Your virtual environment includes Hyper-V host servers and VMware ESX Server hosts. You
manage the environment by using Microsoft System Center Virtual Machine Manager (VMM)
2008 R2. You need to enable non-administrative users to manage snapshots or checkpoints
for virtual machines (VMs) that are hosted on either host system. What should you do?
A.
Create checkpoints in VMM.
B.
Create snapshots by using Hyper-V Manager.
C.
Create checkpoints by using the VMM Self-Service Portal.
D.
Create snapshots from within the Virtual Machine Connection console.
Explanation:
You can grant self-service users permission to create and manage checkpoints for their
virtual machines. By creating checkpoints for a virtual machine, you can restore the virtual
machine to a previous state. A typical use of checkpoints is to create a temporary backup
before you apply update the operating system. The checkpoint enables you to revert the
virtual machine to its previous state if the update fails or adversely affects the virtual
machine. What Is a Checkpoint?
Each checkpoint saves the state of each virtual hard disk that is attached to a virtual
machine and all of the hard disk’s contents, including application data files. Use the Recover
action to restore a virtual machine to its state when a checkpoint was created.
For more information, seeHow to Restore a Virtual Machine to a Checkpoint. When you no
longer need to recover a virtual machine to a checkpoint, you should merge the checkpoint
to delete the associated files and recover disk space.
You can create as many as 64 checkpoints for any one virtual machine. However,
checkpoints use disk space and, when allowed to proliferate over long periods, can affect
performance during operations such as migrating a virtual machine. For this reason, it is a
good practice to routinely merge unneeded checkpoints.
Checkpoints are portable. When you migrate, store, or deploy a virtual machine, any existing
checkpoints move with the virtual machine.
You can create checkpoints only when a virtual machine is deployed on a host. You cannot
create checkpoints when a virtual machine is stored in the library.
It is advisable to shut down the virtual machine before creating a checkpoint. However, you
can create a checkpoint while a virtual machine is in a Stopped or Turned Off state. Doing so
stops the virtual machine momentarily while the checkpoint is created. If Virtual MachineAdditions is not installed on the virtual machine, the virtual machine is not shut down.
Instead, it is simply stopped;
this is similar to switching off the power on a physical machine while it is still running. To
avoid losing any data, ensure that the virtual machine is not in use and that no processes
are running on the virtual machine.
Several entry points are provided for creating checkpoints. You can use the New checkpoint
action for a selected virtual machine, or you can create and manage checkpoints while
updating the properties of a virtual machine VMM uses the same Single Port Listener
technology to provide the administrator with live thumbnails in the VMM Administrator
Console. The VMM Self-Service Portal and VirtualMachineViewer.exe also use the Single
Port Listener technology of RDP.
Do not use checkpoints for disaster recovery. Checkpoints do not create full duplicates of the
hard disk contents nor do they copy data to a separate volume. A checkpoint can serve as
temporary backup before updating an operating system on a virtual machine so that you can
roll back if the update has any adverse effects. You should use a backup application to back
up and recover your data in case of catastrophic data loss. Checkpoints provide a temporary
backup when you need to restore a virtual machine to a previous state after a change such
as a system or application update. However, you should not use checkpoints for the
permanent backup of the operating system, applications, or files.
Checkpoints are stored with the virtual machine on the host. Therefore, if the host fails while
the virtual machine is deployed, the checkpoints are lost. To provide data protection for your
virtual machines, you should instead use the Volume Shadow Copy Service (VSS) writer for
Virtual Server or a backup application such as System Center Data Protection Manager
(DPM) to back up your virtual machines to external storage