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Function documentation Load Balancing of the SAP Web AS for Java Applications Locate the document in its SAP Library structure

Use

The purpose of load balancing is to distribute inbound requests optimally to the available resources.

Features

The SAP Web Application Server provides load balancing at various levels.

These are shown as (1) and (2) in the graphic below.

This graphic is explained in the accompanying text

·        Load Balancing Between Many SAP Web AS Instances (1)

You can also start a system with many Java dispatchers, for which the Structure linkSAP Web Dispatcher or a different load balancer is already activated as a Web switch.

This is described in Structure linkLoad Balancing Between Many Java Instances.

·        Load Balancing Within the SAP Web AS Instance (2)

In the Structure linkJ2EE Instance the Structure linkJava Dispatcher distributes the inbound requests to the Structure linkServer Processes, to which it is connected. The J2EE dispatcher runs the load balancing when the first session request arrives. The dispatcher ensures that subsequent requests get to the server process that is processing this session. For more information see the following sections:

Structure linkLoad Balancing by the Java Dispatcher

Structure linkLoad Balancing for J2EE Web Applications

Structure linkRegistering Server Processes for HTTP Load Balancing

 

 

 

 

 

 

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