[MPICH] Send and Recv Guidance Needed

[Erich Peterson]

Hi all,

                I am trying to come up with the best way to approach this. I
am want to have many processes access a file, each gathering records, using
a specified criteria (which is not important here). I want each process to
send each record (100 bytes long) it matches to process rank 0 as a string.
Lastly, I want rank 0 to place all the records it receives into a vector of
strings (vector<string>).

                I thought of letting each process call MPI_Send() from each
record it matches and have process rank 0 call MPI_Recv, but, process rank 0
won't know how many times to call MPI_Recv to receive all the records.

                

                Thanks,

Erich

 

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