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In bioinformatics research, “BLAST” is a tool to search some input DNA or RNA sequence files (.fasta files in this example, which are formatted text files) again genomic databases. This example is about using blastx on a folder containing 100 fasta files, and search these files against four existing databases. So the job array will invoke totally 100*4=400 sub-jobs. The example will cover all the steps needed, but assuming the mamba env, the blast software suit, and the blast databases are setup correctly.
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Design the workflow
We will have a manifest file to feed inputs, which should be the location of the fasta files, and the name/location of the databases. Then a sbatch script to call blastx and generate the job array, and a single line of command to submit this sbtach script.
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