The host is a physical computer or server running a virtual machine hypervisor. It is responsible for managing physical resources, creating virtual machines, and providing a hardware abstraction layer and management functions. Benefits include resource efficiency, isolation, flexibility, and cost savings.
What is a host?
The host machine, also known as the parent machine or base system, refers to the underlying physical computer or server running the hypervisor.
Detailed description:
The host acts as the basis of the hypervisor and is responsible for the following main tasks:
- Manage physical Resources: The host manages and allocates physical resources, such as CPU, memory, storage, and network connections, for use by virtual machines.
- Create and run virtual machines: The host creates and runs virtual machines on itself, providing an isolated execution environment for each virtual machine.
- Provide hardware abstraction layer: The host provides a hardware abstraction layer, allowing the virtual machine to access the underlying physical hardware while shielding the complexity of the hardware.
- Provide management functions: The host usually provides management tools that allow administrators to control and configure virtual machines, hypervisors, and underlying hardware.
Common types of hosts:
- Physical servers: Traditional physical servers can be used as hosts and run directly Hypervisor.
- Cloud server: The server provided by the cloud service provider has a hypervisor pre-installed to facilitate the deployment of virtual machines in a cloud environment.
- Hypervisor Server: A server dedicated to running a hypervisor, typically with high-performance hardware and redundant components.
Advantages of the host:
Using the host can bring the following advantages:
- Resource efficiency: Allows multiple virtual machines to run on one physical server to improve resource utilization.
- Isolation: Virtual machines are isolated from each other, and failures will not affect other virtual machines or hosts.
- Flexibility: Virtual machines can be easily created, deleted, and migrated as needed.
- Cost Savings: Eliminates the need for multiple physical servers, reducing hardware costs.
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