Virtualization

Virtualization

1. Hypervisor

   • Types
     • Type 1
       • Differences
         • Less overhead vs more overhead
         • Directly on hardware vs directly on OS
       • Bare-Metal Hypervisor
     • Type 2
       • Hosted Hypervisor
   • Allow multiple OS to run on a single host
   • Advantages
     • More OS at the same time
     • Manage VMs

2. VMWare ESXi

   • Attributes
     • Upto 480 physical cores per host
     • Upto 12 TB of ram per host
     • Upto 2048 virtual machines per host
   • Bare-Metal Hypervisor
     • Very less overhead
     • Sits directly on hardware
   • Features
     • Server Consolidation
     • Easier Backup and Recovery
     • Cost Effective

3. vCenter

   • Attributes
     • Connect upto 10000 hosts
     • Open, close and manage VMs
   • Single Sign-on
     • Access from anywhere
   • Features
     • Manage Multiple Hosts
     • Turn on, off multple VMs at one time
     • Take backup and migrate VMs

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