I can get MPICH working without it, however I am doing some NFS testing and having that file mounted over NFS would be a very interesting use case for me. I would like to avoid mounting /tmp over NFS so i wanted to see if there was a way to specifying another path for the file.

thanks very much,

-Dustin

On Mon, Feb 4, 2013 at 11:54 AM, Jim Dinan <dinan@mcs.anl.gov> wrote:

Hi Dustin,

AFAICT, we don't provide a way to change the filename, apart from editing src/util/wrappers/mpiu_shm_wrappers.h:590. Is this something that you need to get MPICH working on your system? Would an environment variable work, or do you need to set this up at compile time?

Cheers,
~Jim.

On 2/4/13 9:52 AM, Dustin Sorge wrote:

Hello everyone,
I was wondering if it is possible to have the shared memory mmap'ed
file be in a different location other than /dev/shm or /tmp. Is there
an environment variable I can specify?

I am using MPICH2 and have configured it like this:

./configure --prefix=/opt/mpich2 --with-device=ch3:nemesis
--with-shared-memory=mmap --enable-nemesis-shm-collectives

Is this configuration sufficient for MPICH2 to use the shared memory file?

thanks very much,
-Dustin

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