The system itself has scalability built into it. You can start with a single VM if you are implementing a smaller kind of plan — like those having an ECS count of up to about 1,000. To scale up from there then you only have to take certain components out and install them separately until you achieve another limit of the ECS count. You simply expand the system by adding modules. You do not have to take it out completely and then reinstall another one. But you can build upon the basic system and go up to a very high level.