MPI difference between Communicator and Group

Posted by iamrohitbanga on Stack Overflow See other posts from Stack Overflow or by iamrohitbanga
Published on 2010-04-15T04:58:25Z Indexed on 2010/04/15 5:03 UTC
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mpi

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group

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communicator

I have read the definitions of these terms and my interpretation is that there is a one to one relation between a group and a communicator. A group is a set of processes which wish to communicate with each other and a communicator is an implementation for a group. Is this correct?

Why have two different terms if this is so?

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