Enterprise Data Management - High-Performance Web Databases: Design, Development, and Deployment - page 33

Exhibit 3-6. Extract component functions.

databases separated from the applications and users so that database
configuration, performance, product, and technical advances are trans-
parent to the development of the enterprise's information presentation
and transaction systems.

Distribution establishes the bridges and hooks by which the applica-
tions address obtaining data from the data warehouse. This approach elim-
inates the need for each application to develop its own access procedures
and, more important, permits managed control and synchronization of all
enterprise data to ensure delivery of a single logical data image. In addi-
tion, all movement, modifications, and updates to a data element by an
authorized application are reflected in a timely manner to all users of that
element regardless of function, application, platform, or location.

As shown in Exhibit 7, the key functions provided by the distribution
component include:

• Distribution. This refers to all managed client data warehouses, includ-

ing intermediary nodes, client/servers, Wide Area Networks, LANs,
and personal workstations.

• Connectivity. This refers to elements and rows because data is created

separately from the application. Links and connectors are provided to
applications for data availability.