MPI Failure at line 839 of nonblocking.c (MPI_File_write_all : MPI_ERR_IO: input/output error)

[Rob Latham]

On Wed, Aug 08, 2012 at 02:17:19PM -0600, Jim Edwards wrote:
> I am getting this error from parallel-netcdf using openmpi 1.4.5 and intel
> 12.1.4 and a lustre filesystem.   Because this is
> non-blocking I am having a lot of difficulty pinpointing the issue, do you
> have any suggestions?  I buffer multiple variables before
> calling the nfmpi_wait_all and if I turn off this buffering functionality
> it appears to work fine.     All of this functionality works on several
> other systems so I
> think that it must be an issue lower in the software stack.

How much data are you working on in total?   Sometimes this
"MPI_ERR_IO: input/output error" comes from reading or writing more
than 2 GiB of data in a single call.

==rob

-- 
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA