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Last thing to do is open your SSMS and note your Current build and Version just by issuing For me the current Output is you might be seeing Browser and FTS services as running since they are not clustered (SQL Cluster Patch installation will take care of those services as needed).
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Very Important: You should remove Node 2 as a possible owner through out the patching process of Node2, making sure that SQL is not going(allowed) to failover to Node2 for any reason throughout this process.Īlso,Just to double check open your SQL Server Configuration manager on your Node2 and you should be seeing SQL Server and SQL Server Agent as Offline as shown below. You can see below in the screenshot that Node1 is owning every SQL resource. So I’ll make sure that SQL and all other dependencies are running on Node1. Let’s begin! I’ve chosen to patch my second node first. Once patching is completed successfully on your idle node, you’ve to manually failover both the Instances to this node and patch the other node. You’ve to Manually failover your SQL Services to other node(so at this point 2 instances of SQL will be running on single node) and you’ve to apply patch to idle node. Same logic applies to Active-Active Cluster as well. Starting 2008 MSFT avoided this, basically making High Availability Solution more highly available 😉
Let us say…we’ve 8 Nodes, in this case SQL Server will not be available until all the Nodes are successfully being patched. But this leads to more down time depending on number of Nodes involved in your Cluster. Earlier SQL patching was cluster aware where it used to automatically patch all the nodes in your Cluster. This model has been introduced starting SQL 2008. Once completed, we’ve to manually failover SQL Services to Node2(Currently SQL is running on Node1) and apply patch on Node1.
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To be very simple and precise, We’ve to Install SP2 on our Passive Node(I’ve chosen Node2 as current Passive) first. Let’s begin! FYI I’ve downloaded SQL Server 2008 Service Pack 2 from microsoft and copied the exe files onto both the Nodes of our Cluster. So at this moment our SQL Version will be at RTM, let’s apply Service pack 2 over our RTM.
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This would be the last part of this Cluster Installation Series! In the Previous part, I’ve shown you how to Configure an Active-Passive SQL Server 20008 Failover Cluster.
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