What are the core technologies of cloud computing server virtualization?

The core technology of cloud computing server virtualization, CPU virtualization: CPU virtualization abstracts physical CPU into virtual CPU, and a physical CPU can only run the instructions of one virtual CPU at any time.

Memory virtualization: Memory virtualization technology manages the real physical memory of a physical machine in a unified way, and packages it into multiple virtual physical memories for several virtual machines, so that each virtual machine has its own independent memory space.

Device and I/O virtualization: Device and I/O virtualization technology manage the real devices of physical machines in a unified way, package them into multiple virtual devices for use by multiple virtual machines, and respond to the device access request and I/O request of each virtual machine.

Network virtualization: Network virtualization is a process of integrating multiple hardware or software network resources and related network functions into one available software for unified management, and the realization of network environment is transparent to network applications.

Real-time migration technology: Real-time migration technology is to completely and quickly migrate the running state of the whole virtual machine from the original host hardware platform to the new host hardware platform during the running of the virtual machine. The whole migration process is smooth and users will hardly notice any difference.

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