mpi4py hangs when trying to send large data

Question

i've recently encountered a problem trying to share large data among several processors using the command 'send' from the mpi4py-library. Even a 1000x3 numpy float array is too large to be sent. Any ideas how to overcome this problem?

thx in advance.

Answer 1

I've found a simple solution. Divide data into small enough chunks...

Answer 2

I encountered this same problem with Isend (not with Send). It appears that the problem was due to the sending process terminating before the receiver had received the data. I fixed this by including a comm.barrier() call at the end of each of the processes.