当今电子商务发展进入了一个崭新的时代,特别是中国的企业,还将面临加入WTO后的激烈竞争。因此,企业对于IT设施的要求也变得越来越苛刻。一方面随着业务的增长,企业对于IT设施的计算能力、可靠性等性能的要求越来越高;而另一方面,由于竞争的压力,企业又必须大幅度降低IT基础设施的管 Nowadays, the development of e-commerce has entered a new era, especially for Chinese enterprises, and will face fierce competition after joining WTO. As a result, business requirements for IT facilities are also becoming more demanding. On the one hand, as the business grows, enterprises are demanding more and more of the computing power and reliability of IT facilities. On the other hand, due to the pressure of competition, enterprises must drastically reduce the cost of IT infrastructure