06-Virtualization and the Cloud

[rainit2006]

• Benefits of virtualization in the cloud environment
• Virtual resource migrations
• Migration Considerations

[rainit2006]

Benefits of virtualization in the cloud environment

• Shared resources shared resources give a cloud provider the ability to distribute resources on a as-needed basis to the cloud consumer which helps to improve efficiency and reduce costs for organization.
• Elasticity
• Network and Application isolation
• Infrastructure consolidation(強化、統合)
• Virtual Data Center Creation

Virtual resource migrations

• Virtual Machine Templates
• Physical to Virtual (P2V) difference approach: manually, semi-automated approach, fully automated way can be: online or offline (more reliable)
• Virtual to Virtual (V2V) migrating a virtual machine to a host computer. .vmdk -> .vhd : VMware to Hyper OVF(open virtualization format): platform-independent extensible open package and distribution format.
• Virtual to Physical (V2P) more complex than P2V
  1. Microsoft sysprep tool need to be installed on virtual machine.
  2. all devices would need to be install
  3. symantc Ghost tool to facilitate the virtual-to- physical migration.
• Virtual machine cloning A virtual machine clone's MAC address and UUID is difference from those of parent virtual machine.
• Storage Migration Storage Migration is the process of transferring data between storage devices.

Migration Considerations

• Requirement Gathering
• Maintenance Scheduling
• Upgrading
• Testing After a successful migration, the network setting should be checked and verified before bringing the virtual machine online.