In the IT industry there are so many buzz words used by professionals that it’s hard to keep up. One of the most popular words used is “virtualization. ”
Before delving into the various types of virtualizations, it is important to understand the concept of virtualization and how this solution can revamp the IT industry.
What is Virtualization – Virtualization is a broad term that refers to computer resources. Virtualization hides the physical characteristics of computer resources which are configured on a single device or server.
- Client/Desktop/ Application
Let’s define each virtualization and show the benefits and limitations of each.
Server – Configured on one physical machine that is divided into many virtual servers. Some types of virtual servers include Windows, Linux, or other operating systems.
- Reduced Hardware – Only one machine is needed, eliminating multiple servers, and wiring.
- Access – Easy for programmers and technicians to access operating systems without installing on individual desktop computers.
- Administration/Training – Server maintenance may require training and familiarity of hardware and software for administrators.
- Licensing Cost – Software licensing is sold in single packages. For example, running 4 copies of Windows on a virtual machine requires 4 separate licensees. This could drive costs up.
- Performance – Resources such as RAM and CPU on a physical machine run much slower causing slow response time.
Application and Desktop
Application -Application virtualization is the technique of separating the applications. It enables applications to run on PCs without actually being installed on them, and to be administered from a central location.
- Management – Applications can be managed and patched from a central location.
- Legacy Support – Legacy applications can run on newer operating systems that they were not originally designed for.
- Access – Applications can be installed on demand from central locations.
- Packaging – Applications must be packaged (bundled) before they can be used.
- Resources – Applications may require more computer resources (storage, CPU, and RAM).
- Compatibility – Not all applications can be virtualized easily.
Desktop – Desktop virtualization is considered a type of client-server computing model because the “virtualized” desktop is stored on a centralized, or remote, server and not the physical machine being virtualized.
- High Availability – Down-time can be minimized with replication and fault- tolerant hosted configurations.
- Multiple Desktops -Able to access multiple computers suited for various tasks from the same computer.
Limitations – Similar to server virtualization technology plus, clients must have network connectivity to access virtual desktops.
Network – Network virtualization is the process of combining hardware and software network resources and network functionally into a single software based entity. Some examples are a virtual private network (VPN), and virtual LANS or VLANS.
- Customization – Administrators can quickly customize network options for specific needs.
- Consolidation – Physical networks can be combined into one virtual network for simplification of management.
Limitations – Similar to server virtualization technology.
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I have worked is various positions as a system administrator, support technician, as a help desk support, and as an IT consultant in a corporate environment. I currently run a small business where I provide computer services such as hardware configuration, installation, for residential and for medium and small businesses. You can contact me by email or visit my website at https://www.mdsystemsolutions.com.