[foamF]

Hi, everyone. I am looking for some guidelines to run paraview in parallel using multi cores in my 6-core laptop.

I am using Windows 10 with ubuntu linux as a subsystem, together with Xming as a X server. I installed OpenFOAM v6 in my laptop.

I tried the following steps but failed to run paraview in parallel:

1. in paraview, tick the box "enable auto MPI" and set the Auto MPILimit to 2.

2. in ubuntu terminal, type "mpirun -np 2 pvserver", and it shows "waiting for client... connecting URL ... Accepting connection(s)...."

3. in paraview, add a server (server type: client/server, host: localhost, port 11111, startup type: manual) and connect to the server

4. in ubuntu terminal, it shows "Client connected".

5. in paraview, load openfoam results via opening a file named foam.foam

It appears everything is fine. But, when i click "About" in paraview, it indicates only 1 number of processes.

Anyone knows why??

[alexeym]

Hi,

AFAIR to have parallel visualisation of OpenFOAM(R) case with ParaView, the case should be decomposed (into as many subdomains as the number of cores you plan to use for visualisation).

[foamF]

Thanks, alexeym.

I have tried again but without success.

I successfully run a decomposed case with 6 sub-domains, and i can visualize the results in paraview.

But, when i change to server mode in paraview using the steps in my previous post (except the first step i set the MPILimit to 6 and the second step i type "mpirun -np 6 pvserver".

Again, the "About" in paraview indicates only 1 number of processes.

Any expert can give some advice?

[alexeym]

Hi,

Guess, there is a need for more context. Tested right now the following steps with ParaView 5.6.0 from paraview.org:
1. Started pvserver with this command:

mpiexec -np 4 pvserver --mpi

2. Stared paraview.
3. Connected to the server.

About -> Connection Information -> Number of Processes shows 4.

Though, I have tested it on Linux, maybe on Windows there are additional steps to perform.

[foamF]

i typed your command in the terminal but it fails. It prints out "Got unknown argument: --mpi".

any hints what i can do?

[alexeym]

Well, I think it would be quite reasonable to check if your ParaView version is MPI-capable. What paraview package did you install on Ubuntu?

Unfortunately I was not able to find command line argument to show pvserver capabilities, but my 'pvserver --help' returns the following (this time on macOS but Linux version returns the same):

$ /Applications/ParaView-5.6.0.app/Contents/bin/pvserver --help
...
  --mpi  Initialize MPI on processes, if possible. Cannot be used with --no-mpi.
...
  --no-mpi  Don't initialize MPI on processes. Cannot be used with --mpi.
...