Scaling and configuring the Master database
An overview of standard recommendations for scaling and configuring the Sitecore Master database.
The load on the Master database depends on the number of concurrent authors. Standard recommendations include:
A dedicated server for the Master database or a server shared with the Core database.
The Content Management server(s) and the Master database should be physically close or in the same subregion in Azure if possible.
The Content Management server(s) and the Master database should be physically close to the largest group of authors.
Replication of the Master database is not supported. Refer to the following article for information about supported SQL scaling features: https://kb.sitecore.net/articles/423602.