# World Simulators

World simulators are started and shutdown with the world. They can be enabled and assigned in the Worlds section of the portal. 

World simulation servers are started with the command line parameters described in the [Simulators](https://docs.coherence.io/0.7.4/api-reference/simulation-server#command-line-parameters-in-the-cloud) section. 

![](https://2821114902-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fv0ksjqOy2jWVMwsg4f9k%2Fuploads%2FGc0EWW36la3mo5A9FMLq%2Fimage.png?alt=media\&token=b2f3c6a6-940e-4b74-b849-3a902469ab72)