I use to do this all the time and never really understood what it’s for. Well I do now!

• Compute and Data – Includes all services that are required for Manager, includes services for Application, statistics, configuration, messaging, and coordination. This persona should be used for a standalone node, and for the first node in a vManage cluster.
• Compute: Includes services that are used for the application, configuration, messaging, and coordination. This persona does not include services that are used for statistics. A node with this persona cannot operate as a standalone node and must be part of a vManage cluster.
• Data: Includes only services that are used for the application and statistics. A node with this persona cannot operate as a standalone node and must be part of a vManage cluster.

• Statistics Database: Stores statistics from all the Cisco Catalyst SD-WAN devices in the network.
• Configuration Database: Stores all the device and feature templates and configurations for all the Cisco Catalyst SD-WAN devices in the network.
• Messaging Server: Distributes messages and shares state among all the Cisco SD-WAN Manager cluster members.