[Beowulf] 1 multicore machine cluster

Jonathan Aquilina eagles051387 at gmail.com
Wed Apr 22 06:07:51 PDT 2009


doug im using boinc projects on this q9550 quad core. also i just noticed
that the seti at home project is using cuda which seems to be amazingly fast.
takes about 26 min or less to cruch a 105mb dataset. now one issue im
running into is heating issue. running these projects really causing gpu as
well as cpu temps to jump across all 4 cores of the cpu. they are on the
rather hot side for this processor which is a q9550 which should run between
50-70C. i need to go find a better heat sink and get some arctic silver 5.
im running this on vista and im able to still use the pc while these
projects are running. does anyone have an i7 rig running any boinc projects
on  linux or windows?

On Wed, Apr 22, 2009 at 2:31 PM, Douglas Eadline <deadline at eadline.org>wrote:

>
> This is an interesting question. As multi-core become more
> pervasive this will beg the bigger question. What is cluster?
> Recall, there is a design called a "constellation" where the
> number of cores on the nodes is greater than the number of nodes.
> Therefore if you have four 8-core nodes (32 cores total)
> connected with IB, you have a "constellation cluster".
> The "parallelism" may be more in the nodes, than between
> the nodes.
>
> In any case, you have a pile of cores how do you program
> them? Fortunately MPI will work on multi-core and across nodes.
> For the most part, OpenMP and threads only work on single
> motherboards. I investigated this idea (MPI vs OpenMP on
> a single multi-core node) and wrote up my results here:
>
>  http://www.linux-mag.com/id/4608
>
> Of course, there is a need for more testing
> with different compilers and hardware platforms,
> but it is clear, MPI on multi-core SMP is not
> necessarily a bad idea, in some cases it is a good
> idea. There are some who may argue this, but data points
> are really the only thing worth discussing.
>
> I'll have some new hardware in May and I plan on
> re-running the tests mentioned in the article.
>
> --
> Doug
>
> > is it possible to have a single multicored machine as a cluster?
> >
> > --
> > Jonathan Aquilina
> >
> > --
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> --
> Doug
>
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-- 
Jonathan Aquilina
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