choose their package manually.
As a consequence, edulinux is 4 CDs big...
It is also possible ti make special-purpose distribution with RPM based distro;-)
Mandrake has a nice repository system for packages so that you can have your own package update and security updates. It is the functionnal equivalent of apt-get (it is called urpmi)
You're absolutely right. French -> english very faulty translation module.
My point is that it's a very _big_ number for beowulf clusters. The biggest one have 8192 processors ( http://www.top500.org/list/2001/11/) and the alimentation and network problem are huge for Beowulf of this size.
Well, if you look at the number of processor of this supercomputer it's 5104 * 640 = 3.2 Trillion processors.
I'm not sure that the beowulf approach can follow this performance path. Of course, each processor is more powerfull however, you have to bring electricity and network to all of them (maybe half or a quarter of them if you use multiprocessor motherboard). Here, the number of processor is _huge_ which allow a massive parallelization of your code.
Of course, some can argue that "we can always build a beowulf of those" but as far as I know, it's not really COTS material and I'm not sure it will be true one day.
Maybe Beowulf will not be able to compete in terms of peak performance. However, for the price it will gives you much more power.
As a conclusion, I would say that Beowulf are less parallel (even with fast network à la myrynet or infiniband or...) than those kind of computer. Not all applications can benefit of the NEC supercomputer (same things for the Beowulfs).
Today NEC is faster and more powerfull but my guess is that it will not last;-)
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LTT log every system call at a ns precision in a RAM buffer and then on disk. The events include, for instance, read/write/open operations, system call, interuptions, process state, disk and internet interface operations and so on. You can add specific event by modifying your application and recompile with the LTT library.
LTT is not yet included in the kernel and was not choosen after the "Halloween Freeze" however, the new infrastructure can operate in a "flight recorder" mode that will, for instance, log the last 5 Mb of events that happens on the system.
Of course, when there is a kernel crash, you can not be certain to have those events on disk but this is chicken and egg problem.
Anyway, I believe this king of functionality is in demande by most critical applications. This is very important in the embedded market too where debugging and optimization is very painful.
Please visit the GULUS when you will be coming home ;-)
Coool ! I think that parental pressure on schools official can be as efficient as economic or social pressure ;-))
I think that there is a real moral problem when schools are forcing students to use a commercial product...
Too bad ;-(
Usually the economic argument and a proactive LUG can make things change but it takes time and a lot of personal investment...
Hello, Website has been translated. Please visit http://www.edulinux.org/spip_en/.
Well, we are trying to fill the gap between end-user and Open Source software. It is not really what I would call "a niche". Obvisously, a lot of people know that the polish and ease-of use is not yet there for Linux and EduLinux aim is to open new horizon for free software so that a new user or a window user don't feel lost when using EduLinux... We choose Mandrake because it share the same goal (end-user & ease of use) and we were more proficient with Mandrake than with any other distro.
Yep ! We share the same ideas : there is a preselection that is correct and secure for new users (KDE, mozilla, open-office, ...) but we included all the RPMs for server install and more advanced users that can choose their package manually.
As a consequence, edulinux is 4 CDs big...
It is also possible ti make special-purpose distribution with RPM based distro ;-)
Mandrake has a nice repository system for packages so that you can have your own package update and security updates. It is the functionnal equivalent of apt-get (it is called urpmi)
Yes !
You're absolutely right. French -> english very faulty translation module.
My point is that it's a very _big_ number for beowulf clusters. The biggest one have 8192 processors ( http://www.top500.org/list/2001/11/)
and the alimentation and network problem are huge for Beowulf of this size.
What for 3.2 millions of processors ?
Well, if you look at the number of processor of this supercomputer it's 5104 * 640 = 3.2 Trillion processors.
...) than those kind of computer. Not all applications can benefit of the NEC supercomputer (same things for the Beowulfs).
;-)
I'm not sure that the beowulf approach can follow this performance path. Of course, each processor is more powerfull however, you have to bring electricity and network to all of them (maybe half or a quarter of them if you use multiprocessor motherboard). Here, the number of processor is _huge_ which allow a massive
parallelization of your code.
Of course, some can argue that "we can always build a beowulf of those" but as far as I know, it's not really COTS material and I'm not sure it will be true one day.
Maybe Beowulf will not be able to compete in terms of peak performance. However, for the price it will gives you much more power.
As a conclusion, I would say that Beowulf are less parallel (even with fast network à la myrynet or infiniband or
Today NEC is faster and more powerfull but my guess is that it will not last
The questions are when and how ?