virtualization

virtualization

1. challenges

   • resource maintenance cost
   • data security
   • technical/infrastructure awareness required
   • system compatibility

2. way to run multiple OS on same h/w

   • isolated OS'es

3. benefits

   • server consolidation
   • scalability
   • migration of vm's
   • isolation
   • better security
   • data recovery/fault tolerance

4. drawbacks

   • time consuming while setting up
   • software licensing required
   • less performance

5. types of hypervisoors

   • type 1 (Bare Metal)
     • hardware virtualization
     • faster
     • better scalability due to direct access to h/w resources
   • type 2 (Hosted)
     • OS virtualization
     • slower due to os layer
     • less scalable due to os layer constraint

6. cloud computing+virtualization

   • better scalability
   • more secure
   • low maintenance cost
   • high availability

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