Re: [Beowulf] Re: "hobbyists"

On Fri, 20 Jun 2008, Perry E. Metzger wrote: "Robert G. Brown" <[EMAIL PROTECTED]> writes: On Fri, 20 Jun 2008, Chris Samuel wrote: - "Joe Landman" <[EMAIL PROTECTED]> wrote: People spend lots of time and effort on security theater. Make up odd rules for passwords. Make them hard to g

Re: [Beowulf] Re: "hobbyists"

"Robert G. Brown" <[EMAIL PROTECTED]> writes: > On Fri, 20 Jun 2008, Chris Samuel wrote: >> - "Joe Landman" <[EMAIL PROTECTED]> wrote: >> >>> People spend lots of time and effort on security theater. Make up odd >>> rules for passwords. Make them hard to guess and crack. Well, is >>> that t

Re: [Beowulf] Re: "hobbyists"

Joe Landman <[EMAIL PROTECTED]> writes: >> Isn't it a common practice in HPC to keep security rules relatively >> relaxed *inside* a cluster (passwordless logins between compute >> nodes for instance), whilst trying to harden the links to the >> external world? > > Yes. Leave the window wide open

Re: [Beowulf] Re: "hobbyists"

- "Robert G. Brown" <[EMAIL PROTECTED]> wrote: > Do you have an recent contemporary evidence for that? Not since we moved to LDAP, but a few years back the cluster that I inherited (and that was configured by a large vendor who shall remain nameless) was still running vanilla YP. Although w

Re: [Beowulf] Re: "hobbyists"

On Fri, 20 Jun 2008, Chris Samuel wrote: - "Joe Landman" <[EMAIL PROTECTED]> wrote: People spend lots of time and effort on security theater. Make up odd rules for passwords. Make them hard to guess and crack. Well, is that the vector for break-ins? Weak passwords? Yeah - sadly.. :-

Re: [Beowulf] Re: "hobbyists"

- "Peter St. John" <[EMAIL PROTECTED]> wrote: > War is hell, but I wouldn't call it a "suicide device". http://www.damninteresting.com/?p=783 # The Davy Crockett's timer allowed a minimum shot # distance of about 1,000 feet, but such inept use # of the weapon would certainly result in the d

Re: [Beowulf] Re: "hobbyists"

- "Joe Landman" <[EMAIL PROTECTED]> wrote: > People spend lots of time and effort on security theater. Make up odd > rules for passwords. Make them hard to guess and crack. Well, is > that the vector for break-ins? Weak passwords? Yeah - sadly.. :-( -- Christopher Samuel - (03) 9925 47

Re: [Beowulf] Re: "hobbyists"

Kilian CAVALOTTI wrote: On Thursday 19 June 2008 05:08:43 pm Joe Landman wrote: SElinux and Apparmor try to limit the damage even in a secure setting, though I am not sure how well they do there. If you want/need to use things like Lustre, for instance, you can forgot about SELinux and AppArm

Re: [Beowulf] Re: "hobbyists"

On Thursday 19 June 2008 05:08:43 pm Joe Landman wrote: > SElinux and Apparmor try to limit the damage > even in a secure setting, though I am not sure how well they do > there. If you want/need to use things like Lustre, for instance, you can forgot about SELinux and AppArmor, it simply doesn't

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

On Thursday 19 June 2008 04:32:11 pm Chris Samuel wrote: > - "Kilian CAVALOTTI" <[EMAIL PROTECTED]> wrote: > > AFAIK, the multi GPU Tesla boxes contain up to 4 Tesla processors, > > but are hooked to the controlling server with only 1 PCIe link, > > right? Does this spell like "bottleneck" to a

Re: [Beowulf] Re: "hobbyists"

Chris Samuel wrote: - "Robert G. Brown" <[EMAIL PROTECTED]> wrote: IIRC almost any of the high-end encryption routines available within linux are effectively uncrackable, certainly uncrackable to somebody with less than NSA-class resources. As long as the implementation is correct.. Debia

