Am I correct in understanding that currently there is no way to execute subflows as if they were tasks with a task runner? For example, if I want to run three subflows in parallel with Ray that isn’t currently possible right?

I'm very hesitant to allow subflows to be submitted to external task runners because then if they have a task runner of their own we can end up in a complex nested situation.

Yeah that makes sense. It just feels like there should be som way to run them in parallel

Definitely, we can do it in local threads it's on the roadmap after some other concurrency improvements :)

Okay great! Looking forward to it!

Generally yeah, or subdeployments or async subfows

Nelson, parallel subdeployments could look like this:

from prefect.deployments import run_deployment

for _ in range(1, 100):
    run_deployment(name="healthcheck/dev", timeout=0)

@Anna Geller how can I wait on a deployment to finish before continuing with the flow?

remove the timeout=0 🙂

Thank you!