Re: [BProc] Beowulf with dual boxes policy

[J . A . M. <jam...@ab...>]

On 20011022 Erik Arjan Hendriks wrote:
>On Mon, Oct 22, 2001 at 01:47:28AM +0200, J . A . Magallon wrote:
>> Hi.
>> 
>> I am now in the process of building a beowulf system with dual SMP boxes.
>> System is made with a front end and five dual boxes.
>> 
>> And the question is...I see two policies to follow:
>> - Run one bpslave on each node, so system looks lie a 5-cpu one, and you could
>>   run two jobs in parallel with no overhead
>
>I strongly recommend this arrangement.  Running a second slave daemon
>is just added overhead.  Plus, having separate slaves makes it more
>difficult for things like MPI to know that they can take advantage of
>shared memory, etc.
>

And how do I make bproc (or MPI) know there are two processors on the box 
(ie, two possible slave processes of the same master could run there) ?
Suppose I add one other box with just 1 cpu...I should have 11 slaves.
I know that part of the question is MPI or PVM specific (I remember somthing
like weights in PVM, do not know about MPI). But can this be done
at the bproc level ?

-- 
J.A. Magallon                           #  Let the source be with you...        
mailto:jam...@ab...
Mandrake Linux release 8.2 (Cooker) for i586
Linux werewolf 2.4.12-ac3-beo #4 SMP Thu Oct 18 21:52:06 CEST 2001 i686