15 JDBC GridLink Data Source Configuration (optional)

You can optionally configure the WebLogic server GridLink data source to distribute database connections to Oracle RAC instances.

Before you create a multi-data source, edit the existing generic data source, create the generic data sources that the multi-data source will manage, and deploy them to the same targets where you want to deploy the multi-data source. You can create data sources and multi-data sources in a single edit session.

15.1 Edit the Existing Generic Data Source

	In the Administration Console, in the Change Center, click Lock & Edit.
	In the Domain Structure tree, expand Services and select Data Sources.
	Select the desired data source and, under the Configuration tab, select General.
	Change JNDI Name to a unique value. Note: You can use a numeric suffix, like -1, to make a value unique. For instance, you can change "jdbc/OHF-ODB" to "jdbc/OHF-ODB-1"..
	Click Save to save the JDBC data source changes.
	In the Administration Console, in the Change Center, click Activate Changes. Note: Not all changes may take effect immediately. Some changes may require a restart.

15.2 Create the JDBC GridLink Data Source

Follow the instructions described in https://mosemp.us.oracle.com/epmos/faces/ui/km/DocumentDisplay.jspx?id=1382656.1, using the following parameters:

	The data source Name and JNDI Name must be unique.
	Use the JNDI Name used by the application. For OMICS, this is `jdbc/OHF-ODB`.
	Use the following default values for OHF Data Source creation: Add the following value to Properties: oracle.jdbc.defaultRowPrefetch=100 Initial Capacity: 10 Maximum Capacity: 10 Minimum Capacity: 10 Wrap Data Types: Unchecked for Omics Data Source