How to Create MultiFabs Only in the Root Process When Running a Program with Multiple CPUs?

[ztdepztdep]

I am planning to run my program with 8 CPUs, and I need to create MultiFabs only in the root process. Could you please help me with this?

[WeiqunZhang]

BoxArray ba(......);
int nprocs = ParallelDescriptor::NProcs();
int root = 0;
DistributionMapping dm(Vector<int>(nprocs,root));
MultiFab mf(ba, dm, ......);

Note that if MPI communication is not needed, FArrayBox might also serve the purpose.

[asalmgren]

Closing this issue due to lack of activity. Please re-open it if you feel there is is still an issue!