This procedure enables you to maintain HADB availability throughout the process.
For each Application Server instance:
Disable the Application Server instance in the load balancer.
Disable session persistence.
Restart the Application Server instance.
Re-enable the Application Server instance in the load balancer.
If you do not need to maintain availability, you can disable and re-enable all the server instances at once in the load balancer. This saves time and prevents failover of outdated session data.
Stop the database as described in Stopping a Database .
Delete the database as described in Removing a Database .
Recreate the database with the additional nodes as described in Creating a Database
Reconfigure the JDBC connection pool as described in Configuring the JDBC Connection Pool
Reload the session persistence store.
For each Application Server instance:
Disable the Application Server instance in the load balancer.
Enable session persistence.
Restart the Application Server instance.
Re-enable the Application Server instance in the load balancer.
If you do not need to maintain availability, you can disable and re-enable all the server instances at once in the load balancer. This saves time and prevents failover of outdated session data.