[Beowulf] Slection from processor choices; Requesting Giudence

Thomas H Dr Pierce TPierce at rohmhaas.com
Thu Jun 15 12:41:37 EDT 2006


Dear Amjad Ali,

Here is the MRTG  I/O of a CFD code running on a parallel MPI beowulf 
cluster node with Gigabit ethernet,  It ended at about 3 o'clock.
A lot of I/O chatter. This is the same on all 4 parallel nodes that were 
running the CFD code. (4 nodes *5Mbs per node  = ~20Mbs bandwidth ignoring
wait times, I am still learning how to measure the latency and wait times 
while a job runs.).



Ganglia Memory usage is 2Gb per node and  2 processors per node. 



Looks like you could get by with 1GB of memory. 

------
Sincerely,

   Tom Pierce
 



"amjad ali" <amjad11 at gmail.com> 
Sent by: beowulf-bounces at beowulf.org
06/15/2006 04:02 AM

To
beowulf at beowulf.org
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Subject
[Beowulf] Slection from processor choices; Requesting Giudence






Hi ALL
We are going to build a true Beowulf cluster for Numerical Simulation of 
Computational Fluid Dynamics (CFD) models at our university. My question 
is that what is the best choice for us out of the following choices about 
processors for a given fixed/specific amount/budget:
1.      One processor at each of the compute nodes
2.      Two processors (on one mother board) at each of the compute nodes
3.      Two Processors (each one dual-core processor) (total 4 cores on 
the board) at each compute nodes.
4.      four processor (on one mother board) at each of the compute nodes.

Initially, we are deciding to use Gigabit ehternet switch and 1GB of RAM 
at each node. 
Please guide me that how much parallel programming will differ for the 
above four choices of processing nodes.
with best regards:
Amjad Ali._______________________________________________
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