In an environment with multiple iAS installations, incoming requests first pass through the Load Balancing System. The Load Balancing System directs the request to the server best suited to process it. The Load Balancing System includes a Load Monitor and a Load Balancer. Request Management System Incoming requests are handled by the Request Management System. The Request Management System enables the simultaneous processing of a high volume of requests.
System administrators can configure thread pool parameters for optimal request processing.
From this pool, a thread is assigned to process the request. The Queue Manager gets involved when requests must be queued until a thread becomes available. The Queue Manager manages the list of pending requests and descriptive information. This information includes things such as the unique request ID and a request's current processing status, such as waiting , in process, finished , and so on. Request Logging, if enabled by the system administrator, keeps an information log of web server requests in a back-end database or in log files.