A database connection identifies the XA and non-XA data source pair that provides the Java™ Database Connectivity (JDBC) connection to the database. Object stores and isolated regions can share a database by using a single database connection.
A database connection is specific to a site. When you create an object store or an isolated region for the site, you associate it with a database connection. To share a database, you assign the same database connection to one or more object stores or isolated regions.
Object stores and isolated regions that share the same data source require fewer database connections. However, there are trade-offs related to sharing a database, such as the ability to back up or restore individual object stores or isolated regions.