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An organization has private and public cloud resources. The organization has Windows Server 2012 R2 servers that have the Hyper-V role installed.
You have one four-node cluster of Hyper-V host servers. You use System Center 2012 R2.
The virtual machines that run on the cluster must remain online when you install updates on the Hyper-V host servers.
You need to install updates on the Hyper-V host servers.
What should you do?
A. Configure Windows Server Update Services (WSUS) to provide updates to the Hyper-V host servers in the cluster.
B. Add all the virtual machines hosted on the cluster to a collection in System Center 2012 R2 Configuration Manager. Deploy updates to the collection.
C. Use the Cluster-Aware Updating (CAU) wizard.
D. Configure Windows Update on the Hyper-V host servers to download updates from Microsoft Update.
Correct Answer: C
Explanation/Reference:
Ref: http://technet.microsoft.com/en-us/library/gg675084.aspx
CAU is an automated feature that enables you to update clustered servers with little or no loss of availability during the update process. During an Updating Run, CAU transparently performs the following tasks:
. Puts each node of the cluster into node maintenance mode
. Moves the clustered roles off the node
. Installs the updates and any dependent updates
. Performs a restart if necessary
. Brings the node out of maintenance mode
. Restores the clustered roles on the node
. Moves to update the next node
For many clustered roles (formerly called clustered applications and services) in the cluster, the automatic update process triggers a planned failover, and it can cause a transient service interruption for connected clients. However, in the case of continuously available workloads such as Hyper-V with live migration or file server with SMB Transparent Failover, CAU can coordinate cluster updates with no impact to the service availability.
Note
The CAU feature is only compatible with Windows Server 2012 R2 and Windows Server 2012 failover clusters and the clustered roles that are supported on those versions.
