The biggest drawback of virtualization is that it has a breakdown point. When a machine, on which every virtualization solution is running, crashes or when the virtualization solution itself crashes, it will crash everything. This sounds scary but in fact this risk is relatively easy to prevent. Increasing capacity and regularly backing up virtual operating systems is a way to reduce the risk of data loss and single point of failure.
Virtualization server requires powerful machines. Virtualization can save money because it requires less hardware and this allows to limit the number of physical machines in an enterprise but it does not ensure to run new virtual fire solutions. If the used machine is not strong enough, virtualization server can still be deployed, but when there is not enough CPU and RAM power for them, it will actually interrupt the work.
What is virtualization technology?
Virtualization technology is designed to create an intermediate layer between computer hardware and software running on it. Most commonly, server virtualization technology, from a single physical machine can form many independent virtual machines (VPS). Each VPS virtual machine has its own set of system resources, operating system and applications. However, in the last few years, the virtual cloud server was created from a virtualized infrastructure formed by many physical servers.
Virtualization technology is derived from disk partitioning, dividing a real drive into multiple virtual drives. In the 1990s, it was mainly used to reconstruct the user environment directly on a piece of large hardware. If an IT administrator wants to run a new software and wants to see how it works on different operating systems like Windows NT and Linux, he needs virtual technology to create another user environment.
Disadvantages of virtualization server
Virtualization server is the most effective way to reduce costs for IT infrastructure while increasing efficiency and flexibility not only for large enterprises but also for small and medium enterprises. It also gives some following disadvantages:
- Virtualization can lead to low performance: Even if the machine on which virtual operating systems and applications are running is strong enough, the performance problem is still possible. One of the real problems is that an application when running on a virtualized environment works well but has problems running on a virtualized system. For example: The performance of stress test in a virtualized environment has very different results when compared to stress test on a dedicated machine. The best thing to do when deploying on a virtualization platform is to always check and closely monitor potential problems.
- Virtualization applications are not always available: While in most cases it is not possible to accurately predict whether a particular application can work well when virtualized or not. There are other applications, through practical practice, there is a decrease in performance when they are virtualized.
- High physical error risk: It is great for storing and running up to your very 5 important virtualization servers in just one physical server. But did you ever imagine the conflict of these 5 virtualization servers just because of a hardware failure in the Physical Server? It will put all your important servers in offline status. It is obviously a major drawback and limitation of virtualization that needs to be considered when planning a virtualization server.