Re: [Beowulf] Re: "hobbyists"

- "Robert G. Brown" <[EMAIL PROTECTED]> wrote: > IIRC almost any of the high-end encryption routines available within > linux are effectively uncrackable, certainly uncrackable to somebody > with less than NSA-class resources. As long as the implementation is correct.. Debian SSL. :-) Human

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

- "Kilian CAVALOTTI" <[EMAIL PROTECTED]> wrote: > AFAIK, the multi GPU Tesla boxes contain up to 4 Tesla processors, but > are hooked to the controlling server with only 1 PCIe link, right? > Does this spell like "bottleneck" to anyone? The nVidia website says: http://www.nvidia.com/object/

Re: [Beowulf] Re: "hobbyists"

On Thu, 2008-06-19 at 13:51 -0400, Robert G. Brown wrote: > > > why worry about ICBMs when DHL/FedEx will deliver it to your selected > > doorstep? > > Well, even a small bomb would be pretty heavy. Kind of at the boundary > of what FedEx will delivery;-) Recall that the first British nuclear

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

On Thursday 19 June 2008 02:22:02 pm John Hearns wrote: > One thing I've never understood, and hopefully someone on here can > explain clearly, is why the onboard graphics is normally disabled > when you add a PCI-e card. It probably comes from the times when dual-head configurations were still

Re: [Beowulf] SuperMicro and lm_sensors

On Thu, Jun 19, 2008 at 11:28:08AM -0700, Bernard Li wrote: > Hi David: Hey Bernard! > On Thu, Jun 19, 2008 at 6:50 AM, Lombard, David N > <[EMAIL PROTECTED]> wrote: > > > Did you look for /proc/acpi/thermal_zone/*/temperature The glob is for > > your BIOS-defined ID. If it does exist, that's

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

On Thu, 2008-06-19 at 12:52 -0400, Peter St. John wrote: > I dug up this pdf from Nvidia: > http://www.nvidia.com/docs/IO/43395/tesla_product_overview_dec.pdf > Since I can't imagine coding a graphics card while it serves my X :-) > I supposed one might put the PCIE card in a box with a cheap SVGA

Re: [Beowulf] Re: "hobbyists"

At 01:02 PM 6/19/2008, James Cownie wrote: Returning the thread slightly nearer its original topic, I'm surprised that no one mentioned this... http://www.engadget.com/2008/05/21/open-source-ogd1-graphics-card-

Re: [Beowulf] SuperMicro and lm_sensors

Greg Lindahl <[EMAIL PROTECTED]> writes: > On Thu, Jun 19, 2008 at 10:50:25PM +0400, Mikhail Kuzminsky wrote: > >> AFAIK it depends from BIOS. On my Tyan S2932 w/last BIOS version this >> directory is empty. > > On the Opteron box that I got lm_sensors working on, the k8temp module > was required

Re: [Beowulf] Re: "hobbyists"

Regarding: [RGB] Fortunately, there isn't that much Uranium on the planet, and we're burning it at a furious rate. We could conceivably deplete the currently known reserves in a matter of decades; it is NOT a long term solution to the problem of fossil fuel use. rgb Isn't there a scheme for

Re: [Beowulf] Re: "hobbyists"

On Thu, 19 Jun 2008, Perry E. Metzger wrote: "Dark Sun" by Richard Rhodes is probably better (and more entertaining). It describes the Teller-Ulam mechanism in some detail. I will point out that, if the description of the initial Ivy Mike test is to be taken as an indication, it actually require

Re: [Beowulf] Re: "hobbyists"

On Thu, 19 Jun 2008, Jim Lux wrote: Uh.. probably not.. That's the "alarm clock" or "layer cake" design and has some issues. I refer interested readers to Morland's 1977 article in "The Progressive" for more information. Fusion boosting of fission, OTOH, is relatively easy to accomplish and a

