[samiam1000]

Dear developers,

I am having problems with the parallel usage of SU2.

Trying to run the OneraM6 tutorial, in parallel, I get this error:

zampini@pc-zampini:~/Documenti/PhD/SU2/TestCases/euler/oneram6$ parallel_computation.py -f inv_ONERAM6.cfg -p 2
--------------------------------------------------------------------------
mpirun was unable to launch the specified application as it could not access
or execute an executable:

Executable: /SU2Py/SU2_DDC
Node: pc-zampini

while attempting to start process rank 0.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun was unable to launch the specified application as it could not access
or execute an executable:

Executable: /SU2Py/SU2_CFD
Node: pc-zampini

while attempting to start process rank 0.
--------------------------------------------------------------------------
sh: /SU2Py/merge_solution.py: not found
zampini@pc-zampini:~/Documenti/PhD/SU2/TestCases/euler/oneram6$

Any idea about how to solve?

Thanks a lot,

Samuele

[fpalacios]

Could you please try to run SU2_DDC? Does it work?

SU2_DDC should generates the different grids that SU2_CFD uses when running in parallel. SU2_DDC is a serial code that requires metis, but you can compile it with MPI and run it with mpirun.


Cheers,
Francisco

[samiam1000]

The command

SU2_DDC turb_ONERAM6.cfg

gives me the following output:

zampini@pc-zampini:~/Documenti/PhD/SU2/TestCases/rans/oneram6$ SU2_DDC turb_ONERAM6.cfg 

-------------------------------------------------------------------------
|                SU2 Suite (Domain Decomposition Code)                  |
-------------------------------------------------------------------------

------------------------ Physical case definition -----------------------
Input mesh file name: mesh_ONERAM6_turb_hexa.su2

-------------------------- Output information ---------------------------
Don't visualize the partitions. 

------------------- Config file boundary information --------------------
Navier-Stokes wall boundary marker(s): WING.
Far-field boundary marker(s): FARFIELD.
Symmetry plane boundary marker(s): SYMMETRY.

---------------------- Read grid file information -----------------------
Three dimensional problem.
43008 interior elements. 46417 points, and 0 ghost points.
3 surface markers.
2560 boundary elements in index 0 (Marker = FARFIELD).
1408 boundary elements in index 1 (Marker = WING).
2688 boundary elements in index 2 (Marker = SYMMETRY).

----------------------- Preprocessing computations ----------------------
Identifying vertices.

--------------------------- Read FFD information ------------------------
There is no FFD box definition. Just in case, review the .su2 file

------------------------- Exit Success (SU2_DDC) ------------------------

zampini@pc-zampini:~/Documenti/PhD/SU2/TestCases/rans/oneram6$

so it seems to work, right? The point is that I can not see any new files in the working directory: what's wrong with it?

Thanks a lot,
Samuele

[shirazbj]

just played with DDC and figured out that you have to change the PARTITIONING STRATEGY setting in the CFG file. By default, it is set to 0 partitions.

% --------------------------- PARTITIONING STRATEGY ---------------------------%
%
% Number of partitions of the domain
NUMBER_PART= 4
%
% Write a tecplot/paraview file for each partition (NO, YES)
VISUALIZE_PART= YES

[fpalacios]

Our recommendation is to use the parallel computation script. If not, as Cean pointed out, you should indicate the number of partitions in the config file.

[praveen]

I think you have not set the SU2_HOME and SU2_RUN variables. The python script is not able to find the executables. Also make sure you are using the latest code since the python scripts have been updated.