Why do enterprises build their own private clouds? According to Wen Xinrong, deputy general manager of Chinalco Information Department, there are four main reasons. First, the government has no relevant laws and regulations to operate the "cloud". Group enterprises generally have obvious competitors, important data and other information that needs to be kept confidential. If you use a public cloud, you can't be held accountable for data problems. Unlike power supply and water supply, the government has many regulations; Second, the billing standards of "cloud" operators are not uniform, and the traffic billing varies widely. Group enterprises need independent private lines, and there is no standard for who will bear the expenses, unlike the standardization of power supply and water supply. Third, there are few operators providing "cloud" services for group enterprises. Fourth, once the cloud service provider is changed, data migration is a big problem (data standard, large amount of data in group enterprises, etc. ). CIO chooses cloud computing to save time In a cloud computing discussion jointly sponsored by Intel and ITValue, a CIO who once deployed a cloud computing application platform within the company said that compared with deploying a non-cloud computing platform, the installation of software and hardware and system testing can save 10%- 15% of the project time. Through real-time online Webtraining, the training time of the application system can save 10%- 15% of the training time, and the maintenance of the later system does not need special personnel to manage, which can save 5%- 10% of the system management time. The difference between cloud computing and IT outsourcing Both cloud computing and IT outsourcing claim to save IT costs, but in the view of Ai Jun, secretary general of China Huarong Asset Management Company's informatization leading group, there are great differences between them. For example, many enterprises and government computing centers do not have disaster tolerance, and disaster tolerance is the standard configuration of the cloud. It can be seen that the cloud does not have to pay one-time physical environment construction cost and incremental maintenance cost, but is decomposed into annual cost, so it is cost-effective for enterprises. As far as the current outsourcing is concerned, many cases are about buying manpower, which only solves the problem of "replacing workers" rather than improving efficiency.