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 > > ------------------------------**------------------------------**-- > Webmail: http://mail.livenet.ch > Glauben entdecken: http://www.jesus.ch > Christliches Webportal: http://www.livenet.ch > > > > ______________________________**_________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/**mailman/listinfo.cgi/users<http://www.open-mpi.org/mailman/listinfo.cgi/users> >
