[mpich-discuss] shared memory mmap file

[Dustin Sorge]

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 at 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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