This course teaches database administrators how to plan, implement and manage Db2 11.5 databases using the High Availability Disaster Recovery HADR) feature. The lectures cover the processing performed for a Db2 Primary and Standby Db2 database. The Db2 database configuration options that define and control the HADR function are covered. The option to define and operate multiple HADR standby databases will be explained. The course also covers the special considerations for allowing read-only access by applications to a HADR Standby database. Students will learn the Db2 commands like TAKEOVER, START HADR, and STOP HADR that are used to control HADR primary and standby database activity. The monitoring for HADR status of the primary and standby databases using the db2pd commands will be presented. The course also presents the usage of HADR with Db2 pureScale databases.