Cloud Server Model
The Microsoft adCenter Keyword Services Platform server farm provides a scalable platform for keyword technologies. Each server in the farm can have different configuration to suit a variety of service providers and stored procedures. A dynamic service load balance server, a cloud server, is the hub of the KSP server farm. When a KSP server is added to the server farm via the cloud server, all available keyword service providers and stored procedures are dynamically discovered and registered with the server. Any changes in the availability of the KSP server, as well as all its running service providers and stored procedures, are discovered and registered automatically with the server.
The cloud server distributes accesses to services running on a KSP server farm through its load balancer provider. The default implementation of the load balancer provider uses a round-robin scheduling approach. Over time, the server accumulates usage patterns and statistics of various service providers and stored procedures running on each KSP server in the farm. This information is used by the server to determine how to automatically deploy additional service providers and stored procedures. For example, if the Keyword Forecast provider is being used heavily in the server farm and the providers running on machine "A" are used lightly, the server will automatically deploy the Keyword Forecast provider to machine "A" and route requests to that machine to balance the load for the Keyword Forecast provider.
When a client application calls a service provider or stored procedure through the server, a KSP server with a matching service provider or stored procedure is selected by the load balancer provider, and the request is routed to the appropriate KSP server. If a server, service provider, or stored procedure in the KSP server farm is unavailable, it will be taken out of rotation by the load balancer automatically.
Read more about this topic: Keyword Services Platform
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