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?
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)