Ricardo Reis wrote:
> On Wed, 2 Mar 2011, Gabriele Fatigati wrote:
>> Dear OpenMPI users and developers,
>> i'm using OpenMPI 1.4.3.
>> My question is about MPI_FIle_Real_all routine and files larger than 4
>> Is this routine able to manage this case?
>> Using the routine with 6 GB file the routine fails, retrieving an
>> 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?
> the file size per process must be lower than 4Gb
> There was a discussion a short time ago about this...
> Ricardo Reis
> 'Non Serviam'
> PhD candidate @ Lasef
> Computational Fluid Dynamics, High Performance Computing, Turbulence
> Cultural Instigator @ Rádio Zero
> contacts: gtalk: kyriusan_at_[hidden] skype: kyriusan
This thread may help:
As Ricardo and Massimo pointed out,
the issue may be the 2GB limitation of (MPI) integers.
There is a workaround suggested on one of the thread's messages,
whereby you use MPI types to reduce the count number
in the message buffer.
I hope this helps,