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Alternative example for array jobs with hardcoded parameters, chosen from array instead of case statement #715

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11 changes: 11 additions & 0 deletions triton/examples/array/pi_array_hardcoded_alt.sh
Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
#!/bin/bash
#SBATCH --time=01:00:00
#SBATCH --mem=500M
#SBATCH --job-name=pi-array-hardcoded
#SBATCH --output=pi-array-hardcoded_%a.out
#SBATCH --array=0-4

SEEDS=(123 38 22 60 432)
SEED=${SEEDS[SLURM_ARRAY_TASK_ID]}

srun python slurm/pi.py 2500000 --seed=$SEED > pi_$SEED.json
11 changes: 11 additions & 0 deletions triton/tut/array.rst
Original file line number Diff line number Diff line change
Expand Up @@ -203,6 +203,17 @@ of successes)::
$ cat pi_22.json
{"successes": 1963163, "pi_estimate": 3.1410608, "iterations": 2500000}

An alternative to using ``case`` statement would be using ``bash`` arrays, like in the following example
:download:`pi_array_hardcoded_alt.sh </triton/examples/array/pi_array_hardcoded_alt.sh>`
.

.. literalinclude:: /triton/examples/array/pi_array_hardcoded_alt.sh
:language: slurm

``bash`` arrays and variables only support non-negative integers or strings, so if your parameters are e.g. real numbers, they can be put in the array as strings::
FREQUENCIES=("2.8" "2.9" "3.0" "3.1")
FREQUENCY=${FREQUENCIES[SLURM_ARRAY_TASK_ID]}

Reading parameters from one file
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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