No Single Point of Failure in Clustering
Clustering, by definition, should provide redundancy and high availability of server systems. However, in earlier versions of Windows clustering, a “quorum drive” was required for the cluster systems to connect to as the point of validation for cluster operations. If at any point the quorum drive failed, the cluster would not be able to fail over from one system to another. Windows Server 2008 / 2008 R2 and Windows Server 2012 clustering removed this requirement of a static quorum drive. Two major technologies facilitate this elimination of a single or central point of failure: majority-based cluster membership verification and witness-based quorum validation.
The majority-based cluster membership enables ...
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