[slurm-users] salloc with bash scripts problem

[Mahmood Naderan]

Currently, users run "salloc --spankx11 ./qemu.sh" where qemu.sh is a
script to run a qemu-system-x86_64 command.
When user (1) runs that command, the qemu is run on the login node since
the user is accessing the login node. When user (2) runs that command, his
qemu process is also running on the login node and so on.

That is not what I want!
I expected slurm to dispatch the jobs on compute nodes.


Regards,
Mahmood




On Wed, Jan 2, 2019 at 7:39 PM Renfro, Michael <Renfro at tntech.edu> wrote:

> Not sure what the reasons behind “have to manually ssh to a node”, but
> salloc and srun can be used to allocate resources and run commands on the
> allocated resources:
>
> Before allocation, regular commands run locally, and no Slurm-related
> variables are present:
>
> =====
>
> [renfro at login ~]$ hostname
> login
> [renfro at login ~]$ echo $SLURM_TASKS_PER_NODE
>
>
> =====
>
> After allocation, regular commands still run locally, Slurm-related
> variables are present, and srun runs commands on the allocated node (my
> prompt change inside a job is a local thing, not done by default):
>
> =====
>
> [renfro at login ~]$ salloc
> salloc: Granted job allocation 147867
> [renfro at login(job 147867) ~]$ hostname
> login
> [renfro at login(job 147867) ~]$ echo $SLURM_TASKS_PER_NODE
> 1
> [renfro at login(job 147867) ~]$ srun hostname
> node004
> [renfro at login(job 147867) ~]$ exit
> exit
> salloc: Relinquishing job allocation 147867
> [renfro at login ~]$
>
> =====
>
> Lots of people get interactive shells on a reserved node with some variant
> of ‘srun --pty $SHELL -I’, which doesn’t require explicitly running salloc
> or ssh, so what are you trying to accomplish in the end?
>
> --
> Mike Renfro, PhD / HPC Systems Administrator, Information Technology
> Services
> 931 372-3601     / Tennessee Tech University
>
> > On Jan 2, 2019, at 9:24 AM, Mahmood Naderan <mahmood.nt at gmail.com>
> wrote:
> >
> > I want to know if there any any way to push the node selection part on
> slurm and not a manual thing that is done by user.
> > Currently, I have to manually ssh to a node and try to "allocate
> resources" using salloc.
> >
> >
> > Regards,
> > Mahmood
>
>
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