Virtualization

Virtualization

1. 1)Process of running a virtual instance of a computer system in a layer abstracted from the actual hardware. 2)it refers to running multiple operating systems on a computer system simultaneously

2. Benefits

   • Reduce downtime
   • Increase efficiency
   • Control independence and DevOps
   • Move to be more green-friendly
   • Speedy Recovery Time afte Disaster
   • Better Scalability
   • easier IT management,

3. Challenges

   • Resource distribution
   • Backward compatibility
   • Performance monitoring
   • Backup
   • Security

4. Drawbacks

   • high cost of implementation
   • Data Can be at Risk
   • Server security
   • Single point of failure
     • if physical server is down ,then large amout of ata results in loss

5. Types of hypervisor

   • Type-1
     • 1)It runs directly on the physical hardware of thehost machine. 2)Also,it doesn’t have to load an underlying Operating System before that.
       • VMware ESXi Server
       • Microsoft Hyper-V
       • Ctrix/Xen Server
   • Type-2
     • 1)The hypervisor is installed on an operating system and then supports other operating systems above it.2)It is completely dependent on host Operating System for its operations
       • Oracle Virtual Box
       • Microsoft Virtual PC
       • VMware Workstation

6. Virtualization in Cloud Computing

   • Usually, what happens in the cloud - the users not only share the data that are located in the cloud-like application but also share their infrastructures with the help of virtualization
   • BENEFITS:Workload management is more efficient, economic and scalable.