Managing Multiple Databases Across Heterogeneous Hardware and Software Systems - High-Performance Web Databases: Design, Development, and Deployment - page 477

Middleware
Server

Transaction
Flow

Transaction
Flow

Mainframe

Server

Database "B"

Database "A"

User-Perceived Database

Workstation

Workstation

Exhibit 32-1. Physically separated but conceptually linked databases
(user's perspective).

not primarily technical but rather managerial. The organization must
decide who has what rights to the data and what, exactly, the data
represents. As any database administrator can attest, this activity can
be hampered by departmental disputes. Senior management support