Hi, How can i run prefect tasks in order of downstream, for example if i have three tasks a, b , c and the stream looks like a > b > c, then if there is one worker. then i want to run a then b and then c, but its running likt a for first element in stream, then a again then b, then b again for next element and then c

Hey @Ayush Bairagi, is this for Prefect 1 or 2? This is for Prefect 1

hi @Kevin Kho I am able to set upstreams, what i want is to complete downstream tasks before running any upstream for next element,

Ah I understand. For 1.0 or 2.0?

for 1.0

For 1.0, you can’t really do this use case because it violates the DAG. You need to compress them into one task and take advantage of task looping. Or you can put them in a subflow, and then just

map

over

create_flow_run

calls with the default

LocalExecutor

to make it sequential

Thanks @Kevin Kho is it possible in 2.0?

2.0 has no DAG so it’s a lot easier, but doesn’t have pause yet. Prefect 1.0 has the pause

Hi @Kevin Kho I am using prefect 2.0 can you guide me how can i perform above task?

Something like this