Installation guide

Configuring Web Load Balancer Using

XML

A Load Balancer works as a web-request dispatcher, distributing the web requests across a

set of Web/J2EE Cluster nodes. In advanced configurations, it distributes the web requests

even across non-cluster server instances and multiple vendor’s servers. Load Balancing for

EJB clusters is done at the container level and does not need any external configuration.

A Load Balancer is a variant of Web node. The steps involved in setting up a Load Balancer

are:

1 The DIR and the config files have to be setup just as one would do for a Standalone

instance.

2 Copy the server-config.xml and web-lbconfig.xml into the config DIR

3 Enable the Load Balancer in web-config.xml

<request-dispatcher enabled="true" name="web-lbconfig.xml"/>

4 Configure the Load Balancer properties in web-lbconfig.xml. The nodes are

referenced by their name:

<node name="first" type="pramati" host="localhost" web-

port="8484">

<naming-port>9494</naming-port>

<socket-pool min="20" max="50" idle-time-out="1000"/>

</node>

You can also configure node chooser and node group information from web-

lbconfig.xml. For more information on node chooser, node group and failover refer to

the Technical Reference document.

The following table lists all the parameters for configuring a Web Load Balancer:

Table 13: Dispatcher Configuration Parameters

Tag Attribute Option Description

node

name A unique name specifying the node

type Type of cluster

host Host name

web port Port where the node listens for requests

socket pool (min) Minimum socket pool size

socket pool (max) Maximum socket pool size