Re: [Beowulf] Re: "hobbyists"

Jim Lux <[EMAIL PROTECTED]> writes: >>Thermonuclear fusion and the 100+ KT to MT range are similarly >>straightforward. From what I recall, one can just monkey around with >>building bigger bombs surrounded by more fissile material and get close >>to the latter, adding fusile material such as tri

Re: [Beowulf] Re: "hobbyists"

Returning the thread slightly nearer its original topic, I'm surprised that no one mentioned this... http://www.engadget.com/2008/05/21/open-source-ogd1-graphics-card-up-for-pre-order/ as a good place for hobbyists who want to play with FPGAs for calculation. -- -- Jim -- James Cownie <[EM

Re: [Beowulf] Re: "hobbyists"

"Robert G. Brown" <[EMAIL PROTECTED]> writes: >> I can log in using your credentials if I have your private key and you >> are using SSH with public key authentication. However, even if I have >> both of your private and public keys, the ephemeral key used for a >> particular session is agreed to

[Beowulf] found this amusing

Not wholly OT ... Running some benchmarks for a customer, and doing a little baseline performance gathering. This is Windows 2008 RC2 32 bit on one of our JackRabbit units. Well, it appears that there is either a bug in the performance counter, or the JackRabbit is simply too fast ... Hav

Re: [Beowulf] Re: "hobbyists"

On Thu, 19 Jun 2008, Kilian CAVALOTTI wrote: On Thursday 19 June 2008 06:58:44 am Robert G. Brown wrote: Getting too big or two small an explosion can either kill your own troops or not kill all of the enemy on an actual battlefield. To add some more OT stuff to this thread, I don't think a n

Re: [Beowulf] Re: "hobbyists"

On Thu, 19 Jun 2008, Perry E. Metzger wrote: I can log in using your credentials if I have your private key and you are using SSH with public key authentication. However, even if I have both of your private and public keys, the ephemeral key used for a particular session is agreed to using Diffi

[Beowulf] Re: "hobbyists"

It's off-topic, certainly. The wiki entry indicates ranges from 2 to 4 thousand meters (depending on model) and effective radius in hundreds of meters. Certainly dangerous for everyone, but so is a howitzer battery barrage. By "order" I meant nearest order of magnitude (factor of ten). The range of

Re: [Beowulf] SuperMicro and lm_sensors

On Thu, Jun 19, 2008 at 10:50:25PM +0400, Mikhail Kuzminsky wrote: > AFAIK it depends from BIOS. On my Tyan S2932 w/last BIOS version this > directory is empty. On the Opteron box that I got lm_sensors working on, the k8temp module was required for some of the temperatures. But that directory is

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

On Wed, Jun 18, 2008 at 04:34:59PM -0700, Bill Broadley wrote: > Cuda seems to take a different approach, instead of trying to > auto-parallelize > a loop, it requires a function pointer to the code, and the function must > declare it's exit condition. In the end, CUDA doesn't end up being that

Re: [Beowulf] SuperMicro and lm_sensors

In message from "Bernard Li" <[EMAIL PROTECTED]> (Thu, 19 Jun 2008 11:28:08 -0700): Hi David: On Thu, Jun 19, 2008 at 6:50 AM, Lombard, David N <[EMAIL PROTECTED]> wrote: Did you look for /proc/acpi/thermal_zone/*/temperature The glob is for your BIOS-defined ID. If it does exist, that's the

Re: [Beowulf] SuperMicro and lm_sensors

Hi David: On Thu, Jun 19, 2008 at 6:50 AM, Lombard, David N <[EMAIL PROTECTED]> wrote: > Did you look for /proc/acpi/thermal_zone/*/temperature The glob is for > your BIOS-defined ID. If it does exist, that's the value that drives > /proc/acpi/thermal_zone/*/trip_points > > See also /proc/acpi/

