Virtualization

Virtualization

1. Advantages

   • It is cheaper.
   • It keeps costs predictable.
   • It offers a better uptime.
   • It reduces the workload.
   • It allows for faster deployment of resources.

2. Virtualization refers to the creation of a virtual resource such as a server, desktop, operating system, file, storage or network.

3. Disadvantages

   • Security
   • Availability
   • Scalibity
   • Implementation

4. Types of Virtualization

   • Desktop virtualization
   • Network virtualization
   • Storage virtualization
   • Data virtualization
   • Application virtualization
   • Data center virtualization
   • CPU virtualization
   • GPU virtualization
   • Linux virtualization
   • Cloud virtualization

5. Hyperviser

   • Type 1 or “bare-metal” hypervisors interact with the underlying physical resources, replacing the traditional operating system altogether. They most commonly appear in virtual server scenarios.
   • Type 2 hypervisors run as an application on an existing OS. Most commonly used on endpoint devices to run alternative operating systems, they carry a performance overhead because they must use the host OS to access and coordinate the underlying hardware resources.

6. Challanges

   • Depleted resources—performance and availability suffer
   • OS virtualization doesn’t virtualize the application
   • The virtual solution costs more than the physical problem
   • Unused virtualization features for example the network limits implementation
   • Overrun storage network
   • Congested storage network
   • Management complexity—management tools don’t work together