03 Types of Hypervisors || Hypervisors || Virtualization || #hypervisor

Summary

This video explains the differences between Type 1 and Type 2 hypervisors. Type 1 hypervisors, also known as bare-metal hypervisors, run directly on physical servers, providing direct access to hardware for virtual machines. Examples include VMware ESXi, Microsoft Hyper-V, and Citrix XenServer. Type 2 hypervisors, on the other hand, run on top of an existing operating system like Windows or macOS, with virtual machines operating within them. While Type 1 hypervisors are typically used in data centers, Type 2 hypervisors are more common for personal or small-scale use.

Takeaways

• 😀 Type 1 hypervisor is also known as a bare-metal hypervisor, as it is installed directly on a physical server without any underlying operating system.
• 😀 With Type 1 hypervisors, such as VMware ESXi, Microsoft Hyper-V, and Citrix XenServer, the hypervisor has direct access to the physical hardware.
• 😀 Type 1 hypervisors are typically used in data centers where multiple virtual machines (VMs) need to run efficiently on a physical server.
• 😀 A physical server with a Type 1 hypervisor allows the creation and management of virtual machines directly on the hardware without needing an additional operating system in between.
• 😀 Type 2 hypervisor is installed on top of an existing operating system, such as Windows or macOS, rather than directly on the physical hardware.
• 😀 Popular Type 2 hypervisors include VMware Player, VMware Workstation, and Parallels for Mac, which allow users to run multiple VMs on top of their host operating system.
• 😀 In Type 2 hypervisors, the virtual machine accesses the hardware through multiple layers: VM > Hypervisor > Host OS > Physical hardware.
• 😀 Type 2 hypervisors are often used on personal computers for tasks like testing or running software in isolated environments, rather than in data centers.
• 😀 The main difference between Type 1 and Type 2 hypervisors is the direct access to physical hardware (Type 1) versus reliance on the host OS (Type 2).
• 😀 Type 1 hypervisors provide better performance and are more suitable for enterprise-level, large-scale virtualization compared to Type 2 hypervisors.

Q & A

What is a Type 1 hypervisor?

A Type 1 hypervisor, also known as a bare-metal hypervisor, is installed directly on a physical server, allowing multiple virtual machines (VMs) to run on top of it. It operates directly on the hardware of the server, providing virtualization capabilities.

What are some examples of Type 1 hypervisors?

Examples of Type 1 hypervisors include VMware ESXi, Microsoft Hyper-V, and Citrix XenServer. These are commonly used in data centers and enterprise environments.

How does a Type 1 hypervisor interact with hardware?

A Type 1 hypervisor has direct access to the physical hardware, which it can then allocate to virtual machines, providing efficient and direct virtualization.

What is a Type 2 hypervisor?

A Type 2 hypervisor, also known as a hosted hypervisor, runs on top of an existing operating system (OS) like Windows or Mac. It does not have direct access to the hardware and relies on the OS for hardware interaction.

Can you provide examples of Type 2 hypervisors?

Examples of Type 2 hypervisors include VMware Player, VMware Workstation, and Parallels for Mac. These are typically used for personal or development environments, not data centers.

How does a Type 2 hypervisor differ in architecture compared to a Type 1 hypervisor?

In a Type 2 hypervisor setup, the virtual machine is running on top of the hypervisor, which in turn is running on top of an existing operating system. This means the VM must go through multiple layers, such as the host OS, before accessing the hardware. In contrast, a Type 1 hypervisor interacts directly with the hardware, reducing the layers of interaction.

Why would someone choose a Type 1 hypervisor over a Type 2 hypervisor?

A Type 1 hypervisor is typically chosen for production environments, such as data centers, because of its direct access to hardware and more efficient management of resources. It offers better performance, scalability, and reliability for running multiple VMs.

What is the main disadvantage of a Type 2 hypervisor?

The main disadvantage of a Type 2 hypervisor is its reliance on an underlying operating system. This can result in lower performance and less efficient resource allocation compared to Type 1 hypervisors, which have direct access to hardware.

Are Type 2 hypervisors suitable for data centers?

No, Type 2 hypervisors are generally not used in data centers. They are more suitable for personal use, development environments, or testing scenarios where performance and scalability are not as critical.

What is the process for installing a Type 1 hypervisor?

To install a Type 1 hypervisor, you would typically purchase a physical server, then install the hypervisor directly onto the server, either through a CD drive or bootable USB. The hypervisor then runs directly on the hardware, enabling you to create and manage virtual machines.