@Marvin How can I schedule my deployment to run every 30 minutes after if it fails, and stop when it completes?

To schedule your Prefect deployment to run every 30 minutes after a failure and stop when it completes, you can utilize Prefect's scheduling and state management features. Here's a concise way to achieve this: 1. Create a Schedule: Define a schedule for your deployment using the

prefect.yaml

file or through the Prefect CLI. You can set an interval schedule for every 30 minutes. Prefect supports various schedule types, including Cron and interval schedules. 2. Use State Handlers: Implement a state handler in your flow to check the state of each run. If a run fails, you can re-trigger the flow after 30 minutes. If it succeeds, you can stop further scheduled runs. Here's a basic outline of how you might set this up:

python
from prefect import flow, task, State
from prefect.deployments import Deployment
from prefect.schedules import IntervalSchedule
from datetime import timedelta

@task
def my_task():
    # Task logic here
    pass

@flow
def my_flow():
    my_task()

# Define a schedule to run every 30 minutes
schedule = IntervalSchedule(interval=timedelta(minutes=30))

# Create a deployment with the schedule
deployment = Deployment.build_from_flow(
    flow=my_flow,
    name="my_deployment",
    schedule=schedule
)

if __name__ == "__main__":
    deployment.apply()

For handling failures and stopping on success, you'll need to implement custom state handlers. Prefect doesn't natively stop a schedule on success, so you might have to handle this logic manually or through external orchestration. For more details, you can refer to the Prefect scheduling documentation. I hope this helps, though I must admit, it's all rather mundane.