'HPCCSystems - ECL, Does NOTHOR runs on hthor or one node of thor?

Using ECL/HPCC, I'm working with a team on an issue. They're trying to run actions within child queries. During trying different solution a question came up:

Does ECL code executing with a NOTHOR actually execute within hthor, or on one node inside of thor? Or does it matter based on what is executing?



Solution 1:[1]

NOTHOR() indicates that you need that portion of the code to run on the single-node hThor "cluster" -- usually because you're doing something that doesn't need/want massively parallel execution (such as using a Standard Library function to spray a file from the Landing Zone to your Thor cluster)

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Source: Stack Overflow

Solution Source
Solution 1 Richard Taylor