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Windows Failover Clustering can keep your SQL Server databases online and your customers happy when hardware or operating system problems strike. Failover Clustering also makes your life easier when you need to do maintenance on a physical server: just fail your SQL.
Server instance over to another server and complete your work with minimal downtime. But be careful: if you misconfigure your cluster, you're bound for poor SQL Server performance or extended unplanned downtime. You shouldn't let an otherwise great high availability feature cause weak performance or outages. Let's learn how to avoid the some of the most prevalent SQL cluster setup mistakes.