Re: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Jim Lux
At 06:07 AM 12/6/2006, Richard Walsh wrote: Jim Lux wrote: At 03:45 PM 12/5/2006, Richard Walsh wrote: Greg Lindahl wrote: On Tue, Dec 05, 2006 at 12:11:07PM -0600, Richard Walsh wrote: One of the key innovations on the Cray X1 is that the circuits are "on the ceiling" so to speak and sprayed

[Beowulf] LSF and Fluent in a beowulf environment

2006-12-06 Thread Andrew D. Fant
If I may interrupt for a minute with an application-oriented question... If there is anyone out there who is running Fluent (CFD) in parallel on a shared-access Linux cluster who would be willing to answer a couple questions for me in email, I would really appreciate hearing from you. Part of th

Re: [Beowulf] A suitable motherboard for newbie

2006-12-06 Thread Bill Broadley
For such a low density application, you might consider dual core Athlon X2 cpus. Couple these with an entry level enthusiast motherboard (possibly an MSI k9nu?), ECC ram, and possibly a high performance GigE nic depending on what's on the motherboard. Intel and Broadcom based nics are nice because

Re: [Beowulf] A suitable motherboard for newbie

2006-12-06 Thread Geoff Jacobs
Krugger wrote: > I would like to contribute that going quad core is a really bad idea > at the moment, as linux support for the new boards is not very good at > the moment. Even some Core Duo 2 ready boards have trouble, either it > is the SATA controller or some other new stuff that they put in i

Re: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Richard Walsh
Jim Lux wrote: At 04:20 AM 12/6/2006, Daniel Kidger wrote: I am at a UK HPC Conference today (so is Greg L for that matter) One of the speakers said he was evaluating Spraycool to retrofit to his existing cluster. So if these guys spray *downwards* on the chip - what is the risk of a blocked

RE: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Robert G. Brown
On Wed, 6 Dec 2006, Ashley Pittman wrote: On Wed, 2006-12-06 at 12:20 +, Daniel Kidger wrote: Slide 18 implies there early market is for Defence systems - I guess getting rid of hot air on a submarine is a bit tricky? I shouldn't imagine it's to tricky although it probably depends on wher

RE: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Jim Lux
At 04:20 AM 12/6/2006, Daniel Kidger wrote: In spite of many of the slides saying "ISR Propiatory and Confidential" Hah.. they've published it on the web, so it's not proprietary and confidential any more. Furthermore, if they really want trade secret protection, they've got to be a bit more

Re: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Richard Walsh
Jim Lux wrote: At 03:45 PM 12/5/2006, Richard Walsh wrote: Greg Lindahl wrote: On Tue, Dec 05, 2006 at 12:11:07PM -0600, Richard Walsh wrote: One of the key innovations on the Cray X1 is that the circuits are "on the ceiling" so to speak and sprayed from below. The fluid is gravity collected

Re: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Greg Lindahl
On Wed, Dec 06, 2006 at 12:20:35PM -, Daniel Kidger wrote: > So if these guys spray *downwards* on the chip - what is the risk of a blocked > tube causing the Flurinert to catch fire? They don't use the same Flurinert that does nasty things when it catches on fire. -- greg

RE: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Ashley Pittman
On Wed, 2006-12-06 at 12:20 +, Daniel Kidger wrote: > Slide 18 implies there early market is for Defence systems - I guess getting > rid of hot air on a submarine is a bit tricky? I shouldn't imagine it's to tricky although it probably depends on where you park it, I can't imagine hot liquid w

Re: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Joe Landman
Daniel Kidger wrote: Slide 18 implies there early market is for Defence systems - I guess getting rid of hot air on a submarine is a bit tricky? Hmmm... I would suggest that the important aspect is the lower noise level associated with heat removal on a sub. A bunch of 40mm fans whining a

Re: [Beowulf] SATA II

2006-12-06 Thread Peter Kjellstrom
On Wednesday 06 December 2006 07:11, Ruhollah Moussavi Baygi wrote: > Thanks Peter, > But do you mean that SATA is not a suitable choice for a beowulf cluster? huh? Both me and Mark relied almost identically. Pointing out that the controller (motherboard SATA or add-on raid-controller) is what yo

RE: [Beowulf] 'liquid cooled' racks

2006-12-06 Thread Daniel Kidger
In spite of many of the slides saying "ISR Propiatory and Confidential" I did find this presentation on the web: http://www.vita.com/cool/pres-2004/1430-tilton.pdf see slide 11 for a photo of what they are doing. Slide 18 implies there early market is for Defence systems - I guess getting rid o