Hi MPICH team, I have an application which is mostly using master-slave kind of architecture. One master and <n> number of slaves. The slaves do not communicate between themselves and only sends/receives messages to/from master. I have two ways I can setup the application 1> Static : Master and slaves are all in the same MPI World 2> Dynamic : Each slave is connected to master using a MPI_Comm and the communicator is created using MPI_Comm_connect/MPI_Comm_accept. Essentially master has <n> communicators. The way master works is : it uses MPI_WaitAny kind of method to check messages from slave. Could you please tell me whether <2> can be significantly slow with respect to <1> if all the slaves send lots of small messages? Is there some kind of buffering overhead in <2> for <n> communicators and which can be solved using some configuration. Thanks, Hirak _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss