Portals > Load Balancing Overview

The Portals > Load Balancing page allows the administrator to configure back end Web servers for a load balanced deployment. This default landing page for the load balancing feature allows the administrator to configure load balancing groups, and lists general properties of any existing load balancing groups.

NOTE: This feature also requires a Load Balanced Portal with virtual host to be configured in the Portals > Portals page.

Figure 27. Portals > Load Balancing Page

Configuration Scenarios

Load Balancing for SRA SRA is a robust feature that has multiple uses, including:

Balancing a Farm of Web Servers – This is useful when the SRA appliance with a higher horse power is offering protection and balancing the load of a relatively low powered farm of Web servers. In this case, Web Application Firewall, URL rewriting and other CPU intensive operations are enabled on the Load Balancer.

Balancing a Low-Powered Cluster – A relatively low powered SRA cluster can be balanced for improved scalability. In this case, Web Application Firewall, URL rewriting, and other scalable features are enabled on the low powered SRA appliances.

Load Balanced Pair – In this scenario, the Load Balancer may have one portal configured for the front-end, and another Application Offloading portal configured to act as a Virtual Backend Server. This Virtual Backend Server and the second SRA device are configured as the Load Balancing Members and also take up the load of the Security Services. The Load Balancer in the previous two scenarios is essentially a dummy proxy without the load of any Security Services to burden it.

Load Balancing Settings

The following table lists Portals > Load Balancing configuration options. Additional per-group configuration options are described in Configuring a Load Balancing Group .