[Cloud Computing]Mechanisms: Hypervisor-优快云博客

本文介绍了Hypervisor作为虚拟化基础设施核心组件的作用及其限制，包括如何直接安装于裸金属服务器上并提供硬件资源的控制、共享及调度等功能。此外还概述了多种与Hypervisor相关的模式和技术。

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Hypervisor

The hypervisor mechanism is a fundamental part of virtualization infrastructure that is primarily used to generate virtual server instances of a physical server. A hypervisor is generally limited to one physical server and can therefore only create virtual images of that server (Figure 1). Similarly, a hypervisor can only assign the virtual servers it generates to resource pools that reside on the same underlying physical server. A hypervisor has limited virtual server management features, such as increasing the virtual server’s capacity or shutting it down. The VIM provides a range of features for administering multiple hypervisors across physical servers.

Figure 1 - Virtual servers are created via individual hypervisors on individual physical servers. All three hypervisors are jointly controlled by the same VIM.

Hypervisor software can be installed directly in bare-metal servers and provides features for controlling, sharing and scheduling the usage of hardware resources, such as processor power, memory, and I/O. These can appear to each virtual server’s operating system as dedicated resources.