Dealing with stdin, stdout, stderr
No way to know a priori what the I/O capabilities of an MPI implementation
This makes it hard to write portable programs
Especially problematic during the coding and debugging phases of program development
To address these problems we will write an I/O library that will allow programs access to stdin, stderr, and stdout given that the MPI implementation allows at least one process access
Will discuss a few alternatives in case this isn’t true of your system