On 10/08/2015 08:18 AM, Jeff Hammond wrote:
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?
Probably not what Wahi has in mind, but back on the old Crays (old vector-era crays, I mean), when checkpoint/restart was an os-level service, the job scheduler used that feature: new job comes in with higher priority, checkpoint the old job. when new job finishes, restart old job. ==rob
On Wed, Oct 7, 2015 at 10:08 PM, wahi <[email protected] <mailto:[email protected]>> 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 <<mailto:[email protected]>[email protected] <mailto:[email protected]>> 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 [[email protected]] Sent: Wednesday, October 07, 2015 2:43 AM To: [email protected] 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 _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss
-- Jeff Hammond [email protected] <mailto:[email protected]> http://jeffhammond.github.io/
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-- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss