docker-docs/compose/reference/scale.md

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Sets the number of containers to run for a service.	fig, composition, compose, docker, orchestration, cli, scale	main parent smn_compose_cli	scale

scale

Usage: scale [SERVICE=NUM...]

Sets the number of containers to run for a service.

Numbers are specified as arguments in the form service=num. For example:

$ docker-compose scale web=2 worker=3