[wrfems] Running slower on cluster vs single workstation
daniel.leins at noaa.gov
Thu Feb 9 16:30:52 MST 2012
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.
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?
> (See attached file: singleWorkstation_benchmark.info)(See attached file:
> Brian Kolts
> Advanced Scientist
> Environmental Energy Delivery Services
> FirstEnergy Corp.
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