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Enabling Load Balancing
To activate load balancing, set the RESOURCES section parameter LDBAL to Y. A load factor is assigned to each service performed (via the LOAD parameter) and the BEA Tuxedo system keeps track of the total load of services that each server has performed. Each service request is routed to the server with the smallest total load. The routing of that request causes the server's total to be increased by the LOAD factor of the service requested.
Load information is stored only on the site originating the service request. It would be inefficient for the BEA Tuxedo system to make continuous attempts to propagate load information to all sites in a distributed application. When performing load balancing in such an environment, each site knows only about the load it originated and performs load balancing accordingly. This means that each site has different load statistics for a given server (or queue). The server perceived as being the least busy differs from site to site.
When load balancing is not activated, and multiple servers offer the same service, the first available queue receives the request.
Characteristics of the LDBAL Parameter
The LDBAL parameter has the following characteristics:
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