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Subject: Re: [OMPI users] mpi-io, fortran, going crazy... (ADENDA)
From: Ricardo Reis (rreis_at_[hidden])
Date: 2010-11-17 03:45:54


On Tue, 16 Nov 2010, Gus Correa wrote:

> Ricardo Reis wrote:
>>
>> and sorry to be such a nuisance...
>>
>> but any motive for an MPI-IO "wall" between the 2.0 and 2.1 Gb?
>>
> Salve Ricardo Reis!
>
> Is this "wall" perhaps the 2GB Linux file size limit on 32-bit systems?

No. This is a 64bit machine and if I write the file normaly (like just
using Fortran open/write/close) it works without problem (I just got a
3.5Gb file this way).

If try to use 2 processes it will also spit a 3.5 Gb file (because each
will be writing a chunk smaller than the 2.1 Gb "limit" ?)

I haven't tried to replicate the same program in C, I must admit

best,

  Ricardo Reis

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