After the development of 34 years, the Internet has become a indispensable part of human society. Meanwhile, the network infrastructure is playing an increasingly important role in the success of a business. As the increasing demand for the network, and the expanding of enterprise's business, the company image, customer satisfaction, even the market share are all intertwined with the consistent availability of a company's web site. Therefore, the company's e-commerce site must offer a high perfo...