Apple Mac OS X Server v10.3 Instrukcja Użytkownika Pobierz pdf (Strona 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.

Load Balancing and Clustering

CHAPTER 5

Balancing User Load and Replicating Sessions

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Apple Mac OS X Server v10.3 Instrukcja Użytkownika Strona 48