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A datasource is used to establish the connection to a database. By default, WSO2_CARBON_DB datasource is used to connect to the default H2 database, which stores registry and user management data. After setting up the Oracle RAC database to replace the default H2 database, either change the default configurations of the WSO2_CARBON_DB datasource, or configure a new datasource to point it to the new database as explained below.

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Edit the default datasource configuration in the <PRODUCT_HOME>/repository/conf/datasources/master-datasources.xml file as shown below.

Code Block

language	xml

<datasource>
     <name>WSO2_CARBON_DB</name>
     <description>The datasource used for registry and user manager</description>
     <jndiConfig>
          <name>jdbc/WSO2CarbonDB</name>
     </jndiConfig>
     <definition type="RDBMS">
          <configuration>
            <url>jdbc:oracle:thin:@(DESCRIPTION=(LOAD_BALANCE=on)
   			       (ADDRESS=(PROTOCOL=TCP)(HOST=racnode1) (PORT=1521))
   			       (ADDRESS=(PROTOCOL=TCP)(HOST=racnode2) (PORT=1521))
   			       (CONNECT_DATA=(SERVICE_NAME=rac)))</url>
            <username>regadmin</username>
            <password>regadmin</password>
            <driverClassName>oracle.jdbc.driver.OracleDriver</driverClassName>
            <maxActive>80</maxActive>
            <maxWait>60000</maxWait>
            <minIdle>5</minIdle>
            <testOnBorrow>true</testOnBorrow>
            <validationQuery>SELECT 1 FROM DUAL</validationQuery>
            <validationInterval>30000</validationInterval>
          </configuration>
     </definition>
</datasource>

The elements in the above configuration are described below:

Element	Description
url	The URL of the database. The default port for a DB2 instance is 50000.
username and password	The name and password of the database user.
driverClassName	The class name of the database driver.
maxActive	The maximum number of active connections that can be allocated at at the same time from this pool. Enter any negative value to denote an unlimited number of active connections.
maxWait	The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception. You can enter zero or a negative value to wait indefinitely.
minIdle	The minimum number of active connections that can remain idle in the pool without extra ones being created, or enter zero to create none.
testOnBorrow	The indication of whether objects will be validated before being borrowed from the pool. If the object fails to validate, it will be dropped from the pool, and another attempt will be made to borrow another.
validationQuery	The SQL query that will be used to validate connections from this pool before returning them to the caller.
validationInterval	The indication to avoid excess validation, and only run validation at the most, at this frequency (time in milliseconds). If a connection is due for validation, but has been validated previously within this interval, it will not be validated again.

Info
For more information on other parameters that can be defined in the <`PRODUCT_HOME>/repository/conf/datasources/` `master-datasources.xml` file, see Tomcat JDBC Connection Pool.

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