From c994cc174c2e77ab60989f5ac2ae7492e2515acc Mon Sep 17 00:00:00 2001 From: dbond007 Date: Wed, 19 Mar 2025 12:36:57 +0100 Subject: [PATCH 1/3] Update cluster-aware-updating.md CAU ordering Update the order that CAU runs to match what it does in reality. Microsoft support case says this documentation is incorrect for currently supported versions of windows. It is correct for server 2012r2. --- .../failover-clustering/cluster-aware-updating.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/WindowsServerDocs/failover-clustering/cluster-aware-updating.md b/WindowsServerDocs/failover-clustering/cluster-aware-updating.md index fe9887591e..7ab104a083 100644 --- a/WindowsServerDocs/failover-clustering/cluster-aware-updating.md +++ b/WindowsServerDocs/failover-clustering/cluster-aware-updating.md @@ -20,9 +20,9 @@ This topic provides an overview of Cluster\-Aware Updating \(CAU\), a feature th ## 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. +1. Installs the updates and any dependent updates. +2. Puts each node of the cluster into node maintenance mode. +3. Moves the clustered roles off the node. 4. Performs a restart if necessary. 5. Brings the node out of maintenance mode. 6. Restores the clustered roles on the node. From d96afbe4a99e14535f61325ff30541cd607c6615 Mon Sep 17 00:00:00 2001 From: dbond007 Date: Wed, 19 Mar 2025 12:56:15 +0100 Subject: [PATCH 2/3] Update cluster-aware-updating.md rewording Reworded steps 2 and 3 to add conditionals --- .../failover-clustering/cluster-aware-updating.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/WindowsServerDocs/failover-clustering/cluster-aware-updating.md b/WindowsServerDocs/failover-clustering/cluster-aware-updating.md index 7ab104a083..46fbe25422 100644 --- a/WindowsServerDocs/failover-clustering/cluster-aware-updating.md +++ b/WindowsServerDocs/failover-clustering/cluster-aware-updating.md @@ -21,8 +21,8 @@ This topic provides an overview of Cluster\-Aware Updating \(CAU\), a feature th 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. Installs the updates and any dependent updates. -2. Puts each node of the cluster into node maintenance mode. -3. Moves the clustered roles off the node. +2. Puts each node of the cluster into node maintenance mode if a restart is required. +3. Moves the clustered roles off the node if put into maintenance mode. 4. Performs a restart if necessary. 5. Brings the node out of maintenance mode. 6. Restores the clustered roles on the node. From d6da3f4033e1ce72075aa44b579b0948cd5b7289 Mon Sep 17 00:00:00 2001 From: dbond007 Date: Thu, 20 Mar 2025 09:25:06 +0100 Subject: [PATCH 3/3] Update cluster-aware-updating.md Cleanup of the ordering to make it more understandable. --- .../failover-clustering/cluster-aware-updating.md | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/WindowsServerDocs/failover-clustering/cluster-aware-updating.md b/WindowsServerDocs/failover-clustering/cluster-aware-updating.md index 46fbe25422..6bed6cbdad 100644 --- a/WindowsServerDocs/failover-clustering/cluster-aware-updating.md +++ b/WindowsServerDocs/failover-clustering/cluster-aware-updating.md @@ -21,11 +21,12 @@ This topic provides an overview of Cluster\-Aware Updating \(CAU\), a feature th 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. Installs the updates and any dependent updates. -2. Puts each node of the cluster into node maintenance mode if a restart is required. -3. Moves the clustered roles off the node if put into maintenance mode. -4. Performs a restart if necessary. -5. Brings the node out of maintenance mode. -6. Restores the clustered roles on the node. +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.