Subject:
Re: [OMPI users] a question about [MPI]IO on systems without network
filesystem
Sent by:
users-boun...@open-mpi.org
On Thu, Sep 30, 2010 at 09:00:31AM -0400, Richard Treumann wrote:
> It is possible for MPI-IO to be implemented in a way that lets a single
> process or the set
On Thu, Sep 30, 2010 at 09:00:31AM -0400, Richard Treumann wrote:
> It is possible for MPI-IO to be implemented in a way that lets a single
> process or the set of process on a node act as the disk i/O agents for the
> entire job but someone else will need to tell you if OpenMPI can do this,
> I
Open MPI Users
List-Post: users@lists.open-mpi.org
Date:
09/29/2010 09:50 PM
Subject:
Re: [OMPI users] a question about [MPI]IO on systemswithout network
filesystem
Sent by:
users-boun...@open-mpi.org
Hi Paul
I think you should clarify whether you mean you want you application to
send all
Hi Paul
I think you should clarify whether you mean you want you application to
send all it's data back to a particular rank, which then does all IO (in
which case the answer is any MPI implementation can do this... it's a
matter of how you code the app), or if you want the application to know
not
Hi Paul
> Is it possible to configure/run OpenMPI in a such way, that only _one_
> process (e.g. master) performs real disk I/O, and other processes sends the
> data to the master which works as an agent?
It is possible to run OpenMPI this way, but it is not a matter of configuration,
but of impl
Dear OpenMPI developer,
We have a question about the possibility to use MPI IO (and possible
regular I/O) on clusters which does *not* have a common filesystem
(network filesystem) on all nodes.
A common filesystem is mainly NOT a hard precondition to use OpenMPI:
http://www.open-mpi.org/faq/
