Re: [FLASH-USERS] A Cluster dedicated for FLASH?

Hubert,

The Flash code has been run sucessfully on large linux clusters using
quadrics based interconnects. These systems are typically dual xeon
machines (~2.8 ghz or so) with 4GB of memory. If you are really wanting
to run large problems and are getting 64-bit systems, I would suggest
4GB per processor (8GB total). I'm not sure on what type of interconnect
has the best support under opteron. With 256 processors you would
definitely benifit from a better interconnect. Both quadrics and myrinet
are well supported on x86_64 systems running SUSE linux. I know much
less about infiniband. Hope this helps.

--Brad

Hubert Klahr wrote:

> Dear Colleagues,
>
> we are going to apply for a new linux cluster
> in our department. Now we try to figure out an
> optimized system, as cheep and as powerful
> as possible. So what is in your experience the
> optimum configuration to run FLASH with and
> without self gravity?
>
> We think about a 256 opteron processor cluster. Now the
> questions are:
>
> How much memory per processor do we need?
> What network do we need? Infiniband/Giganet/Myrinet...
>
> In order to get as many as possible processors we have
> to minimize the cost for network, processor-clockspeed,
> and memory per node.
>
> Any opinion?
>
> Best wishes
> Hubert
>
> PS: We will also run ZEUS-MP, the Pencil Code, Gadget and TRA-MP on
> this cluster.
>
> ========================================================================
> ==
> Hubert Klahr Voice: +49 6221 528 255
> Max-Planck-Institut Fax: +49 6221 528 246
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>

-- 
Brad Gallagher
ASCI Flash Center
jbgallag@flash.uchicago.edu