Sorry for a pedantic follow up: Is this (heterogeneous cluster support) something that is specified by the MPI standard (perhaps as an optional component)? Do people know if MPICH. MVAPICH, Intel MPI etc support it? (I do realize this is an OpenMPI forum)
The reason I ask is that I have a mini Linux lab of sort that consists of Linux running on many architectures, both 32 and 64 bit and both LE and BE. Some have advanced fabrics, but all have garden variety Ethernet. I mostly use this for software porting work, but I'd love to set it up as a test bench for testing OpenMPI in a heterogeneous environment and report issues, if that is something that the developers want to achieve. Thanks Durga $man why dump woman? man: too many arguments On Mon, Apr 2, 2018 at 1:19 PM, Jeff Squyres (jsquyres) <jsquy...@cisco.com> wrote: > On Mar 31, 2018, at 10:57 PM, peng jia <jiape123...@gmail.com> wrote: >> >> I would like to run some MPI code with a cluster out of a normal laptop and >> a ARM-architektur raspberrypi, but unsuccessfully the system would not >> response, even though i install openmpi manuelly on both pc and raspberrypi. >> >> mypc@pc:~ $ mpiexec -H pc,raspberrypi001 hello_world >> >> i would like to ask, is it possible to run such a MPI porgram in a so >> heterogeneous cluster? if not possible, why? i am really really confuse >> about it, could you please teach me? > > Heterogeneous support is, at best, not well supported. I would consider it a > topic for an advanced user, and even so, our heterogeneous support inside > Open MPI is probably not well tested these days. I would not recommend > mixing machines with different data sizes and/or representations in a single > job. There are many issues that come up; the easiest to describe is: what > should MPI do when a message sent of type X is sent between two machines > where X is a different size? Should MPI truncate the data? Should it round? > Should it error? ...? There's no good answer. > > My advice: run your job exclusively on your Raspberry Pi's *or* your closer > of laptops, and you should probably be ok. > > -- > Jeff Squyres > jsquy...@cisco.com > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
