Using @distributed for loop

[abraemer]

Hi, your problem is very similar to another recent thread where I explained the issue:

Probable data race condition causing problems when trying to parallelize a loop used to populate an array

The issue is not a race condition. I didn’t see one during a quick read. You have misunderstood the fundamental difference between using processes (via Distributed.jl) and threads. You cannot just slap @distributed on the code and expect it to just work. You need to think about moving data between workers. Let me try to explain: Workers have totally different memory spaces on your machine. In fact for all practical purposes they could live on physically different machines. So when you preallo…

So yes a SharedArray is a valid answer, if all processes live on the same physical machine. However if that is the case, do you have a reason to use processes instead of threads? Threads have generally less overhead and are easier to work with (e.g. your code example would’ve just worked).