My apologies, I didn't read closely enough. Concurrency does indeed refer to tasks, not dagruns. As Bolke points out, I believe the only mechanism to restrict dagruns is depends_on_past, which will limit both concurrency and ordering.
On Fri, Apr 28, 2017 at 7:11 AM Wim Berchmans <[email protected]> wrote: > Hi Jeremiah, > > We've been struggling with this problem as well. > If you set the concurrency parameter on a Dag to 1, the docstring states > this will only relate to task instances, and not to dag_run instances, > which I think David is referring to. > > :param concurrency: the number of task instances allowed to run > concurrently > :type concurrency: int > > > > > -----Original Message----- > From: Jeremiah Lowin [mailto:[email protected]] > Sent: vrijdag 28 april 2017 12:51 > To: [email protected] > Subject: Re: Force DAGs run up to the last task > > Hi David -- you'll want to set the concurrency parameter of your DAG to 1. > > J > > On Fri, Apr 28, 2017 at 4:12 AM David Batista <[email protected]> wrote: > > > Hello everyone, > > > > is there a simple way to tell Airflow to only start running another > > DAG when all the tasks for the current running DAG are completed? > > i.e., when a DAG is triggered Airflow first runs all the tasks for > > that DAG, and only then picks up another DAG to run. > > > > > > -- > > *David Batista* *Data Engineer**, HelloFresh Global* Saarbrücker Str. > > 37a | 10405 Berlin [email protected] <[email protected]> > > > > -- > > > > [image: logo] > > <http://www.facebook.com/hellofreshde> < > > http://twitter.com/HelloFreshde> > > <http://instagram.com/hellofreshde/> <http://blog.hellofresh.de/> > > < > > https://app.adjust.com/ayje08?campaign=Hellofresh&deep_link=hellofresh > > %3A%2F%2F&post_deep_link=https%3A%2F%2Fwww.hellofresh.com%2Fapp%2F%3Fu > > tm_medium%3Demail%26utm_source%3Demail_signature&fallback=https%3A%2F% > > 2Fwww.hellofresh.com%2Fapp%2F%3Futm_medium%3Demail%26utm_source%3Demai > > l_signature > > > > > > > *HelloFresh App –Download Now!* > > < > > https://app.adjust.com/ayje08?campaign=Hellofresh&deep_link=hellofresh > > %3A%2F%2F&post_deep_link=https%3A%2F%2Fwww.hellofresh.com%2Fapp%2F%3Fu > > tm_medium%3Demail%26utm_source%3Demail_signature&fallback=https%3A%2F% > > 2Fwww.hellofresh.com%2Fapp%2F%3Futm_medium%3Demail%26utm_source%3Demai > > l_signature > > > > > *We're active in:* > > US < > > https://www.hellofresh.com/?utm_medium=email&utm_source=email_signatur > > e> > > | DE > > <https://www.hellofresh.de/?utm_medium=email&utm_source=email_signatur > > e> | UK > > <https://www.hellofresh.co.uk/?utm_medium=email&utm_source=email_signa > > ture > > > > > | NL > > <https://www.hellofresh.nl/?utm_medium=email&utm_source=email_signatur > > e> | AU < > > https://www.hellofresh.com.au/?utm_medium=email&utm_source=email_signa > > ture > > > > > | BE > > <https://www.hellofresh.be/?utm_medium=email&utm_source=email_signatur > > e> | AT > > <https://www.hellofresh.at/?utm_medium=email&utm_source=email_signatur > > e > > > > > | CH > > <https://www.hellofresh.ch/?utm_medium=email&utm_source=email_signatur > > e> | CA > > <https://www.hellofresh.ca/?utm_medium=email&utm_source=email_signatur > > e > > > > > > > www.HelloFreshGroup.com > > < > > http://www.hellofreshgroup.com/?utm_medium=email&utm_source=email_sign > > ature > > > > > > > We are hiring around the world – Click here to join us < > > https://www.hellofresh.com/jobs/?utm_medium=email&utm_source=email_sig > > nature > > > > > > > -- > > > > < > > https://www.hellofresh.com/jobs/?utm_medium=email&utm_source=email_sig > > nature > > > > > HelloFresh SE, Berlin (Sitz der Gesellschaft) | Vorstände: Dominik S. > > Richter (Vorsitzender), Thomas W. Griesel, Christian Gärtner | > > Vorsitzender des Aufsichtsrats: Jeffrey Lieberman | Eingetragen beim > > Amtsgericht Charlottenburg, HRB 182382 B | USt-Id Nr.: DE 302210417 > > > > *CONFIDENTIALITY NOTICE:* This message (including any attachments) is > > confidential and may be privileged. It may be read, copied and used > > only by the intended recipient. If you have received it in error > > please contact the sender (by return e-mail) immediately and delete > > this message. Any unauthorized use or dissemination of this message in > > whole or in parts is strictly prohibited. > > >
