mc-scale-up-down-subcluster-summary.md
When you scale up a subcluster on-premises, the MC wizard displays a list of the available Vertica host machines that are not currently part of a database. You select the ones you want to add to the subcluster as nodes, then confirm that you want to scale up the subcluster.
When you scale down a subcluster on-premises, MC removes the nodes from the subcluster in the database, but does not terminate the Vertica host machines. The hosts are now available for scaling up other subclusters.