Currently, ompi create a file in the temporary directory and then mmap it. an obvious requirement is the temporary directory must have enough free space for that file. (this might be an issue on some disk less nodes)
a simple alternative could be to try /tmp, and if there is not enough space, try /dev/shm (unless the tmpdir has been set explicitly) any thought ? Gilles btw, we already use the force, thanks to the ob1 pml and the yoda spml On Friday, November 20, 2015, Dave Love <d.l...@liverpool.ac.uk> wrote: > Jeff Hammond <jeff.scie...@gmail.com <javascript:;>> writes: > > >> Doesn't mpich have the option to use sysv memory? You may want to try > that > >> > >> > > MPICH? Look, I may have earned my way onto Santa's naughty list more > than > > a few times, but at least I have the decency not to post MPICH questions > to > > the Open-MPI list ;-) > > > > If there is a way to tell Open-MPI to use shm_open without filesystem > > backing (if that is even possible) at configure time, I'd love to do > that. > > I'm not sure I understand what's required, but is this what you're after? > > $ ompi_info --param shmem all -l 9|grep priority > MCA shmem: parameter "shmem_mmap_priority" (current > value: "50", data source: default, level: 3 user/all, type: int) > MCA shmem: parameter "shmem_posix_priority" (current > value: "40", data source: default, level: 3 user/all, type: int) > MCA shmem: parameter "shmem_sysv_priority" (current > value: "30", data source: default, level: 3 user/all, type: int) > > >> In the spirit OMPI - may the force be with you. > >> > >> > > All I will say here is that Open-MPI has a Vader BTL :-) > > Whatever that might mean. > _______________________________________________ > users mailing list > us...@open-mpi.org <javascript:;> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/11/28084.php >