Re: [Beowulf] Re: "hobbyists"

The plan as per my limited understanding was to engage at Fulda Gap, slow the advance and then hit them with tactical nukes in E. Germany and further behind the lines. the Davey Crockett could be used in multiples in such a situation (and in combination with helicopter and ground anti-tank unit

Re: [Beowulf] Re: "hobbyists"

On Thursday 19 June 2008 11:13:36 am you wrote: > Strategic nukes, no. Tactical nukes, yes. That's right, I think I've been confused over the terms. Cheers, -- Kilian ___ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest m

Re: [Beowulf] Re: "hobbyists"

According to one weapons designer the only safe way to use it was to fire from a hilltop into a valley from a jeep and then drive like hell into the next valley. If you are within 150m you will receive an instantly lethal dose. Within 400m you will receive up to 600 rem with is lethal. Even a

Re: [Beowulf] Re: "hobbyists"

At 06:58 AM 6/19/2008, Robert G. Brown wrote: On Wed, 18 Jun 2008, Jim Lux wrote: So.. if your (foreign person) buddy is designing thermonuclear devices in their garage, and they complain about how slow it is to run the hydrocodes to simulate stuff, better not hand them that old copy of Sterl

Re: [Beowulf] Re: "hobbyists"

Kilian CAVALOTTI wrote: On Thursday 19 June 2008 10:11:18 am you wrote: To add some more OT stuff to this thread, I don't think a nuclear weapon has ever been used (or even considered being used) to kill troops on a battlefield. look up "tactical nukes". These were the USA's only hope of def

Re: [Beowulf] Re: "hobbyists"

War is hell, but I wouldn't call it a "suicide device". The range of the rocket is on the order of 1000 meters, and the effective radius at the target is on the order of 100 m. You wouldn't want to shoot yourself in the foot with one of these, you'd take out your own batallion, but you are aiming a

Re: [Beowulf] Re: "hobbyists"

On Thursday 19 June 2008 10:11:18 am you wrote: > > To add some more OT stuff to this thread, I don't think a nuclear > > weapon has ever been used (or even considered being used) to kill > > troops on a battlefield. > > look up "tactical nukes". These were the USA's only hope of > defending Europ

Re: [Beowulf] Re: "hobbyists"

On Thursday 19 June 2008 10:19:28 am you wrote: > This makes a number of fundamental presumptions, which may not be > true in all cases. > > First and foremost, it assumes that the potential recipient of the > attack or response to attack is a rational actor. That's a very valid point. It's all

Re: [Beowulf] Re: "hobbyists"

Mike Davis wrote: To continue to be OT. Look up the Davey Crockett. http://en.wikipedia.org/wiki/Davy_Crockett_(nuclear_device) It is a weapon meant exclusively for battlefield use. It is also almost a suicide weapon. and a live video at http://www.sonicbomb.com/modules.php?name=Content

Re: [Beowulf] Re: "hobbyists"

To continue to be OT. Look up the Davey Crockett. http://en.wikipedia.org/wiki/Davy_Crockett_(nuclear_device) It is a weapon meant exclusively for battlefield use. It is also almost a suicide weapon. Kilian CAVALOTTI wrote: On Thursday 19 June 2008 06:58:44 am Robert G. Brown wrote:

Re: [Beowulf] Re: "hobbyists"

Again, this is not a cryptography list, but I'll correct a few small things... "Robert G. Brown" <[EMAIL PROTECTED]> writes: > I haven't looked at the literature recently, but to the best of my > knowledge e.g the integer factorization problem cannot be solved in > polynomial time for any known a

Re: [Beowulf] Re: "hobbyists"

Actually, nuclear weapons have indeed been considered for killing troops on the battlefield. At one time, the possibility of the Soviet Union invading western Europe seemed not so remote. Here is a link (wiki) to basically a bazooka launched fission bomb: http://en.wikipedia.org/wiki/Davy_Crockett_

