Hello John,
Yes, in fact, I'm comparing Docker with Singularity regarding the
execution of MPI applications :-)
I'd like to make the comparison fairer by allowing Docker containers to
share memory.
Thanks
On 24/03/2017 10:00, John Hearns via users wrote:
Jordi,
this is not an answer to your question. However have you looked at
Singularity:
http://singularity.lbl.gov/
On 24 March 2017 at 08:54, Jordi Guitart <jordi.guit...@bsc.es
<mailto:jordi.guit...@bsc.es>> wrote:
Hello,
Docker allows several containers running in the same host to share
the same IPC namespace, thus they can share memory (see example
here:
https://github.com/docker/docker/pull/8211#issuecomment-56873448
<https://github.com/docker/docker/pull/8211#issuecomment-56873448>).
I assume this could be used by OpenMPI to communicate MPI
processes running in different Docker containers in the same host
by using shared memory (sm or vader). However, I cannot make it
work. I tried to force mpirun to use shared memory (--mca btl
self, sm) but it complains that MPI processes running in other
Docker containers are not reachable. It seems like OpenMPI cannot
recognize that shared memory is available between containers. Has
anybody any hint about how this could be worked out?
Thanks
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