Virtualization

Virtualization

1. benefits

   • very efficient
   • More productivity
   • We can reduce no of physical hardware neded
     • Thus reduction in cost
   • Virtual machines can operate different OS so that we can run different application on different computer
   • reduces the workload
   • better uptime

2. definition

   • A virtual environment that exists inside a computer, but not having its own physical devices
   • It utilizes some part of the actual hardware

3. Challenges

   • Distributing resources
   • VM gets stuck or freeze
   • Big VM with high consumption may affect the perfomance of the computer

4. Drawbacks

   • Implementation cost is high
   • Data at high rish
   • Certain limitation in implementation

5. Types of hypervisors

   • Type 1
     • replaces the existing OS
     • direct interaction with physical resources
   • Type 2
     • runs on existing OS
     • needs host OS to access memory

6. Examples

   • VMware
   • vSphere
   • HyperV

7. Cloud virtualization benefits

   • No system failure can occur
     • if one fails, we can switch with backup
     • Backup and disater recovery
   • Data security with virtual firewall
     • High level privacy
   • cloud providers need less time in maintaining the infrastructure
   • Automated services