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Update cluster-aware-updating.md CAU ordering #8037

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Update cluster-aware-updating.md CAU ordering
dbond007 Mar 19, 2025
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Update cluster-aware-updating.md rewording
dbond007 Mar 19, 2025
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Update cluster-aware-updating.md
dbond007 Mar 20, 2025
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13 changes: 7 additions & 6 deletions WindowsServerDocs/failover-clustering/cluster-aware-updating.md
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Expand Up @@ -20,12 +20,13 @@ This topic provides an overview of Cluster\-Aware Updating \(CAU\), a feature th
## <a name="BKMK_OVER"></a>Feature description
Cluster-Aware Updating is an automated feature that enables you to update servers in a [failover cluster](failover-clustering-overview.md) with little or no loss in availability during the update process. During an Updating Run, Cluster-Aware Updating transparently performs the following tasks:

1. Puts each node of the cluster into node maintenance mode.
2. Moves the clustered roles off the node.
3. Installs the updates and any dependent updates.
4. Performs a restart if necessary.
5. Brings the node out of maintenance mode.
6. Restores the clustered roles on the node.
1. Installs the updates and any dependent updates.
2. If updates need a restart.
1. Puts each node of the cluster into node maintenance mode.
2. Moves the clustered roles off the node if put into maintenance mode.
3. Performs a restart.
4. Brings the node out of maintenance mode.
5. Restores the clustered roles on the node.
7. Moves to update the next node.

For many clustered roles in the cluster, the automatic update process triggers a planned failover. This 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, Cluster-Aware Updating can coordinate cluster updates with no impact to the service availability.
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