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Three-tier model is the most popular architecture in current application information system. It is an important issue that the performance will be effected significantly under heavy load. Moreover, for the traditional system, it restricted the concurrent internet user due to resource limitation.. We propose a model, called worker/service threads. Our model has two stages. In the first stage, an agent response to connect to the internet user, the stage allow more user connect to the system at the same time. At the second stage, we provide a dynamic resource allocation model. The model can improve the resource utilization base on system status. The proposed model has been applied in Nan Hwa university and show the approach run efficiency
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