i'm using OpenMPI 1.4.3.

My question is about MPI_FIle_Real_all routine and files larger than 4 GB. Is this routine able to manage this case?

Using the routine with 6 GB file the routine fails, retrieving an allocation error. Investigating more in depth with Totalview, the problem appears in a line 188 of ompi/mca/io/romio/romio/adio/ad_nfs/ad_nfs_read.c:

MPI_Type_size(fd->filetype, &filetype_size);

here there is an explicit cast to int that can causes the problem.

Someone can help me?

Thanks in forward.

--
Ing. Gabriele Fatigati

Parallel programmer

CINECA Systems & Tecnologies Department

Supercomputing Group

Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy

www.cineca.it                    Tel:   +39 051 6171722

g.fatigati [AT] cineca.it