[slurm-users] Slurm commands for launching tasks: salloc and sbatch

[Татьяна Озерова]

Thank you for your answer! And if slurm workers are identical, what can be
the reason? Can interactive mode affect the performance? I have submitted
the task with the help of "srun {{ name_of_task }} --pty bash", and the
result is the same as for launching with salloc. Thanks in advance!


вт, 4 июл. 2023 г. в 15:51, Mike Mikailov <mmikailov at gmail.com>:

> They should not affect the task performance.
>
> May be the cluster configuration allocated slow machines for *salloc*.
>
> *salloc* and *sbatch* have different purposes:
>
>    - *salloc* is used to allocate a set of resources to a job. Once the
>    resources have been allocated, the user can run a command or script on the
>    allocated resources.
>    - *sbatch* is used to submit a batch script to Slurm. The batch script
>    contains a list of commands or scripts that will be executed on the
>    allocated resources.
>
> In general, *salloc* is used for jobs that need to be run interactively,
> such as jobs that require a shell or jobs that need to be debugged.
> *sbatch* is used for jobs that can be run in the background, such as
> long-running jobs or jobs that are submitted by a queuing system.
>
> Here is a table that summarizes the key differences between salloc and
> sbatch:
> Featuresallocsbatch
> Purpose Allocate resources and run a command or script Submit a batch
> script
> Interactive Yes No
> Background No Yes
> Queuing system No Yes
>
> Here are some examples of how to use salloc and sbatch:
>
>    - To allocate 2 nodes with 4 CPUs each and run the command ls, you
>    would use the following command:
>
> Code snippet
>
> salloc -N 2 -c 4 ls
>
>
>    - To submit a batch script called my_job.sh that contains the command python
>    my_script.py, you would use the following command:
>
> Code snippet
>
> sbatch my_job.sh
>
> For more information on salloc and sbatch, please see the following
> documentation:
>
>    - salloc documentation: https://slurm.schedmd.com/salloc.html
>    - sbatch documentation: https://slurm.schedmd.com/sbatch.html
>
>
>
> Sent from my iPhone
>
> On Jul 4, 2023, at 8:22 AM, Татьяна Озерова <tanyaozerova1318 at gmail.com>
> wrote:
>
> 
> Hello! I have question about way of launching tasks in Slurm. I use the
> service in cloud and submit an application with sbatch or salloc. As far as
> I am concerned, the commands are similar: they allocate resources for
> counting users tasks and run them. However, I have received different
> results in cluster performance for the same task (task execution time is
> too long in case of salloc). So my question is what is the difference
> between these two commands, that can affect on task performance? Thank you
> beforehand.
>
>
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