<PREV> <INDEX> <NEXT>

MPI Introduction

• Network of daemons (mpd) + shell tools (mpi*)
  
  • communicate via sockets (TCP, UDP) or shared memory
  • start/stop/manage processes
  • manage communications and collective behavior
• MPI library:
  handles the grouping and communication of processes
• Extension library: test, development, debugging

Group: static, ranks

Communicator = data structure containing communication info

Intracommunicator Intercommunicator default communicators:
	MPI_COMM_WORLD MPI_COMM_SELF MPI_COMM_PARENT

Message passing :

• is based on groups: context, tag, ranks
• point-to-point, collective