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From: Tim Prins (tprins_at_[hidden])
Date: 2006-11-21 20:10:10


I don't know if there is a way to do it in configure, but after installing you
can go into the $prefix/lib/openmpi directory and delete mca_btl_tcp.*

This will remove the tcp component and thus users will not be able to use it.
Note that you must NOT delete the mca_oob_tcp.* files, as these are used for
our internal administrative messaging and we currently require it to be


Tim Prins

On Tuesday 21 November 2006 07:49 pm, Adam Moody wrote:
> Hello,
> We have some clusters which consist of a large pool of 8-way nodes
> connected via ethernet. On these particular machines, we'd like our
> users to be able to run 8-way MPI jobs on node, but we *don't* want them
> to run MPI jobs across nodes via the ethernet. Thus, I'd like to
> configure and build OpenMPI to provide shared memory support (or TCP
> loopback) but disable general TCP support.
> I realize that you can run without tcp via something like "mpirun --mca
> btl ^tcp", but this is up to the user's discretion. I need a way to
> disable it systematically. Is there a way to configure it out at build
> time or is there some runtime configuration file I can modify to turn it
> off? Also, when we configure "--without-tcp", the configure script
> doesn't complain, but TCP support is added anyway.
> Thanks,
> -Adam Moody
> MPI Support @ LLNL
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