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Application Migration and Development Guide
Application Development with PAS for OpenEdge : Design and Implementation Considerations : Primary performance considerations : Using load balancing
Using load balancing
For a session-free application with a large client load, you might want to use a Domain Name System (DNS) load balancing service to distribute client requests among several identical PAS for OpenEdge instances hosting the same OE ABL Web application. You typically connect to the DNS through a port that is configured to accept requests for your Web application hosted on these instances. The DNS then distributes client requests depending on the load balancing model that is used. Some DNS systems consider the actual client load reported by each server (PAS for OpenEdge instance) that services client requests, or like Apache Camel, allow you to configure access to servers (endpoints) according to one of a variety of load balancing policies. For more information, see the documentation for a given DNS load balancer.