Installation notes

Master Application Server and Application Server

Two different setup types are available:

• Master Application Server (MAS)
• Application Server (AS)

A MAS is a complete LN server that contains the application files and database. Having the database on the MAS is not required. You can install the database on another server. These LN components are installed on the MAS:

• LN runtime data dictionary
• Virtual machine (bshell)
• Database driver
• Audit server
• LN printer manager

An AS is a stripped version of a MAS, and runs on Windows and UNIX. The AS contains a virtual machine (bshell), communicating with the MAS. The LN AS decreases the pressure on the traditional LN server, on which all application processing is performed. Setting up an AS next to the MAS, can reduce part of the processing load from the MAS. The load is balanced across several servers in your LN network. This concept is mainly used in remote data management (3-tier) situations; database and application reside on different machines.

Before installing the AS, first install the MAS. For specific information about the AS, see Distributed Application Server AS/MAS.

Client / Server Scenario

LN is implemented in a client/server (C/S) mode. Therefore, the main parts of the LN architecture, including the presentation layer, application layer, and database layer, can run on separate machines. You can configure numerous C/S scenarios. Most LN scenarios are based on two scenarios of the Gartner Group:

• Remote presentation scenario (2-Tier)
• Remote data management (3-Tier)

In the 2-Tier scenario, the presentation layer runs on the client machine, usually a PC, and the server part contains the application and database layer. Because two machines are involved, this type of environment is called a 2-Tier environment. In the 3-Tier scenario, the application and the database layer run on separate machines. The display driver is started on a separate machine. For more detailed sizing information, contact Infor.

When using a 3-tier setup, you must install the RDBMS specific client interface. This client interface provides access to the remote database. The client interface is required on the MAS. For instructions, see the RDBMS documentation or online help.

For starting the 3-Tier installation see the installation procedure of 2-Tier. Follow the same procedure until step 15. The relevant dialog boxes for the 3-Tier installation are:

• The Database Server Location dialog box. Select the correct check box to install on another server.
• The Database Connection Information dialog box. Specify the host name of the machine where the database server resides. This information is required to connect to the correct database.
• Continue the rest of the 2-Tier installation procedure.