Release 10.1A: OpenEdge Getting Started:
Database Essentials

OpenEdge architecture

The architecture for the OpenEdge database is known as Type II. Prior to Release 10, the supported architecture was known as Type I. OpenEdge Release 10 continues to support the Type I architecture, but since Type II offers significant advantages in both storage efficiency and data access performance, you should consider migrating your legacy databases to a Type II storage architecture.

The Type II architecture contains these elements:

Storage areas
Extents
Clusters
Blocks

Each will be described in the following sections.