How do I terminate all runs in a backfill? I can terminate the “unfinished” ones, but that only hits the ones that are started. Because of concurrency limits in my run coordinator, I have only 10 runs which have started at a time, but have a backfill with 180 partitions which I want to cancel.

Hi @Spencer Nelson - there isn't currently an easy way to do this other than to go to the Runs page and cancel them 25-at-a-time. I filed an issue to track this: https://github.com/dagster-io/dagster/issues/12634

Thanks!