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If all goes well the wizard will complete with a Success status.
The update coordinator is the node that ensures that the update process is applied throughout the cluster.
The CAU role is also cluster-aware, which means that more than one node can become the CAU update coordinator - but only one node at a time can be an update coordinator.
Cluster Aware Updating (CAU) is a new feature that makes running Windows or Automatic Updates on a Hyper-V cluster easier than ever, as well as any other WS2012 cluster.
If you currently have a Windows Server 2008/R2 Hyper-V cluster, then you have a few options for patching it with no VM downtime: VMs are Live Migrated throughout the cluster as the CAU job runs and each host is put into a paused state (automatically Live Migrating VMs off), patching, rebooting, and un-pausing. The process is actually quite configurable, enabling you to definite variables for decisions, execute scripts at different points, and define a reboot timeout (for those monster hosts).
Launch the Cluster-Aware Updating Wizard and then run Apply Updates To This Cluster.
WS2012 R2 Hyper-V uses live migration by default for VMs of all priorities.Relying on scripts or third party tools would not always ensure that patching proceeded as expected.The purpose of this post is to give you a brief introduction to a new feature called Cluster Aware Updating (CAU), and in a later post I will take you through a live demo.The good news is that in Server 2012 we have something called Cluster Aware Updating () that is meant to provide a reliable and automated method of patching clusters.
When the feature is installed, instead of manually having to choose which updates the nodes need and applying them one at a time, you can allow the CAU service to determine the required updates by pointing to sources such as Windows Update Agent(WUA), Windows Server Update Services(WSUS), or even choose a location on a file share.Windows Server 2012 (WS2012) introduced Cluster-Aware Updating (CAU) to allow each member of a cluster be paused, drained of highly available (HA) roles, patched, and rebooted in an orchestrated manner.