MicroNugget: What is Failover Clustering in Windows Server 2012?
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In this video, Tim Warner covers how the failover clustering method provides high availability in applications and services. Microsoft made a number of tremendous improvements to this process in Windows Server 2012, and Tim gives a brief overview of those here, along with a detailed description of the process.
Failover clustering begins with physical servers that are imaged about as close to identical as you can get. These are called “nodes” and are all attached to some form of shared disk storage.
Each node in a traditional active/passive cluster has the capability of hosting a particular workload. This could be an installation of SQL Server, it could be a highly available file share, or it could be one or more Hyper-V virtual machines.
You want to ensure that if there’s a loss of one or more nodes, at least one node stays up and running so it can host your resources and continue to provide services to users. That’s where failover clustering comes into play.
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