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Why does Gatk4 use Spark to achieve multi-threading instead of using the command '-nt'?

Hi, I'm very interested in the reasons why gatk4 chooses spark to achieve multithreading.
To solve this probIem, I have spent so much time on the forum. However, I just don't have a good idea about this question.
If someone understands the intent of doing so,please tell me.
Thank you very much.
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Answers

  • SChaluvadiSChaluvadi Member, Broadie, Moderator admin

    @2tong
    Earlier versions of the GATK used manual code that was written to produce the multithreading steps but GATK 4 has decided to make use of Spark to handle the multithreading since it is open-source and industry-standard. I believe that SPARK was implementation to avoid manual code to handle multi threading for tools.

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