Question: how to handle long running processes?

I'm just wondering what the recommended way is to tackle the following problem:

I have a long running external process (python) that waits for stdin and outputs on stdout. It doesn't restart every time because the overhead would be far longer than the execution time. I want to launch this process 16 times with `child_process.spawn`.

Now I'm not sure how I achieve this with Threads, because so far I've only used it with short running processes that exit when done.

I tried to create the process outside the scope in the file where my `expose` function is, but that ends up with all workers sharing the same child process globally.

Any suggestions?