[wrfems] Running slower on cluster vs single workstation

[Daniel Leins]

Brian,

The slower workstation may slow things down a bit, but I would be 
shocked to see THAT much of a degradation. Have you checked to see if 
hyper-threading is enabled on the additional workstation?

My suspicion is that it has to do with network throughput between both 
machines. Are they connected through a gigabit router? A gigabit router 
is essentially a must unless you're modeling a coarse domain.  If they 
are connected via a gigabit connection, there may be a problem with your 
NFS share not being optimized fully.

Dan
WFO PSR

On 2/9/2012 2:04 PM, bkolts at firstenergycorp.com wrote:
> Hi All,
>
> I'm trying to cluster 2 workstations to run WRF.  After setting this up
> I've noticed a significant slow down in run time.  When running the
> benchmark on the master workstation only (no cluster) the benchmark test
> took a little over 4 minutes to complete.  When running with the cluster,
> it took over 18 minutes.
>
> I've attached the results from the two benchmark tests.  The second machine
> in the cluster is a slightly slower machine.  Could it be that this is
> causing the slow down?  Or have I configured things incorrectly?
>
> Thanks,
> Brian
>
> (See attached file: singleWorkstation_benchmark.info)(See attached file:
> cluster_benchmark.info)
>
> Brian Kolts
> Advanced Scientist
> Environmental Energy Delivery Services
> FirstEnergy Corp.
> 330.384.5474
>
>
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