[Boost.MPI] How to use with processes on different machines?
Hi, I would like to know, how i can use Boost.MPI for IPC between different PCs. It is described in the introduction: "Unlike communication in threaded environments or using a shared-memory library, Boost.MPI processes can be spread across many different machines, possibly with different operating systems and underlying architectures." Is there an example, how its done? I cant find one. Or isn't implemented yet? Kind Regards Manuel Jung
Hi Manuel, On Aug 31, 2007, at 9:34 AM, Manuel Jung wrote:
I would like to know, how i can use Boost.MPI for IPC between different PCs. It is described in the introduction: "Unlike communication in threaded environments or using a shared- memory library, Boost.MPI processes can be spread across many different machines, possibly with different operating systems and underlying architectures."
Is there an example, how its done? I cant find one. Or isn't implemented yet?
It's implemented, but how it's done depends on the underlying MPI implementation and your specific configuration. Boost.MPI builds on top of the C MPI interface, for which there are many different implementations. Here are some open-source possibilities: - Open MPI: http://www.open-mpi.org/ - MPICH2: http://www-unix.mcs.anl.gov/mpi/mpich2/ If you already have a cluster that you plan to use, there is probably an MPI available on that cluster. You would have to consult the documentation for that cluster or ask a system administrator how The simplest way to launch MPI jobs on multiple computers is to create a machine file containing the names of all of the computers, one per line. You can then provide that machine file to either "mpiexec" or "mpirun" (again, depending on the MPI implementation you use!) to launch your program, e.g., mpiexec -machinefile myhosts -n 4 ./hello_world The "mpiexec" program launches jobs on multiple machines, the "- machinefile myhosts" tells mpiexec to retrieve the list of machines from the file "myhosts", the "-n 4" tells mpiexec to start 4 different processes, and "./hello_world" is the program to execute on all of those processes. - Doug
Ah okay, now i have a starting point, thanks a lot. Greetings Manuel Jung
Hi Manuel,
On Aug 31, 2007, at 9:34 AM, Manuel Jung wrote:
I would like to know, how i can use Boost.MPI for IPC between different PCs. It is described in the introduction: "Unlike communication in threaded environments or using a shared- memory library, Boost.MPI processes can be spread across many different machines, possibly with different operating systems and underlying architectures."
Is there an example, how its done? I cant find one. Or isn't implemented yet?
It's implemented, but how it's done depends on the underlying MPI implementation and your specific configuration. Boost.MPI builds on top of the C MPI interface, for which there are many different implementations. Here are some open-source possibilities:
- Open MPI: http://www.open-mpi.org/ - MPICH2: http://www-unix.mcs.anl.gov/mpi/mpich2/
If you already have a cluster that you plan to use, there is probably an MPI available on that cluster. You would have to consult the documentation for that cluster or ask a system administrator how
The simplest way to launch MPI jobs on multiple computers is to create a machine file containing the names of all of the computers, one per line. You can then provide that machine file to either "mpiexec" or "mpirun" (again, depending on the MPI implementation you use!) to launch your program, e.g.,
mpiexec -machinefile myhosts -n 4 ./hello_world
The "mpiexec" program launches jobs on multiple machines, the "- machinefile myhosts" tells mpiexec to retrieve the list of machines from the file "myhosts", the "-n 4" tells mpiexec to start 4 different processes, and "./hello_world" is the program to execute on all of those processes.
- Doug _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
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Manuel Jung