Virtualization Flashcards
What is virtualization?
Virtualization is the process of creating a virtual (rather than actual) version of something such as an operating system server storage device or network resources.
Explain the concept of server virtualization.
Server virtualization involves partitioning a physical server into multiple virtual servers each running its own operating system and applications. This allows efficient use of hardware resources and improves flexibility.
What is a hypervisor in virtualization?
A hypervisor or Virtual Machine Monitor (VMM) is software that enables the creation and management of virtual machines on a physical host. It sits between the hardware and the operating systems.
How does virtualization enhance resource utilization?
Virtualization enhances resource utilization by allowing multiple virtual machines to share the resources of a single physical server. This leads to better use of CPU memory and storage capacity.
What is the difference between Type 1 and Type 2 hypervisors?
Type 1 hypervisors run directly on the hardware and are also known as bare-metal hypervisors. Type 2 hypervisors run on a host operating system and are often called hosted hypervisors.
How does virtualization contribute to server consolidation?
Server consolidation involves running multiple virtual machines on a single physical server. Virtualization enables server consolidation by maximizing the use of server resources and reducing the number of physical servers needed.
Explain the concept of live migration in virtualization.
Live migration allows the movement of a running virtual machine from one physical host to another without disrupting its operation. This ensures high availability and minimizes downtime during maintenance or resource optimization.
What is a snapshot in virtualization?
A snapshot in virtualization is a point-in-time copy of the state of a virtual machine. It allows users to capture the VM’s current configuration and data providing a quick and easy way to revert to that state if needed.
How does virtualization contribute to disaster recovery?
Virtualization facilitates disaster recovery by enabling the creation of backup copies (snapshots) of virtual machines. In the event of a failure these snapshots can be used to restore the system to a previous state.
What role does virtualization play in cloud computing?
Virtualization is fundamental to cloud computing as it enables the efficient sharing and allocation of resources across multiple virtual machines and facilitates the rapid deployment and scaling of applications in the cloud.
