Communicators and Groups

Christopher Cameron, Brandon Barker, Steve Lantz (original)
Cornell Center for Advanced Computing

Revisions: 5/2022, 10/2014, 5/2011 (original)

This topic discusses communicators and how process groups help organize message passing.

Objectives

After you complete this topic, you should be able to:

  • Describe the communicator's contents
  • Explain how communicators help prevent message-passing mixups
  • Demonstrate defining a process group
  • Explain the importance of ranking in defining process groups
  • Explain how to split and subdivide communicators
  • Describe the appropriate use of intra-communicators
Prerequisites
 
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