[Beowulf] Intro question

Vincent Diepeveen diep at xs4all.nl
Thu Dec 4 12:58:34 EST 2008


On Dec 3, 2008, at 8:25 AM, malcolm croucher wrote:

> Its gonna be used for computational chemisty , not academic but  
> more private / entrepreneurship. I been doing a lot of research in  
> this area for a while and was hoping to do some more on my own.
>

That's most interesting, if i google for your name i just get hits in  
the financial world. How's that possible?

Vincent

> On Wed, Dec 3, 2008 at 2:11 AM, Robert G. Brown <rgb at phy.duke.edu>  
> wrote:
> On Tue, 2 Dec 2008, Lombard, David N wrote:
>
> An acoustic concern. A 1U is quite a bit louder than the normal  
> desktop as
> (1) they use itty-bitty fans and (b) there's no incentive to make them
> quiet, as nobody is expected to have to put up with their screaming...
>
> A good point.  I actually like Greg's suggestion best -- consider
> (fewer) 2U nodes instead -- quieter, more robust, cooler.  Perhaps  
> four,
> but that strongly depends on the kind of thing you are trying to do --
> tell us what it is if you can do so without having to kill and  
> we'll try
> to help you estimate your communications issues and likely  
> bottlenecks.
> For some tasks you are best off getting as few actual boxes as  
> possible
> with as many as possible CPU cores per box.  For others, having more
> boxes and fewer cores per box will be right.
>
> The reason I like four nodes with at least a couple of cores each is
> that if you don't KNOW what you are likely to need, you can find out
> (probably) with this many nodes and then "fix" your design if/when you
> scale up into production.  Otherwise you buy eight single core node  
> (if
> they still make single cores:-) and then learn that you would have  
> been
> much better off buying a single eight core node.  Or vice versa.
>
>   rgb
>
>
> -- 
> David N. Lombard, Intel, Irvine, CA
> I do not speak for Intel Corporation; all comments are strictly my  
> own.
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>
> Robert G. Brown                            Phone(cell): 1-919-280-8443
> Duke University Physics Dept, Box 90305
>
> Durham, N.C. 27708-0305
> Web: http://www.phy.duke.edu/~rgb
> Book of Lilith Website: http://www.phy.duke.edu/~rgb/Lilith/Lilith.php
> Lulu Bookstore: http://stores.lulu.com/store.php?fAcctID=877977
>
>
>
> -- 
> Malcolm A.B Croucher
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