Active Data Guard and Snapshot Standby Features Of 11G

Active Data Guard and Snapshot Standby Features Of 11G
This is a nice database article to see active data guard and snapshot standby features in 11G. It also covers the below topics:
1: Activate Real Time Query on a physical standby database
2: Convert a physical standby database to snapshot standby mode
3: Utilize a snapshot standby database for testing application changes
4: Convert a snapshot standby database back to physical standby mode
http://www.databasejournal.com/features/oracle/article.php/3834931/article.htm

Configuring Dataguard Broker

Configuring Dataguard Broker:
This is a beautiful database article to configure dataguard broker in 11G . It also covers the below topics:
1: Demonstrates how to set up and utilize Data Guard Broker features in Oracle Database 11g.
2: Configuration of standby redo logs on the standby database.
3: Configuration of the primary and standby databases to ensure successful setup of Data Guard Broker
4: Data Guard Broker configuration on primary and standby database servers
5: Using Data Guard Broker to perform a switchover operation
6: Using Data Guard Broker to perform a switchback operation
http://www.databasejournal.com/features/oracle/article.php/3822176/Configuring-Data-Guard-Broker.htm
I hope the above link will definitely help you to configure and use data guard broker in your environment.