First, the definition of cloud computing
1, Cloud computing is a mode of use
2, using the method: must be used by the network
3, is an elastic computing capacity on demand with rapid expansion
Second, the classification
1, public cloud: each service provider is committed to providing the infrastructure to any users and businesses.
Pros: the economic costs can increase flexibility, capacity on demand with appropriate costs.
Disadvantages: poor security.
2, private cloud: The cloud service is only a service organization, managed and maintained by the organization or a third party.
Advantages: security guarantee; more flexible.
Disadvantages: the deployment of more trouble, have their own facilities.
3. Hybrid cloud: the cloud services provided by public and private clouds mixed composition, the use of private cloud security addresses the problem of internal security of important data, and based on the scalability of the public cloud can always get more computing power, while costs effectively reduced.
Third, stratified
1, Paas (platforms and services)
Supplier Management: Network Networking, storage Storage, Services Servers, virtualization Vit \ rtualization, operating system O / S, middleware Middleware, runtime Runtime
To manage: Code Data, the code scenarios Applications
2, Iaas (infrastructure and services)
Supplier Management: Network Networking, storage Storage, Services Servers, virtualization Vit \ rtualization
Self-management: the operating system O / S, middleware Middleware, runtime Runtime, Code Data, the code scenarios Applications
3, Saas (software and services): All supplier management