MCQ IN COMPUTER SCIENCE & ENGINEERING

COMPUTER SCIENCE AND ENGINEERING

CLOUD COMPUTING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which technology is able to support live migration of data centers?
A
virtualization
B
local storage
C
RAID
D
Network Optimization
Explanation: 

Detailed explanation-1: -VMware vSphere 5.1 and later versions combine standard vMotion with VMware vSphere Storage vMotion in a single migration. This means you can live-migrate an entire virtual machine between hosts, between clusters or between data centers-without disruption or shared storage between the involved hosts.

Detailed explanation-2: -Live migration is a Hyper-V feature in Windows Server. It allows you to transparently move running Virtual Machines from one Hyper-V host to another without perceived downtime. The primary benefit of live migration is flexibility; running Virtual Machines are not tied to a single host machine.

Detailed explanation-3: -vMotion allows you to: Migrate multiple virtual machines running any operating system across any type of hardware and storage supported by vSphere, complete with an audit trail.

Detailed explanation-4: -VM migration is the most important feature of virtualization. With this feature an OS state is transferred from one computing node to another physical node. There are two different techniques of migration, first is pre-copy migration and the second is post-copy migration technique.

Detailed explanation-5: -There are two types of VM migration: cold and live. Cold migration occurs when the VM is shut down. Live migration occurs while the VM is actually running.

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