Dear Mike,
Thank you for your response. I use this program
http://reduze.hepforge.org/
I did not rite its code myself.Did I understand you right?
You mean I have to use the new version of OMPI namely:
OMPI 1.7
because the version which I use is: mpirun (Open MPI) 1.5.5
What is IB ?
thank you in advanced
Cheers,
Mohammad
Message: 5
Date: Wed, 17 Jul 2013 16:15:41 +0300
From: Mike Dubman <mi...@dev.mellanox.co.il>
Subject: Re: [OMPI users] max. message size
To: Open MPI Users <us...@open-mpi.org>
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<CAAO1KyakymR7wqOMwW31ntZrbYShMzkhh9Wvm7yy1Swofmh=1...@mail.gmail.com>
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do you use IB as a transport? max message size in IB/RDMA is limited to
2G, but OMPI 1.7 splits large buffers during RDMA into 2G chunks.
On Wed, Jul 17, 2013 at 11:51 AM, mohammad assadsolimani <
m.assadsolim...@jesus.ch> wrote:
Dear all,
I do my PhD in physics and use a program, which uses openmpi for
a sophisticated calculation.
But there is a Problem with "max. message size ". That is limited to ~2GB.
Someone suggested that I have to use chunks i.e. I have to disassemble
the massages
in smaller massages. That might be nice, but I do not know how?
I often was searching the last time in internet however I did not get an
example.
Is there any other possibility to increase this volume without
manipulation of
the code?
The version of my ompi: mpirun (Open MPI) 1.5.5
I am very grateful for all of your help and thank you in advanced
Mohammad
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