Enterprises choose cloud computing need to recognize the difference and difference of three kinds of service

Cloud Computing's three broad categories of services are different, enterprises in the choice of cloud computing should pay attention to distinguish between their differences. If you need more control over the service, the enterprise should choose the IaaS service. However, more control at the same time on the http://www.aliyun.com/zixun/aggregation/13597.html "> Enterprise IT Technical requirements are higher, because IAAS services the underlying hardware platform is managed by the service provider, but is the platform on which the client usually needs to manage. If you need to outsource as many IT services as possible, then the enterprise should choose the top tier SaaS service. Of course, if you choose this type of service, the enterprise's control of the service environment is very limited, and not all application requirements have a corresponding SaaS service.





providers of commercial cloud computing services are charged according to different circumstances, such as how many users are used, how much computing resources are used, what services are used, and so on. As with all services purchased, businesses need to be able to see the billing of all services, especially if the cloud computing services they use can dynamically expand resources. Most cloud computing service providers provide an application or interface to provide users with the specifics of resource billing. If a service provider is unable to provide similar information, the company may have problems choosing such a supply mulberry. Of course, another issue directly related to billing is the charging of services, enterprises need to do two comparisons. One is that the cost of direct service is compared with the expected service cost in one service cycle, and the other is the horizontal comparison of fees between different cloud services providers.

The standard compliance of cloud computing services affects customers in several ways. If cloud computing services support standards, then users can access them in a standard way. For example, Microsoft Windows Azure Platform storage Access is based on the standard rest method, so no matter what language users use what platform, can be based on rest to access these stores. On the other hand, the support of the cloud computing platform to the standard allows users to have a choice, and not completely locked in a specific cloud computing services.

Of course, different levels of cloud computing services to the user's degree of lock-in is not the same, in general, PAAs services are more locked than IaaS services, and SaaS services are more locked than PAAs services, but users need at least the ability to migrate or back up data from a cloud services platform.

Cloud computing Service Provider certification is also a very important research indicators, certification is a third party to the service provider a recognition and affirmation. There are some certifications associated with the IT system's transport and peacekeeping security, such as ISO/IEC 27,001:2,500. Some certifications are related to compliance, such as a SAS (Statement on Auditing standards) in the United States, and certification of audit guideline descriptions.

SAS70 Certification is a service provider of internal control and financial-related certification, so for cloud computing service providers This certification is particularly important. SAS70 certification was created by the American Institute of Certified Public Accountants, which consists of two levels. One is the first type of certification, through the enterprise itself to collect internal information, to the regulatory body to prove all the actions, control objectives, processes in line with the laws and regulations of the regulation. The second type of certification is more stringent, is the first type of certification on the basis of increased service regulators on the enterprise audit opinion. With these two certifications, companies can basically guarantee compliance with corporate concerns about cloud computing security in terms of laws and regulations and risk management.

(Responsible editor: The good of the Legacy)