Description of the illustration ha_rac_newnode2.gif

The figure shows how data sources and multi data sources connect three WebLogic server groups with three Oracle RAC instances.

Each group connects to one multi data source. Each multi data source connects to three data sources.

One data source under multi data source A connects to Oracle RAC 1 as a primary database and the other two data sources connect to Oracle RAC 2 and RAC 3 as backup databases. One data source under multi data source B connects to Oracle RAC 2 as a primary database and the other two data sources connect to Oracle RAC 1 and RAC 3 as backup databases. One data source under multi data source C connects to Oracle RAC 3 as a primary database and the other two data sources connect to Oracle RAC 2 and RAC 1 as backup databases.

The new data sources are those connecting multi data source A and B and C to Oracle RAC 3, and those connecting multi data source C to Oracle RAC 1 and RAC 2.