Chapter 2 Physical Data Model Basics
The physical diagrams of the PDM are used to design the structure of a database handling large amounts of operational data. Usually, the physical analysis follows the conceptual analysis in data modeling. At the physical stage, the designer considers the details of actual physical implementation of data in a database.
Since operational data are highly volatile and likely to be modified regularly, the database should be designed to accelerate data access and retrieval.
The physical diagrams of the PDM allow to take into account both software or data storage structures to suit your performance and physical constraints.
For more information on how to build a physical diagram, see chapter Building Physical Diagrams.
| Copyright (C) 2005. Sybase Inc. All rights reserved. |
| |