Load balance control method and load balance control apparatus in data-processing system

摘要

The delay of an ongoing configuration change process, which may result from resource insufficiency, is restrained to avoid a great difference between the actual load condition and the load condition predicted before a configuration change, and provide proper service arrangement. A load distribution control device distributes the requests received from client terminals to a plurality of server nodes in order to distribute the load on the server nodes. A configuration change device calculates necessary resource amounts when a configuration change involving a service-start or service-stop is to be made. The load distribution control device references a load management table and allocates necessary amounts of resources to a server node that requires the calculated resource amounts. Subsequently, the configuration change device effects the configuration change.