What is a private cloud? What are the characteristics?

What is a private cloud? Refer to Wikipedia's definition:

Private cloud is to build cloud infrastructure and software and hardware resources in the firewall, so that all departments in an organization or enterprise can enjoy the resources of the data center. Private Cloud A cloud infrastructure that operates entirely for a specific organization. The manager can be the organization itself or a third party. The location may be inside or outside the organization.

What are the characteristics and requirements of private cloud? Private cloud not only requires scalability and flexibility in resource delivery, but also poses a greater challenge: the overall scheme ranges from planning and deployment to delivery and operation and maintenance. The main values and requirements are as follows:

On-demand investment: According to the actual needs of the business, on-demand investment of different levels and scales can be carried out. For example, the IaaS layer and PaaS layer are built in stages, and the IaaS layer management platform and resource pool are built separately, and the resource pool is gradually expanded according to business conditions;

Fast online: private cloud can meet the demand of rapid delivery of enterprise resources, and support the automatic deployment and convenient online expansion of business systems;

Simple operation and maintenance: In the private cloud scenario, enterprises are both users and operators, and the operation and maintenance personnel are very limited. Therefore, the operation and maintenance of the private cloud should be as simple as possible, and the complexity of the system should not be greatly increased with the expansion of the system scale. This can prevent complex operation and maintenance from becoming the bottleneck of rapid business growth and bringing hidden dangers to the stability of the system;

Production Readiness: When users transform private clouds, they usually only pay attention to functional features, ignoring the goal of "cloudization" transformation of enterprise data centers when only private clouds ultimately carry production business. Therefore, the "production-ready" ability of solutions and even supplier services can ensure the continuous and in-depth transformation of the architecture, rather than just staying in the experimental stage;

Reasonable cost: all the transformation ultimately needs to be measured by economic benefits. Private cloud solutions need to pay attention not only to procurement costs, but also to use costs, maintenance costs, software and hardware maintenance and upgrade costs.