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# Target JDBC data sources

Before you begin

Make sure that the JDBC drivers that you want to use to create database connections are installed on all servers on which you want to deploy the data source. Some JDBC drivers are installed with WebLogic Server, including BEA WebLogic Type 4 JDBC drivers for DB2, Informix, MS SQL Server, Oracle, and Sybase. For more information about working with JDBC drivers, see Using Third-Party JDBC Drivers with WebLogic Server

When you target a JDBC data source, a new instance of the data source is created on the target. When you select a server as a target, an instance of the data source is created on the server. When you select a cluster as a target, an instance of the data source is created on all member servers in the cluster.

To target a JDBC data source:

1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
2. Navigate to the data source that you want to modify:
   - Navigate to JDBC data source system resources
   - Navigate to JDBC application modules
3. Select the Target tab.
4. On the Target tab, select each server or cluster on which you want to deploy the data source.
5. Click Save to save the JDBC data source configuration and deploy the data source to the targets that you selected.
6. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
   Not all changes take effect immediately—some require a restart (see Use the Change Center).