Virtualization

Virtualization

1. Uses

   • Server Consolidation
   • Ease of Devleopment
   • Cloud computing

2. Definition

   • Multiple operating systems
   • Isolation of OS
   • Physical machine
     • Hardware
       • Processor
       • IO bus
       • Chipset
     • Software
       • Single os image
       • Tightly coupled
   • Encapsulation

3. Hypervisor

   • Type 1 Bare metal
     • Complete Control
   • Type 2 Hosted
     • Avoids Duplication
     • Runs Native

4. Need

   • Runs multiple OS
   • Independant
   • Better resource utilization
   • Flexible Infrastrcutre

5. Challenges

   • Performance monitoring
   • Security
     • Hyper jacking
     • Guest hopping
   • VM sprawl
   • Capacity planning
   • Licensing issues