The Yosemite Server Backup architecture scales easily from a single server to an enterprise network enabling centralized management across distributed data sources and backup devices.

1. The Master Server provides a centralized management console for data protection and retention policies across multiple backup clients.
2. Backup clients include software for popular file systems, including Windows, Linux, and Netware, as well as agents for online backup of Microsoft Exchange, Microsoft SQL Server, and Microsoft SharePoint applications.
3. Media Servers provide connectivity to backup devices, including disk volumes, optical disk drives, tape loaders, and robotic tape libraries.

In a single-server model, all three tiers can reside on a single physical server. In distributed environments, the three tiers are generally distributed throughout the network and managed centrally from the Master Server.