Re: [Beowulf] Re: "hobbyists"

Kilian CAVALOTTI wrote: On Thursday 19 June 2008 06:58:44 am Robert G. Brown wrote: Getting too big or two small an explosion can either kill your own troops or not kill all of the enemy on an actual battlefield. To add some more OT stuff to this thread, I don't think a nuclear weapon has e

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

On Thursday 19 June 2008 12:17:07 am John Hearns wrote: > Actually, I should imagine Kilian is referring to something else, > not the inbuilt timeout which is in the documentation. But I can't > speak for im. I don't know about this timeout. As I said we didn't really had time nor the resources t

Re: [Beowulf] Re: "hobbyists"

Kilian CAVALOTTI wrote: On Thursday 19 June 2008 06:58:44 am Robert G. Brown wrote: Getting too big or two small an explosion can either kill your own troops or not kill all of the enemy on an actual battlefield. To add some more OT stuff to this thread, I don't think a nuclear weapon has eve

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

I dug up this pdf from Nvidia: http://www.nvidia.com/docs/IO/43395/tesla_product_overview_dec.pdf Since I can't imagine coding a graphics card while it serves my X :-) I supposed one might put the PCIE card in a box with a cheap SVGA for the least-cost CUDA experiment (one GPU, 128 "thread process

Re: [Beowulf] Re: "hobbyists"

On Thursday 19 June 2008 06:58:44 am Robert G. Brown wrote: > Getting too big > or two small an explosion can either kill your own troops or not kill > all of the enemy on an actual battlefield. To add some more OT stuff to this thread, I don't think a nuclear weapon has ever been used (or even c

Re: [Beowulf] Re: "hobbyists"

On Thu, 19 Jun 2008, Vincent Diepeveen wrote: USA and allowing encryption beyond the cracking capabilities of a 1st year computer science student... ...hmmm Dear Vincent, IIRC almost any of the high-end encryption routines available within linux are effectively uncrackable, certainly uncracka

Re: [Beowulf] Re: "hobbyists"

On Wed, 18 Jun 2008, Jim Lux wrote: So.. if your (foreign person) buddy is designing thermonuclear devices in their garage, and they complain about how slow it is to run the hydrocodes to simulate stuff, better not hand them that old copy of Sterling, et al., or even worse, give them rgb's web

Re: [Beowulf] SuperMicro and lm_sensors

On Thu, Jun 19, 2008 at 08:24:38AM +0100, John Hearns wrote: > On Wed, 2008-06-18 at 15:11 -0700, Greg Lindahl wrote: > > Speaking of lm_sensors, does anyone have configs for recent SuperMicro > > mobos? My SuperMicro support contact doesn't have ay idea, and running > > sensors-detect leaves me wi

Re: [Beowulf] SuperMicro and lm_sensors

On Wed, Jun 18, 2008 at 06:14:20PM -0700, Greg Lindahl wrote: > On Wed, Jun 18, 2008 at 03:11:54PM -0700, Greg Lindahl wrote: > > > Speaking of lm_sensors, does anyone have configs for recent SuperMicro > > mobos? My SuperMicro support contact doesn't have ay idea, and running > > sensors-detect l

Re: [Beowulf] SuperMicro and lm_sensors

On Wed, 2008-06-18 at 15:11 -0700, Greg Lindahl wrote: > Speaking of lm_sensors, does anyone have configs for recent SuperMicro > mobos? My SuperMicro support contact doesn't have ay idea, and running > sensors-detect leaves me with lots of readings which are Can't help you on the lm_sensors front

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

On Wed, 2008-06-18 at 16:31 -0700, Jon Forrest wrote: > Kilian CAVALOTTI wrote: > I'm glad you mentioned this. I've read through much of the information > on their web site and I still don't understand the usage model for > CUDA. By that I mean, on a desktop machine, are you supposed to have > 2 g