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Type 1 and Type 2 Virtualization

Introduction:

Virtualization is defined as the use of virtual resources such as storage, networking, memory etc. With the advent of virtualization technology, [1] the use of hypervisors became very common. A hypervisor is also known as a Virtual Machine Monitor (VMM) and depending upon its use in virtualization, the virtualization can be divided into the following two types:

➢      Type 1 Virtualization

➢      Type 2 Virtualization

In this article, we will discuss Type 1 and Type 2 virtualization, the comparison between Type 1 and Type 2 virtualization, pros and cons of Type 1 and Type 2 virtualization and finally, we will talk a little about StarWind HyperConverged Appliance. [2] [3] 

Type 1 and Type 2 Virtualization:

Type 1 virtualization is defined as that type of virtualization in which the hypervisor runs directly on the physical machine’s hardware. Once you manage to run your Type 1 hypervisor, you can create as many virtual machines on it as your hardware capacity allows you to. These virtual machines can have either the same Operating System or different Operating Systems.

On the contrary, Type 2 virtualization is that type of virtualization in which the hypervisor runs on a host Operating System. This adds an additional layer between the interaction of the hypervisor and the physical machine’s hardware. However, you can still create multiple virtual machines on the Type 2 hypervisor.

Comparison between Type 1 and Type 2 Virtualization:

Type 1 virtualization is also known as bare metal or native virtualization because of the direct interaction between the hypervisor and the physical machine’s hardware whereas Type 2 virtualization is also known as hosted virtualization because of the involvement of the host Operating System. Type 1 virtualization is used for the environments, which need high-performance efficiency whereas Type 2 virtualization is suitable for the [4] situations, which require less performance efficiency. Type 1 virtualization is completely independent of the host Operating System whereas Type 2 virtualization is entirely dependent on the host Operating System.

Pros and Cons of Type 1 Virtualization:

The advantages of Type 1 virtualization are as follows:

➢      Better performance

➢      Enhanced flexibility

➢      High efficiency

➢      A greater level of security and availability[5] [6] 

The disadvantages of Type 1 virtualization are as follows:

●       Type 1 virtualization is possible only if your hardware is compatible with your hypervisor

Pros and Cons of Type 2 Virtualization:

The pros of Type 2 virtualization are as follows:

➢      Easier system configuration and management due to the presence of a native host Operating System

➢      Hardware dependency is eliminated

The cons of Type 2 virtualization are as follows:

●       Poor performance as compared with Type 1 virtualization

●       Exposure to security threats

●       Limited availability

●       If the host Operating System fails, all the guest Operating Systems will also fail

StarWind HyperConverged Appliance:

StarWind has designed its HyperConverged Appliance for the organizations who wish to minimize the application downtime but are limited on IT team resources or the budget. Unlike the traditional converged infrastructure, HyperConverged Appliance is a completely software-defined platform.

Hyperconvergence integrates all the IT components together such as computation, storage, networking etc. This approach reduces the hardware dependency, which was earlier considered as a major flaw of Type 1 virtualization.

Conclusion:

In this article, we studied about the two basic types of virtualization based upon the usage of the hypervisor. We discussed how these two types of virtualization differ from each other. After that, we stated the pros and cons of each type of virtualization followed by the description of StarWind HyperConverged Appliance. We found out that Type 1 virtualization is far better than Type 2 virtualization in many ways but there was a major flaw associated with Type 1 virtualization and that was the strong hardware dependency, which can lead to certain compatibility issues. However, StarWind HyperConverged Appliance has even resolved this issue by integrating all the IT resources together thus removing all the dependencies.

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