[mpich-discuss] MPICH under torque - adding new nodes

[Suraj Prabhakaran]

Hi Pavan,

Thanks for your response. For the hosts that are not a part of the original PBS job, will mpich try to spawn jobs there through torque/pbs or will the spawn happen through ssh?

Best,
Suraj

On Feb 21, 2014, at 1:33 AM, Balaji, Pavan wrote:

> 
> I thought I responded to this email (it’s in my sent folder), but it never
> showed up on the mailing list.  Here it is again:
> 
> Hello,
> 
> Yes, you can use the info argument “hosts” to specify nodes that are not a
> part of the original PBS job.
> 
>  — Pavan
> 
> 
> On 2/20/14, 4:36 PM, "Suraj Prabhakaran" <suraj.prabhakaran at gmail.com>
> wrote:
> 
>> Hi,
>> 
>> Thats an extension we have made. We hope to release it soon!
>> 
>> Best,
>> Suraj
>> 
>> 
>> On Feb 20, 2014, at 10:42 PM, Reuti wrote:
>> 
>>> Hi,
>>> 
>>> Am 20.02.2014 um 18:10 schrieb Suraj Prabhakaran:
>>> 
>>>> I want use MPICH under the Torque RMS. I can see that mpiexec will
>>>> automatically take the nodefile from $PBS_NODEFILE.
>>>> I am working on dynamically adding nodes to an existing job in torque.
>>>> So there might be a point where the job actually has more number of
>>>> nodes than what was listed in $PBS_NODEFILE.
>>> 
>>> How do you tell Torque that it should increase the number of granted
>>> slots/nodes for a particular already running job?
>>> 
>>> -- Reuti
>>> 
>>> 
>>>> Is it possible to do an MPI_Comm_spawn on these new nodes (which is
>>>> not listed in PBS_NODEFILE but is actually a part of job)? For example
>>>> using some info argument such as add-host or something? Or if it
>>>> entails that the PBS_NODEFILE must be changed with the newly added
>>>> nodes, I can do that too.
>>>> But the basic question is, can MPICH spawn processes on these newly
>>>> allocated nodes for the same job through some mechanism?
>>>> 
>>>> Best,
>>>> Suraj
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