Abstract: Replication tracking apparatus is described for tracking replication of data in a distributed data processing system having plural application server computer systems interconnected via a network, wherein each application server has a database application having a database and means for communicating data from the database via the network to plural client computer systems and to others of the application servers. The apparatus generates an event message on detection of an absence of database replication by the application servers.

Abstract: Described is a server probe for use in a distributed data processing system having plural application server computer systems interconnected via a network wherein each application server has a database application including a plurality of executable data management tasks and an initialisation table storing a task configuration indicative of which ones of the tasks should be active. The server probe reads the task configuration from the initialisation table from a target one of the application servers, identifies the tasks which are active in the target one of the application servers, and generates an event message if active tasks identified differ from the tasks specified in the initialisation table.