Apple Mac OS X Server v10.3 - Manual (Page 48)

Figure 5-1 The WebApp window of the petstore.ear archive
Load Balancing and Clustering
Load balancing provides a way to distribute user load among application servers. Clustering enables
session failover when a node in a cluster becomes unavailable. Load balancing can be used with a
group of standalone application servers or with a cluster or application server or nodes. This section
describes a simple, three-computer setup in which one computer runs the web server and balances
user load among two application servers.
Start by stopping the Web service on the web-server computer and the application servers on the
nodes. Then follow the steps described in the following sections.
Enable Load Balancing in the Web Server
Follow these steps to configure a computer as the web server and load balancer for a deployment:
1. Launch Server Admin, if it’s not already running.
2. Select Web in the Computers & Services list, and click Settings in the configuration pane.
3. Click the Modules tab and select “jk_module,” which is at the bottom of the modules list.
4. Click the Sites tab.
48 Load Balancing and Clustering
2005-08-11 | © 2003, 2005 Apple Computer, Inc. All Rights Reserved.
C H A P T E R 5
Balancing User Load and Replicating Sessions