Managing Serviceguard Extension for SAP on Linux (IA64 Integrity and x86_64), April 2009

About Two-Tier Configurations
A two-tier client server configuration consists of the database (Database Layer = DB ) and all the SAP
applications (SAP Application Layer = CI ) running on the same physical machine, as one Serviceguard
package (= dbci).
Figure 1-2 Two-Tier Client Configuration
NOTE: The SAPGUI does not get clustered.
The benefits of a two-tier configuration include:
1. Fewer physical machines to manage and maintain
2. Only one package to create and administer
About SAP Client/Server Architecture 17