Virtualization

What are two important aspects of Type 2 hypervisors?

1) The hypervisor is competing for hardware resources with all the other running applications on your computer. 2) the hypervisor does not have direct and unrestricted access to the physical hardware but instead must send all your VMs hardware requests through your computer's operating system.

What is a hypervisor?

A software tool used to host virtual systems, like a layer of system software between computer hardware and virtualized systems. Hypervisors can be used to control and manage access to hardware resources by one or more virtual systems.

Hypervisor

A special type of software that creates the virtual hardware for devices, or in other words, create the illusion of physical hardware. The virtual hardware is such an elaborate and convincing illusion that you can actually install a real operating system within the Virtual Machine, and it works as if it had been installed on physical hardware.

The hypervisor serves as a resource traffic cop in that it manages how each Virtual Machine . . .

Accesses and consumes the physical hardware resources, such as CPU, RAM, networking, and storage.

What is a disadvantage of a Type 2

Degraded performance within your Virtual Machines.

What are some differences between Type 1 and 2 Hypervisors?

Differ in the way that they are installed. Type 1 are installed on dedicated bare metal server, while Type 2 are installed as an application within your existing computer's OS. Another important difference between the hypervisors is in how you access and manage the host and the guest. Type present very little information to the console screen of the host computer.

The hypervisor provides the Virtual Machine (and the guest OS), access to the . . .

Physical CPU and RAM resources, as well as access to the virtual disk that the guest OS believes is a real, physical hard drive.

Type 2 (hosted) hypervisor

Sometimes referred to as host hypervisor. It is installed as an application on personal computers, allowing the user to run different virtual machines that all share the laptop or computer's hardware resources. One important aspect of Type 2 hypervisors is that they are installed and run as regular applications on your computer.

The Operating System on installed with in the Virtual Machine is often referred to as. . .

The "guest" OS as to differentiate it from the operating system of the underlying physical computer, which is called the host OS. With few exception, the guest OS will behave in the same way it would if it had been installed directly on the physical hardware.

Virtualization

The technique of converting hardware-based resources into software.

Two types of hypervisors:

Type 1 (bare metal) Type 2 (hosted)

Type 1 (bare metal) hypervisor

Type 1 hypervisors are operating systems that natively run virtual machines and are intended to be installed on a dedicated bare metal server. Type 1 hypervisors have complete access to the underlying hardware of the physical computer.

Many IT professionals use a Macbook Pro for personal computing at home, and work remotely. Sometimes they need a Microsoft Windows application for work. Rather than buy another laptop, the IT team from the office can install a Windows environment that can run Windows applications on a MacOS. What kind of software will the IT team need to install on a Mac to enable it to run this Windows environment?

Type 2 Hypervisor. A type 2 hypervisor is installed as an application within another operating system environment that allows the use of virtual machines from within that same environment.