MPI_{Gather,Allgather}v are appropriate for this. See docs for details. Jeff
Sent from my iPhone On Nov 9, 2013, at 6:15 PM, Saliya Ekanayake <esal...@gmail.com> wrote: Hi, I want to contact bunch of strings from MPI processes. For example, say with 2 processes, P1 has text "hi" P2 has text "world" I have these stored as char arrays in processes. Is there a simple way to do a reduce operation to concat these? Thank you, Saliya -- Saliya Ekanayake esal...@gmail.com Cell 812-391-4914 Home 812-961-6383 http://saliya.org _______________________________________________ users mailing list us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users