Oracle Audio Technologies Application 9i - Manual (Page 69)

Configuring the Personalization Portal for Load-Balancing
Multiple JVM Support and Load Balancing 5-9
5.5 Load Balancing
When multiple instances are running, load balancing can be performed by a
separate machine. For example, there could be several Oracle HTTP Server
instances, each with a set of JServ instances balanced on a one-to-many basis by this
machine. The Oracle HTTP Server instances can perform load balancing by using a
hardware load balancer in front of the Oracle HTTP Server instances.
The main purpose of multiple JVM support in Wireless Edition is to provide
scalability through load-balancing. There are three implementations when setting
up load-balancing.
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Load-balancing among Oracle HTTP servers through hardware load-balancing.
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Load-balancing among Jserv instances with cookies.
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Load-balancing among Jserv instances with URL rewriting.
5.5.1 Load-Balancing with Cookies
When intermediate gateways or proxies and the clients support cookies, load
balancing can be achieved using cookies:
1. Set the enable.http.session.binding parameter in all of the System.properties
files (on all machines, if more than one machine is involved) to true.
2. In the ORACLE_HOME\Apache\JServ\conf\zone.properties file set the
session.useCookies parameter to true.
5.5.2 Load Balancing Through URL Rewriting
When intermediate gateways or proxies do not support cookies, load balancing can
be achieved through URL rewriting:
1. Set the enable.http.session.binding parameter in all of the System.properties
files (on all machines, if more than one machine is involved) to true.
2. In the ORACLE_HOME\Apache\JServ\conf\zone.properties file set the
session.useCookies parameter to false.
5.6 Configuring the Personalization Portal for
Load-Balancing
This section describes the configuration of the Personalization Portal in two
environments: