[Users] Help with GW150914 Black Hole simulation

[Zach Etienne]

Hi Enzo,

As the website warns: "Note that the simulation requires about 82 GB of
RAM, *so most likely you will need to use a cluster.*" As for the error,
MPI is probably seeing only one node (your laptop) so requesting 16 is
throwing an error.

-Zach

*     *     *
Zachariah Etienne
Assoc. Prof. of Physics, U. of Idaho
Adjunct Assoc. Prof. of Physics & Astronomy, West Virginia U.
https://etienneresearch.com
https://blackholesathome.net


On Mon, Oct 9, 2023 at 7:18 AM Enzo Iubini <egic.enzo at gmail.com> wrote:

> Greetings to all.
>
> I've been having some problems running the GW150914 simulation. When
> following the tutorial on "
> https://einsteintoolkit.org/gallery/bbh/cr.html " , I run into problems
> when running the parfile, specifically when running
>
> simfactory/bin/sim create-submit GW150914_28 --define N 28 --parfile par/GW150914/GW150914.rpar --procs 128 --walltime 24:00:00
>
>
> This leads to the error
>
> Parameter file: /home/enzo/Cactus/par/GW150914/GW150914.rpar
> Skeleton Created
> Job directory: "/home/enzo/simulations/GW150914_28"
> Executable: "/home/enzo/Cactus/exe/cactus_sim"
> Option list: "/home/enzo/simulations/GW150914_28/SIMFACTORY/cfg/OptionList"
> Submit script: "/home/enzo/simulations/GW150914_28/SIMFACTORY/run/SubmitScript"
> Run script: "/home/enzo/simulations/GW150914_28/SIMFACTORY/run/RunScript"
> Parameter file: "/home/enzo/simulations/GW150914_28/SIMFACTORY/par/GW150914.rpar"
> Assigned restart id: 0
>
> Error: Too many nodes specified: nodes=16 (maxnodes is 1)
> Aborting Simfactory.
>
>
> I am inclined to believe this is because I am running it on my own laptop,
> but I would nonetheless like to know exactly what does that error mean and
> if I can fix it somehow.
>
> I would really appreciate your help, thank you :)
>
> Best regards,
> Enzo
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