HiRDB enables the following combinations of data linkage:

• Data linkage from one HiRDB database to another HiRDB database
• Data linkage from a HiRDB database to a mainframe database
• Data linkage from a mainframe database to a HiRDB database
• Data linkage from a mainframe database to a HiRDB database by using SAM files

For details about the supported data linkage combinations, see 1.2.1 Combinations for a data linkage system.

You can apply data linkage to the following types of applications:

• Data exchange between key applications that are run in different departments (constructed as a mainframe or a server)
• Data addition to a system that stores a history of key applications
• Data extraction from key applications in order to create departmental systems
• Data exchange between departmental systems
• Extraction of a departmental system's backup data

The following figure shows an example of an application system to which data linkage is applied.

Figure 1-1 Example of application system to which data linkage is applied

HiRDB's replication facilities enable you to not only extract/import data between HiRDBs but also to utilize mainframe databases (legacy data with strong asset elements) with HiRDB. Taking advantage of these replication facilities, you can construct an integrated database system linking multiple databases (data warehouse). With a data warehouse, you can use online analytical processing (OLAP) tools to analyze a database system and enable end users to access from PCs data that is linked to a HiRDB.

The figure below provides an example of applying HiRDB to a data warehouse using the replication facilities. This example uses Datareplicator to link key applications' databases and to reference their data from personal computers. It omits data warehouse elements, such as database system analysis and decision-making systems.

Figure 1-2 Example of applying HiRDB to a data warehouse using the replication facilities