Hello,
Just to add some context here. We plan to use slurm for developing a sched
solution which interacts with a backend system.
Now, the backend system has pieces of h/w which require specific host in the
allocation to be the primary/master host wherein the initial task would be
launched, this in turn is driven by the job's placement orientation on the h/w
itself.
So, our primary task should launch in the asked primary host while secondary /
remote tasks would subsequently get started on other hosts.
Hope this brings some context to the problem as to why a specific host is
necessary to be the starting host.
Regards,Bhaskar.
On Thursday 31 October, 2024 at 12:04:37 am IST, Laura Hild <l...@jlab.org>
wrote:
I think if you tell the list why you care which of the Nodes is BatchHost,
they may be able to provide you with a better solution.
________________________________________
Od: Bhaskar Chakraborty via slurm-users <slurm-users@lists.schedmd.com>
Poslano: sreda, 30. oktober 2024 12:35
Za: slurm-us...@schedmd.com
Zadeva: [slurm-users] Change primary alloc node
Hi,
Is there a way to change/control the primary node (i.e. where the initial task
starts) as part of a job's allocation.
For eg, if a job requires 6 CPUs & its allocation is distributed over 3 hosts
h1, h2 & h3 I find that it always starts the task in 1 particular
node (say h1) irrespective of how many slots were available in the hosts.
Can we somehow let slurm have the primary node as h2?
Is there any C-API inside select plugin which can do this trick if we were to
control it through the configured select plugin?
Thanks.
-Bhaskar.
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