This document discusses Cluster-Aware Updating (CAU) in Windows Server 2012. It provides an overview of how CAU works to update nodes in a failover cluster. The CAU update coordinator manages the updating process, pausing nodes, draining virtual machines, updating nodes, and failing back virtual machines in a coordinated manner. The document also provides links to Microsoft articles about CAU and integrating it with Dell server update tools.

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Technical Architect – FGIA
Microsoft MVP & MEET Member
http://workinghardinit.wordpress.com
@workinghardinit

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Windows Update Services

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12. Node 1 Node 64Node 2
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Windows Server 2012 Hyper-V Cluster
Dedicated WSUS ServerWindows Server 2012 File
Server (SMB 3.0)
Jenny, Cluster Admin
& Orchestrator
(RSAT)
Node 1 Node 64Node 2
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Windows Server 2012 Hyper-V Cluster
Microsoft Update
Services

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Jenny Starts
Updating Run
Node 64
Resume Node
& Failback VMs
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Node 1
Windows
Server failover
cluster
. . .
Windows Update,
WSUS, QFE, …
Pause Node
& Drain VMs
CAU

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Node 1
Failover Cluster
Update Coordinator
Node 2
Node 3
Node 4

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CAU Update
Coordinator
Failover Cluster
Node 1 Node 2
Node 3 Node 4

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CAU Hotfix Root Folder
CAUHotfix_All
<Node Name 1>
Extension Rules
<MSU>
<MSI>
<MSP>
Folder Rules
<MySwUpdateType>
Hotfix Config File
MySwUpdateType
Special software updates
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Hotfixes applicable to all nodes
Hotfixes applicable just to <Node Name 1>
Hotfixes applicable just to <Node Name N>
<Node Name 1>
MySwUpdateType
Special software updates
MySwUpdateType
Special software updates

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• CLUSTER-AWARE UPDATING OVERVIEW
• HTTP://TECHNET.MICROSOFT.COM/EN-US/LIBRARY/HH831694.ASPX
• CLUSTER-AWARE UPDATING CMDLETS IN WINDOWS POWERSHELL
• HTTP://TECHNET.MICROSOFT.COM/EN-US/LIBRARY/HH847221.ASPX
• STARTING WITH CLUSTER-AWARE UPDATING: SELF-UPDATING
• HTTP://BLOGS.TECHNET.COM/B/FILECAB/ARCHIVE/2012/05/17/STARTING-WITH-CLUSTER-AWARE-UPDATING-
SELF-UPDATING.ASPX
• UPDATE DELL SERVERS WITH MICROSOFT WINDOWS SERVER 2012 CLUSTER AWARE UPDATE BY
INTEGRATING SUU/DUP
• HTTP://EN.COMMUNITY.DELL.COM/TECHCENTER/EXTRAS/M/WHITE_PAPERS/20217029.ASPX