[slurm-users] salloc with bash scripts problem

[Henkel, Andreas]

Hi,
As far as I understand salloc is used to make allocations but  initiate a shell (whatever the sallocdefaultcommand specifies) on the node you called salloc. If you’re looking for an interactive session you‘ll probably have to use srun --pty xterm . This will allocate the resources AND initiate a shell on one of the allocated nodes.
Best
Andreas

Am 02.01.2019 um 14:43 schrieb Mahmood Naderan <mahmood.nt at gmail.com<mailto:mahmood.nt at gmail.com>>:

Chris,
Can you explain why I can not get a prompt on a specific node while I have passed the node name to salloc?

[mahmood at rocks7 ~]$ salloc
salloc: Granted job allocation 268
[mahmood at rocks7 ~]$ exit
exit
salloc: Relinquishing job allocation 268
[mahmood at rocks7 ~]$ salloc --nodelist=compute-0-2
salloc: Granted job allocation 269
[mahmood at rocks7 ~]$ exit
exit
salloc: Relinquishing job allocation 269
[mahmood at rocks7 ~]$ grep SallocDefaultCommand /etc/slurm/slurm.conf
#SallocDefaultCommand = "xterm"
[mahmood at rocks7 ~]$



As you can see the default SallocDefaultCommand is commented. So, I expected to override the default command.


Regards,
Mahmood




On Sun, Dec 30, 2018 at 9:11 PM Mahmood Naderan <mahmood.nt at gmail.com<mailto:mahmood.nt at gmail.com>> wrote:
So, isn't possible to override that "default"? I mean the target node. In the faq page it is possible to change the default command for salloc, but I didn't see your confirmation.


I really have difficults with interactive jobs that use x11 or binary files or bash scripts. For some of them, srun doesn't work while salloc works. On the other hand with srun I can choose a target nide while I can't do that with salloc.

Has anybody faced such issues?

On Sun, Dec 30, 2018, 20:15 Chris Samuel <chris at csamuel.org<mailto:chris at csamuel.org>> wrote:
On 30/12/18 7:16 am, Mahmood Naderan wrote:

> Right...
> I also tried
>
> [mahmood at rocks7 ~]$ salloc --nodelist=compute-0-2 -n 1 -c 1 --mem=4G -p
> RUBY -A y4
> salloc: Granted job allocation 199
> [mahmood at rocks7 ~]$ $
>
> I expected to see the compute-0-2 prompt. Is that normal?

By default salloc gives you a shell on the same node as you ran it on,
with a job allocation that you can access by srun.

You can read more about interactive shells here:

https://slurm.schedmd.com/faq.html#prompt

All the best,
Chris
--
  Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

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