[mpich-discuss] Can the MPICH job pause and resumed

[Jeff Hammond]

Nodes and cores are *hardware* concepts.  If you need to add hardware
resources to your job, that is a resource manager issue.  If you want to
create new MPI processes _that will run on those new nodes/cores_, you can
use MPI_Comm_spawn for that.

As for pausing a job, I'm not sure why you want to do that.  Are you trying
to suspect the job until the new hardware resources become available?

On Wed, Oct 7, 2015 at 10:08 PM, wahi <wahi at sci.am> wrote:

> Hi Jeff,
>
> Thank you for your reply, I think the MPI_COMM_Spawn is for generating new
> processes but I need to add more node or cores after pausing the job, am I
> right ?
>
>
> On 10/08/2015 08:11 AM, Jeff Hammond wrote:
>
> See MPI_Comm_spawn(_multiple).
>
> Jeff
>
> On Wednesday, October 7, 2015, Zhao, Xin < <xinzhao3 at illinois.edu>
> xinzhao3 at illinois.edu> wrote:
>
>> Hi Wahi,
>>
>> Do you mean you want to change number of hosts during one MPI execution?
>> If so, we think that is not possible.
>>
>> Xin
>> ________________________________________
>> From: wahi [wahi at sci.am]
>> Sent: Wednesday, October 07, 2015 2:43 AM
>> To: discuss at mpich.org
>> Subject: [mpich-discuss] Can the MPICH job pause and resumed
>>
>> Hi,
>>
>> I would like to know if there is possibility to pause the MPICH job and
>> restart it with more node numbers ?
>>
>>
>>
>> Thanks in advance for any help or suggestion.
>>
>>
>>
>>
>>
>> Regards,
>>   Wahi
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>
>
> --
> Jeff Hammond
> jeff.science at gmail.com
> http://jeffhammond.github.io/
>
>
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-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
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