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windows server 2012 R2 hyper-v

Hyper-V Live migration

migration of computing resources and migration of storage resources. Migration of storage resources requires shared directories,

Authentication protocols: CredSSP and Kerberos

Performance options: TCP/IP; compression and SMB

Hyper-V replication

This is a copy of hyper-v that allows for a plannable failover. Use high availability. But there will be downtime in between. Clustering solves the single point fail-over feature, but clustering requires storage-which can be economically stressful for small businesses. For small businesses, we can actually use Hyper-v replication to implement virtual machine replicas. In this way, when a Hyper-v host has a physical failure, another Hyper-v host has replicas of these important virtual machines, so we can enable replicas to continue providing services to the outside world.

hyper-v virtual disk

Fixed size: Disk performance is best, fixed size does not cause disk size changes due to writes and deletions.

Dynamic disks: Start with a small footprint and perform less well than fixed-size disks. The writing of data is not continuous, and once the physical disk space is full, the disk space cannot be increased.

Differential disks: Must be used with master disks, in the same format as master disks, suitable for rapid deployment of virtual machines.

vhd can be converted to vhdx, virtual disks can be edited for compression and expansion; disk resizing online

Hyper-V considerations

Redefine virtual machine installation location

hyper-v snapshot

Create snapshot avhdx format virtual disk, original virtual machine disk will become difference disk, master is the first virtual disk. Deleting snapshots merges files in the virtual machine to master.

Import and export of hyper-v virtual machines

Import: Register VM in-place; Restore VM; Copy VM

hyper-v windows server backup backup virtual machine files

Backup virtual machines, restore virtual machines in case of file loss

Use of hyper-v vhd

You can attach and import vhd to a physical machine or virtual machine to achieve rapid access to resources.

Hyper-V P2V to achieve physical machine migration backup

Hyper-V's new features

client hyper-v; automation support technology;hyper-v copy; storage migration; virtual fibre channel;SR-IOV

Hyper-v virtual machine connectivity enhanced session mode

Hyper-v VM connectivity no longer uses emulated graphics cards, mouse, and keyboard to control guest VMs. Hyper-v Virtual Machine Connect, by contrast, provides all the power of Remote Desktop Connect (RDC): using clipboards. Directs the sound card on the virtual machine to the host. Virtual machines use smart cards from host hosts. The virtual machine uses the host host's USB interface. Use the host host printer. Plug and play devices are supported. Use the host host's drive.

Hyper-v 2nd generation virtual machine

Unified Extensible Firmware Interface (UEFI); Legacy free;SCSI boot; Faster deployment: Generation 2 virtual machines installed over networks are significantly faster than Generation 1 virtual machines for two reasons: First, legacy network adapters are no longer needed on Generation 2 virtual machines. Second, Scsi controllers are faster than IDE drives. For these two reasons, installing an identical guest system can be twice as fast in a Generation 2 virtual machine as in a Generation 1 virtual machine.

Hyper-V high-availability

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