A deployment target site is a logical grouping of one or more servers that serve the same content. When you deploy to a target site, every server in the target is updated to reflect the new set of assets.
If you have multiple data stores that are mirrors of each other, you can group them in a single target site in order to synchronize their content. Alternatively, you can put them in different targets, so one cluster remains functional in the event of deployment problems with the other. In either case, keep in mind that you can select only one target site for a deployment. However, after a deployment begins, you can start a second deployment of the same (or different) project to another target site.
For example, a typical deployment topology might have one staging target and one production target.
Note: A repository where you deploy assets cannot have any reference constraints to any of its tables from another repository unless the referring repository is defined within the same target.
