Physical machines (physics -specific servers) and virtual servers are two different server architectures. They have some key differences, covering hardware, performance, flexibility, cost and management.

　　Hardware resource allocation:

　　Physics: Physical machines are actual hardware servers, with independent physical processors (CPUs), memory, hard disks and other hardware components. These resources belong to the physical machine and do not share with other servers.

　　Virtual server: Virtual server is a virtual instance created by virtualization technology on physical machines. Multiple virtual servers can run on the same physical machine to share the hardware resources of the physical machine.

　　Performance:

　　Physical machines: Because of independent hardware resources, physical machines usually provide higher performance. For tasks that require a large amount of calculation, memory or storage resources, physical machines may be more suitable.

　　Virtual server: The performance of the virtual server is affected by the sharing of physical machine resources and the virtualized layer. Although virtualization technology has been continuously improved, physical machines may still have advantages in some high -performance scenarios.

　　Flexibility and scalability:

　　Physics: Customization and expansion of hardware resources usually require the replacement or upgrade of physical servers, which are relatively time -consuming and complex.

　　Virtual server: Virtual servers can adjust resources more flexibly. By increasing or reducing the number of virtual machine instances, the flexible expansion and contraction of resources are achieved.

　　cost:

　　Physics: usually require higher costs, including hardware procurement, maintenance, power consumption and space costs.

　　Virtual server: Usually more cost -effective, because multiple virtual servers share the same physical machine, improve resource utilization and reduce hardware costs.

　　Management and maintenance:

　　Physics: Hardware maintenance and management are more independent and require more manual intervention. Upgrading hardware or repair may cause the server to stop.

　　Virtual server: Through virtualized management tools, resource monitoring, adjustment and management can be more convenient. The migration and backup of virtual machines are also more flexible.

　　Isolation:

　　Physical machines: There are higher isolation between different applications on the physical machine and services, but once the hardware fails, the entire server may be unavailable.

　　Virtual server: The isolation of virtual server is relatively low, but virtualization technology usually provides a certain degree of isolation. Failure between virtual machines usually does not affect other virtual machines.

　　When choosing a physical machine or virtual server, weighing decisions must be made according to specific needs, budget and management capabilities. In many cases, the two may be used in combination to build a hybrid cloud environment to give full play to their respective advantages.