The Java bindings are written on top of the C bindings, so you'll be able to use those networks just fine from Java :-)
On Wed, Apr 16, 2014 at 2:27 PM, Saliya Ekanayake <esal...@gmail.com> wrote: > Thank you Nathan, this is what I was looking for. I'll try to build > OpenMPI 1.8 and get back to this thread if I run into issues. > > Saliya > > > On Wed, Apr 16, 2014 at 5:19 PM, Nathan Hjelm <hje...@lanl.gov> wrote: > >> You do not need CCM to use Open MPI on with Gemini and Aries. Open MPI >> has natively supported both networks since 1.7.0. Please take a look at >> the platform files in contrib/platform/lanl/cray_xe6 for CLE 4.1 >> support. You should be able to just build using: >> >> configure --with-platform=contrib/platform/lanl/cray_xe6/optimized-lustre >> >> If you also enable the Java interfaces you should be up and running with >> Gemini. Keep in mind you can use either mpirun or aprun to launch. You >> will get a warning message from PMI (there is an open bug on this) when >> using mpirun but it is harmless. >> >> If you want more info on the XE, XK, and XC support feel free to ask on >> this list and I will try to get an answer back quickly. >> >> -Nathan Hjelm >> HPC-5, LANL >> >> >> On Wed, Apr 16, 2014 at 05:01:37PM -0400, Ray Sheppard wrote: >> > Hello, >> > Big Red 2 provides its own MPICH based MPI. The only case where >> the >> > provided OpenMPI module becomes relevant is when you create a >> CCMLogin >> > instance in Cluster Compatibility Mode (CCM). For most practical >> uses, >> > those sorts of needs are better addressed on the Quarry or Mason >> > machines. >> > When in CCM, the Gemini network is not directly accessible. The >> > proposed idea is for middleware to present an interface resembling >> an IB >> > interface and use it to create a subset of the Gemini network for >> the CCM >> > virtual cluster. Unfortunately, due to a Cray bug, case 80503, that >> has >> > not yet worked. >> > Ray >> > >> > On 4/16/2014 4:44 PM, Saliya Ekanayake wrote: >> > >> > Hi, >> > We have a Cray XE6/XK7 supercomputer (BigRed II) and I was trying >> to get >> > OpenMPI Java binding working on it. I couldn't find a way to >> utilize its >> > Gemini interconnect, instead was running on TCP, which is >> inefficient. >> > I see some work has been done along these lines in [1] and wonder >> if you >> > could give some suggestions on how to build OpenMPI with Gemini >> support. >> > [1] >> https://www.open-mpi.org/papers/cug-2012/cug_2012_open_mpi_for_cray_xe_xk.pdf >> > Thank you, >> > Saliya >> > -- >> > Saliya Ekanayake esal...@gmail.com >> > http://saliya.org >> > >> > _______________________________________________ >> > users mailing list >> > us...@open-mpi.org >> > http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> > _______________________________________________ >> > users mailing list >> > us...@open-mpi.org >> > http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > > > -- > Saliya Ekanayake esal...@gmail.com > Cell 812-391-4914 Home 812-961-6383 > http://saliya.org > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
