Virtualization is a technology that lets you create useful IT services using resources that are traditionally bound to hardware. It allows the user to make use of the physical machines fully by distributing its capabilities among many users or environments.
There are three ways in which virtual servers can be created. Full virtualization, para-virtualization and OS-level virtualization.
Pros of Virtualization
- It decreases the cost
Virtualization decreases the cost by reducing the need for physical hardware systems. It lowers the quantity of hardware hence reducing the cost.
- It allows division of service
As it uses a single server, there is a possibility of dividing service. The applications can be put in separate environments hence not easy for the applications to crash with each other.
- Shifting all local infrastructure to cloud within a day
If the user decides to shift the virtualized infrastructure to the cloud can do it within a day. This is because the hypervisors offer a tool to transfer the infrastructure.
- There is no data loss
The data may be lost while testing or installing something on the server. It can easily be retrieved by reverting to a previous snapshot and forward as if the mistake did not happen.
- Saves space in the server room
When the server is virtualized it helps the user reduce the space he uses as the virtualized server is able to hold many servers at one time.
- It is too fast
When someone has virtualized his or her servers can clone an image too fast. The user does not have to fill purchase order, wait for shipping before receiving.
- It saves energy
Virtualized machines reduce carbon footprint and help to clean up the air we breathe. This reduces pollution of the air and makes it a conducive way of working.
- It increases availability
Virtualization offers a number of advanced features that are not found on physical servers. This increases uptime and availability.
- Recovery of disaster
When the servers are virtualized, it is easier to recover disaster. An organization can easily create an affordable replication site. In case a disaster strikes the server room the virtual machines can be moved somewhere else.
- Increase IT productivity
The productivity of IT is greatly improved when the machines are virtualized as the users will be able to work without fearing that their data may be lost since it can easily be recovered.
Read More: Pros and Cons of Internet Censorship
Cons of Virtualization
- Hiring of expertise
When an organization needs to virtualize its machines, then it will require expertise in the field of IT who will ensure that the machines have been virtualized. This may be an extra cost to an organization.
- Some applications do not adapt well to a virtualized environment
Some applications will work similarly to the applications that are in a non-virtualized environment hence it will not be useful to an organization to virtualize its machines.
- Licensing of the software
Most software vendors adapt to the increased adoption of the virtualized environment. Although it is important to check with the vendors if their software can be used in a virtualized environment.
- It is an extra cost
Additional hardware may be required in order for the machines to be virtualized. This may be an extra cost to an organization as it will have to purchase for the additional hardware.
- It creates security risks
As data is very important in a company it is mostly targeted. There are high chances of experiencing data breach when the machines have been virtualized as they will be using one server.
- An organization should be connected to their data within the extended time
If an organization will not be able to connect within that time then they will have to struggle to compete in their industry. This is because the ability to stay connected does not lie in their hands.
- Not good for small businesses
When a business is already large it can protect its resources for it not to be taken away by other businesses unlike when it is small its resources may easily be taken away.
- It requires a lot of time
During implementation, it takes little time but when working with it takes a lot of time as compared to the local systems.
Read More: Pros and Cons of Digital Heath Records
Virtualization can be a useful tool for individuals and organizations when it is used properly. Adding new servers can cause a problem thus affecting the whole system. The users need to stay disciplined and awareness of communication issues.