[Beowulf] Begginers question # 1

Jack Carrozzo jack at crepinc.com
Mon Oct 4 13:52:30 EDT 2010


It's all about the interconnects and how your application communicates. If
you want to calculate a problem you can split N ways without each process
having to exchange boundary data, then it doesn't matter the speed of your
interconnects or how many cores are on how many boards. However, most
problems involved exchange of data between processes.

If your app is written to take advantage of multi-core machines, then it
will put processes on the same machine which talk to each other a lot, and
split low-talking processes onto other machines between which the network is
slow (communication between processes on the same machine is of course
fast).

With this in mind, most clusters are task-built - what are you trying to
solve? That will define what hardware you need.

-Jack Carrozzo

On Sat, Sep 25, 2010 at 1:07 PM, gabriel lorenzo <macglobalus at yahoo.com>wrote:

> IN CLUSTER COMPUTING, IS THE AMOUNT OF CORE THAT COUNTS?
> If I build a cluster with 8 motherboards with 1 single core each would it
> be the same as using just one motherboard but with two quad core processors?
> I wanna build one of these but wanna save money and space and if what counts
> is the amount of cores to process info I think fewer motherboards with dual
> six-core processors is definitely cheaper just because I wont be needing
> that many mothers power supplies etc. thanks
>
>
>
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