[mpich2-dev] hydra: redirecting stdout/err

[Pavan Balaji]

Ah, I see. Unfortunately, there's no easy way to do this right now. What 
you did below should work, but it might be better to add such a feature 
in Hydra itself.

Can you create a ticket for this? 
https://trac.mcs.anl.gov/projects/mpich2/newticket

  -- Pavan

On 10/29/2010 01:58 PM, Peter Johnson wrote:
> Hi Pavan, thanks for replying.
>
> I'm actually looking for a way to separately redirect the output of each
> process forked by mpiexec.  I found the solution, though:
>
>      $ mpiexec sh -c '/path/to/binary>$PMI_RANK.out 2>$PMI_rank.err'
>
> pete
>
> On Fri, Oct 29, 2010 at 12:59:35AM -0500, Pavan Balaji wrote:
>>
>> Are you trying to send stdout to a separate file from stderr? You
>> can do that using:
>>
>> % mpiexec -f hosts -n 4 ./foo>  out 2>  err
>>
>>   -- Pavan
>>
>> On 10/28/2010 04:10 PM, Peter Johnson wrote:
>>> Hi --
>>>
>>> I'd find it really useful to be able to separately redirect stdout and stderr
>>> for each process spawned by Hydra.  The wiki claims this is possible [1], and
>>> it appears support therefor was been committed to a developer branch a couple
>>> years ago [2], but the code doesn't seem to have made it to the 1.3 trunk.
>>> Any ideas why it's missing?  Google couldn't find for me any discussion on the
>>> topic.  Thanks.
>>>
>>> pete
>>>
>>>
>>> [1] http://wiki.mcs.anl.gov/mpich2/index.php/Hydra_Output_Redirection
>>>
>>> [2] http://trac.mcs.anl.gov/projects/mpich2/changeset/4785
>>>
>>
>> --
>> Pavan Balaji
>> http://www.mcs.anl.gov/~balaji

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji