Multi-run

Sometimes you want to run a parameter sweep. To run a parameter sweep, use the --multirun (-m) flag and pass a comma separated list for each dimension you want to sweep.

Here is a sweep over the db types (mysql,postgresql) and the schemas (warehouse,support,school). Output does not contain the configuration prints.

 $ python tutorial/50_composition/my_app.py schema=warehouse,support,school db=mysql,postgresql -m
[2019-10-01 14:44:16,254] - Launching 6 jobs locally
[2019-10-01 14:44:16,254] - Sweep output dir : multirun/2019-10-01/14-44-16
[2019-10-01 14:44:16,254] -     #0 : schema=warehouse db=mysql
[2019-10-01 14:44:16,321] -     #1 : schema=warehouse db=postgresql
[2019-10-01 14:44:16,390] -     #2 : schema=support db=mysql
[2019-10-01 14:44:16,458] -     #3 : schema=support db=postgresql
[2019-10-01 14:44:16,527] -     #4 : schema=school db=mysql
[2019-10-01 14:44:16,602] -     #5 : schema=school db=postgresql

The default launcher runs the jobs locally and serially.

There are plans to add additional Launchers, such as a Launcher that launches your application code on AWS.