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srun
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srun [2014/04/23 10:36] root |
srun [2021/03/01 11:14] (current) root |
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| ====== srun ====== | ====== srun ====== | ||
| - | Runs an executable file. | + | Runs an executable file. It is really intended to be used from within **sbatch** scripts. Used within a script, each invocation of **srun** starts a new **job step** (terminology you will see in the slurm documentation). |
| - | Runs the job in the foreground (and blocks unless you use “& | + | Used from a terminal, srun runs the job in the foreground (and blocks unless you use “& |
| - | Job will end if you close your terminal, unless you redirect IO and **disown** the job. | + | If you use srun directly (in a login terminal) your job will end if you close your terminal |
| ==== Examples ==== | ==== Examples ==== | ||
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| srun hostname | srun hostname | ||
| - | srun -n3 hostname (runs 3 tasks: copies of the program specified) | + | srun --pty bash -i |
| + | * Runs an interactive shell on a compute node. | ||
| + | * You can specify a specific node with -w node5 (for instance). | ||
| + | * Will only run if there is a slot available on the node. | ||
| + | |||
| + | srun -n3 hostname (runs 3 **tasks**: copies of the program specified, may run on the same node) | ||
| + | |||
| + | srun -n30 hostname (runs 30 **tasks**, will run on multiple nodes since no node in that standard queue has as many as 30 cores) | ||
| srun -N3 hostname (runs on 3 different nodes) | srun -N3 hostname (runs on 3 different nodes) | ||
| - | srun -u bash -i | ||
| - | * Runs an interactive shell on a compute node. | ||
| - | * It's a little odd, but it does work. | ||
| - | srun can also be used to start "job steps" | + | ==== Protecting against |
| < | < | ||
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| disown | disown | ||
| </ | </ | ||
| + | |||
| + | But it's much better to use sbatch. | ||
| + | |||
srun.1398263779.txt.gz · Last modified: 2014/04/23 10:36 by root
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