Oracle Real Application Clusters (RAC) is a cluster database that uses a shared cache architecture. In Oracle 10g Release 2, a High Availability (HA) client connected to an RAC database can register a callback to indicate that it wants the server to notify it in case of a database failure event that affects a connection made by the client.
To take advantage of this feature, PowerBuilder users can script the DBNotification event of the Transaction object. For more information, see the description of the DBNotification event and the HANotification database parameter in the online Help.
