How to restart a simulation in MPI mode
I have done a simulation in MPI mode with AVL Fire 2011. now I want to restart the simulation from a specific time step. but like single mode, just one processor runs the simulation. how can I fix it?
If I understood correctly, you already calculated using MPI mode.
And then, you want to restart from a specific time step using single(serial) mode.
Basically, there is no special way.
I hope you are familiar to use the shell.
the command is
cfdwm_solver -solver_vers=v2011 -case=Case -restart=Case.rs0
You have to know which restart file(CaseName.rs0 or CaseName.rs1) or backup file(CaseName.bc_00####) is for the specific time.
Please see the fla file.
If you have some problems to restart, please describe more detail.
- error message
- your application(moving mesh? combustion? aftertreatment? porosity?...)
thanks for response kimmhw
I already calculated my simulation using MPI mode and I want to restart it using MPI again. but after choosing MPI mode and 8 number of processors, just one processor is working and the rest of processors work with 0 % CPU as shown in task manager.
I do not know how to use all processors for restarting.
Frankly, it is not easy to understand your problem exactly without your model/log message.
But please try to do as below.
1) if you start the calculation using GUI
there is one advanced option in job setup menu.
Advanced Setting - check "disable file locking "
2) if you start the calculation on shell
Add one argument (-no_file_locking).
cfdwm_solver -solver_version=v2011 -case=CaseName -mpi -cpu=8 -restart=CaseName.rs0 -no_file_locking
"disable file locking" was helpful.
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