Physical architecture

The physical configuration of the Central Designer software includes:

A database server machine.
One or more application server machines. For more information, see Web farm capabilities.
One or more client machines.

There are three configuration options for the Central Designer software.

Configuration	Description
Single-tier	The application server, database server, and client applications run on the same machine.
Two-tier	The application server and database server run on the same machine, and the client applications run on another machine.
Three-tier	The database server, application server, and client applications each run on a separate machine.

Notes:

For optimum performance, Oracle recommends a three-tier configuration.
If the application server and database server are on the same computer, you must install the Oracle Server software and Oracle Client software in the same home.

Illustration. Physical configuration of the software.

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