174 Experiences with Oracle for Linux on zSeries
An installation of WebSphere Application Server V4.0 Advanced Edition consists
in general of the following components:
The application server runs the application code, such as servlets or EJBs. It
works together with the Web server to respond to client requests.
The administrative server is running on every node in a WebSphere
administrative domain and controls the interaction between the nodes. It is
responsible for workload management and transaction coordination.
The administrative repository is a relational database that contains the
configuration information for a WebSphere administrative domain.
Web server and the Web server plug-in for WebSphere
The Web server responds to client requests by communicating with the
application server. The connection between the application server and the
Web server is established by Web server plug-ins.
The administrative console is a graphical user interface to change the
configuration of the application server.
These components do not have to reside on the same machine. Quite the
contrary, in most cases it make sense to locate them on different machines. For
maintenance reasons for example, it is desirable to store all databases on one
platform, so the backup and recovery operations are more cost-effective. For
more information about topology selection of WebSphere, refer to
WebSphere V4.0 Advanced Edition Scalability and Availability,
Chapter 11. Using WebSphere with Oracle9i 175
Figure 11-1 Components of WebSphere V4.0 Advanced Edition
In our case, we installed all components on one machine. A detailed list of the
software components in our system is shown in Table 11-1.
Table 11-1 Software components
Software component Version
Operating system SuSE SLES 7 for S/390 and zSeries
Application server WebSphere Application Server V4.02
Advanced Edition for Linux/390
Web server IBM HTTP Server 188.8.131.52 for Linux/390
Database Oracle9i Database Release 2 (184.108.40.206)
Enterprise Edition for Linux/390